JP2012105478A - Transmission device, electronic equipment, and transmission method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transmission device capable of contactlessly transmitting power efficiently and contactlessly transmitting a signal at a high data rate by simple configuration.SOLUTION: There are provided a power supply device 422 for wirelessly supplying a power transmission signal Power, a power reception device 412 for receiving the power transmission signal Power supplied from the power supply device 422, and a transmission device 1 for transmitting a signal to be transmitted between a first communication device 418 and a second communication device 428 by radio waves. Settings are made so that a frequency of the power transmission signal Power transmitted between the power supply device 422 and the power reception device 412 is different from a frequency of a carrier signal for transmitting a signal between the first communication device 418 and the second communication device 428.

Description

  The present invention relates to a transmission device, an electronic device, and a transmission method.

  Techniques for transmitting electric power in a non-contact manner (also referred to as wireless) are disclosed in, for example, Japanese Patent Application Laid-Open Nos. 2002-26778 and 2004-80844.

JP 2002-26778 A JP 2004-80844 A

  The technique disclosed in Japanese Patent Laid-Open No. 2002-26778 uses a common carrier for signal transmission and power transmission, that is, uses a power transmission signal for transmitting power in a contactless manner as a carrier signal for signal transmission. There is a trade-off relationship between power transmission efficiency and data rate (in other words, transmission bandwidth). For this reason, it is practically impossible to increase the data rate (in other words, to widen the transmission bandwidth) while increasing (preferably maximizing) the power transmission efficiency.

  The method disclosed in Japanese Patent Laid-Open No. 2004-80844 separates a power transmission signal for transmitting power in a contactless manner and a carrier signal for signal transmission, but signal transmission is performed by optical communication. The configuration becomes complicated.

  A first load device such as a first communication device provided in one unit and a second load device such as a second communication device provided in the other unit attempt to perform synchronized processing. In this case, the reference signal needs to be transmitted from one unit to the other unit. However, neither JP-A-2002-26778 and JP-A-2004-80844 disclose this point.

  The first object of the present invention is to provide a technique capable of transmitting power efficiently and in a non-contact manner and capable of performing a signal transmission with a high data rate in a non-contact manner with a simple configuration. A second object of the present invention is to provide a technique capable of transmitting electric power in a contactless manner and transmitting a reference signal in a contactless manner with a simple configuration.

The transmission apparatus according to the first aspect of the present invention for achieving the first object is:
A power supply device for supplying a power transmission signal wirelessly;
A power receiving device for receiving a power transmission signal supplied from the power supply device; and
A transmission device and a reception device that transmit signals to be transmitted by radio waves,
With
The frequency of the power transmission signal transmitted between the power supply device and the power receiving device is set to be different from the frequency of the carrier signal for transmitting the signal to be transmitted by radio waves between the transmission device and the reception device. Yes. Each transmission device described in the dependent claims of the transmission device according to the first aspect of the present invention defines a further advantageous specific example of the transmission device according to the first aspect of the present invention.

The transmission apparatus according to the second aspect of the present invention for achieving the second object is:
A first load device that receives a supply of power and performs predetermined signal processing;
A power supply device that wirelessly supplies power by generating a power transmission signal based on a reference signal that is a reference for signal processing in the first load device and transmitting the signal wirelessly;
A power receiving device for receiving a power transmission signal supplied from the power supply device;
A second load device for receiving a power transmission signal from the power receiving device and performing predetermined signal processing;
A reference signal generation unit configured to generate a reference signal serving as a reference for signal processing in the second load device based on the power transmission signal received by the power receiving device. Each transmission device described in the dependent claims of the transmission device according to the second aspect of the present invention defines a further advantageous specific example of the transmission device according to the second aspect of the present invention.

An electronic device according to a third aspect of the present invention for achieving the first object is:
A power supply device for supplying power wirelessly;
A power receiving device for receiving the power supplied from the power supply device;
A transmission device that wirelessly transmits a signal to be transmitted;
A receiving device for receiving a transmission target signal transmitted from the transmitting device;
With
The transmission device, the power supply device, the power reception device, and the reception device are arranged in one housing, or the one and the power supply device arranged on the power supply device side of the transmission device and the reception device are The one disposed in the first housing and the power receiving device, the transmitting device, and the receiving device disposed on the power receiving device side is disposed in the second housing,
The frequency of the power transmission signal transmitted between the power supply device and the power receiving device is set to be different from the frequency of the carrier signal for transmitting the signal to be transmitted by radio waves between the transmission device and the reception device. Yes.

An electronic device according to a fourth aspect of the present invention for achieving the second object is:
A first load device for receiving a power supply and performing predetermined signal processing;
A power supply device that wirelessly supplies power by wirelessly transmitting a power transmission signal generated based on a reference signal that is a reference for signal processing in the first load device;
A power receiving device for receiving a power transmission signal supplied from the power supply device;
A second load device that receives a power transmission signal from the power receiving device and performs predetermined signal processing; and
A reference signal generating unit that generates a reference signal serving as a reference for predetermined signal processing in the second load device based on the power transmission signal received by the power receiving device;
With
The first load device, the power supply device, the power receiving device, and the second load device are arranged in one housing, or the first load device and the power supply device are in the first housing. The power receiving device and the second load device are arranged in the second housing.

The transmission method according to the fifth aspect of the present invention for achieving the first object is:
A power transmission signal emitted from the power supply device is wirelessly sent to the power reception device, and power is generated in the power supply device based on the power transmission signal and supplied to the power transmission device or reception device,
While setting the frequency of the power transmission signal and the frequency of the carrier signal for signal transmission to be different, the signal to be transmitted between the transmitting device and the receiving device is transmitted using the carrier signal in the radio frequency band. To transmit.

The transmission method according to the sixth aspect of the present invention for achieving the second object is as follows:
A power transmission signal generated based on a reference signal serving as a reference for signal processing in the first load device is wirelessly transmitted to supply power to the load device on the power receiving side, and on the power receiving side based on the received power transmission signal A reference signal serving as a reference for predetermined signal processing in the load device is generated.

  According to the transmission device according to the first aspect of the present invention, the electronic device according to the third aspect of the present invention, and the transmission method according to the fifth aspect of the present invention, power is transmitted in a contactless manner, Signal transmission with a high data rate can be performed in a non-contact manner with a simple configuration. That is, when using both wireless power supply and wireless signal transmission, the frequency of the power transmission signal is different from the frequency of the carrier signal for signal transmission, so that power transmission efficiency and data rate (in other words, transmission bandwidth) Each can be made independent and appropriate. In addition, signal transmission is performed wirelessly (radio waves) regardless of electrical wiring or light. Since radio waves are used, wireless communication technology can be applied, and the difficulties in using electrical wiring can be eliminated, and a signal interface can be constructed with a simpler and less expensive configuration than in the case of using light. This is more advantageous than using light in terms of size and cost.

  According to the transmission device according to the second aspect of the present invention, the electronic device according to the fourth aspect of the present invention, and the transmission method according to the sixth aspect of the present invention, power transmission received by non-contact power transmission Since the reference signal serving as a reference for the signal processing on the power receiving side is generated based on the signal, it is possible to transmit the power in a non-contact manner and transmit the reference signal in a non-contact manner with a simple configuration.

FIG. 1 is a circuit block diagram of an electronic apparatus and a transmission apparatus according to the first embodiment. 2A to 2B are diagrams for explaining operations of the electronic apparatus and the transmission apparatus according to the first embodiment. FIG. 3 is a circuit block diagram of the electronic apparatus and the transmission apparatus according to the second embodiment. FIG. 4 is a schematic diagram of an arrangement mode of units constituting the electronic device and the transmission device according to the second embodiment. FIG. 5 is a circuit block diagram of an electronic apparatus and a transmission apparatus according to the third embodiment. FIG. 6A to FIG. 6B are diagrams illustrating operations of the electronic device and the transmission device according to the third embodiment. FIG. 7 is a circuit block diagram of an electronic apparatus and a transmission apparatus according to the fourth embodiment. FIG. 8 is a schematic diagram of the overall outline of the electronic apparatus and the transmission apparatus according to the fifth embodiment. FIG. 9 is a schematic diagram of an arrangement mode of units constituting the electronic apparatus and the transmission device according to the fifth embodiment. FIG. 10 is a diagram illustrating a first example of an electronic apparatus according to the sixth embodiment. FIG. 11 is a diagram illustrating a second example of the electronic apparatus according to the sixth embodiment. FIG. 12 is a diagram illustrating a third example of the electronic apparatus according to the sixth embodiment. FIG. 13A to FIG. 13B are diagrams for explaining a comparison between the present invention and a comparative example. FIG. 14 is a diagram for explaining the phase uncertainty and a countermeasure technique thereof.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. When distinguishing each functional element by form, an uppercase alphabetic reference is added, such as A, B, C,..., And this reference is omitted when it is not particularly distinguished. And describe. The same applies to the drawings.

The description will be made in the following order.
1. Overall overview 2. Transmission processing system: Basic Specific Application Example Example 1: 1: 1 contactless power transmission and 1: 1 signal transmission Example 2: Specific example of 1: 1 contactless power transmission and 1: 1 signal transmission Example 3: One-to-many contactless power transmission and one-to-many signal transmission Example 4: One-to-many contactless power transmission and many-to-many signal transmission Example 5: One-to-many contactless power transmission and one-to-many Specific example of signal transmission in Example 6: Application example to other electronic devices Contrast with comparative example 5. Phase uncertainty and countermeasures

<Overview>
In the transmission device of the present embodiment, one load device (for example, a communication device) and the other load device (for example, a communication device) each transmit a power source that requires power transmission wirelessly based on a device that performs signal processing. That is, it is characterized in that a configuration is added in which the power used by the other (the other party) load device is supplied wirelessly from the side having the one load device. One load device includes a power supply unit that is an example of a power transmission terminal that wirelessly supplies power used by the other load device, and the other load device is wirelessly transmitted from the one load device side. A power receiving unit (power receiving device) that is an example of a power receiving terminal that receives the received power is provided. The power supply unit on the power transmission side and the power reception unit on the power reception side are collectively referred to as a power circuit, and a non-contact power transmission device is configured by these. First, basic items will be described below.

[Transmission equipment, transmission method: non-contact power transmission + signal (data) transmission]
In the first configuration of the present embodiment corresponding to the first and fifth aspects of the present invention, the transmission device is a power supply device that wirelessly supplies a power transmission signal, and the power supplied from the power supply device. A power receiving device that receives a transmission signal, and a transmission device (transmission-side communication device) or a reception device (reception-side communication device) that transmits a signal (data) to be transmitted by radio waves. Provided in the transmission apparatus. The power supply apparatus includes a power transmission element that generates a power transmission signal and a power supply unit that drives the power transmission element. The power receiving device includes a power receiving element that receives a power transmission signal and a power receiving power supply unit that generates power based on the power transmission signal received by the power receiving element. The frequency of the power transmission signal transmitted between the power supply device and the power reception device is different from the frequency of the carrier signal for signal transmission between the communication device on the transmission side and the communication device on the reception side. Set. That is, a power transmission signal generated from the power supply device is wirelessly transmitted to the power reception device, and power is generated in the power supply device based on the power transmission signal and supplied to the power receiving communication device. In addition, while setting the frequency of the power transmission signal and the frequency of the carrier signal for signal transmission to be different, the signal to be transmitted between the power supply side communication device and the power reception side communication device is set in the frequency band of the radio wave. Transmit using carrier signal.

  In the first configuration, the signal transmission device uses only signals that require high speed and large capacity as transmission target signals, and other low-speed and small-capacity signals or signals that can be regarded as direct current, such as a power source, are transmitted to radio waves. It is also possible to adopt a mode in which the signal is not subject to the conversion, and further, other low-speed and small-capacity signals that are sufficient may be included in the transmission target signal by radio waves. Incidentally, the power source is wirelessly transmitted by the power supply device and the power receiving device. Signals that are not subject to wireless transmission are connected in the same way as before, for example, using electrical wiring such as flexible printed circuit boards (FPC) and cables, or using mechanical connections such as slip rings. To do. The original electric signals to be transmitted before being converted into radio waves are collectively referred to as baseband signals. In addition to signals that require high speed and large capacity, other low-speed and small-capacity signals may be transmitted by radio waves. In this case, all signals including power (electric power) can be transmitted wirelessly. .

  In the first configuration, it does not basically matter where the power supply device, the power receiving device, one communication device, and the other communication device are arranged. It may be arranged in the unit. However, in terms of non-contact transmission without using electrical wiring, the power supply device and one communication device are arranged in the power supply side unit, and the power reception device and the other communication device are in the power reception side unit. The form arrange | positioned in is suitable. That is, it is preferable to apply the present invention to transmission between units.

  Here, the “unit” is also referred to as a module, and both one device and the other device when transmitting power and signals in a non-contact manner rather than electric wiring correspond to the “unit”. . Any unit is included in the “unit” as long as it has the above relationship. For example, a circuit board mounted in a semiconductor module or electronic device is typically the minimum unit, but is not limited thereto. For example, one device and the other when transmitting power and signals in a contactless manner instead of electrical wiring, such as handling the vehicle body and steering in the vehicle as units, and handling the instrument panel and meter in the vehicle as units, respectively. As long as it has a relationship with this device, any of them corresponds to a “unit”. That is, everything that can be understood as a relationship between the power feeding (power transmission) side and the power receiving side corresponds to the “unit”.

  In the first configuration, it is preferable to generate a reference signal for the power receiving communication device from the power transmission signal. That is, based on the power transmission signal received by the power receiving device, a reference signal serving as a reference for the carrier signal used for signal transmission by one communication device that operates by receiving the supply of power generated by the power receiving device. It is preferable that the power supply device and the other communication device perform a process in charge of each based on the same reference signal. By doing so, the modulation processing (or demodulation processing) in the power supply side communication device and the demodulation processing (or modulation processing) in the power supply side communication device can be performed synchronously, and a synchronous detection method is used for the demodulation processing. It becomes a suitable mode when used. In this case, it is preferable that the communication device on the reception side includes a timing signal generation unit that generates a carrier signal for performing demodulation processing by a synchronous detection method based on the reference signal generated by the reference signal generation unit.

  In the first configuration, a plurality of sets of power supply devices and power reception devices may be provided, and a reference signal generation unit may be provided for each of the plurality of power reception devices. That is, a configuration in which a plurality of pairs of the power feeding side and the power receiving side are provided can be provided. In this case, a reference signal generation unit and a timing signal generation unit may be provided corresponding to each.

  In the first configuration, a configuration having a plurality of sets of transmitting devices and receiving devices can be employed. Note that “having a plurality of sets of transmitting devices and receiving devices” means having a plurality of signal transmission systems composed of transmitting devices and receiving devices. 1 is not limited to the presence of a plurality of transmission devices and reception devices. For example, when a plurality of reception devices are arranged for one transmission device, or a single reception device. On the other hand, the case where a plurality of transmission devices are arranged is included. This also applies to other inventions described later. The first mode in which one transmission device or one reception device is also used as a plurality of signal transmission systems can be adopted. If the 1st form is taken, the structure of the side used as a transmission side and the receiving side will become simple. Further, it is possible to adopt a second form in which a plurality of signal transmission systems each composed of a transmission device and a reception device are provided, and signal transmission is performed by frequency division multiplexing. If the 2nd form is taken, each signal transmission system can perform simultaneous communication, without receiving interference from another system.

  In the first configuration, it is preferable that the signal transmission apparatus mainly uses a carrier frequency in the millimeter wave band (wavelength is 1 to 10 millimeters). However, it is not limited to the millimeter wave band, but near the millimeter wave band such as a sub-millimeter wave band (wavelength is 0.1 to 1 millimeter) or a longer wavelength centimeter wave band (wavelength is 1 to 10 centimeters). The present invention can also be applied to the case where the carrier frequency is used. For example, a sub millimeter wave band to a millimeter wave band, a millimeter wave band to a centimeter wave band, or a sub millimeter wave band to a millimeter wave band to a centimeter wave band may be used.

[Transmission equipment, transmission method: non-contact power transmission + reference signal transmission]
In the second configuration of the present embodiment corresponding to the second aspect and the sixth aspect of the present invention, the transmission device includes a first load device that performs predetermined signal processing upon receiving power supply. A power supply device that generates a power transmission signal based on a reference signal that is a reference for signal processing in the first load device and supplies the power transmission signal wirelessly; and a power reception device that receives the power transmission signal supplied from the power supply device A second load device that performs predetermined signal processing upon receiving power from the power receiving device, and a signal processing reference in the second load device based on the power transmission signal received by the power receiving device A reference signal generation unit that generates a reference signal. The power supply apparatus includes a power transmission element that generates a power transmission signal and a power supply unit that drives the power transmission element. The power receiving device includes a power receiving element that receives a power transmission signal and a power receiving power supply unit that generates power based on the power transmission signal received by the power receiving element. And while transmitting the electric power transmission signal produced | generated based on the reference signal used as the reference | standard of the signal processing in a 1st load apparatus by radio | wireless and supplying electric power to the receiving side load apparatus, based on the received electric power transmission signal A reference signal serving as a reference for predetermined signal processing in the load device on the power receiving side is generated.

  Incidentally, in the second configuration, the first load device on the power feeding side is one (power feeding side) communication device, and the second load device on the power receiving side is the other (power receiving side) load device. The signal to be transmitted may be transmitted wirelessly between the power supply side communication device and the power reception side communication device. In this case, when a signal to be transmitted is transmitted wirelessly, not only radio waves but also light may be used, and power transmission and signal transmission may be performed with different signals, and power transmission is limited to that limit. The frequency of the signal and the frequency of the carrier signal for signal transmission may be different or the same. However, from the viewpoint of preventing the influence of noise or the like due to the power transmission signal, preferably, the frequency of the power transmission signal is different from the frequency of the carrier signal for signal transmission. As long as the frequency of the power transmission signal does not overlap with the frequency band used for wireless communication of information, various frequencies may be used as long as the frequency band does not overlap. In addition, there are limitations on the applicable modulation schemes, but when a reduction in power transmission efficiency is permitted, each carrier of signal transmission and power transmission may be shared (in this case, the frequency of the power transmission signal and The frequency of the carrier signal for signal transmission is the same).

  In the second configuration, it does not basically matter where the power supply device, the power receiving device, the first load device, and the second load device are arranged. Or may be arranged in the same unit. However, in terms of non-contact transmission without using electrical wiring, the power supply device and the first load device are arranged in the power supply side unit, and the power reception device and the second load device are the power reception side. The form arranged in the unit is suitable.

  In the second configuration, it is preferable to generate a reference signal for the second load device on the power receiving side from the power transmission signal. That is, both the power supply device and the first load device perform the processing that they are in charge of based on the same reference signal, and the second load device is based on the reference signal generated by the reference signal generation unit. It is preferable to perform predetermined signal processing in synchronization with signal processing in one load device. By doing so, the signal processing in the first load device on the power supply side and the signal processing in the second load device on the power supply side can be performed in synchronization.

  In any of the first configuration and the second configuration, when the reference signal generation unit is provided, preferably, the phase of the power transmission signal generated by the power supply device and the phase of the power transmission signal received by the power reception device It is preferable to provide a phase processing unit that suppresses the influence due to the mismatch.

  In any of the first configuration and the second configuration, a configuration including a plurality of power receiving devices that generate power using a power transmission signal generated from one power supply device in common can be employed. That is, it is possible to adopt a configuration in which a plurality of power receiving elements are arranged for one power transmitting element.

  Each of the first configuration and the second configuration includes one power supply unit including a plurality of power supply devices, and one power reception device corresponding to any one of the plurality of power supply devices. Further, it is possible to adopt a configuration in which the power receiving unit is provided for each of the plurality of power supply devices. That is, there are a plurality of pairs of the power feeding side and the power receiving side, but the power feeding side is one unit. In this case, it is preferable that the power receiving element on the power receiving side and the power transmitting element on the power feeding side are arranged so as to overlap when viewed in plan, and each system is driven at a different frequency. Specifically, each of the plurality of power supply devices includes a power transmission element that emits a power transmission signal and a power supply power source that drives the power transmission element, and each of the plurality of power reception devices receives a power transmission signal and a power reception device. A power receiving power supply unit that generates power based on a power transmission signal received by the element is provided, and each of the plurality of power transmitting elements is arranged in a plane so as to be coaxial, and the plurality of power transmitting elements and the plurality of power receiving elements are arranged. The corresponding elements are arranged so as to overlap each other on the same axis. And it is good to drive the power transmission element which each of several electric power feeding power supply parts respond | corresponds to respectively different frequency.

  In either of the first configuration and the second configuration, the power receiving side includes a plurality of power supply side units including the power supply device, and includes one power receiving device corresponding to any one of the plurality of power supply devices. The unit provided for each of the plurality of power supply devices can be adopted. In this case, the power receiving element and the power transmitting element may be arranged in parallel when viewed in plan, and in this case, each system may be driven at the same frequency. Specifically, a plurality of power receiving units including a power receiving device are provided, and a plurality of power feeding units including a power supply device are provided so as to correspond to each of the plurality of power receiving units. Each of the plurality of power supply devices includes a power transmission element that emits a power transmission signal and a power supply unit that drives the power transmission element, and each of the plurality of power reception devices receives a power transmission signal and the power received by the power reception element A power receiving power supply unit that generates power based on the transmission signal is provided. Further, the plurality of power supply units are provided so as to be arranged at different positions when each of the plurality of power transmission elements is viewed in plan, and the plurality of power reception units include a plurality of power transmission elements and a plurality of power reception elements. Corresponding items are provided so as to overlap each other on the same axis. Each of the plurality of power supply units drives the corresponding power transmission element at a different frequency or the same frequency.

  In both the first configuration and the second configuration, when a configuration including a plurality of sets of power supply devices and power reception devices is provided, each of the plurality of power supply devices (specifically, the power supply unit) corresponds. It is good to control on / off of the drive of the power transmission element to perform separately. In this way, each on / off control of each power receiving side communication device and load device receiving power from each of the plurality of power receiving devices is controlled in conjunction with each on / off control of power transmission element driving. can do.

[Non-contact power transmission equipment]
Various methods of transmitting power wirelessly (contactlessly) from a power supply device (also referred to as a power supply device or a power transmission terminal) to a power reception device (also referred to as a power reception device or a power reception terminal) have been proposed. Yes. A method of transmitting power in a contactless manner is referred to as “contactless power feeding”, “wireless power feeding”, “wireless power transmission”, or the like. The principle of non-contact power transmission uses electromagnetic energy, and is roughly divided into a radiation type (radio wave reception type and radio wave harvesting type) and a non-radiation type. The radiation type is further classified into a microwave type and a laser type, and the non-radiation type is further classified into an electromagnetic induction type and a resonance type (also referred to as an electromagnetic resonance type). As another classification method, there is a method of distinguishing depending on whether or not an electromagnetic coil is used. In this case, the radio wave receiving type corresponds to a method not using an electromagnetic coil, and the electromagnetic induction type and the resonance type correspond to a method using an electromagnetic coil. To do. If these methods are used, an interface through electrical wiring and terminals is completely unnecessary, and a cable-less device configuration can be achieved. All signals including the power supply can be transmitted wirelessly.

  In any of the methods, a power supply unit including a power transmission element and a power supply unit serving as a power transmission element driving circuit for driving the power transmission element is provided on a power transmission side (also referred to as a primary side). The power receiving unit equipped with a receiving power supply unit such as a rectifier circuit that shapes the received power into a convenient form (difference between DC and AC, voltage, etc.) for use in the subsequent circuit is called the receiving side (also called the secondary side) The power is transmitted wirelessly by electromagnetic coupling between the power transmitting element and the power receiving element.

  For example, the radio wave reception type uses radio wave energy, and converts an AC waveform obtained by receiving radio waves into a DC voltage by a rectifier circuit. There is an advantage that power can be transmitted regardless of the frequency band (for example, a millimeter wave may be used). Although not shown, a power supply unit that wirelessly supplies power is provided with a transmission circuit that transmits radio waves in a certain frequency band from a power transmission element (for example, an antenna). The power receiving unit that receives power wirelessly from the power supply unit is provided with a rectifier circuit that rectifies radio waves received by a power receiving element (for example, an antenna). Although it depends on the transmission power, the reception voltage is small, and it is preferable to use a rectifier diode for the rectifier circuit that has a forward voltage as small as possible (for example, a Schottky diode). Rectification may be performed after a resonant circuit is configured in front of the rectifier circuit to increase the voltage. In the radio wave reception type for general outdoor use, the power transmission efficiency is low because most of the transmission power is diffused as radio waves, but the transmission range can be limited (for example, a confined millimeter wave signal transmission line) The problem can be solved by combining them.

  The electromagnetic induction type uses coil electromagnetic coupling and induced electromotive force. Although illustration is omitted, on the power transmission side, a primary coil is provided as a power transmission element, and a power supply unit that wirelessly supplies power drives the primary coil at a relatively high frequency. On the power receiving side, a secondary coil is provided as a power receiving element at a position facing the primary coil, and a rectifier diode, a resonance, a smoothing capacitor, and the like are provided in the power receiving unit that receives power wirelessly from the power supply unit. Provide. For example, a rectifier circuit is composed of a rectifier diode and a smoothing capacitor. When the primary coil is driven at a high frequency, an induced electromotive force is generated in the secondary coil that is electromagnetically coupled to the primary coil. Based on this induced electromotive force, a DC voltage is generated by a rectifier circuit. At this time, the power reception efficiency may be increased by utilizing a resonance phenomenon. When the electromagnetic induction type is adopted, the power supply unit and the power reception unit are brought close to each other, and other members (particularly metal) enter between them (specifically, between the primary coil and the secondary coil). And make sure that the coil is electromagnetically shielded. The former is for preventing the metal from being heated (by the principle of electromagnetic induction heating), and the latter is for countermeasures against electromagnetic interference to other electronic circuits. Electromagnetic induction type. Although the power that can be transmitted is large, it is necessary to make the transmission and reception close (for example, 1 centimeter or less) as described above.

  The resonance type uses a resonance phenomenon between two resonators (resonance elements) on the power transmission side and the power reception side, and is a power transmission resonator (power transmission element) provided in a power supply device that supplies power. (Resonance element) and coupling by resonance (resonance) of an electric field or a magnetic field between a power reception resonator (power reception resonance element) as a power reception element provided in a power reception device that receives power supplied from the power supply device This is a method of transmitting power by means of In other words, the resonance type applies the same principle as the phenomenon in which two vibrators (pendulum and tuning fork) resonate, and uses a resonance phenomenon in a near field of one of an electric field and a magnetic field instead of an electromagnetic wave. When one of the two vibrators with the same natural frequency (corresponding to the power supply unit) is vibrated, only a small vibration is transmitted to the other vibrator (corresponding to the power receiving unit). The phenomenon that begins to shake is used.

  Hereinafter, the method using the electric field resonance is described as an electric field resonance type, and the method using the magnetic field resonance is described as a magnetic field resonance type. Today, attention is focused on the “resonance type” using the resonance of electric field or magnetic field, which is advantageous in terms of efficiency, transmission distance, positional deviation and angular deviation, and in particular, the influence of energy absorption by organisms. A method called a magnetic resonance type or a magnetic resonance type that uses the resonance of a magnetic field with little (a loss of dielectric loss) is drawing attention.

  In the case of a method using the resonance phenomenon in an electric field, both a power supply unit (power transmission side) that supplies power wirelessly and a power reception unit (power reception side) that receives power wirelessly from the power supply unit have dielectric Place the body so that the electric field resonance phenomenon occurs between them. For the antenna, it is important to use a dielectric having a dielectric constant exceeding several tens to 100 (much higher than a general one) and having a dielectric loss as small as possible, and exciting a specific vibration mode to the antenna. Become. For example, when a disc antenna is used, the coupling is strongest when the vibration mode around the disc is m = 2 or 3.

  The resonance type of the electric field has a shorter power transmission distance and less heat generation than the magnetic field, but if there is an obstacle, loss due to electromagnetic waves increases. The magnetic resonance type is not affected by the electrostatic capacitance of a dielectric material such as a human, has little loss due to electromagnetic waves, and has a longer transmission distance than an electric field. In the case of the resonance type of the electric field, when using a frequency lower than the millimeter wave band, it is necessary to consider that the influence of the interference (EMI) with the signal used on the circuit board side is large, When using the millimeter wave band, it is necessary to consider interference between the signal and the millimeter wave signal transmission. In the case of a magnetic resonance type, basically, the outflow of energy by electromagnetic waves is small, and the wavelength can be made different from that of the millimeter wave band, so that it is free from interference problems between the circuit board side and millimeter wave signal transmission. The

  In the case of a method using a resonance phenomenon in a magnetic field, both the power supply unit (power transmission side) that supplies power wirelessly and the power reception unit (power reception side) that receives power wirelessly from the power supply unit include LC A resonator is arranged so that a magnetic field resonance phenomenon occurs between them. For example, a part of a loop antenna is formed into a capacitor shape, and an LC resonator is formed together with the inductance of the white loop. The Q value (resonance strength) can be increased, and the rate at which power is absorbed by other than the resonance antenna is small. Therefore, although it is similar to the electromagnetic induction type in that it uses a magnetic field, it can transmit several kW with the power supply unit and the power reception unit separated from the electromagnetic induction type. It is a completely different method.

  In the case of the resonance type, regardless of whether the resonance phenomenon of the electric field or the magnetic field is used, the wavelength λ of the electromagnetic field and the dimensions of the antenna component (the radius of the dielectric disk in the electric field and the radius of the loop in the magnetic field) The maximum distance that can be transmitted (distance D between antennas) is approximately proportional. In other words, it is important to keep the ratio of the wavelength λ of the electromagnetic wave having the same frequency as the vibration frequency, the antenna distance D, and the antenna radius r substantially constant. Further, since it is a resonance phenomenon in the near field, it is important that the wavelength λ is sufficiently larger than the inter-antenna distance D and the antenna radius r is not too smaller than the inter-antenna distance D.

  In this embodiment, as a method for realizing power transmission wirelessly, any of a radio wave reception type, an electromagnetic induction type, a resonance type and the like can be adopted, but it is preferable to adopt a method using an electromagnetic coil, and in particular, a resonance phenomenon or It is preferable to transmit power in a non-contact manner using a resonance phenomenon, and it is most effective to employ a resonance type. For example, the electromagnetic induction type power supply efficiency is maximum when the central axis of the primary coil and the central axis of the secondary coil coincide with each other. In other words, the alignment accuracy of the primary coil and the second coil greatly affects the power transmission efficiency. Although it depends on the type of electronic equipment, there is a difficulty in adopting the electromagnetic induction type in the case where the relative position between the power transmission side and the power reception side can vary. EMI (interference) needs to be considered in the radio wave reception type and the resonance type by an electric field. In that respect, the resonance type by the magnetic field is freed from these problems.

[Electronics]
In the electronic device of the present embodiment corresponding to the third aspect of the present invention and the fourth aspect of the present invention, one electronic device is configured with the device configuration in which each part is accommodated in one casing. In some cases, one electronic device as a whole may be configured by a combination of a plurality of devices (electronic devices). The transmission device of this embodiment is used in electronic devices such as a digital recording / reproducing device, a terrestrial television receiver, a mobile phone device, a game device, and a computer.

  When configuring a communication device, there are a case where only a transmission side is provided, a case where only a reception side is provided, and a case where both a transmission side and a reception side are provided. The communication devices on the transmission side and the reception side are coupled via a wireless signal transmission path (for example, a millimeter wave signal transmission path) and configured to perform signal transmission in the millimeter wave band. The signal to be transmitted is frequency-converted to a millimeter wave band suitable for broadband transmission and transmitted. However, in any case, a signal transmission apparatus is configured by a pair (pair) of a transmission-side communication apparatus and a reception-side communication apparatus.

  And between the communication apparatuses arrange | positioned comparatively at a short distance, after converting the signal of transmission object into a millimeter wave signal, this millimeter wave signal is transmitted via a millimeter wave signal transmission line. The term “wireless transmission” in the present embodiment means that a signal to be transmitted is transmitted wirelessly (preferably radio waves: millimeter waves in this example) instead of general electric wiring (simple wire wiring).

  “Relatively close” means that the distance is short compared to the distance between communication devices in the outdoors (outdoors) used in broadcasting and general wireless communication, and the transmission range is closed. Any material that can be substantially specified may be used. “Closed space” means a space where there is little leakage of radio waves from the inside of the space to the outside, and conversely, there is little arrival (intrusion) of radio waves from the outside to the inside of the space. The entire space is surrounded by a casing (case) that has a shielding effect against radio waves. For example, a plurality of electronic devices are integrated, such as inter-board communication within a housing of one electronic device, inter-chip communication on the same substrate, or a state in which the other electronic device is mounted on one electronic device. This corresponds to communication between devices in a connected state. The “integrated” is typically a state in which both electronic devices are completely in contact with each other, but it may be of a level that can be substantially specified as a space in which the transmission range between the two electronic devices is closed. For example, the case where both electronic devices are arranged at a predetermined position in a relatively short distance, such as within a few centimeters or within a few tens of centimeters, can be regarded as being “substantially” integral. In short, it suffices if there is little leakage of radio waves from the inside to the outside where radio waves composed of both electronic devices can propagate, and conversely, there is little arrival (intrusion) of radio waves from outside to the inside of the space.

  Hereinafter, signal transmission within a casing of one electronic device is referred to as signal transmission within the casing, and signal transmission in a state in which a plurality of electronic devices are integrated (hereinafter also including “substantially integrated”) is performed. This is called inter-signal transmission. In the case of signal transmission within the housing, the communication device on the transmission side (communication unit: transmission unit) and the communication device on the reception side (communication unit: reception unit) are accommodated in the same housing, and the communication unit (transmission unit and reception unit) A signal transmission device in which a wireless signal transmission path is formed therebetween can be an electronic device itself. On the other hand, in the case of signal transmission between devices, the communication device on the transmission side (communication unit: transmission unit) and the communication device on the reception side (communication unit: reception unit) are accommodated in different electronic device casings, and both electronic devices are A radio signal transmission path is formed between communication units (transmission unit and reception unit) in both electronic devices when they are arranged at a predetermined position and integrated with each other, thereby constructing a signal transmission device.

  In each communication device provided across a wireless signal transmission path, a transmission system and a reception system are paired and arranged. Two-way communication can be performed by causing each communication device to have both a transmission system and a reception system. When transmitting and receiving systems coexist in each communication device, signal transmission between one communication device and the other communication device may be one-way (one-way) or two-way. For example, when the first communication device is a transmission side and the second communication device is a reception side, a first communication unit that performs a transmission function is arranged in the first communication device and is received by the second communication device. A second communication unit having a function is arranged. When the second communication device is a transmission side and the first communication device is a reception side, a first communication unit that performs a transmission function is arranged in the second communication device, and the first communication device has a reception function. A second communication unit is arranged.

  The first communication unit having a transmission function is, for example, a signal generation unit on the transmission side that performs signal processing on a transmission target signal to generate a millimeter wave band electrical signal (the transmission target electrical signal is converted into a millimeter wave band electrical signal). And a transmission-side coupling unit that couples the millimeter-wave band electrical signal generated by the transmission-side signal generation unit to the millimeter-wave signal transmission channel that transmits the millimeter-wave band radio signal. Is provided in the transmission unit. Preferably, the signal generator on the transmission side is integrated with a functional unit that generates a signal to be transmitted.

  As the transmission line coupling unit, for example, an antenna structure including an antenna coupling unit, an antenna terminal, a microstrip line, an antenna, and the like is applied. A coupling point between the transmission path coupling unit and the wireless signal transmission path is a transmission point or a reception point. For example, the antenna coupling unit constitutes a transmission path coupling unit or a part thereof. The antenna coupling part means a part for coupling an electronic circuit in a semiconductor chip and an antenna arranged inside or outside the chip in a narrow sense, and in a broad sense, a signal is transmitted between a semiconductor chip and a radio signal transmission path. The part to be joined. For example, the antenna coupling unit includes at least an antenna structure. The antenna structure refers to a structure at a coupling portion with a wireless signal transmission path. For example, any antenna structure may be used as long as it converts electrical signals in the millimeter wave band into electromagnetic waves (radio waves) and couples them to the wireless signal transmission path. It doesn't mean.

  The radio signal transmission path may be configured as a free space transmission path that propagates through a space in the housing, for example. Preferably, it is composed of a waveguide structure such as a waveguide, a transmission line, a dielectric line, a dielectric body, etc., and has a characteristic of efficiently transmitting an electromagnetic wave in the millimeter wave band in a transmission line. It is desirable to do. For example, a dielectric transmission line including a dielectric material having a certain range of relative permittivity and a certain range of dielectric loss tangent may be used. For example, by filling the entire housing with a dielectric material, a dielectric transmission path is arranged instead of a free space transmission path between the transmission-side transmission path coupling section and the reception-side transmission path coupling section. . In addition, a dielectric line is formed by connecting the antenna of the transmission line coupling unit on the transmission side and the antenna of the transmission line coupling unit on the reception side with a dielectric line that is a linear member made of a dielectric material and having a certain wire diameter. A body transmission line may be configured. As a radio signal transmission path configured to confine radio waves (for example, millimeter wave signals) in the transmission path, in addition to the dielectric transmission path, the periphery of the transmission path may be surrounded by a shielding material and the inside may be a hollow waveguide. .

  For example, the signal generator on the transmission side has a modulation circuit, and the modulation circuit modulates a signal to be transmitted (baseband signal). The signal generator on the transmission side converts the frequency of the signal after being modulated by the modulation circuit to generate an electrical signal in the millimeter wave band. In principle, a signal to be transmitted may be directly converted into a millimeter wave band electrical signal. The transmission-side transmission path coupling unit converts the millimeter-wave band electrical signal generated by the transmission-side signal generation unit into a radio signal (electromagnetic wave, radio wave) and supplies it to the millimeter-wave signal transmission path as a radio signal transmission path To do.

  The modulation process may basically be any one that modulates at least one of amplitude, frequency, and phase with a signal to be transmitted, and any combination thereof may be employed. For example, analog modulation methods include amplitude modulation (AM) and vector modulation, for example. Vector modulation includes frequency modulation (FM) and phase modulation (PM). In the case of a digital modulation method, for example, amplitude transition modulation (ASK: Amplitude shift keying), frequency transition modulation (FSK: Frequency Shift Keying), phase transition modulation (PSK: Phase Shift Keying), amplitude phase for modulating amplitude and phase There is modulation (APSK: Amplitude Phase Shift Keying). As amplitude phase modulation, quadrature amplitude modulation (QAM: Quadrature Amplitude Modulation) is typical.

  For example, the second communication unit having the reception function receives a millimeter-wave band radio signal transmitted via a millimeter-wave signal transmission path as a radio signal transmission path and converts it into an electrical signal on the receiving side. And processing the millimeter-wave band electrical signal (input signal) received by the transmission-side coupling unit on the receiving side and converted into an electrical signal to perform a normal electrical signal (transmission target signal, base It is assumed that a reception-side signal generation unit (a signal conversion unit that converts a millimeter-wave signal into an electric signal to be transmitted) that generates (restores and reproduces) a band signal is provided. Preferably, the signal generation unit on the reception side is integrated with a function unit that receives a signal to be transmitted. For example, the signal generation unit on the receiving side has a demodulation circuit, generates an output signal by frequency-converting the millimeter-wave electrical signal, and then the demodulation circuit generates the signal to be transmitted by demodulating the output signal To do. In principle, a millimeter wave band electrical signal may be directly converted into a signal to be transmitted.

  As described above, in the present embodiment, when a signal interface is established, a signal to be transmitted is transmitted by a wireless signal without a contact or a cable (not transmitted by electrical wiring). Preferably, at least for signal transmission (especially a video signal or high-speed clock signal that requires high-speed transmission or large-capacity transmission), it is transmitted by a radio signal (preferably radio waves, not light) such as a millimeter wave band. In short, signal transmission that has been performed by electrical wiring in the past is performed by radio signals (radio waves) in this embodiment. By performing signal transmission with a radio signal in the millimeter wave band or the like, high-speed signal transmission in the order of gigabit per second [Gbps] can be realized, and the range covered by the radio signal can be easily limited. Can also be obtained.

  Here, in each transmission path coupling unit, the first communication unit and the second communication unit receive a radio signal (here, a radio signal in the millimeter wave band) via a radio signal transmission path (for example, a millimeter wave signal transmission path). Any device can be used as long as transmission is possible. For example, it may be provided with an antenna structure (antenna coupling portion), or may be coupled without an antenna structure. A wireless signal transmission path such as “millimeter wave signal transmission path for transmitting a millimeter wave signal” may be air (so-called free space), but preferably a wireless signal (electromagnetic wave, radio wave) is transmitted into the transmission path. What has a structure (wireless signal confinement structure, for example, millimeter wave confinement structure) which transmits a radio signal while confining is good. By actively using the radio signal confinement structure, it is possible to arbitrarily determine the routing of the radio signal transmission path, such as electrical wiring. As such a radio signal confinement structure, for example, a so-called waveguide is typically applicable, but it is not limited thereto. For example, a material made of a dielectric material capable of transmitting a wireless signal (referred to as a dielectric transmission line or a wireless signal dielectric transmission line), or a shielding material that constitutes a transmission line and suppresses external radiation of the wireless signal. Is preferably provided so as to surround the transmission line, and the inside of the shielding material is hollow. By giving flexibility to the dielectric material and the shielding material, the wireless signal transmission path can be routed. In the case of air (so-called free space), each transmission path coupling portion has an antenna structure, and signals are transmitted in a short-distance space by the antenna structure. On the other hand, when it is assumed that it is made of a dielectric material, an antenna structure can be taken, but this is not essential.

  In wireless signal transmission, signal multiplex communication may be performed by time division multiplexing or frequency division multiplexing. As signal multiplex communication, there are a mode in which a plurality of signals are transmitted in the same direction and a mode in which bidirectional communication is performed. For example, half-duplex bidirectional communication is performed by switching between transmission and reception by time division multiplexing. In this case, each of the signal processing units on the transmission side and the reception side has a switching unit that switches transmission / reception timing in a time division manner, and performs bidirectional transmission by half-duplex using a single radio signal transmission path. . Full-duplex bidirectional communication that performs simultaneous transmission and reception by frequency division multiplexing may be performed. In this case, the transmitting side and the receiving side differ in the frequency of the transmission radio signal and the frequency of the reception radio signal, and perform bidirectional transmission by full duplex using a single radio signal transmission path. Signal transmission may be performed by switching a plurality of systems of signals by time division multiplexing. In this case, the transmission side is provided with a multiplexing processing unit for transmitting a plurality of transmission target signals in one system by time division processing, and the reception side receives one system received via the radio signal transmission path. A unification processing unit is provided for dividing the wireless signal into each system. Multiple systems of signals may be transmitted simultaneously by frequency division multiplexing. In this case, the transmitting side is provided with a multiplexing processing unit for performing transmission on one system of wireless signal transmission paths by changing the frequency of the wireless signal for a plurality of transmission target signals, and the receiving side signal processing unit is provided with Provides a unification processing unit that divides one system of radio signals received via the radio signal transmission path into each system. Preferably, the signal processing unit corresponding to the transmission unit or the reception unit is disposed on the same substrate and disposed in the corresponding housing.

  Preferably, the transmission characteristics of the wireless signal transmission path between the transmission unit and the reception unit are known. Then, setting value processing for inputting a predetermined setting value for signal processing to the signal processing unit for at least one of the signal processing unit on the transmission side upstream of the transmission unit and the signal processing unit on the reception side subsequent to the reception unit It is good to have a part. For example, when the arrangement position of the transmission unit and the reception unit in one housing does not change (in the case of in-device communication), the transmission unit (and the signal processing unit on the transmission side) and the reception unit (and the signal processing unit on the reception side) ) Are placed in separate housings, but the placement positions of the transmitter and receiver when in use are predetermined (in the case of wireless transmission between devices at relatively short distances) ), The transmission characteristics between transmission and reception can be known in advance under an environment where the transmission conditions between transmission and reception do not substantially change (that is, are fixed).

  In an environment where transmission conditions between transmission and reception do not substantially change (that is, are fixed), even if the setting value that defines the operation of the signal processing unit is treated as a fixed value, that is, even if the parameter setting is fixed, The signal processing unit can be operated without inconvenience. Since the setting value for signal processing is set to a predetermined value (that is, a fixed value), it is not necessary to dynamically change the parameter setting, so that the parameter calculation circuit can be reduced and the power consumption can also be reduced. . In wireless transmission between devices or between devices at relatively short distances, the communication environment is fixed, so various circuit parameters that depend on the communication environment can be determined in advance, and in environments where the transmission conditions are fixed Even if the setting value that defines the operation of the signal processing unit is treated as a fixed value, that is, even if the parameter setting is fixed, the signal processing unit can be operated without any inconvenience. For example, by obtaining optimum parameters at the time of factory shipment and holding the parameters inside the apparatus, it is possible to reduce the parameter calculation circuit and power consumption. There are various signal processing parameter settings. For example, there are gain setting (signal amplitude setting) of the signal amplification circuit (amplitude adjustment unit), setting of a phase adjustment amount, setting of frequency characteristics, and the like. The gain setting is used for transmission power setting, reception level setting input to the demodulation function unit, automatic gain control (AGC), etc., and the phase adjustment amount is set by separately transmitting a carrier signal and a clock. This is used when the phase is adjusted in accordance with the delay amount of the transmission signal in the system, and the frequency characteristic setting is used when the amplitude of the low frequency component and the high frequency component is emphasized in advance on the transmission side. .

[Contrast between signal transmission by electric wiring and wireless transmission]
In signal transmission in which signal transmission is performed via electric wiring, there are the following problems.
i) Large capacity and high speed of transmission data are required, but there are limits to the transmission speed and capacity of electrical wiring.
ii) In order to cope with the problem of high-speed transmission data, there is a method of increasing the number of wires and reducing the transmission speed per signal line by parallelizing signals. However, this method leads to an increase in input / output terminals. As a result, complicated printed circuit boards and cable wiring, increased physical size of connectors and electrical interfaces, etc. are required, their shapes become complicated, their reliability decreases, and costs increase. Happens.
iii) With the increase in the amount of information such as movie images and computer images, the problem of EMC (electromagnetic compatibility) becomes more apparent as the band of the baseband signal becomes wider. For example, when electrical wiring is used, the wiring becomes an antenna, and a signal corresponding to the tuning frequency of the antenna is interfered. Also, reflections and resonances due to wiring impedance mismatch and the like also cause unnecessary radiation. In order to cope with such a problem, the configuration of the electronic device is complicated.
iv) In addition to EMC, if there is reflection, a transmission error due to interference between symbols on the receiving side or a transmission error due to jumping in interference will also become a problem.

  On the other hand, when signal transmission is performed wirelessly (for example, using a millimeter wave band) instead of electrical wiring, there is no need to worry about the wiring shape and connector position, so that there are not many restrictions on the layout. For signals replaced with signal transmission by millimeter waves, wiring and terminals can be omitted, which eliminates the problem of EMC. In general, there is no other functional unit that uses a millimeter-wave band frequency inside the communication device, so that EMC countermeasures can be easily realized. Wireless transmission is performed in a state in which the communication device on the transmission side and the communication device on the reception side are close to each other, and signal transmission is performed between fixed positions or in a known positional relationship.

1) It is easy to properly design a propagation channel (waveguide structure) between the transmission side and the reception side.
2) Higher reliability than free space transmission by designing the dielectric structure of the transmission line coupling part that seals the transmission side and the reception side and the propagation channel (waveguide structure of the millimeter wave signal transmission line) together Good transmission is possible.
3) Since the controller for managing the wireless transmission does not need to be dynamically and frequently controlled as in general wireless communication, the overhead due to control can be reduced as compared with general wireless communication. As a result, a set value (so-called parameter) used in a control circuit, an arithmetic circuit, or the like can be made a constant (so-called fixed value), and miniaturization, low power consumption, and high speed can be achieved. For example, if the wireless transmission characteristics are calibrated at the time of manufacture or design and the individual variations are grasped, the data can be referred to. Therefore, the setting values that define the operation of the signal processing unit can be preset or statically controlled. . Since the set value prescribes the operation of the signal processing unit appropriately, high-quality communication is possible while having a simple configuration and low power consumption.

Moreover, the following advantages can be obtained by using wireless communication in the millimeter-wave band with a short wavelength.
a) Since the millimeter wave communication can take a wide communication band, it is easy to increase the data rate.
b) The frequency used for transmission can be separated from the frequency of other baseband signal processing, and interference between the millimeter wave and the frequency of the baseband signal hardly occurs.
c) Since the millimeter wave band has a short wavelength, it is possible to reduce the size of an antenna or a waveguide structure depending on the wavelength. In addition, since the distance attenuation is large and the diffraction is small, electromagnetic shielding is easy to perform.
d) In normal outdoor wireless communication, the stability of a carrier wave has strict regulations to prevent interference and the like. In order to realize such a highly stable carrier wave, a highly stable external frequency reference component, a multiplier circuit, a PLL (phase locked loop circuit), and the like are used, which increases the circuit scale. However, millimeter waves can be easily shielded (especially when used in combination with signal transmission between fixed positions or with a known positional relationship) and can be prevented from leaking outside. In order to demodulate a signal transmitted by a carrier wave having a low stability with a small circuit on the receiving side, it is preferable to adopt an injection locking method.

  For example, LVDS (Low Voltage Differential Signaling) is known as a technique for realizing high-speed signal transmission between electronic devices arranged within a relatively short distance (for example, within a few tens of centimeters) or within an electronic device. However, with the recent increase in transmission data capacity and speed, there are problems such as increased power consumption, increased signal distortion due to reflection and the like, increased unwanted radiation (so-called EMI problem), and the like. For example, LVDS has reached its limit when signals such as video signals (including imaging signals) and computer images are transmitted at high speed (in real time) between devices or between devices.

  In order to support high-speed data transmission, the number of wires may be increased and the transmission speed per signal line may be reduced by parallelizing signals. However, this countermeasure leads to an increase in input / output terminals. As a result, it is required to increase the complexity of the printed circuit board and the cable wiring and to increase the semiconductor chip size. Also, so-called electromagnetic field interference becomes a problem when high-speed and large-capacity data is routed by wiring.

  Any problems in the LVDS or the method of increasing the number of wirings are caused by transmitting signals through electrical wiring. Therefore, as a technique for solving the problem caused by transmitting a signal through the electrical wiring, a technique of transmitting the electrical wiring wirelessly (particularly, a technique of performing signal transmission using radio waves) may be employed. As a technique for wirelessly transmitting electrical wiring, for example, signal transmission within the housing is performed wirelessly, and a UWB (Ultra Wide Band) communication system may be applied (referred to as a first technique), A carrier frequency in the short (1-10 millimeter) millimeter wave band may be used (denoted as the second technique). However, the UWB communication method of the first method has a problem in size such as a low carrier frequency, which is not suitable for high-speed communication for transmitting a video signal, for example, and an antenna becomes large. Further, since the frequency used for transmission is close to the frequency of other baseband signal processing, there is a problem that interference easily occurs between the radio signal and the baseband signal. Further, when the carrier frequency is low, it is easily affected by drive system noise in the device, and it is necessary to deal with it. On the other hand, when the carrier frequency in the millimeter wave band having a shorter wavelength is used as in the second method, problems of antenna size and interference can be solved.

  Here, the case where wireless communication is performed in the millimeter wave band has been described, but the application range is not limited to that in which communication is performed in the millimeter wave band. The same can be said when communication is applied in a frequency band below the millimeter wave band (centimeter wave band), or conversely, in a frequency band exceeding the millimeter wave band (sub millimeter wave band). However, it is effective to mainly use the millimeter wave band in which the wavelength is not excessively long or short in signal transmission within a casing or signal transmission between devices.

  Hereinafter, the transmission apparatus and the electronic apparatus of the present embodiment will be specifically described. As a most preferable example, an example in which many functional units are formed in a semiconductor integrated circuit (chip, for example, a CMOS IC) will be described, but this is not essential.

<Specific application examples>
Hereinafter, specific application examples will be shown. The transmission device is composed of the communication device on the transmission side and the communication device on the reception side. In the following description, a transmission device or an electronic device may be configured with a configuration in which each unit constituting the device is accommodated in one housing. The transmission device and the electronic device may be a single unit, or the transmission device and the electronic device may be entirely configured by a combination of a plurality of transmission devices and a plurality of electronic devices.

  1 to 2 are diagrams illustrating the first embodiment. Here, FIG. 1 is a circuit block diagram of the electronic device and the transmission device according to the first embodiment, and FIG. 2 is a diagram illustrating the operation of the electronic device and the transmission device according to the first embodiment.

  The first embodiment is the most basic configuration, and includes a communication device that wirelessly transmits data (especially high-speed data) and a power supply unit or a power reception unit that transmits power wirelessly (collectively, a non-contact power transmission device). Is mounted on the same unit. In the first embodiment, a one-to-one non-contact power transmission device is configured by arranging one power supply device corresponding to one power receiving side in one unit. Here, “one-to-one” means that there is one unit on the power supply side (specifically, its circuit board) and one unit on the power reception side (specifically, its circuit board). In this case, a one-to-one signal transmission device is configured by arranging one communication device in the power supply unit and one communication device in the power receiving unit. In other words, “one-to-one” here means that one communication device exists in the power supply unit (specifically, its circuit board), and one communication device also exists in the power reception unit (specifically, its circuit board). It means to do.

  In particular, the first embodiment drives a communication apparatus by supplying power (typically DC power) to one of two units including a contactless power transmission device by wire, while the other is a contactless power transmission. The power is transmitted at, and the communication device is driven. For example, the other unit rectifies AC power fed from one unit by non-contact power transmission into DC power, and this DC power is converted into a communication device on the transmission side or a communication device on the reception side (collectively data transmission / reception). Used to drive a device). This will be specifically described below.

  The electronic device 400A according to the first embodiment includes a first unit 410 and a second unit 420. The first unit 410 includes a power reception device 412, a reference signal generation unit 416, a first communication device 418, and an antenna 458. The power receiving device 412 includes a power receiving element 413 and a power receiving power supply unit 414. The power receiving element 413 has one terminal connected to a reference potential point (for example, grounded) and the other terminal connected to the power receiving power supply unit 414 and the reference signal generation unit 416. The first communication device 418 adopts a configuration of a communication unit that performs a transmission function when used as a transmission side, and adopts a configuration of a communication unit that performs a reception function when used as a reception side, and supports bidirectional communication. In this case, both the communication unit having a transmission function and the communication unit having a reception function are provided. Based on the power transmission signal Power received by the power receiving element 413, the reference signal generation unit 416 generates the reference signal CK_1 that is the source of the carrier signal that the first communication device 418 uses in the demodulation processing by the synchronous detection method. When the demodulation processing on the reception side does not employ the synchronous detection method, the first unit 410 may not include the reference signal generation unit 416.

  The second unit 420 includes a power supply device 422, a second communication device 428, and an antenna 478. The power supply device 422 includes a power transmission element 423 and a power supply unit 424. The power transmission element 423 has one terminal connected to a reference potential point (for example, grounded) and the other terminal connected to the power supply unit 424. The second communication device 428 adopts the configuration of the communication unit that performs the transmission function when the transmission side is used, and adopts the configuration of the communication unit that performs the reception function when the reception side is used, and supports two-way communication. In this case, both the communication unit having a transmission function and the communication unit having a reception function are provided.

  The power supply device 422 and the power reception device 412 constitute a contactless power transmission device 402, and the reference signal generation unit 416, the first communication device 418, and the second communication device 428 constitute a signal transmission device 408. The non-contact power transmission device 402 and the signal transmission device 408 constitute the transmission device 1, and the transmission device 1 is mounted on the electronic device 400A.

  A DC power source 404 that supplies a DC voltage DC_0 is connected to the second unit 420 (the power supply unit 424 and the second communication device 428), but a DC power source that supplies a DC voltage is connected to the first unit 410. Are not connected (see the X in the figure), and the first communication device 418 uses the DC voltage DC generated by the power receiving power supply unit 414 of the power receiving device 412. Note that the DC power supply 404 may be mounted on the second unit 420.

  If driving of the power transmission element 423 by the power supply unit 424 is stopped, the transmission of the power transmission signal Power to the power receiving element 413 is stopped, and the supply of the DC voltage DC to the first communication device 418 is also stopped. Therefore, on / off of the contactless power transmission and the operation of the first communication device 418 can be realized by turning on / off driving of the power transmission element 423 by the power supply unit 424.

  The power supply unit 424 of the power supply device 422 includes a clock generation circuit 425 configured by a crystal oscillation circuit or the like that generates a reference signal CK_2 (frequency fo) used by the second communication device 428, and the reference signal CK_2 Based on this, the power transmission element 423 is driven. Incidentally, the frequency fo of the power transmission signal Power is adjusted to the resonance frequency of the power receiving element 413 and the power transmitting element 423. In the second unit 420 on the power feeding side provided with the power supply device 422, both the power supply device 422 and the second communication device 428 perform processing in charge of each based on the same reference signal CK_2. A power transmission signal Power of a single carrier (frequency fo) is transmitted from the power transmitting element 423 to the power receiving element 413 (see FIG. 2A), and the second communication device 428 has a frequency f1 in synchronization with the reference signal CK_2. Communication processing is performed with the carrier signal.

  As the reference signal generation unit 416, a comparison circuit, a combination of a comparison circuit and a frequency divider circuit, a combination of a PLL (Phase Locked Loop) circuit and a DLL (Delay Locked Loop) circuit, etc. Various configurations can be employed. For example, the reference signal generation unit 416 includes a comparison circuit, and compares the AC signal received by the power receiving element 413 with a predetermined threshold level (for example, AC center: AC zero level) as illustrated in FIG. Thus, the reference signal CK_1 is generated. In this case, the frequency fo of the power transmission signal Power for non-contact power transmission becomes the frequency of the reference signal CK_1 for the second communication device 428 as it is. In effect, the power transmission signal Power (frequency fo) for power transmission itself is used as the reference signal CK_1 (frequency fo), and only the power supply device 422 that supplies power needs to have a clock generation circuit. Therefore, the circuit can be simplified. Further, it is easy to use the reference signals (reference signal CK_1 and reference signal CK_2) in a synchronized state on the data transmission side and the data reception side.

  As shown in FIG. 2A, the frequency of the power transmission signal Power for non-contact power transmission and the frequency (carrier frequency) of the carrier signal used for data wireless communication are preferably different. That is, non-contact power transmission and wireless data communication use different frequencies. In FIG. 2A, the frequency of AC power for contactless power transmission (power transmission signal Power: a single carrier) is fo, the carrier frequency for wireless data communication is fd, and its bandwidth is Wb. .

  By performing contactless power transmission and wireless data communication at different frequencies, it is possible to set an optimum frequency for contactless power transmission and an optimum frequency for wireless data communication. In other words, the problem of performing contactless power transmission and wireless data communication at the same frequency can be solved. For example, when contactless power transmission and wireless data communication are performed at the same frequency, a narrow band is required to increase power transmission efficiency, but this is difficult for high-rate communication and transmission signals are low-rate. It means you have to. Conversely, if the signal band (that is, the bandwidth Wb) is wide because of the high rate, the coupling between transmission and reception of non-contact power transmission becomes inefficient, and the power transmission efficiency is sacrificed. Such problems can be improved by performing non-contact power transmission and wireless data communication at different frequencies. Non-contact power transmission is performed by a single carrier power transmission signal Power having a frequency fo, and data transmission / reception can be performed at a higher frequency fd unlike the frequency fo in order to ensure a wide bandwidth for a high rate. . In terms of power transmission, a single carrier can be used to perform non-contact power transmission with a high Q. In other words, a wide band for data transmission is not necessary, so contactless power transmission is not necessary. The optimum frequency fo can be set by paying attention to high efficiency. In addition, by using a frequency fo different from data communication for non-contact power transmission, there is an advantage that interference such as noise caused by non-contact power transmission to data transmission is small (low noise).

  As the reference signal generation unit 416, various configurations such as a comparison circuit, a combination of a comparison circuit and a frequency divider circuit, and a combination of a PLL (Phase Locked Loop) circuit and a DLL (Delay Locked Loop) circuit can be employed. For example, as illustrated in FIG. 2B, the reference signal generation unit 416 includes a comparison circuit, and compares the AC signal received by the power receiving element 413 with a predetermined threshold level (for example, AC center: AC zero level). Thus, the reference signal CK_1 is generated. In this case, as shown in FIG. 2A, the frequency fo of the power transmission signal Power for non-contact power transmission becomes the frequency of the reference signal CK_1 for the second communication device 428 as it is. Since the power transmission signal Power (frequency fo) for power transmission itself is used as the reference signal CK_1 (frequency fo), and only the power supply device 422 supplying power has the clock circuit, the circuit can be simplified. Since the frequency of the reference signal CK_1 is reuse of the frequency fo for power transmission, it is advantageous in terms of frequency utilization. Further, the data transmission side and the reception side can use a reference signal in a synchronized state, and an advantage is obtained when the reception side performs synchronous detection (details will be described later).

  Note that a frequency dividing circuit (divider) that divides the output signal of the comparison circuit into M / N (M, N is an integer and M <N) is provided in the reference signal generation unit 416, and the output signal of the frequency dividing circuit is used as the reference signal. When used as CK_1, the frequency of the reference signal CK_1 is M / N times the frequency fo of the power transmission signal Power. Further, the carrier frequency fd for data transmission can be made N / M times the frequency fo of the power transmission signal Power by using the PLL circuit and the frequency dividing circuit together.

  3 to 4 are diagrams for explaining the second embodiment. Here, FIG. 3 is a circuit block diagram of the electronic device and the transmission device of the second embodiment, and FIG. 4 is a schematic diagram of an arrangement mode of units constituting the electronic device and the transmission device of the second embodiment.

  As can be understood from the comparison between FIG. 1 of the first embodiment and FIG. 3 of the second embodiment, the basic configuration of the electronic apparatus 400B of the second embodiment is the same as that of the electronic apparatus 400A of the first embodiment. In other words, Example 2 can be said to be more specific than Example 1. As the signal transmission device 408, an example in which the first communication device 418 is a transmission side and the second communication device 428 is a reception side is shown.

  The first communication device 418 includes a baseband signal amplification unit 434, a modulation function unit 440, a transmission amplification unit 450, an antenna 458 constituting a transmission path coupling unit, and a timing signal generation unit 460. The power receiving power supply unit 414, the reference signal generation unit 416, and the first communication device 418 are configured as a transmission chip TX that is a semiconductor integrated circuit (communication chip) on the transmission side. The power receiving element 413, the transmission chip TX, and the antenna 458 are mounted on the circuit board (or interposer) for the first unit 410 (see FIG. 4).

  A differential broadband signal (DATAin: 12-bit image signal, for example) to be wirelessly transmitted is supplied to the modulation function unit 440 via the baseband signal amplification unit 434. In order to clearly indicate that the signal is a differential signal, in the figure, the signal lines are indicated by “+” and “−” symbols.

  The modulation function unit 440 may employ various circuit configurations depending on the modulation method. For example, in the case of a method that modulates amplitude or phase, a frequency mixing unit 442 (Mix: mixer circuit) and a transmission-side local oscillation unit 444 are used. A configuration including the above may be employed. The figure shows the case where the ASK modulation method is adopted. The transmission-side local oscillation unit 444 may employ either a voltage controlled oscillation circuit (VCO: Voltage Controlled Oscillator) or a current controlled oscillation circuit (CCO; Current Controlled Oscillator). In the following description, it is assumed that a voltage controlled oscillation circuit is employed unless otherwise specified.

  Regardless of whether the transmission-side local oscillation unit 444 has a VCO configuration or a CCO configuration, in consideration of modulating a differential signal, for example, the oscillator component includes two transistors (for example, a field effect transistor). ) May be used for the differential circuit. Although not shown, for example, the control input terminal (gate) of one transistor is set as a non-inverted input (Vin +), and one of its main electrode terminals (drain or source) is connected to a power source through a resistance element, and the main electrode terminal One of these is the inverted output (Vout−). In addition, the control input terminal (gate) of the other transistor is set as an inverting input (Vin−), one of the main electrode terminals (drain or source) is connected to a power source through a resistance element, and one of the main electrode terminals is connected Non-inverted output (Vout +). The other of the main electrode ends of the transistors is connected in common and connected to a reference potential (for example, ground potential) through a current value variable type current source. The oscillation frequency is controlled by controlling the bias current of the differential circuit with a current source of variable current value type. In order to clearly indicate that the modulation carrier signal emitted from the transmission-side local oscillation unit 444 is a differential signal, in the figure, “+” and “+” are applied to the signal line from the transmission-side local oscillation unit 444 to the frequency mixing unit 442. Shown with the symbol “-”.

  The timing signal generation unit 460 generates a timing signal to be used by the modulation function unit 440, the previous circuit of the baseband signal amplification unit 434, and the like. The timing signal generation unit 460 may be any circuit as long as it can generate various timing signals, and may employ various circuit configurations. For example, the timing signal generation unit 460 is preferably configured by a PLL, a DLL, or the like. In the following, description will be given in the case of a PLL.

  The timing signal generation unit 460 is configured to use the transmission-side local oscillation unit 444 of the first communication device 418 as an oscillation circuit, and includes a frequency division unit 462 (DIV), a phase frequency comparison unit 464 (PFD), A loop filter unit 468 (LPF), and the reference signal generation unit 416 is used as a reference signal generation unit. As indicated by a broken line in the figure, a charge pump unit 466 may be provided between the phase frequency comparison unit 464 and the loop filter unit 468 as necessary (depending on the circuit configuration). Hereinafter, the case where the charge pump unit 466 is also provided will be described.

  The frequency divider 462 may be provided as necessary (when a multiplication function for differentiating the power transmission signal Power and the data transmission carrier frequency is required) from the output terminal of the transmission-side local oscillation unit 444. The oscillation frequency (= carrier frequency fd) of the output oscillation signal Vout that has been output is divided by 1 / α (M = 1, N = α) to obtain the divided oscillation signal Vdev and supplied to the phase frequency comparison unit 464. . α is a PLL multiplication number (also referred to as a frequency division ratio), which is a positive integer of 1 or more, and can change the frequency of the output oscillation signal Vout (carrier signal for modulation) that is a PLL output clock. It should be variable. Since the timing signal generation unit 460 has a PLL configuration, the multiplication function can be realized by including the frequency-dividing unit 462 with a simple configuration, and there is an advantage that the circuit scale can be further reduced.

  The phase frequency comparison unit 464 has the phase and frequency of the divided oscillation signal Vdev obtained by dividing the reference signal CK_1 supplied from the reference signal generation unit 416 and the output oscillation signal Vout from the transmission side local oscillation unit 444 by the frequency division unit 462. And an error signal indicating a phase difference and a frequency difference as a comparison result is output as a pulse width modulated UP / DOWN signal.

  The charge pump unit 466 inputs and outputs a drive current (referred to as a charge pump current Icp) corresponding to the UP / DOWN signal output from the phase frequency comparison unit 464. The charge pump unit 466 includes, for example, a charge pump that inputs and outputs the charge pump current Icp output from the phase frequency comparison unit 464, and a current value variable type current source that supplies the bias current Icpbias to the charge pump. Is done.

  The loop filter unit 468 is an example of a smoothing unit that smoothes the comparison signal output from the phase frequency comparison unit 464 via the charge pump unit 466. The loop filter unit 468 is, for example, a low-pass filter, and integrates the charge pump current Icp generated by the charge pump unit 466 to generate a loop filter output current Ilp for controlling the oscillation frequency of the transmission-side local oscillation unit 444. To do. The loop filter output current Ilp is used as an oscillation control signal for the transmission side local oscillation unit 444.

  Although not shown, the loop filter unit 468 specifically includes a capacitor (capacitance element) having a loop filter capacitance Cp. Note that not only the capacitor but also the resistance element of the loop filter resistor Rp may be connected in series to improve the loop stability. When adopting a configuration including one charge pump, a configuration including this resistance element is usually employed.

  In the loop filter unit 468, a voltage signal (referred to as a charge pump voltage Vcp) is generated at one terminal of the loop filter (that is, the input of the voltage / current converter) based on the charge pump current Icp output from the charge pump. Since the capacitor is charged and discharged, the loop filter unit 468 attenuates a frequency component equal to or higher than a predetermined cut-off frequency (also referred to as roll-off frequency or pole) of the comparison result signal from the phase frequency comparison unit 464, It functions as a low-pass filter that exhibits at least one cut-off frequency so as to smooth the oscillation control voltage supplied to the transmission-side local oscillation unit 444.

  The carrier signal for modulation having the carrier frequency fd output from the transmission-side local oscillator 444 of the modulation function unit 440 is frequency-divided by 1 / α by the frequency divider 462 and supplied to the phase frequency comparator 464. The timing signal generation unit 460 is used together with the phase frequency comparison unit 464, the charge pump unit 466, and the loop filter unit 468 so that the operation clock having a frequency of fd / α is frequency-phase synchronized with the reference signal CK_1 from the reference signal generation unit 416. A PLL circuit is configured.

  The power supply unit 424 includes a clock generation circuit 425 including a crystal oscillation circuit (XTAL) that generates a reference signal CK_2 (frequency fo) used by the second communication device 428, and a power transmission element 423 based on the reference signal CK_2. A driving circuit 426 for driving. The power transmission element 423 has one terminal connected to a reference potential point (for example, grounded) and the other terminal connected to the drive circuit 426.

  The second communication device 428 includes a demodulation function unit 470, an antenna 478 constituting a transmission path coupling unit, a reception amplification unit 482, a baseband signal amplification unit 484, and a timing signal generation unit 490. A variable gain type low noise amplifier (LNA) may be used as the reception amplification unit 482. The drive circuit 426 and the second communication device 428 of the power supply unit 424 are configured as a reception chip RX that is a reception-side semiconductor integrated circuit (communication chip). The power transmitting element 423, the receiving chip RX, and the antenna 478 are mounted on the circuit board (or interposer) for the second unit 420 (see FIG. 4).

  For example, a wireless signal in the millimeter wave band for data transmission transmitted from the antenna 458 of the first communication device 418 is received by the antenna 478 and supplied to the demodulation function unit 470. The demodulation function unit 470 can employ various circuit configurations in a range corresponding to the modulation method on the transmission side, but here the amplitude and phase are modulated so as to correspond to the above description of the modulation function unit 440. This will be described in the case of the method.

  The demodulation function unit 470 includes a two-input type frequency mixing unit 472 (mixer circuit), and has a square detection circuit that obtains a detection output proportional to the square of the amplitude of the received millimeter wave signal (envelope), and does not have a square characteristic. Signal demodulation is performed by a simple envelope detection circuit or a synchronous detection method. Preferably, a synchronous detection method considering synchronization with the reference signal CK_1 is adopted. The figure shows a case where a synchronous detection method considering synchronization with the reference signal CK_1 is adopted. When using the synchronous detection method, the demodulation function unit 470 includes a reception-side local oscillation unit 474, generates a demodulation carrier wave at the reception-side local oscillation unit 474, and performs demodulation using the carrier wave. As with the transmission-side local oscillation unit 444, the reception-side local oscillation unit 474 may employ either a voltage-controlled oscillation circuit (VCO) or a current-controlled oscillation circuit (CCO). In the following description, it is assumed that a voltage controlled oscillation circuit is employed unless otherwise specified. In order to clearly indicate that the demodulation carrier signal emitted from the reception-side local oscillation unit 474 is a differential signal, in the drawing, “+” and “+” are connected to the signal line from the reception-side local oscillation unit 474 to the frequency mixing unit 472. Shown with the symbol “-”.

  In communication using synchronous detection, the carrier signal on the transmission side and the carrier signal on the reception side must be synchronized in frequency and phase. For this purpose, a timing signal generator 490 is provided. The timing signal generation unit 490 generates a timing signal to be used in the demodulation function unit 470, the subsequent circuit of the baseband signal amplification unit 484, and the like. The timing signal generation unit 490 may be any circuit configuration as long as it can generate various timing signals in the same manner as the timing signal generation unit 460, and may employ various circuit configurations. For example, the timing signal generation unit 490 is preferably configured by a PLL, a DLL, or the like. It is. In the following, description will be given in the case of a PLL.

  The timing signal generation unit 490 is configured to use the reception-side local oscillation unit 474 of the second communication device 428 as an oscillation circuit, and includes a frequency division unit 492 (DIV), a phase frequency comparison unit 494 (PFD), A loop filter unit 498 (LPF), and a clock generation circuit 425 of the power supply unit 424 is used as a reference signal generation unit. As indicated by a broken line in the figure, a charge pump unit 496 may be provided between the phase frequency comparison unit 494 and the loop filter unit 498 as necessary (depending on the circuit configuration). In relation to the timing signal generation unit 460, the frequency dividing unit 492 is a frequency dividing unit 462, the phase frequency comparing unit 494 is a phase frequency comparing unit 464, the charge pump unit 496 is a charge pump unit 466, and the loop filter unit 498 is a loop filter unit. 468 respectively.

  The configuration and operation of the timing signal generator 490 are basically the same as those of the timing signal generator 460. For example, the phase frequency comparison unit 494 divides the reference signal CK_2 supplied from the clock generation circuit 425 and the output oscillation signal Vout (demodulation carrier signal) from the reception-side local oscillation unit 474 by the frequency division unit 492. Compare the phase and frequency of the peripheral oscillation signal. A signal indicating the comparison result passes through the charge pump unit 496 and the loop filter unit 498, so that a control signal to the reception-side local oscillation unit 474 is generated. At this time, the demodulation carrier signal of the carrier frequency fd output from the reception-side local oscillation unit 474 of the demodulation function unit 470 is frequency-divided to 1 / α by the frequency division unit 492 and supplied to the phase frequency comparison unit 494. The The timing signal generation unit 490 performs a PLL together with the phase frequency comparison unit 494, the charge pump unit 496, and the loop filter unit 498 so that the operation clock having the frequency fd / α is frequency-phase synchronized with the reference signal CK_2 from the clock generation circuit 425. The circuit is configured.

  The received signal received by the antenna 478 is input to a variable gain type and low noise type reception amplifying unit 482 (LNA), amplitude adjustment is performed, and then supplied to the demodulation function unit 470. The received signal whose amplitude has been adjusted is input to the frequency mixing unit 472, a multiplication signal is generated by the frequency mixing unit 472 by synchronous detection, and a high-frequency component is removed by a low-pass filter of a filter processing unit (not shown). A waveform (baseband signal, DATAout) of the input signal sent from the transmission side is generated and output via the baseband signal amplification unit 484. At this time, the demodulated differential wideband signal (DATAout: 12-bit image signal, for example) is supplied to the subsequent circuit via the baseband signal amplifying unit 484. In order to clearly indicate that the signal is a differential signal, in the figure, the signal lines are indicated by “+” and “−” symbols.

  The drive circuit 426 of the power supply unit 424 of the second unit 420 and each unit of the second communication device 428 (in the figure, the reception amplification unit 482, the baseband signal amplification unit 484, the frequency mixing unit 472, the reception side local oscillation unit 474, the frequency division) The DC power supply 404 that supplies the DC voltage DC_0 is connected to the unit 492, the phase frequency comparison unit 494, and the charge pump unit 496). In contrast, the first unit 410 is not connected to a DC power supply that supplies the DC voltage DC_0, and the DC voltage DC generated by the power receiving power supply unit 414 of the power receiving device 412 is used as the reference signal generating unit 416 and the first unit 410. Each part of one communication apparatus 418 (in the figure, a baseband signal amplification unit 434, a transmission amplification unit 450, a frequency mixing unit 442, a transmission side local oscillation unit 444, a frequency division unit 462, a phase frequency comparison unit 464, and a charge pump unit 466) It is configured to use.

  As shown in FIG. 4, each of the power receiving element 413 and the power transmitting element 423 is formed into a coil shape by spirally winding a conductor pattern in the vicinity of the peripheral edge on the circuit board 411 or the circuit board 421 to form a conductor pattern coil. Both conductor pattern coils are made to face each other. When the non-contact power transmission apparatus 402 is configured as an electromagnetic induction type, a transformer (referred to as a conductor pattern transformer) is configured by both conductor pattern coils of the power receiving element 413 and the power transmitting element 423. When the non-contact power transmission device 402 is configured by a magnetic resonance type, the power receiving element 413 corresponds to the power receiving element, the power transmitting element 423 corresponds to the power transmitting element, and the power receiving element 413 (power receiving element) and the power transmitting element 423 (power transmitting element). And the two conductor pattern coils function as a helical antenna or a spiral resonator. The power receiving element 413 (power receiving element) and the power transmitting element 423 (power transmitting element) both have an inductance component L and a capacitance component C due to the conductor pattern coil, and are self-resonant based on a known relational expression (1 / √L · C). The frequency (ωo, fo = ωo / 2π) is specified.

  In the second unit 420, a clock generation circuit 425, a reception chip RX, and an antenna 478 are arranged on the inner periphery of the power transmission element 423 (conductor pattern coil) on the circuit board 421. In the first unit 410, the transmission chip TX and the antenna 458 are arranged on the inner periphery of the power receiving element 413 (conductor pattern coil) on the circuit board 411. A DC power source 404 that supplies DC voltage DC_0 is connected to the receiving chip RX of the second unit 420, but a DC power source that supplies DC voltage is not connected to the transmitting chip TX of the first unit 410, By the non-contact power transmission by the conductor pattern coil, the power transmission signal Power from the power transmission element 423 is received by the power reception element 413 to generate the DC voltage DC and used by the transmission chip TX. Further, when high-speed data transmission / reception in the millimeter wave band is performed between the on-board antennas (antenna 458 and antenna 478), the reference signal CK_1 for the transmission chip TX is generated based on the power transmission signal Power for non-contact power transmission. Thus, substantially the power transmission signal Power itself is used as a reference signal for the transmission chip TX. As a result, the first unit 410 on the power receiving side (in this example, the transmitting side) does not have to be provided with a DC power supply, and further, it is not necessary to mount a crystal oscillator or the like for generating a reference signal. The unit 410 can use a simple and low-cost circuit (for example, a comparison circuit) as a circuit for generating the reference signal.

  Incidentally, the circuit board 411 is sandwiched between the antenna 458 and the antenna 478, or between the power transmission element 423 and the power reception element 413. However, since it is a dielectric material, non-contact power transmission and wireless in the millimeter wave band are performed. There is little impact on transmission.

  Other than the components shown in FIG. 3, no special mechanism for frequency synchronization is required, communication by synchronous detection can be performed, and the circuit configuration can be simplified. Since it is not necessary to use separate crystal oscillators for the transmitting side and the receiving side, various advantages are obtained. By supplying reference signals (in this example, reference signal CK_1 and reference signal CK_2) to each location, and performing modulation and demodulation processes based on each reference signal, interference, noise, signal distortion, unnecessary radiation, and usable frequencies Can solve such problems. For example, even when frequency division multiplexing is applied as the signal transmission device 408, a plurality of transmission carrier signals having different frequencies are generated based on the reference signal CK_1, and based on the reference signal CK_2 having the same frequency as the reference signal CK_1. A plurality of carrier signals for reception having different frequencies can be generated, and it is easy to synchronize each carrier signal. As a result, each signal transmission is realized without being affected by interference. For example, when receiving a transmission signal of the carrier frequency fd2 and performing synchronous detection, even if a transmission signal of the carrier frequency fd1 having a frequency different from that of the carrier frequency fd2 arrives and is received, the interference of the component of the carrier frequency fd1 occurs. It will not be affected.

  Although not shown, at least one of the first unit 410 and the second unit 420 is further provided with a predetermined setting value for signal processing in the signal processing unit (in this example, the power receiving device 412, the first communication device 418, It is preferable to include a set value processing unit that inputs to the power supply device 422 and the second communication device 428). The signal processing unit performs predetermined signal processing based on the set value. The set value processing unit inputs a predetermined set value for signal processing to the signal processing unit. Examples of the signal processing parameter setting include gain setting of an amplifier circuit (in this example, the transmission amplification unit 450 and the reception amplification unit 482). For example, although the power consumption is large when the transmission output level is large, the power consumption can be reduced by lowering the transmission output level so that the reception level is not too high or too low. In addition, by making the output level of the transmission amplifying unit 450 (in other words, the input level to the demodulation function unit 470) an appropriate value, the demodulation function unit 470 does not depend on the reception level at the antenna 478. Proper demodulation processing can be performed.

  The setting value corresponding to the transmission characteristics and the signal transmission within the device or between the devices are not limited, and include, for example, parameter setting for correcting the variation of the circuit element. Preferably, the setting value processing unit is the transmission unit. It is preferable to input a preset value for signal processing corresponding to the transmission characteristics between the receiver and the receiving unit to the signal processing unit. In an environment where transmission conditions between transmission and reception do not substantially change (that is, are fixed), even if the setting value that defines the operation of the signal processing unit is treated as a fixed value, that is, even if the parameter setting is fixed, The signal processing unit can be operated without inconvenience. Since the setting value for signal processing is set to a predetermined value (that is, a fixed value), it is not necessary to dynamically change the parameter setting, so that the parameter calculation circuit can be reduced and the power consumption can also be reduced. . In wireless transmission between devices or between devices at relatively short distances, the communication environment is fixed, so various circuit parameters that depend on the communication environment can be determined in advance, and in environments where the transmission conditions are fixed Even if the setting value that defines the operation of the signal processing unit is treated as a fixed value, that is, even if the parameter setting is fixed, the signal processing unit can be operated without any inconvenience. For example, by obtaining optimum parameters at the time of factory shipment and holding the parameters inside the apparatus, it is possible to reduce the parameter arithmetic circuit and power consumption.

  When the various circuit parameters are determined in advance, either the first method that is automatically generated in the device or the second method that uses the one generated outside the wireless transmission device (or electronic device) is used. It can be taken. When taking the first method, the set value processing unit includes a set value determining unit for determining a set value, a storage unit for storing the set value determined by the set value determining unit, and a set value read from the storage unit And an operation control unit for operating the signal processing unit based on the above. When taking the second method, the setting value processing unit includes a setting value receiving unit that receives the setting value from the outside, a storage unit that stores the setting value received by the setting value receiving unit, and a setting read from the storage unit It is preferable to have an operation control unit that operates the signal processing unit based on the value.

[Modification of Example 1 and Example 2]
In the first embodiment and the second embodiment, one (ie, singular) first unit 410 and one (ie, singular) second unit 420 are provided in order to have one non-contact power transmission system. This is not limited to this. For example, there may be one unit in which the power supply device 422 is arranged, and a plurality of units in which the power receiving devices 412 that use the same frequency as the power supply device 422 are arranged. That is, it is sufficient that there is one set of the power reception device 412 and the power supply device 422 that use the same frequency, and a plurality of power reception devices 412 may exist for one power supply device 422. Since it is not necessary to provide a power transmission element 423 for each of the plurality of power receiving apparatuses 412, the configuration is simplified. For example, although not shown, in the second embodiment, the number of the first units 410 is set to a plurality, and the upper layer of the second unit 420 shown in FIG. 6 (or between the first unit 410 and the second unit 420 in the figure). In addition, another first unit 410 may be arranged. Or you may arrange | position the electric power receiving apparatus 412 to each of the front and back of one circuit board. The power transmission signal Power from the power supply device 422 of the power supply unit (second unit 420 in this example) is simultaneously received by the plurality of power reception devices 412 on the power reception side, and the first corresponding to each power reception device 412 is received. A direct current voltage DC used in the communication device 418 is generated separately. However, unlike Example 3 described later, each power receiving device 412 on the power receiving side operates in accordance with the frequency used by one power supply device 422, and therefore cannot have the selectivity of the data transmitting / receiving device. (Refer to the system of frequency fo_2 in Example 5 described later).

  5 to 6 are diagrams for explaining the third embodiment. Here, FIG. 5 is a circuit block diagram of the electronic device and the transmission device according to the third embodiment, and FIG. 6 is a diagram illustrating the operation of the electronic device and the transmission device according to the third embodiment. FIG. 5 shows a modification to the first embodiment, but the same modification can be made to the second embodiment that is a more specific example of the first embodiment.

  The third embodiment is characterized in that a plurality of non-contact power transmission systems are provided. More preferably, a plurality of data transmission / reception systems are prepared by providing a communication device that operates based on the power received by the power receiving device 412 in each of the systems on the power receiving side of the plurality of contactless power transmissions. Although a plurality of non-contact power transmission systems and a plurality of data transmission / reception systems are prepared, the fourth embodiment is the same as the fourth embodiment to be described later, but the data transmission is different from the fourth embodiment in that frequency division multiplexing is not applied. .

  More preferably, in the first embodiment, a plurality of power supply devices 422 (a power transmission element 423 and a power supply power supply unit 424) corresponding to each of a plurality of power reception sides are arranged in one unit, thereby allowing one-to-many non- A contact power transmission device is configured. Here, “one-to-many” means that there is one unit on the power supply side and a plurality of units on the power reception side. In this case, a one-to-many signal transmission device is configured by arranging one communication device in the power supply unit. Here, “one-to-many” means that one communication device exists in the power supply side unit (specifically, its circuit board), and there is a communication device in each of the multiple units (specifically, its circuit board) on the power receiving side. It means to do.

  Each system of non-contact power transmission can have the selectivity of the data transmission / reception device by turning on / off the power supply for each system (that is, selecting the power transmission destination). Depending on the arrangement form of the power receiving element and the power transmitting element, the frequency of each power transmission signal Power is preferably different so that each system does not interfere. Hereinafter, the differences from the first embodiment and the second embodiment will be specifically described. Note that the same reference numerals are given to functional units that are the same as or equivalent to those in the first and second embodiments.

  The electronic apparatus 400C according to the third embodiment includes two first units 410_1, a first unit 410_2, and a second unit 420. The second unit 420 is equipped with a DC power supply 404 that supplies a DC voltage DC_0, but the first unit 410_1 and the first unit 410_2 are not connected to a DC power supply that supplies a DC voltage, Power is supplied from the unit 420 by non-contact power transmission. Specifically, the second unit 420 includes a power supply device 422_1 for the first unit 410_1 having a power transmission element 423_1 and a power supply unit 424_1, and a first unit 410_2 having a power transmission element 423_2 and a power supply unit 424_2. Power supply device 422_2 and a second communication device 428. The second communication device 428 is supplied with the reference signal CK_21 from the clock generation circuit 425_1 of the power supply unit 424_1 and is supplied with the reference signal CK_22 from the clock generation circuit 425_2 of the power supply unit 424_2.

  The DC power supply 404 is connected to the second communication device 428, the power supply unit 424_1 of the power supply device 422_1, and the power supply unit 424_2 of the power supply device 422_2. The second communication device 428 and the first communication device 418_1 constitute a first transmission / reception pair, and the second communication device 428 and the first communication device 418_2 constitute a second transmission / reception pair. Although there are a plurality of transmission / reception pairs, the transmission side or the reception side is used as a plurality of transmission / reception pairs.

  The first communication device 418_1 uses the DC voltage DC_1 by receiving the power transmission signal Power_1 of the frequency fo_1 transmitted from the power transmission element 423_1 by the power receiving element 413_1. When performing high-speed data transmission / reception in the millimeter wave band between the antenna 458_1 and the antenna 478, the reference signal CK_11 for the first communication device 418_1 is generated based on the power transmission signal Power_1 for non-contact power transmission, The power transmission signal Power_1 itself is substantially used as a reference signal for the first communication device 418_1. The first communication device 418_1 generates a carrier signal having a frequency fd_1 (≠ fo_1) based on the reference signal CK_11 generated by the reference signal generation unit 416_1.

  The first communication device 418_2 generates the DC voltage DC_2 by receiving the power transmission signal Power_2 having the frequency fo_2 (≠ fo_1) transmitted from the power transmission element 423_2 by the power receiving element 413_2. The values of the DC voltage DC_1 and the DC voltage DC_2 are not necessarily the same and may be different. When performing high-speed data transmission / reception between the antenna 458_2 and the antenna 478 in the millimeter wave band, by generating the reference signal CK_12 for the first communication device 418_2 based on the power transmission signal Power_2 for non-contact power transmission, The power transmission signal Power_2 itself is substantially used as a reference signal for the first communication device 418_2. The first communication device 418_2 generates a carrier signal having a frequency fd_2 (≠ fo_2) based on the reference signal CK_12 generated by the reference signal generation unit 416_2. As an example, fo_1 <fo_2 <fd_1 = fd_2 as shown in FIG. 6A, or fo_1 <fo_2 <fd_1 = fd_2 as shown in FIG. 6B. In the third embodiment, as shown in FIG. 6B, the bandwidth Wb_1 centered on the carrier frequency fd_1 and the bandwidth Wb_2 centered on the carrier frequency fd_2 may overlap.

  As described above, the first unit 410_1 and the first unit 410_2 do not have to be provided with a DC power supply, and further, it is not necessary to mount a crystal oscillator or the like for generating a reference signal. In the third embodiment, as in the first and second embodiments, non-contact power transmission and wireless data communication are performed at different frequencies, so that an optimum frequency for non-contact power transmission is set and wireless data communication is performed. An optimum frequency can be set. Each data transmission / reception device can be contactless, and a plurality of types of power supply voltages and a plurality of types of clock signals can be transmitted in a contactless manner, thereby enabling various power transmissions and various clock transmissions.

  Further, as an advantage unique to the third embodiment, by turning on / off power transmission in a plurality of non-contact power transmission systems separately, that is, by enabling selection of a non-contact power transmission device of each system, The selectivity of the data transmitting / receiving device can be provided. That is, by turning on / off the transmission of the power transmission signal Power_1 and the transmission of the power transmission signal Power_2, only one of the first communication device 418_1 and the first communication device 418_2 is operated or the first communication device. The operations of the first communication device 418_1 and the first communication device 418_2 can be controlled separately, such as operating both the 418_1 and the first communication device 418_2. Each of the plurality of non-contact power transmission systems can be turned on / off individually by controlling on / off of driving of the corresponding power transmission element 423 by each power supply unit 424.

  For example, the case where the second communication device 428 is the transmission side and the first communication device 418_1 and the first communication device 418_2 are the reception side is as follows. By setting frequency fd_1 = frequency fd_2, broadcast communication can be performed when both the first communication device 418_1 and the first communication device 418_2 are operated. When frequency fd_1 = frequency fd_2, by operating only one of the first communication device 418_1 and the first communication device 418_2, the first communication device 418_1 and one of the first communication device 418_2 and the second communication device 428 are operated. Data transmission can be performed only with. When frequency fd_1 ≠ frequency fd_2, only one of the first communication device 418_1 and the first communication device 418_2 is operated, and the second communication device 428 selects and uses one of the frequency fd_1 and the frequency fd_2. Thus, data transmission can be performed only between one of the first communication device 418_1 and the first communication device 418_2 and the second communication device 428.

  The case where the second communication device 428 becomes the reception side and the first communication device 418_1 and the first communication device 418_2 become the transmission side is as follows. If the frequency fd_1 is not equal to the frequency fd_2 and the second communication device 428 selects and uses one of the frequency fd_1 and the frequency fd_2, the first communication device 418_1 and the first communication device 418_2 can be operated at the same time. Data transmission can be performed only between one of the communication device 418_1 and the first communication device 418_2 and the second communication device 428. When frequency fd_1 = frequency fd_2 is set and both the first communication device 418_1 and the first communication device 418_2 are operated simultaneously, the second communication device 428 generates a radio wave from the first communication device 418_1 and a radio wave from the first communication device 418_2. Time division multiplexing is applied because it cannot be classified and interference occurs.

  FIG. 7 is a diagram for explaining the fourth embodiment. Here, FIG. 7 is a circuit block diagram of the electronic apparatus and the transmission apparatus according to the fourth embodiment.

  The fourth embodiment is characterized in that a plurality of non-contact power transmission systems and a plurality of data transmission / reception systems are prepared, and frequency division multiplexing is applied in data transmission. As in the third embodiment, a plurality of power supply devices 422 (a power transmission element 423 and a power supply power supply unit 424 corresponding to each of a plurality of power reception sides in one unit are provided on a power supply side that transmits a power transmission signal to a plurality of power reception sides. ) To form a one-to-many non-contact power transmission apparatus. In order to facilitate the application of frequency division multiplexing, by providing a plurality of communication devices corresponding to each of the communication devices corresponding to each of the plurality of power receiving sides on the power feeding side that transmits the power transmission signal to the plurality of power receiving sides, A many-to-many signal transmission apparatus is configured. Here, “many-to-many” means that there are multiple communication devices in the power supply unit, and there are communication devices in each of the multiple units on the power receiving side so as to be paired with the multiple communication devices. Means. Hereinafter, the difference from the third embodiment will be specifically described. In addition, the same reference numerals are given to functional units that are the same as or equivalent to those in the third embodiment.

  The electronic device 400D of the fourth embodiment is the same as the third embodiment in that it includes two first units 410_1, a first unit 410_2, and a second unit 420, but the second unit 420 includes two second communication devices. The point provided with 428_1 and the second communication device 428_2 is different from the third embodiment. The second communication device 428_1 is supplied with the reference signal CK_21 from the clock generation circuit 425_1 of the power supply unit 424_1, and the second communication device 428_2 is supplied with the reference signal CK_22 from the clock generation circuit 425_2 of the power supply unit 424_2. Is done. The second communication device 428_1 and the first communication device 418_1 constitute a first transmission / reception pair, and the second communication device 428_2 and the first communication device 418_2 constitute a second transmission / reception pair. The signal transmission system (transmission / reception pair) configured with the communication device on the receiving side is separately provided.

  The DC power supply 404 is connected to the second communication device 428_1 and the second communication device 428_2, and the power supply unit 424_1 of the power supply device 422_1 and the power supply unit 424_2 of the power supply device 422_2. Although not shown, in preparing a plurality of data transmission / reception systems, the first communication device 418_1 is arranged in one of the two first units 410_1 and the first unit 410_2, and the second communication device 428_2 is arranged in the other, corresponding to this. As described above, the second communication device 428_1 paired with the first communication device 418_1 may be disposed in one second unit 420 and the first communication device 418_2 paired with the second communication device 428_2 may be disposed.

  The frequency fd_1 (≠ fo_1) of the carrier signal generated by the first communication device 418_1 based on the reference signal CK_11 generated by the reference signal generation unit 416_1 and the reference signal generated by the reference signal generation unit 416_2 by the first communication device 418_2 The frequency fd_2 (≠ fo_2) of the carrier signal generated based on CK_12 is assumed to be fo_1 <fo_2 <fd_1 <fd_2 (see FIG. 6B). In Example 4, in order to prevent interference during frequency division multiplexing, the bandwidth Wb_1 centered on the carrier frequency fd_1 and the bandwidth Wb_2 centered on the carrier frequency fd_2 are not overlapped. The second communication device 428_1 corresponding to the first communication device 418_1 uses the carrier signal of frequency fd_1, and the second communication device 428_2 corresponding to the first communication device 418_2 uses the carrier signal of frequency fd_2.

  In the fourth embodiment, basically, the operation in the case of “fo_1 <fo_2 <fd_1 <fd_2” in the third embodiment is possible. Further, as an advantage unique to the fourth embodiment, both the first communication device 418_1 and the first communication device 418_2 are simultaneously operated by applying frequency division multiplexing, and the second communication device 428_1 and the second communication device 428_2 Even when both are operated simultaneously, the radio wave of frequency fd_1 and the radio wave of frequency fd_2 can be separated. Therefore, data transmission between the first communication device 418_1 and the second communication device 428_1 using the carrier signal of the frequency fd_1, and between the first communication device 418_2 and the second communication device 428_2 using the carrier signal of the frequency fd_2 There is no problem of interference with data transmission in between.

[Modification of Example 3 and Example 4]
In the third and fourth embodiments, when a plurality of non-contact power transmission systems are used, a plurality (both illustrated by two) of first units 410 are provided and one (that is, a single) second unit 420 is provided. Although shown in the example of providing, it is not limited to this. The number of each unit may be either singular or plural, and it is sufficient that there are at least a plurality of sets of the power receiving apparatus 412 and the power supply apparatus 422 that use the same frequency. As can be understood from the description in the modification of the first embodiment and the second embodiment, each pair of the power reception device 412 and the power supply device 422 needs to have a pair of the power reception device 412 and the power supply device 422. Instead, a plurality of power receiving apparatuses 412 may exist for one power supply apparatus 422. The fact that there are a plurality of sets of the power receiving device 412 and the power supply device 422 means that at least a plurality of power supply devices 422 need to exist, and it is sufficient that they transmit power using different frequencies. It does not matter whether there is one power receiving device 412 or a plurality of power receiving devices 412 on the power receiving side for each power supply device 422.

  8 to 9 are diagrams for explaining the fifth embodiment. Here, FIG. 8 is a schematic diagram of the overall outline of the electronic apparatus and the transmission apparatus according to the fifth embodiment. FIG. 9 is a schematic diagram of an arrangement mode of units constituting the electronic apparatus and the transmission device according to the fifth embodiment.

  Example 5 is a more specific example of Example 3. Although not shown, the fifth embodiment can be applied based on the fourth embodiment. As shown in FIG. 8, an electronic apparatus 400E according to the fifth embodiment is configured as a SiP (System in Package) in which a plurality of LSI (Large Scale Integration) chips are sealed in one package. As an example, in the electronic device 400E, one second unit 420 on which a CPU (Central Processing Unit) and a communication chip RF_0 are mounted is disposed on the upper layer of the interposer substrate 409, and a DRAM (Dynamic Random) is disposed on the upper layer of the second unit 420. A plurality (three in the figure) of first units 410 on which other LSI chips such as (Access Memory) and communication chips RF are mounted are arranged. Of the plurality of first units 410, the first storage unit DRAM_1 and the communication chip RF_1 are mounted on the first first unit 410_1 closest to the second unit 420. The second storage unit DRAM_2 and the communication chip RF_2 are mounted on the second first unit 410_2, which is an upper layer of the first unit 410_1. A logic circuit (Logic) and a communication chip RF_3 are mounted on the third first unit 410_3 in the upper layer of the first unit 410_2.

  The communication chip RF_0 is provided with a circuit similar to the reception chip RX of the second embodiment when it is on the reception side, and is provided with a drive circuit 426 when it is on the transmission side, and also has the transmission chip TX (power reception) of the second embodiment. A circuit similar to that of the power supply unit 414 and the reference signal generation unit 416 is provided. The communication chip RF_0 is provided with both a configuration for the reception side and a configuration for the transmission side (one overlapping drive circuit 426 may be used) in the case of supporting bidirectional communication. Each of the communication chip RF_1, the communication chip RF_2, and the communication chip RF_3 is provided with a circuit similar to the transmission chip TX of the second embodiment when it is on the transmission side, and the power receiving power source unit 414 and the communication chip RF_3 when it is on the reception side. A reference signal generation unit 416 is provided, and a circuit similar to the reception chip RX (except for the power supply unit 424) of the second embodiment is provided. Each of the communication chip RF_1, the communication chip RF_2, and the communication chip RF_3 has both a configuration on the reception side and a configuration on the transmission side (duplicate power receiving power supply units 414 when supporting bidirectional communication). And only one reference signal generation unit 416 may be provided.

  The second unit 420 includes a power transmission element 423_1 (see FIG. 5) connected to a power supply device 422_1 (not shown) (see FIG. 5) and a power transmission element 423_2 connected to a power supply device 422_2 (see FIG. 5) (not shown). (See FIG. 5). The first unit 410_1 is provided with a power receiving element 413_21 connected to a power receiving device 412_21 (not shown), and the first unit 410_2 is provided with a power receiving element 413_11 connected to a power receiving device 412_11 (not shown). Is provided with a power receiving element 413_22 connected to a power receiving device 412_22 (not shown). In relation to FIG. 5, the power receiving device 412_11 and the power receiving element 413_11 correspond to the power receiving device 412_1 and the power receiving element 413_1 using the frequency fo_1, respectively, and the power receiving device 412_21, the power receiving element 413_21, the power receiving device 412_22, and The power receiving element 413_22 corresponds to the power receiving device 412_2 and the power receiving element 413_2 that use the frequency fo_2, respectively.

  In terms of signal transmission, in addition to signals that require high speed and large capacity, other low-speed and small-capacity signals that are sufficient are transmitted by millimeter waves. Thereby, all signals including the power supply (electric power) can be transmitted wirelessly. Furthermore, when performing data transmission / reception in the millimeter wave band, it is preferable that the reference signal for the communication chip RF on the power receiving side based on the power transmission signal Power for non-contact power transmission, as in the third and fourth embodiments. By generating CK, the power transmission signal Power itself is substantially used as a reference signal for the communication chip RF. For example, the communication chip RF_1 of the first unit 410_1 generates the reference signal CK_12 using the power transmission signal Power_2 received by the power receiving element 413_21, and the communication chip RF_2 of the first unit 410_2 receives the power transmission signal Power_1 received by the power receiving element 413_11. The reference signal CK_11 is generated using the communication chip RF_3 of the first unit 410_3, and the reference signal CK_12 is generated using the power transmission signal Power_2 received by the power receiving element 413_22.

  As shown in FIG. 9, as in the second embodiment, each of the power receiving element 413 and the power transmitting element 423 is formed in a coil shape by winding a conductor pattern in the vicinity of the periphery on the circuit board 411 or the circuit board 421. Thus, a conductor pattern coil is formed so that both conductor pattern coils face each other. As can be understood from the comparison between FIG. 3 of the second embodiment and FIG. 9 of the fifth embodiment, the electronic apparatus 400E of the fifth embodiment has one power supply unit (second unit 420 in this example). In some respects, the second unit 420 includes a power transmission element 423_1 connected to each of a plurality of power supply devices 422 (not shown) each using a different frequency (fo_1 and fo_2) and a power transmission. The difference is that the element 423_2 has a coaxial core in a planar shape. In the illustrated example, the power transmitting element 423_1 on the side using the frequency fo_1 is formed in a coil shape by spirally winding a conductor pattern near the periphery on the circuit board 421. A conductor pattern is spirally wound around the inner periphery of the power transmission element 423_2 on the side using the frequency fo_2 so as to be coaxial with the power transmission element 423_1. In the second unit 420, the communication chip RF and the antenna 478 are arranged on the inner periphery of the power transmission element 423_2 (conductor pattern coil) on the circuit board 421. Although not shown, the second unit 420 is also provided with a clock generation circuit 425.

  Even if each LSI chip is created by a separate process, power transmission is possible as long as the power receiving element 413 for power transmission and the power transmission element 423 have the same resonance frequency, and power reception is possible. If the resonance frequencies are different from each other, the power transmission efficiency is lowered and the power transmission is not substantially performed. The frequency of the power transmission signal Power is adjusted to the resonance frequency of the corresponding power receiving element 413 and power transmitting element 423. As a non-contact power transmission method, it is suitable for an electromagnetic induction type or a resonance type that uses a resonance phenomenon together.

  For example, as can be understood from FIG. 9, a plurality of power reception devices 412 (power reception element 413 and power reception power supply unit 414 (not illustrated)) of the plurality of first units 410 on the power receiving side are illustrated. The one-to-many non-contact power transmission device is configured by disposing the power supply device 422 (the power transmission element 423 and the power supply unit 424 (not shown)) in one second unit 420 (the circuit board 421). .

  The arrangement | positioning aspect of the power receiving element 413 and the power transmission element 423 is arrange | positioned at the same axial center when each of the some power transmission element 423 planarly views. Corresponding elements of the plurality of power transmission elements 423 and the plurality of power reception elements 413 are arranged so as to overlap each other on the same axis, but when viewed from the power transmission element 423_1 and from the power transmission element 423_2, On the other hand, a plurality of power receiving elements 413 are arranged so as to overlap substantially on the same axis. In this case, if the same frequency is used as the power transmission signal Power of each system, it becomes difficult to distinguish and supply only to the corresponding one (original power supply target). Therefore, in this example, the power transmission element 423_1 uses the frequency fo_1, and the power transmission element 423_2 uses the frequency fo_2. Incidentally, the power transmission element 423_2 system using the power transmission signal Power_2 having the frequency fo_2 has a plurality of power reception elements 413 (power reception element 413_21 and power reception element 413_22) arranged on the same axis on the power reception side. Both of the plurality of power receiving elements 413 receive the power transmission signal Power_2 in the same manner. In terms of using different frequencies for non-contact power transmission, it is better to use the electromagnetic induction type and the resonance type than the radio wave reception type as the non-contact power transmission method. It is better to use together.

The electronic apparatus 400E according to the fifth embodiment is also different in that a plurality of first units 410 each including a power supply device 422 (not shown) corresponding to each power supply device 422 are provided. In the example shown in FIG. P6, the power receiving element 413_11 is arranged to face the power transmitting element 423_1 in the first unit 410_2 corresponding to the power supply device 422_1 using the frequency fo_1. Furthermore, corresponding to the power supply device 422_2 using the frequency fo_2, the first unit 410_1 is provided with a power receiving element 413_21 so as to face the power transmitting element 423_2, and the first unit 410_3 is provided with a power transmitting element 423_2 and The power receiving element 413_22 is arranged so as to face the first unit 410_1. The communication chip RF_1 and the antenna 458_1 are arranged on the inner periphery of the power receiving element 413_21 on the circuit board 411_1, and the first unit 410_2 is arranged on the circuit board 411_2. The communication chip RF_2 and the antenna 458_2 are disposed on the inner periphery of the upper power receiving element 413_11. In the first unit 410_3, the communication chip RF_3 and the antenna 458_3 are disposed on the inner periphery of the power receiving element 413_22 on the circuit board 411_3.

  The communication chip RF_0 of the second unit 420 is connected to a DC power supply 404 that supplies a DC voltage DC_0. The communication chip RF_1 of the first unit 410_1, the communication chip RF_2 of the first unit 410_2, and the first unit 410_3 A DC power supply that supplies DC voltage DC_0 is not connected to any of the communication chips RF_3, and the power receiving signal 413 receives the power transmission signal Power from the power transmitting element 423 by non-contact power transmission using the conductor pattern coil. A DC voltage DC is generated and used by the communication chip RF. For example, the power transmission signal Power_1 having the frequency fo_1 from the power transmission element 423_1 is received by the power reception element 413_11 of the first unit 410_2 to generate the DC voltage DC_11 and used by the communication chip RF_2. The power transmission signal Power_2 having the frequency fo_2 from the power transmission element 423_2 is received by the power reception element 413_21 of the first unit 410_1 to generate the DC voltage DC_21 and used by the communication chip RF_1. The power reception signal of the first unit 410_3 By receiving the element 413_22, a DC voltage DC_22 is generated and used by the communication chip RF_3. The values of the DC voltage DC_11, the DC voltage DC_21, and the DC voltage DC_22 are not necessarily the same, and may be different.

  When high-speed data transmission / reception in the millimeter wave band is performed between on-board antennas (antenna 458 and antenna 478), the power receiving side is based on the power transmission signal Power for non-contact power transmission, as in the third and fourth embodiments. By generating the reference signal CK_11 or the reference signal CK_12 for the communication chip RF, the power transmission signal Power itself is substantially used as the reference signal for the communication chip RF on the power receiving side. As a result, it is not necessary to prepare a DC power source for each first unit 410 on the power receiving side, and it is not necessary to mount a crystal oscillator or the like for generating a reference signal, and the first unit 410 on the power receiving side As a circuit for generating the reference signal, a simple and low-cost circuit (for example, a comparison circuit) can be used.

  Incidentally, the circuit board 411 is sandwiched between the antenna 478 and each antenna 458 or between the power transmitting element 423 and each power receiving element 413, but since it is a dielectric material, non-contact power transmission and in the millimeter wave band There is little impact on wireless transmission.

  Even when the power transmitting element 423 and the power receiving element 413 overlap each other on the same axis when power is supplied between a plurality of units mounted with LSI chips by non-contact power transmission in the SiP configuration, By performing non-contact power transmission using different frequencies for each system, power supply can be turned on / off for each system (that is, a power transmission destination can be selected). Incidentally, in the fifth embodiment, the case where the SiP configuration is adopted as the electronic device 400E is shown. However, the relationship between the base substrate and the interposer substrate, and other cases where a plurality of circuit boards are arranged substantially overlapping on the same axis. The same idea can be applied. The communication between the communication chip RF_0 and the communication chip RF_2, and the communication chip RF_0 are individually turned on and off to transmit the power transmission signal Power_1 having the frequency fo_1 and transmitting the power transmission signal Power_2 having the frequency fo_2. And transmission / reception in signal transmission corresponding to on / off of the power transmission system, such as operating only one or both of communication between the transmission / reception pair of communication chip RF_1 and communication chip RF_3 You can control the movement of each pair separately.

[Modification of Example 5]
Although not shown, each of the plurality of power transmitting elements may be arranged at different positions when viewed in plan, for example, each of the plurality of power transmitting elements 423 corresponding to each of the power receiving elements 413 of the plurality of power receiving units. May be arranged in a plane so as to have different axes. Substantially, the configuration of Example 1 or Example 2 is arranged in the horizontal direction, and it is adopted when all units on the power receiving side cannot be placed on one power feeding side unit. Good. For example, the power transmitting element 423_2, the power receiving element 413_21, and the power receiving element 413_22 are planar with respect to the power transmitting element 423_1 so that the power receiving element 413_21 and the power receiving element 413_22 are not substantially overlapped with the power transmitting element 423_1. The power transmitting element 423_1 and the power receiving element 413_11 are arranged with respect to the power transmitting element 423_2 so that the power receiving element 413_11 is not overlapped with the power transmitting element 423_2 with substantially the same axis. Arrange at a position shifted in a plane. In this case, the system of the power transmission element 423_1 and the system of the power transmission element 423_2 may be driven at different frequencies or may be driven at the same frequency. In this case, the power supply unit may be divided into a plurality of units.

  The sixth embodiment is an example in which the configuration in which the wireless signal transmission and the non-contact power transmission of each of the above-described embodiments are used together is applied to an electronic device different from the fifth embodiment. Three typical cases are shown below.

[First example]
FIG. 10 is a diagram illustrating a first example of an electronic apparatus according to the sixth embodiment. The first example is an application example in the case where signal transmission is performed wirelessly within the casing of one electronic device. As an electronic device, an example of application to an imaging device including a solid-state imaging device will be described. This type of imaging apparatus is distributed in the market as, for example, a digital camera, a video camera (camcorder), or a computer camera (Web camera).

  In the housing 590 of the imaging apparatus 500, an imaging board 502, a first board 602_1 (main board), and a second board 602_2 (sub board) are arranged in this order. A solid-state imaging device 505 is mounted on the imaging substrate 502. For example, the solid-state imaging device 505 is a CCD (Charge Coupled Device), and includes a case where the solid-state imaging device 505 is mounted on the imaging substrate 502 including its drive unit (horizontal driver or vertical driver), or a CMOS (Complementary Metal-oxide Semiconductor) sensor. To do. The semiconductor chip 203 is mounted on the imaging substrate 502, the semiconductor chip 103_1 is mounted on the first substrate 602_1, and the semiconductor chip 103_2 is mounted on the second substrate 602_2.

  In order to support non-contact power transmission, two power supply units 424 are incorporated in the semiconductor chip 103_1, and a power reception unit 414 and a reference signal generation unit 416 are incorporated in the semiconductor chip 103_2 and the semiconductor chip 203, respectively. Then, the power transmitting element 423_1 and the power transmitting element 423_2 are disposed on the first substrate 602_1 on which the semiconductor chip 103_1 is mounted, the power receiving element 413_1 is disposed on the imaging substrate 502 on which the semiconductor chip 203 is mounted, and the second substrate on which the semiconductor chip 103_2 is mounted. A power receiving element 413_2 is disposed at 602_2. As the power transmission element 423_1, the power transmission element 423_2, the power reception element 413_1, and the power reception element 413_2, for example, the power transmission element 423_1 and the power reception element 413_1 face each other in the vicinity of the periphery on the imaging board 502, the first board 602_1, and the second board 602_2. A conductor pattern is spirally wound and formed in a coil shape so that the power transmitting element 423_2 and the power receiving element 413_2 are opposed to each other, thereby forming a conductor pattern coil.

  In addition to the solid-state imaging device 505, a peripheral circuit (not shown) such as an imaging drive unit is mounted on the imaging substrate 502, an image processing engine 605 is mounted on the first substrate 602_1, and an operation unit is mounted on the second substrate 602_2. And various sensors and a control processing unit 606 for controlling them are mounted. Each of the semiconductor chip 203, the semiconductor chip 103_1, and the semiconductor chip 103_2 has a function equivalent to that of the transmission chip TX and the reception chip RX. By incorporating both functions of the transmission chip and the reception chip, it is possible to cope with bidirectional communication.

  The solid-state imaging device 505 and the imaging drive unit correspond to the application function unit of the LSI function unit provided in the preceding stage of the transmission side communication device. For example, a signal generation unit on the transmission side is connected to the LSI function unit, and is further connected to an antenna via a transmission line coupling unit. The signal generation unit and the transmission path coupling unit are accommodated in a semiconductor chip 203 different from the solid-state imaging device 505 and are mounted on the imaging substrate 502.

  The image processing engine 605 corresponds to the application function unit of the LSI function unit provided in the subsequent stage of the communication device on the receiving side. For example, an image processing engine 605 that processes an imaging signal obtained by the solid-state imaging device 505 is housed in the image processing engine 605, a reception-side signal generation unit is connected to the LSI function unit, and an antenna is connected via a transmission path coupling unit. 136_1. The signal generation unit and the transmission path coupling unit are accommodated in a semiconductor chip 103_1 different from the image processing engine 605 and are mounted on the first substrate 602_1. The operation unit, various sensors, and the like correspond to the application function unit of the LSI function unit provided in the front stage of the transmission side communication apparatus or the rear stage of the reception side communication apparatus. For example, a control processing unit 606 for controlling an operation unit, various sensors, and the like is housed in an LSI function unit, and a signal generation unit on a transmission side or a reception side is connected to the LSI function unit, and further, via a transmission line coupling unit. Connected to the antenna 136_2. The signal generation unit and the transmission path coupling unit are accommodated in a semiconductor chip 103_2 different from the LSI function unit that accommodates the control processing unit 606, and are mounted on the second substrate 602_2. As the antenna 136_1, the antenna 136_2, and the antenna 236, for example, patch antennas are used.

  The signal generation unit on the transmission side includes, for example, a multiplexing processing unit, a parallel serial conversion unit, a modulation unit, a frequency conversion unit, an amplification unit, and the like, and the signal generation unit on the reception side includes, for example, an amplification unit, a frequency conversion unit, and a demodulation unit Unit, serial / parallel conversion unit, unification processing unit, and the like. These points are the same in other application examples described later.

  By performing wireless communication between the antenna 136_1 and the antenna 236, an image signal acquired by the solid-state imaging device 505 is transmitted to the first substrate 602_1 via the wireless signal transmission path 9 between the antennas. In this case, for example, a reference signal for controlling the solid-state imaging device 505 and various control signals are transmitted via the wireless signal transmission path 9 between the antennas to the imaging substrate 502. Is transmitted to. By performing wireless communication between the antenna 136_1 and the antenna 136_2, operation information and information acquired by various sensors are transmitted to the first substrate 602_1.

  Both of FIG. 10A and FIG. 10B are provided with four systems of wireless signal transmission paths 9. In FIG. 10A, all four systems are free space transmission lines 9B, but in FIG. 10B, the two systems between the imaging substrate 502 and the first substrate 602_1 are changed to hollow waveguides 9L. . The hollow waveguide 9L may have a structure in which the periphery is surrounded by a shielding material and the inside is hollow. For example, the periphery is surrounded by a conductor MZ, which is an example of a shielding material, and the interior is hollow. For example, an enclosure of the conductor MZ is attached on the first substrate 602_1 so as to surround the antenna 136. The moving center of the antenna 236 on the imaging substrate 502 side is arranged at a position facing the antenna 136. Since the inside of the conductor MZ is hollow, it is not necessary to use a dielectric material, and the radio signal transmission path 9 can be easily configured at low cost.

  The basic operation of each system is the same as the operation of one system, but the shorter the distance between the systems (distance between channels: corresponding to the distance between the two antennas on the transmitting side in this example), the more radio signals are transmitted. Since the path 9 is close, simultaneous communication is performed using the same carrier frequency in each system between the first substrate 602_1 and the second substrate 602_2 in FIG. 10A and FIG. 10B. In such a case, interference or interference on the receiving unit side may become a problem. It is difficult to adjust the arrangement of the transmitting antenna (aerial), the strength of the electromagnetic wave output from the transmitting antenna, the arrangement of the receiving antenna, etc., and the distance between channels is short, avoiding interference and interference in the electromagnetic wave transmission path. When it is difficult, as shown in FIG. 10B, an electromagnetic wave shield (conductor MZ: metal or the like) may be installed between the two radio signal transmission lines 9. Or you may employ | adopt the frequency division demultiplexing system which makes a frequency band used by the two radio signal transmission lines 9 different.

  For example, in a signal processing device having a solid-state imaging device such as a digital still camera or a camcorder camera, imaging data from the solid-state imaging device is transmitted at high speed. Electric signals are used for high-speed transmission, and most of them are transmitted to signal processors using flexible wiring boards, printed wiring boards, cables, etc. Have. On the other hand, in the sixth embodiment (first example), the transmission target signal is transmitted as a wireless signal, and therefore there is no portion for performing signal transmission by electric wiring. The signal output from the solid-state imaging device has a large capacity and high speed. However, transmission by electrical wiring is difficult to design, and if branching / distribution of the transmission path is necessary, a circuit (such as an integrated circuit) Therefore, the design time is increased and the cost is increased. On the other hand, in the sixth embodiment (first example), signal transmission is performed with a radio signal using an electromagnetic wave transmission path using millimeter waves, and thus the above-described problem is eliminated.

  A DC power source is not disposed on the imaging substrate 502 and the second substrate 602_2, and power is supplied from the first substrate 602_1 to the imaging substrate 502 and the second substrate 602_2 by applying non-contact power transmission. At this time, preferably, contactless power transmission is performed only on a single carrier, and data transmission is performed in a frequency band different from the frequency of the single carrier for contactless power transmission, thereby reducing the efficiency of contactless power transmission. In addition, a wide bandwidth is ensured, and interference such as noise caused by non-contact power transmission to data transmission is prevented. The frequency of contactless power transmission between the first substrate 602_1 and the imaging substrate 502 may be the same as or different from the frequency of contactless power transmission between the first substrate 602_1 and the second substrate 602_2. Also good. When the frequencies are different, on / off control can be performed independently. Furthermore, it is preferable that the imaging substrate 502 and the second substrate 602_2 on the power receiving side use the power transmission signal itself as a reference signal so that the same effects as in the first to fifth embodiments can be obtained.

  In communication between the antenna 136_2 and the antenna 236, the first substrate 602_1 is sandwiched, but since it is a dielectric material, it has little influence on wireless transmission in the millimeter wave band.

[Second example]
FIG. 11 is a diagram illustrating a second example of the electronic apparatus according to the sixth embodiment. The second example is an application example in the case where signal transmission is performed wirelessly between electronic devices in a state where a plurality of electronic devices are integrated. In particular, the present invention is applied to signal transmission between both electronic devices when one electronic device is mounted on the other electronic device.

  For example, a so-called IC card or memory card with a built-in central processing unit (CPU) or non-volatile storage device (for example, flash memory) is installed in the electronic device on the main unit. Some are made possible (detachable). A card type information processing apparatus which is an example of one (first) electronic device is also referred to as a “card type apparatus” below. The other (second) electronic device on the main body side is also simply referred to as an electronic device below.

  An example of the structure of the memory card 201B (planar perspective and sectional perspective) is shown in FIG. An example of the structure of the electronic device 101B (plan perspective and sectional perspective) is shown in FIG. FIG. 11C shows a structural example (cross-sectional perspective view) when the memory card 201B is inserted into the slot structure 4 (particularly the opening 192) of the electronic apparatus 101B. The electronic device 101B and the memory card 201B constitute the entire electronic device.

  The slot structure 4 is configured such that the memory card 201B (the casing 290) can be inserted into and removed from the housing 190 of the electronic apparatus 101B from the opening 192. A receiving-side connector 180 is provided at a contact position with the terminal of the memory card 201B of the slot structure 4. Connector terminals (connector pins) are not required for signals replaced with wireless transmission.

  As shown in FIG. 11A, a cylindrical concave configuration 298 (depression) is provided in the housing 290 of the memory card 201B, and a cylindrical projection is formed on the casing 190 of the electronic device 101B as shown in FIG. A shape configuration 198 (protrusion) is provided. The memory card 201B includes two substrates 202_1 and 202_2. The semiconductor card 203_1 is provided on one surface of the substrate 202_1 and the antenna 236_1 connected to the semiconductor chip 203_1 is formed. One surface of the substrate 202_2 In addition, an antenna 236_2 having the semiconductor chip 203_2 and connected to the semiconductor chip 203_2 is formed. The housing 290 has a concave configuration 298 formed at a position corresponding to each antenna 236, and the concave configuration 298 is made of a dielectric resin containing a dielectric material capable of transmitting a radio signal.

  On one side of each substrate 202, a connection terminal 280 for connecting to the electronic device 101 </ b> B at a predetermined position of the housing 290 is provided at a predetermined position. The memory card 201B partially includes a conventional terminal structure for low-speed and small-capacity signals. As shown by the broken line in the figure, the terminals for removing the power supply and the millimeter wave signal transmission target replaced with the non-contact transmission are removed.

  As illustrated in FIG. 11B, the electronic device 101 </ b> B includes the semiconductor chip 103 on the surface of the substrate 102 on the opening 192 side, and the antenna 136 is formed on one surface of the substrate 102. The housing 190 has an opening 192 in which the memory card 201B is inserted and removed as the slot structure 4. When the memory card 201B is inserted into the opening 192, a convex configuration 198 having a millimeter-wave confinement structure (waveguide structure) is formed on the housing 190 at a portion corresponding to the position of the concave configuration 298. It is configured to be a body transmission line 9A.

  As shown in FIG. 11C, the casing 190 of the slot structure 4 has a convex configuration 198 (dielectric transmission line 9A) and a concave configuration 298 that are concave and convex with respect to the insertion of the memory card 201B from the opening 192. It has a mechanical structure that makes contact. When the concavo-convex structure is fitted, the antenna 136 and a plurality (two in the figure) of antennas 236 face each other, and a dielectric transmission path 9A is disposed as the radio signal transmission path 9 therebetween. The memory card 201B sandwiches the housing 290 between the dielectric transmission path 9A and the antenna 236, but since the material of the concave configuration 298 is a dielectric material, it greatly affects wireless transmission in the millimeter wave band. It is not a thing.

  In order to support non-contact power transmission, two power supply units 424 are incorporated in the semiconductor chip 103, and a power receiving unit 414 and a reference signal generation unit 416 are incorporated in each of the semiconductor chip 203_1 and the semiconductor chip 203_2. Conductor pattern coil power transmitting element 423_1 and power transmitting element 423_2 are disposed on substrate 102 on which semiconductor chip 103 is mounted, and conductor pattern coil power receiving element 413_1 is disposed on substrate 202_1 on which semiconductor chip 203_1 is mounted, and semiconductor chip 203_2 is mounted. A power receiving element 413_2 having a conductor pattern coil is disposed on the substrate 202_2.

  The substrate 202_1 and the substrate 202_2 are not provided with a DC power supply, and power is supplied from the substrate 102 to the substrate 202_1 and the substrate 202_2 by applying non-contact power transmission. At this time, preferably, contactless power transmission is performed only for a single carrier, and data transmission is performed in a frequency band different from the frequency of the single carrier for contactless power transmission, thereby ensuring a wide bandwidth and for data transmission. This prevents interference such as noise caused by non-contact power transmission. The frequency of contactless power transmission between the power transmitting element 423_1 and the power receiving element 413_1 and the frequency of contactless power transmission between the power transmitting element 423_2 and the power receiving element 413_2 may be the same or different. When the frequencies are different, on / off control can be performed independently. Furthermore, each substrate 202 on the power receiving side may use the power transmission signal itself as a reference signal so that the same effects as in the first to fifth embodiments can be obtained.

  A housing 290, a substrate 202_1, and a substrate 202_2 are sandwiched between the antenna 136 and each antenna 236, and between each power receiving element 413 and each power transmitting element 423. Since these are dielectric materials, non-contact power transmission is performed. There is little impact on wireless transmission in the millimeter-wave band.

[Third example]
FIG. 12 is a diagram illustrating a third example of the electronic apparatus according to the sixth embodiment. A portable image playback device 201K is provided as an example of the first electronic device, and an image acquisition device 101K is provided as an example of a second (main body side) electronic device on which the image playback device 201K is mounted. The image acquisition apparatus 101K and the image reproduction apparatus 201K constitute the entire electronic device. In the image acquisition apparatus 101K, a mounting table 5K on which the image reproduction apparatus 201K is mounted is provided in a part of the housing 190. Instead of the mounting table 5K, the slot structure 4 may be used as in the second example. This is the same as the second example in that signal transmission is performed wirelessly between both electronic devices when one electronic device is attached to the other electronic device. Below, it demonstrates paying attention to difference with a 2nd example.

  The image acquisition device 101K has a substantially rectangular parallelepiped (box shape) shape and is no longer a card type. The image acquisition device 101K may be any device that acquires moving image data, for example, and corresponds to, for example, a digital recording / reproducing device or a terrestrial television receiver. The image playback device 201K has, as an application function unit, a storage device that stores moving image data transmitted from the image acquisition device 101K side, and a display unit (for example, a liquid crystal display device or an organic EL display) that reads the moving image data from the storage device. A function unit for reproducing a moving image is provided in the apparatus. Structurally, it may be considered that the memory card 201B is replaced with the image reproducing device 201K, and the electronic apparatus 101B is replaced with the image acquiring device 101K.

  In the casing 190 below the mounting table 5K, for example, as in the second example (FIG. 11), the semiconductor chip 103 is accommodated, and an antenna 136 is provided at a certain position. A dielectric transmission path 9 </ b> A is made of a dielectric material as a radio signal transmission path 9 in a portion of the housing 190 that faces the antenna 136. The housing 290 of the image reproducing device 201K mounted on the mounting table 5K has two substrates 202_1 and 202_2. For example, as in the second example (FIG. 11), a semiconductor chip is formed on one surface of the substrate 202_1. An antenna 236_1 having 203_1 and connected to the semiconductor chip 203_1 is formed, and an antenna 236_2 having the semiconductor chip 203_2 and connected to the semiconductor chip 203_2 is formed on one surface of the substrate 202_2. The portion of the housing 290 that faces the antenna 236_1 and the antenna 236_2 is configured such that the radio signal transmission path 9 (dielectric transmission path 9A) is made of a dielectric material. These points are the same as in the second example.

  The configuration for supporting non-contact power transmission is the same as that of the second example described above. Two power supply power supply units 424 are incorporated in the semiconductor chip 103, and each of the semiconductor chip 203_1 and the semiconductor chip 203_2 has a power reception power supply unit 414. And a reference signal generation unit 416 is incorporated. Conductor pattern coil power transmitting element 423_1 and power transmitting element 423_2 are disposed on substrate 102 on which semiconductor chip 103 is mounted, and conductor pattern coil power receiving element 413_1 is disposed on substrate 202_1 on which semiconductor chip 203_1 is mounted, and semiconductor chip 203_2 is mounted. A power receiving element 413_2 having a conductor pattern coil is disposed on the substrate 202_2.

  The third example adopts a wall surface abutting method instead of the concept of a fitting structure, and the antenna 136 and the antenna 236 face each other when the image acquisition device 101K is placed against the corner 101a of the mounting table 5K. Therefore, it is possible to reliably eliminate the influence of positional misalignment. With such a configuration, when the image reproducing device 201K is mounted (mounted) on the mounting table 5K, it is possible to perform alignment with respect to the wireless signal transmission of the image reproducing device 201K. The housing 190, the housing 290, and the substrate 202_1 are sandwiched between the antenna 136 and each antenna 236, and between each power receiving element 413 and each power transmitting element 423. Since these are dielectric materials, non-contact power There is little effect on transmission and wireless transmission in the millimeter wave band.

<Contrast with comparative example>
FIG. 13 is a diagram for explaining the comparison between the present invention and a comparative example. The non-contact power transmission and signal transmission described in Japanese Patent Laid-Open No. 2002-26778 employs a technique in which a power transmission signal for transmitting power in a non-contact manner is used as a carrier signal for signal transmission. There is a trade-off between data rate and transmission bandwidth. For example, AC power is supplied from the primary transformer 10 to the secondary transformer 20 by switching the amount of current to the plurality of switches SW1 to SW3, and smoothed by the smoothing circuit 21 to obtain DC power and signals. As an application example, an instrument panel (primary) and a meter (secondary) of a car are assumed. In this method, the carrier wave is always flowing, and the secondary side is always in the power-on state. Then, amplitude modulation is performed by the switches SW1 to SW3, and a signal is transmitted to each block on the secondary side. For this reason, as shown in FIG. 13A, the power transmission signal for non-contact power transmission and the carrier signal for signal transmission may have the same frequency, but, for example, in the case of coupling with only the resonance frequency fo, the bandwidth is wide. If the transmission signal of each channel (switch) is low, normal signal transmission cannot be performed. Since the degree of coupling is lowered in order to provide a band, if the signal band is widened to perform signal transmission at a high rate, there is a problem that coupling of transformers becomes inefficient and efficiency of contactless power transmission is lowered.

  On the other hand, in the present invention, preferably, by performing data transmission in a frequency band different from the frequency for contactless power transmission, it is possible to ensure a wide bandwidth without reducing the efficiency of contactless power transmission. it can.

  As an application example, contactless power transmission and signal transmission described in JP-A-2004-80844 are assumed to be an automobile airbag device. The power feeding circuit includes a switching element (FET 111 and FET 112) connected in series with the DC power source, a resonant capacitor connected in series between the switching element and the primary winding of the output transformer, and a predetermined on- And a resonant switching power supply including control means for switching control at an off frequency. A pulse signal is input to the FET 111 and the FET 112 from the drive circuit 115 on the primary side (the vehicle body side). The on / off frequency coincides with the resonance frequency fo_1 determined by the resonance capacitor and the primary winding of the output transformer when the airbag inflator is activated, and the frequency fo_2 not coincident with the resonance frequency fo_1 when the airbag inflator is not activated. Set as follows. The FET 111 and the FET 112 are supplied with a pulse having a different duty ratio and are turned on / off to supply a pulse to the transformer 103, rectified by a secondary side (steering side) power receiving circuit, and supplied to the communication control circuit 107. To do. When the collision sensor is activated, the charge pump is activated, and the capacitor 113 and the transformer 103 resonate. As a result, electric power higher than the normal operation is transmitted to the secondary side, and the airbag inflator having a high load operates. This method sacrifices power transmission efficiency during normal operation when the airbag is not operating and only the communication control circuit 107 is operating. In addition to the contactless power transmission system for transmitting power from the vehicle body side to the steering side, the frequency fo_1 and the frequency fo_2 of the power transmission signal for contactless power transmission between the body side and the steering side of the vehicle There is provided a system for performing signal transmission (for example, transmission of an airbag signal) using a carrier signal having a frequency fd different from that of the carrier wave. However, since the communication device that transmits the airbag signal from the airbag sensor unit to the airbag inflator is via an optical communication circuit, it is necessary to configure the circuit with various parts as a problem peculiar to the application of optical communication. is there.

  On the other hand, in the present invention, preferably, signal transmission between the units is realized by radio waves (especially, using a carrier signal in the millimeter wave band or a frequency band in the vicinity thereof) without using electrical wiring or light. . Since radio waves are used, wireless communication technology can be applied, and the problems associated with using electrical wiring can be eliminated, and signal interfaces between units can be constructed with a simpler and cheaper configuration than when using light. This is more advantageous than using light in terms of size and cost.

  Further, both of Japanese Patent Application Laid-Open Nos. 2004-80844 and 2004-80844 disclose only one-to-one non-contact power transmission and one-to-one data transmission. Contact power transmission and one-to-many data transmission, one-to-many non-contact power transmission and many-to-many data transmission are not disclosed. On the other hand, in the third to sixth embodiments of the present invention, a plurality of systems for transmitting power in a contactless manner and a system for performing signal transmission in a contactless manner are provided, and one-to-many contactless power transmission In addition, one-to-many data transmission, one-to-many non-contact power transmission and many-to-many data transmission can be realized. In addition, a plurality of systems for transmitting power in a contactless manner are provided, and for each system, a reference signal serving as a reference for signal processing on the power receiving side is generated based on a power transmission signal received by contactless power transmission. With respect to the system, it is possible to transmit a reference signal from one to the other in a non-contact manner with a simple configuration.

  As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. Various changes or improvements can be added to the above-described embodiment without departing from the gist of the invention, and embodiments to which such changes or improvements are added are also included in the technical scope of the present invention.

  Further, the above embodiments do not limit the invention according to the claims (claims), and all combinations of features described in the embodiments are not necessarily essential to the solution means of the invention. Absent. The embodiments described above include inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements. Even if some constituent requirements are deleted from all the constituent requirements shown in the embodiment, as long as an effect is obtained, a configuration from which these some constituent requirements are deleted can be extracted as an invention.

  For example, in the above-described embodiment, the signal transmission and the wireless transmission of power transmission are applied in a device or between devices as a particularly preferable aspect. However, the applicable range is in principle in one electric device. The present invention can also be applied to a single substrate or between a plurality of relatively distant electrical devices. However, it is considered that there is not much need for wireless signal transmission and power transmission on one board. Further, in terms of wireless transmission (non-contact) while performing signal transmission in the millimeter wave band or a frequency band in the vicinity thereof, between a plurality of substrates in an electrical device, between devices or between devices ( It is most suitable to apply between a plurality of electrical devices at a relatively short distance including a contact state.

  In the above-described embodiment, an electronic apparatus is described that includes a communication device as a load device that transmits power by non-contact power transmission and transmits a signal to be transmitted wirelessly (especially, using a millimeter wave band or a nearby frequency band). However, in both the power supply side and the power reception side units, the load device that receives power supply is not limited to the communication device. In other words, the signal processing that is performed by supplying power to both load devices of both the power supply side and the power reception side units is not limited to communication processing. Also in this case, the reference signal generation unit 416 may generate a reference signal that serves as a reference for signal processing of the load device, based on the power transmission signal received by the power receiving element 413. The load device on the power supply side can perform predetermined signal processing using the reference signal generated by the clock generation circuit 425. The load device on the power receiving side can perform predetermined signal processing upon receiving power supply, and can use the reference signal generated by the reference signal generation unit 416 based on the power transmission signal to The signal processing can be performed in synchronization with the load device.

<Phase uncertainty and countermeasures>
FIG. 14 is a diagram for explaining the phase uncertainty and a countermeasure technique thereof. In the description of the above-described embodiment, on the power receiving side, a reference signal used by the communication device is generated based on a power transmission signal for non-contact power transmission. Therefore, even if the frequency of the reference signal supplied to the communication device on the power receiving side is the same (frequency synchronization is taken) and the phase is locked (even if phase synchronization is taken), each communication device on the power receiving side A phenomenon (referred to as phase uncertainty) may occur in which the phases of the reference signals supplied to are not the same. This is because the phase of the power transmission signal of the power transmission element 423 on the power supply side and the phase of the power transmission signal excited by the power reception element 413 on the power reception side may not match depending on the method of contactless power transmission. Depending on the phase difference between the transmission side and the reception side of the transmission signal, normal demodulation processing cannot be performed.

  There is no problem even if there is phase uncertainty in a system in which the function unit (in this example, the communication device) that uses the reference signal generated by the reference signal generation unit 416 only needs to be frequency synchronized and phase synchronized. On the other hand, when the demodulation function unit 470 on the reception side performs demodulation using synchronous detection, phase uncertainty can be a problem. For example, when the modulation method is a uniaxial modulation method such as ASK or BPSK, it is necessary that the phases of the carrier signals used on the transmission side and the reception side must be the same, and therefore, used on the reception side. Uncertainty of the phase of the carrier signal can affect the demodulation function unit 470 performing demodulation processing by synchronous detection. When the modulation method is a two-axis modulation method such as QPSK or QAM, it is necessary that the phase of the carrier signal used on each of the I-axis and the Q-axis on the transmission side and the reception side must match. Uncertainty in the phase of the carrier signal used on the side can be a problem.

  In order to eliminate the influence of the phase uncertainty, the effect of the phase of the power transmission signal of the power transmission element 423 on the power supply side and the phase of the power transmission signal excited by the power reception element 413 on the power reception side is not affected. It is preferable to provide a suppressing phase processing unit (phase uncertainty countermeasure function unit). As the phase processing unit, for example, a phase correction unit that sets the phase of the reference signal generated by the reference signal generation unit 416 based on the power transmission signal to an appropriate phase is provided, and the output signal of the phase correction unit is a communication device on the power receiving side It is good to supply to. Alternatively, a phase correction unit that supplies the reference signal generated by the reference signal generation unit 416 based on the power transmission signal to the communication device on the power receiving side and monitors the demodulation output so that the level of the output signal is appropriate. It may be provided. This will be described below.

[Countermeasure circuit for phase uncertainty]
As a configuration of the phase correction unit which is an example of the phase processing unit, a level detection unit is provided after the demodulation output (for example, a filter processing unit provided after the demodulation function unit 470), and the demodulated output detected by the level detection unit A first local oscillation unit 474 (specifically, a timing signal generation unit 460 that controls the reception side local oscillation unit 474) is controlled based on the level to change the phase of the output signal (carrier signal to the frequency mixing unit 472). There is a way. The first method is a method of directly controlling the phase of the demodulated carrier signal itself. In the case of the biaxial modulation method using the I axis and the Q axis as in the QPSK method, the first method may be applied to the components of each axis.

  Even in the case of a uniaxial modulation method such as the ASK method or the BPSK method, the demodulation function unit 470 is made a quadrature detection method, and a phase rotation unit and a level detection unit are provided at the subsequent stage, and quadrature detection output (I signal, Q signal) is used. There is also a second method in which the phase of the output signal is rotated by the phase rotation unit and the rotation amount is changed by controlling the phase rotation unit based on the output level of the phase rotation unit. In the case of the uniaxial modulation method such as the ASK method or the BPSK method, the level detection and the phase rotation need only be applied to the I-axis component. In the case of a biaxial modulation method such as the QPSK method, phase correction is performed by combining the I signal and the Q signal at different levels. The second method can be easily digitally processed, and the I and Q signals may be subjected to phase conversion by a digital circuit after AD conversion.

  The first method has a simpler circuit configuration, but the first method switches the phase with a high-frequency circuit, so that correction control is difficult, whereas the second method switches the phase with a baseband circuit. Therefore, correction control is simple. Hereinafter, in the case of the QPSK method, the case where the second method is adopted will be specifically described.

  FIG. 14 is a diagram illustrating a phase correction unit 8700 provided as a measure against phase uncertainty. The difference from the above-described embodiment is that a QPSK method (biaxial modulation method) is adopted instead of the ASK method (uniaxial modulation method). The demodulation function unit 470 of the reception chip RX is output from the frequency mixing unit 472_I that demodulates the I-axis component, the frequency mixing unit 472_Q that demodulates the Q-axis component, and the reception-side local oscillation unit 474 so as to configure an orthogonal detection circuit. A phase shifter 476 for shifting the phase of the oscillation signal by 90 degrees (π / 2). The oscillation signal output from the reception-side local oscillation unit 474 is supplied to the frequency mixing unit 472_I as the carrier signal LoI_RX. The frequency mixing unit 472_Q is supplied with the oscillation signal output from the reception-side local oscillation unit 474 as a carrier signal LoQ_RX after being shifted by π / 2 by the phase shifter 476.

  The reception chip RX includes a filter processing unit 8410 and a phase correction unit 8700 in this order in the subsequent stage of the demodulation function unit 470 configured with a quadrature detection circuit. The filter processing unit 8410 is provided with a filter processing unit 8410_I for the I-axis component at the subsequent stage of the frequency mixing unit 472_I, and is provided with a filter processing unit 8410_Q for the Q-axis component at the subsequent stage of the frequency mixing unit 472_Q. The phase correction unit 8700 includes a phase rotation unit 8702 and a level detection unit 8704 that detects the amplitude level of the output signal of the phase rotation unit 8702. The level detection unit 8704 performs phase rotation processing using the output (signal I) of the filter processing unit 8410_I and the output (signal Q) of the filter processing unit 8410_Q for quadrature detection. Specifically, the phase rotation unit 8702 includes a first gain adjustment unit 8722 that performs gain adjustment on the signal I of the I-axis component, a second gain adjustment unit 8724 that performs gain adjustment on the signal Q of the Q-axis component, and a gain adjustment unit. 8722 and a gain adjuster 8724 have a signal combiner 8732 for combining the output signals. The output signal I ′ of the signal synthesizer 8732 becomes the final demodulated signal of the I-axis component. The phase rotation amount α is adjusted with respect to the I-axis component by gain adjustment. Usually, the gain of the first gain adjustment unit 8722 may be constant (gain = 1), and the phase rotation amount α may be adjusted only by gain adjustment (gain = k1) on the second gain adjustment unit 8724 side. For example, as shown in the figure, the signal synthesis unit 8732 adds the signal I output from the first gain adjustment unit 8722 and the signal “k1 · Q” output from the second gain adjustment unit 8724 to output the signal. I '.

  The phase rotation unit 8702 includes a third gain adjustment unit 8726 that performs gain adjustment on the signal Q of the Q-axis component, a fourth gain adjustment unit 8728 that performs gain adjustment on the signal I of the I-axis component, and an output of the gain adjustment unit 8726. A signal synthesis unit 8736 for synthesizing the output signals of the signal and gain adjustment unit 8728 is provided. The output signal Q ′ of the signal synthesizer 8736 becomes the final demodulated signal of the Q-axis component. The phase rotation amount β is adjusted with respect to the Q-axis component by gain adjustment. Normally, the gain of the third gain adjustment unit 8726 is constant (gain = 1), and the phase rotation amount β is set only by gain adjustment on the fourth gain adjustment unit 8728 side (gain = k2: −k2 in consideration of the phase). Adjust it. For example, as shown in the figure, the signal synthesis unit 8736 subtracts the signal “−k2 · I” output from the fourth gain adjustment unit 8728 from the signal Q output from the third gain adjustment unit 8726 and outputs the result. Let it be signal Q ′.

  A first configuration example in which the input to the level detection unit 8704 is only the output signal I ′ of the signal synthesis unit 8732 for the I-axis component, and the second output is only the output signal Q ′ of the signal synthesis unit 8736 for the Q-axis component. The configuration example may be any of the third configuration example in which both the output signal I ′ of the signal synthesizer 8732 for the I-axis component and the output signal Q ′ of the signal synthesizer 8736 for the Q-axis component are used. When both the signal I and the signal Q are used, the circuit scale is larger than the case where only one is used, but the adjustment accuracy is improved.

  The figure shows a third configuration example in which both are used. The level detection unit 8704 includes a first level detection unit 8742 that detects the level of the output signal I ′ of the signal synthesis unit 8732 and an output signal of the signal synthesis unit 8736. A second level detection unit 8744 that detects the level of Q ′, and a signal synthesis unit 8746 that synthesizes output signals of the first level detection unit 8742 and the second level detection unit 8744 to generate the rotation control signal ROT. The signal synthesis unit 8746 subtracts the level signal DET_Q output from the second level detection unit 8744 from the level signal DET_I output from the first level detection unit 8742 to obtain the rotation control signal ROT.

  In any case, it is better to transmit a known pattern for adjustment. For example, in the case of only one of the known patterns (first configuration example or second configuration example), only the corresponding component signal is used. In both cases (third configuration example), only one component signal ( It is preferable to use a signal having only the I component or a signal having only the Q component.

  For example, in the illustrated configuration in which the level detection unit 8704 uses both the signal I and the signal Q, when adjusting the gain for phase correction, the BPSK signal is input to the demodulation function unit 470 and the output of the quadrature detection (signal The phase of the output signal is rotated by the phase rotation unit 8702 using I and the signal Q), and the output (I ′ component and Q ′ component) is detected by the level detection unit 8704. The level detection unit 8704 controls the phase rotation unit 8702 based on the detected amplitude level to change the rotation amount. For example, the gains of the second gain adjustment unit 8724 and the fourth gain adjustment unit 8728 of the phase rotation unit 8702 are adjusted so that the level difference between the I ′ component and the Q ′ component is minimized.

  Although not shown, the level detection unit 8704 in the case of adopting the first method of controlling the reception-side local oscillation unit 474 and changing the phase of the reproduced carrier signal Lo_RX (carrier signal to the frequency mixing unit 472) that is the output thereof. The control method is preferably as follows. First, the input to the level detection unit 8704 is only the output signal I of the filter processing unit 8410_I for the I-axis component, and the second is the output signal Q of the filter processing unit 8410_Q for the Q-axis component. The configuration example may be any of the third configuration example in which both the output signal I of the filter processing unit 8410_I for the I-axis component and the output signal Q of the filter processing unit 8410_Q for the Q-axis component are used. When both the signal I and the signal Q are used, the circuit scale is larger than the case where only one is used, but the adjustment accuracy is improved.

  Here, in the case of only the first configuration example and the second configuration example, the phase correction unit 8700 maximizes the amplitude level detected by the level detection unit 8704 for the one that transmits the known pattern for adjustment. Thus, the timing signal generator 460 that controls the reception-side local oscillator 474 is controlled.

  In both of the third configuration examples, the phase correction unit 8700 increases the amplitude level detected by the level detection unit 8704 for one component (for example, I component) transmitted as a known pattern as much as possible, and transmits it as a known pattern. It is preferable that the amplitude level detected by the level detection unit 8704 for the other component (for example, the Q component) that is not present is balanced as much as possible while the amplitude level is minimized. Alternatively, paying attention to only one component (for example, I component) transmitted as a known pattern, the amplitude level detected by the level detector 8704 may be adjusted to the maximum, or transmitted as a known pattern. Focusing only on the other component (for example, Q component) that is not present, the amplitude level detected by the level detector 8704 may be adjusted to be minimum.

  Note that the problem of the influence caused by the fact that the phase of the power transmission signal of the power transmission element 423 and the phase of the power transmission signal excited by the power reception element 413 do not coincide is not limited to the case of performing communication processing. This also occurs when the load device provided in the power supply side unit and the load device provided in the power reception side unit perform synchronized processing, and a phase that suppresses the influence depending on the content of the signal processing. It is preferable to provide a processing unit.

  DESCRIPTION OF SYMBOLS 1 ... Transmission apparatus, 101B ... Electronic device, 101K ... Image acquisition device, 103 ... Semiconductor chip, 136 ... Antenna, 201B ... Memory card, 201K ... Image reproducing device, 203 ... Semiconductor chip, 236 ... Antenna, 400 ... Electronic device, 402: Non-contact power transmission device, 404: DC power supply, 408 ... Signal transmission device, 410: First unit, 411 ... Circuit board, 412 ... Power receiving device, 413 ... Power receiving element, 414 ... Power receiving power supply unit, 416 ... Reference Signal generation unit, 418 ... first communication device, 420 ... second unit, 421 ... circuit board, 422 ... power supply device, 423 ... power transmission element, 424 ... feed power supply unit, 425 ... clock generation circuit, 426 ... drive circuit, 428 ... second communication device, 440 ... modulation function unit, 442 ... frequency mixing unit, 444 ... transmission side local oscillation unit, 458 ... antenna 460: Timing signal generation unit, 470: Demodulation function unit, 472 ... Frequency mixing unit, 474 ... Reception side local oscillation unit, 478 ... Antenna, 490 ... Timing signal generation unit, 500 ... Imaging device, 8700 ... Phase correction unit, 8702: Phase rotation unit, 8704 ... Level detection unit, 9 ... Radio signal transmission path

Claims (20)

A power supply device for supplying a power transmission signal wirelessly;
A power receiving device for receiving a power transmission signal supplied from the power supply device; and
A transmission device and a reception device that transmit signals to be transmitted by radio waves,
With
The frequency of the power transmission signal transmitted between the power supply device and the power receiving device is set to be different from the frequency of the carrier signal for transmitting the signal to be transmitted by radio waves between the transmission device and the reception device. Transmission equipment.   The power supply device and one of the transmission device and the reception device are arranged in the power supply side unit, and the power reception device and the other of the transmission device and the reception device are arranged in the power reception side unit. Item 2. The transmission device according to Item 1. A power transmission signal received by the power receiving device is used as a reference signal for a carrier signal used for signal transmission by one of the transmitting device and the receiving device that operates by receiving the supply of power generated by the power receiving device. A reference signal generation unit for generating the reference signal,
The transmission apparatus according to claim 1 or 2, wherein the power supply apparatus and the other of the transmission apparatus and the reception apparatus perform processing in charge of each based on the same reference signal. Provided with multiple sets of power supply devices and power receiving devices,
The transmission apparatus according to claim 3, wherein a reference signal generation unit is provided for each of the plurality of power receiving apparatuses.   5. The transmission apparatus according to claim 3, wherein the reception apparatus includes a timing signal generation unit that generates a carrier signal for performing demodulation processing by a synchronous detection method based on the reference signal generated by the reference signal generation unit. .   6. The signal transmission device according to claim 1, wherein the signal transmission device includes a plurality of signal transmission systems including a transmission device and a reception device, and one transmission device or one reception device is also used as a plurality of signal transmission systems. The transmission apparatus as described in any one.   6. The transmission apparatus according to claim 1, wherein a plurality of signal transmission systems each including a transmission apparatus and a reception apparatus are provided, and signal transmission is performed by frequency division multiplexing.   The transmission apparatus according to any one of claims 1 to 7, wherein signal transmission is performed between a transmission apparatus and a reception apparatus using a carrier signal in a millimeter wave band. A first load device that receives a supply of power and performs predetermined signal processing;
A power supply device that wirelessly supplies power by generating a power transmission signal based on a reference signal that is a reference for signal processing in the first load device and transmitting the signal wirelessly;
A power receiving device for receiving a power transmission signal supplied from the power supply device;
A second load device for receiving a power transmission signal from the power receiving device and performing predetermined signal processing;
A reference signal generating unit that generates a reference signal serving as a reference for signal processing in the second load device based on the power transmission signal received by the power receiving device;
A transmission apparatus comprising: Both the power supply device and the first load device perform the processing that they are in charge of based on the same reference signal,
The transmission device according to claim 9, wherein the second load device performs predetermined signal processing in synchronization with signal processing in the first load device based on the reference signal generated by the reference signal generation unit.   The phase processing part which suppresses the influence accompanying the phase of the power transmission signal which a power supply apparatus produces | generates, and the phase of the power transmission signal which a power receiving apparatus receives does not correspond, Claims 4, 4, 5, The transmission apparatus according to any one of claims 9 and 10.   The transmission device according to any one of claims 1 to 11, further comprising a plurality of power receiving devices that generate power by commonly using a power transmission signal generated from one power supply device. One power supply unit with a plurality of power supply devices is provided,
The transmission according to any one of claims 1 to 12, wherein each of the plurality of power supply apparatuses includes a power receiving unit including one power reception apparatus corresponding to any one of the plurality of power supply apparatuses. apparatus. Each of the plurality of power supply devices includes a power transmission element that emits a power transmission signal and a power supply unit that drives the power transmission element.
Each of the plurality of power receiving devices includes a power receiving element that receives a power transmission signal and a power receiving power source that generates power based on the power transmission signal received by the power receiving element.
Each of the plurality of power transmission elements is arranged in a flat shape so as to be a coaxial core,
Corresponding elements of a plurality of power transmitting elements and a plurality of power receiving elements are arranged on the same axis,
The transmission device according to claim 13, wherein each of the plurality of power supply units drives a corresponding power transmission element at a different frequency.   The transmission device according to claim 13 or 14, wherein each of the plurality of power supply units controls on / off of driving of the corresponding power transmission element separately.   The transmission device according to any one of claims 1 to 15, wherein the power supply device and the power reception device transmit power in a non-contact manner using a resonance phenomenon or a resonance phenomenon. A power supply device for supplying power wirelessly;
A power receiving device for receiving the power supplied from the power supply device;
A transmission device that wirelessly transmits a signal to be transmitted;
A receiving device for receiving a transmission target signal transmitted from the transmitting device;
With
The transmission device, the power supply device, the power reception device, and the reception device are arranged in one housing, or the one and the power supply device arranged on the power supply device side of the transmission device and the reception device are The one disposed in the first housing and the power receiving device, the transmitting device, and the receiving device disposed on the power receiving device side is disposed in the second housing,
An electronic device in which the frequency of a power transmission signal transmitted between a power supply device and a power reception device is set different from the frequency of a carrier signal that transmits a signal to be transmitted by radio waves. A first load device for receiving a power supply and performing predetermined signal processing;
A power supply device that wirelessly supplies power by wirelessly transmitting a power transmission signal generated based on a reference signal that is a reference for signal processing in the first load device;
A power receiving device for receiving a power transmission signal supplied from the power supply device;
A second load device that receives a power transmission signal from the power receiving device and performs predetermined signal processing; and
A reference signal generating unit that generates a reference signal serving as a reference for predetermined signal processing in the second load device based on the power transmission signal received by the power receiving device;
With
The first load device, the power supply device, the power receiving device, and the second load device are arranged in one housing, or the first load device and the power supply device are in the first housing. An electronic device in which the power receiving device and the second load device are arranged in a second housing. A power transmission signal emitted from the power supply device is wirelessly transmitted to the power reception device, and power is generated in the power supply device based on the power transmission signal and supplied to the transmission device or the reception device.
While setting the frequency of the power transmission signal and the frequency of the carrier signal for signal transmission to be different, the signal to be transmitted between the transmitting device and the receiving device is transmitted using the carrier signal in the radio frequency band. Transmission method to be transmitted.   A power transmission signal generated based on a reference signal serving as a reference for signal processing in the first load device is wirelessly transmitted to supply power to the load device on the power receiving side, and on the power receiving side based on the received power transmission signal Transmission method for generating a reference signal serving as a reference for predetermined signal processing in the load device.

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