WO2014015779A1

WO2014015779A1 - Method and apparatus for achieving compatibility of wireless charging and near field communication (nfc)

Info

Publication number: WO2014015779A1
Application number: PCT/CN2013/079823
Authority: WO
Inventors: 顾云峰
Original assignee: 中兴通讯股份有限公司
Priority date: 2012-07-26
Filing date: 2013-07-22
Publication date: 2014-01-30
Also published as: CN102780515B; CN102780515A

Abstract

Disclosed is a method for achieving compatibility of wireless charging and near field communication (NFC), the method comprises: setting an antenna which is used for receiving a wireless charging signal and an NFC signal on a communication terminal; said communication terminal judges whether the signal which is received currently by the antenna is a wireless charging signal or an NFC signal by using a decision circuit module; if the currently received signal is a wireless charging signal, the decision circuit module transmits the charging signal received by the antenna to a wireless receiving circuit module of the communication terminal for receiving wireless electric energy; if the currently received signal is an NFC signal, the decision circuit module implements communication of an NFC module of the communication terminal via the antenna. Also disclosed is an apparatus for achieving compatibility of wireless charging and the NFC. According to the invention, coexistence and compatibility of the wireless charging and the NFC are effectively achieved; meanwhile, the problem that a coil is shared by the wireless charging and the NFC is solved.

Description

Method and device compatible with wireless charging and NFC

The present invention relates to the field of wireless charging and Near Field Communication (NFC), and more particularly to a method and apparatus compatible with wireless charging and NFC. Background technique

At present, mobile terminals are being used more and more widely. The functions of the terminals are already very powerful, full of entertainment, can listen to songs, watch TV, and can access the Internet. In the process of using the mobile terminal, due to the limitation of the battery capacity, it was found that the battery was quickly used up, and it was often necessary to charge the battery. The emergence of wireless charging technology represented by electromagnetic induction has brought convenience to consumers. It is convenient to charge the mobile phone through the wireless charging device, so that the consumer can get rid of the line.

NFC, also known as short-range wireless communication, is a short-range wireless communication technology that allows non-contact point-to-point data transmission (within ten centimeters) to exchange data between electronic devices. This technology evolved from Radio Frequency Identification (RFID) and is backward compatible with RFID. It was first promoted by Philips, Nokia and Sony, and is mainly used in handheld devices such as mobile phones. Because near-field communication has natural security, NFC technology is considered to have great application prospects in the field of mobile payment. At present, NFC is using more and more frequently in the field of mobile payment.

The wireless charging technology represented by electromagnetic induction is the current mainstream wireless charging technology. The wireless charging alliance organization has developed the Qi standard to regulate wireless charging technology. The basic structure is shown in Figure 1. It is mainly divided into two parts: the transmitting end and the receiving terminal. Among them, the transmitting end and the receiving terminal realize the electric energy transfer through the induction coil. The block diagram of the receiving terminal is shown in Figure 2. After receiving the power, the receiving coil transmits the power to the receiving circuit, and the receiving circuit completes the rectifier voltage regulation, etc. And the like, outputting a stable DC voltage used by the receiving terminal for charging. The circuit block diagram of NFC is shown in Figure 3. It includes NFC chip circuit, matching circuit, and NFC antenna coil.

The current technology, when using both wireless charging and NFC, uses two separate coil antennas, one for wireless charging and the other for NFC. The area of the two coils will require a lot of space. Under the trend of more and more delicate mobile phones, space is a valuable resource for mobile terminals, and when the two coils are placed together, there is interference between them. Performance of each other. Summary of the invention

It is an object of embodiments of the present invention to provide a method compatible with wireless charging and NFC, which solves the above problems in the prior art by sharing one coil antenna by wireless charging and NFC.

Another object of embodiments of the present invention is to provide an apparatus for carrying out the above method.

According to a first aspect of the embodiments of the present invention, a method for compatible wireless charging and near field communication is provided, the method comprising:

Setting an antenna for receiving a wireless charging signal and a near field communication NFC signal on the communication terminal;

The communication terminal uses the determination circuit module to determine that the antenna currently receives a wireless charging signal or an NFC signal;

If it is determined that the wireless charging signal is currently received, the determining circuit module transmits the charging signal received by the antenna to the wireless charging receiving circuit module of the communication terminal to receive the wireless power;

If it is determined that the NFC signal is currently received, the decision circuit module causes the NFC module of the communication terminal to communicate via the antenna.

Preferably, the determining that the antenna is currently receiving the wireless charging signal or the NFC signal comprises: determining, by the determining circuit module, a frequency of a signal currently received by the antenna, and determining, according to the signal frequency, that the signal currently received by the antenna is a wireless charging signal Or NFC signal. Preferably, the determining antenna currently receives the wireless charging signal or the NFC signal, comprising: the determining circuit module identifying the wireless charging and the communication content of the NFC in the initialization, and determining, according to the communication content, that the antenna is currently receiving The signal is a wireless charging signal or an NFC signal.

Preferably, the determining circuit module comprises:

An antenna signal identifying unit that acquires a recognition result of a signal received by the antenna; and the device according to the antenna signal identifying unit includes: an antenna, a determining circuit module, a wireless charging receiving circuit module, and an NFC module;

An antenna, disposed on the communication terminal, configured to receive wireless charging signals and near field communication

NFC signal;

The determining circuit module is disposed on the communication terminal, configured to determine that the antenna is currently receiving a wireless charging signal or an NFC signal; if it is determined that the wireless charging signal is currently received, transmitting the charging signal received by the antenna to the wireless charging receiving circuit module; If it is determined that the NFC signal is currently received, the NFC module is caused to communicate via the antenna;

a wireless charging receiving circuit module, disposed on the communication terminal, configured to receive radio energy;

The NFC module is set on the communication terminal and configured for NFC communication.

Preferably, the determining circuit module includes: an antenna signal identifying unit and a switching unit;

An antenna signal identification unit configured to identify which signal the antenna receives;

The switching unit is configured to switch according to the recognition result of the antenna signal recognition unit.

Compared with the prior art, the technical effect of the embodiment of the present invention is that the method and the device according to the embodiments of the present invention can effectively implement the wireless charging and the NFC coexistence compatibility, and can solve the problem that the wireless charging and the NFC share the same coil. DRAWINGS

Figure 1 is a block diagram of the wireless charging principle;

2 is a schematic block diagram of a wireless charging receiving terminal; Figure 3 is a block diagram of the NFC circuit;

4 is a schematic block diagram of an apparatus compatible with wireless charging and near field communication according to an embodiment of the present invention; FIG. 5 is a block diagram showing an embodiment of an apparatus compatible with wireless charging and near field communication according to an embodiment of the present invention;

6 is a schematic diagram of a method of compatible wireless charging and near field communication in accordance with an embodiment of the present invention. detailed description

The implementation of the technical solution will be further described in detail below with reference to the accompanying drawings:

FIG. 4 shows a device compatible with wireless charging and near field communication according to an embodiment of the present invention, as shown in FIG. 4, including: an antenna, a determination circuit module, a wireless charging receiving circuit module, and an NFC module;

An antenna, disposed on the communication terminal, configured to receive a wireless charging signal and a near field communication NFC signal, and the antenna may be the receiving coil in FIG. 4;

FIG. 5 shows a specific embodiment of the device compatible with the wireless charging and the near field communication shown in FIG. 4, which differs from FIG. 5 only in that the determining circuit module includes: an antenna signal identifying unit and a switching unit;

An antenna signal identification unit configured to identify which signal the antenna is received by;

The switching unit is configured to perform switching according to the recognition result of the antenna signal recognition unit. The switching unit is configured as a switch controlled by an antenna signal recognition unit.

Wherein the antenna identification unit and the receiving coil of the antenna can be wired or wireless Way to connect.

In Fig. 4 and Fig. 5, the receiving coil is a carrier shared by the wireless charging receiving circuit module and the NFC module, and can be used as a receiving coil for wireless charging or an antenna for NFC as needed.

The determination circuit module is an intelligent determination module configured to determine whether the currently required function is wireless charging or NFC, and the determination is based on the transmitted signal.

The wireless charging receiving module is configured to receive wireless energy transmitted from the receiving coil, and process the output into a stable DC power signal to the mobile terminal.

The NFC module is configured to perform NFC related functions.

Specifically, the embodiment of the present invention utilizes the decision circuit module to identify the functions that need to be implemented, realizes that the wireless charging and the NFC share one coil, saves the area, and solves the problem of mutual interference between the coils.

The decision circuit module intelligently recognizes the currently performed business functions, and there are various implementation methods. For example, the frequency difference between the received signals can be recognized, the frequency of the wireless charging and the NFC are different, and the determination circuit module detects the frequency to identify the current service. It can also be identified by the communication signal. The NFC communication starts to have a communication process with the card reader. During the wireless charging start phase, there is also a communication confirmation process between the receiving end and the transmitting end. The wireless charging and NFC communication content are different. The determining circuit module determines whether it is currently a wireless charging or an NFC function according to different communication transmission signals.

After the completion of the determination, when the recognition result is the wireless charging function, the determination circuit module is connected to the coil and the wireless charging receiving module, the coil and the NFC module are in an off state, and the coil is used as a receiving coil for wireless charging;

When the recognition result is the NFC function, the determination circuit module communicates with the coil and the NFC module, the coil and the wireless charging acceptance module are disconnected, and the coil acts as an antenna of the NFC.

By judging the circuit module, the NFC and the wireless charging time-sharing and the coils can be connected, so that the coils realize their respective functions in their respective functions, and do not affect each other, effectively sharing the coils. The working principle and the whole implementation process of the device shown in FIG. 4 and FIG. 5 are as follows: The determining circuit module intelligently identifies the current business mode.

The decision circuit module is configured to implement the discriminating process in a plurality of ways, for example, based on the transmitted signal, to intelligently determine whether the wireless charging or the NFC communication is currently performed. In the initial stage, there is a process of communication initialization between the NFC and the reader between the wireless charging sender and the receiver, but the communication content of the wireless charging and the NFC is different, and the determining circuit module transmits according to different communications. The signal determines whether it is currently wireless charging or NFC. It is also possible to determine whether the current wireless charging or NFC is performed according to the frequency of the transmitted signal. The standard communication frequency of the NFC is 13.56M, and the wireless charging frequency is about 100K. The business mode is intelligently determined based on the frequency difference between the two signals.

When the recognition result is the wireless charging function, the determining circuit module is connected to the coil and the wireless charging receiving module, the coil and the NFC module are in an off state, and the coil is used as a receiving coil for wireless charging; when the recognition result is an NFC function, the determining circuit module is connected to the coil With the NFC module, the coil and wireless charging receiver module are disconnected and the coil acts as an NFC antenna.

By judging the circuit module, the NFC and the wireless charging time-sharing interleaving and the common coil can be connected, so that the coils realize their respective functions in their respective functions, and do not affect each other, effectively sharing the common coil.

FIG. 6 shows a method for compatible wireless charging and near field communication according to an embodiment of the present invention. As shown in FIG. 6, the method includes the following steps:

An antenna dedicated to receiving the wireless charging signal and the NFC signal, such as the coils shown in FIGS. 4 and 5, is disposed on the communication terminal;

The communication terminal uses its decision circuit module to determine whether the antenna is currently receiving a wireless charging signal or an NFC signal;

If it is determined that the wireless charging signal is currently received, the determining circuit module transmits the charging signal received by the antenna to the wireless charging receiving circuit module of the communication terminal to receive the wireless energy; If it is determined that the NFC signal is currently received, the decision circuit module causes the NFC module of the communication terminal to communicate via the antenna.

The determining, by the determining antenna, that the wireless charging signal or the NFC signal is: the determining circuit module determines that the currently received signal of the antenna is a wireless charging signal or an NFC signal by detecting a frequency of the signal currently received by the antenna;

Alternatively, the decision circuit module acquires the communication content identifying the wireless charging and the NFC in the initialization, and determines, based on the communication content, that the signal currently received by the antenna is a wireless charging signal or an NFC signal.

For example, the determining circuit module determines that the currently received signal of the antenna is a wireless charging signal or an NFC signal by detecting the frequency of the signal currently received by the antenna. The determining circuit module obtains the frequency of the signal by measuring the received signal frequency. If the frequency is 13.56M, it is judged as NFC signal; if the frequency is 100K, it is determined as wireless charging signal.

The determining whether the signal currently received by the antenna is a wireless charging signal or an NFC signal according to the communication content may be: when the packet header is 10XXXXXX, it is determined as NFC communication; when the packet header is 01XXXXXX, it is determined to be wireless charging.

The determination circuit module includes: an antenna signal identification unit configured to acquire a recognition result of a signal received by the antenna; and a switching unit that performs switching according to the recognition result of the antenna signal recognition unit.

When the antenna signal identification unit recognizes the signal received by the antenna as a wireless charging signal, the switching unit is controlled to connect the antenna to the wireless charging receiving circuit module, and disconnect the antenna from the NFC module; when the antenna signal identifying unit When the recognition result of the signal received by the antenna is an NFC signal, the switching unit is controlled to connect the antenna to the NFC module, and the connection between the antenna and the wireless charging receiving circuit module is cut off.

Although the embodiments of the present invention have been described in detail above, the embodiments of the present invention are not limited thereto, and those skilled in the art can make various modifications according to the principles of the embodiments of the present invention. Cause Therefore, modifications made in accordance with the principles of the embodiments of the present invention should be understood as falling within the scope of the present invention. Industrial applicability

The method and device for wireless charging and NFC are provided by the embodiment of the present invention. In the embodiment of the present invention, the communication terminal determines that the antenna currently receives a wireless charging signal or an NFC signal; if it is determined that the wireless charging signal is currently received, Then, the charging signal received by the antenna is transmitted to the wireless charging receiving circuit module of the communication terminal to receive the wireless power; if it is determined that the NFC signal is currently received, the NFC module of the communication terminal is communicated via the antenna. The invention can effectively realize the wireless charging and the NFC coexistence compatibility, and can solve the problem that the wireless charging and the NFC share the same coil.

Claims

claims

1. A method compatible with wireless charging and near field communication NFC. The method includes: setting an antenna on the communication terminal to receive wireless charging signals and near field communication NFC signals;

The communication terminal uses the determination circuit module to determine whether the antenna is currently receiving a wireless charging signal or an NFC signal;

If it is determined that what is currently being received is a wireless charging signal, the determination circuit module transmits the charging signal received by the antenna to the wireless charging receiving circuit module of the communication terminal to receive wireless power;

If it is determined that the NFC signal is currently received, the determination circuit module causes the NFC module of the communication terminal to communicate via the antenna.

2. The method according to claim 1, wherein the determining whether the antenna is currently receiving a wireless charging signal or an NFC signal includes: the determining circuit module detects the signal frequency currently received by the antenna, and determines the signal frequency according to the signal frequency. The signal currently received by the antenna is a wireless charging signal or an NFC signal.

3. The method according to claim 1, wherein the determining whether the antenna is currently receiving a wireless charging signal or an NFC signal includes: the determining circuit module identifies the communication content of wireless charging and NFC during initialization, according to the The communication content determines whether the signal currently received by the antenna is a wireless charging signal or an NFC signal.

4. The method according to claim 2 or 3, wherein the determination circuit module includes: an antenna signal identification unit that obtains an identification result of what kind of signal an antenna receives; and switching according to the identification result of the antenna signal identification unit. switching unit.

5. The method according to claim 4, wherein when the antenna signal identification unit identifies the signal received by the antenna as a wireless charging signal, the switching unit is controlled to connect the antenna to the wireless charging receiving circuit module and cut off the antenna. Connection with NFC module.

6. The method according to claim 4, wherein when the antenna signal identification unit identifies the signal received by the antenna as an NFC signal, the switching unit is controlled to connect the antenna to the NFC module and cut off the antenna from wireless charging reception. Connection of circuit modules.

7. The method according to claim 4, wherein the antenna is a receiving coil for receiving wireless signals.

8. The method according to claim 4, wherein the switching unit is a switching switch controlled by an antenna signal identification unit.

9. A device compatible with wireless charging and near field communication, the device includes: an antenna, a determination circuit module, a wireless charging receiving circuit module and an NFC module; wherein,

The antenna is installed on the communication terminal and is configured to receive wireless charging signals and near field communication NFC signals;

The determination circuit module is provided on the communication terminal and is configured to determine whether the antenna is currently receiving a wireless charging signal or an NFC signal; if it is determined that the currently receiving is a wireless charging signal, then transmit the charging signal received by the antenna to the wireless charging receiving circuit module; If it is determined that what is currently being received is an NFC signal, the NFC module is caused to communicate via the antenna;

The wireless charging receiving circuit module is provided on the communication terminal and is configured to receive wireless power; the NFC module is provided on the communication terminal and is configured to perform NFC communication.

10. The device according to claim 9, wherein the determination circuit module includes: an antenna signal identification unit and a switching unit; wherein,

The antenna signal identification unit is configured to identify what kind of signal the antenna receives;

The switching unit is configured to perform switching according to the recognition result of the antenna signal recognition unit.