TWI607615B - Wireless charging method and charge controller thereof - Google Patents

Description

Wireless charging method and charging controller thereof

The present invention relates to a wireless charging method and a charging controller thereof, and more particularly to a wireless charging method capable of performing selective wireless charging and a charging controller thereof.

With the popularity of portable electronic devices, such as mobile devices, smart phones and tablets, the demand for charging devices is increasing, especially in public places where charging is required. In addition, since most people want to be able to reduce the carrying of the cable as much as possible, wireless charging technology came into being. When the wireless charging technology is applied to an electronic device, an electronic device having a power receiver is placed on a wireless charging device (for example, a power base station (PBS) including a power transmitter), and is transmitted through The wireless charging device performs charging. Therefore, the current trend is to provide services and functions for wireless charging in public places, such as cafes, shops, train stations, airports, restaurants, etc., so that people can easily find a wireless power supply to provide electronic device charging services. With demand.

In the field of wireless charging technology, global organizations such as Alliance for Wireless Power (A4WP), Wireless Power Consortium, and Power Matters Alliance (PMA) have defined various types of wireless charging. The specification, which defines wireless power, can be transmitted from a Wireless Charger Transmitter (WCT) to a Wireless Charger Receiver (WCR) located within a certain distance without the use of physical connections. The current wireless charging mechanism is that any charging device can be paired and is performed in a "first come, first win" manner, that is, when the wireless charging receiver is close to the wireless charging transmitter and the wireless charging transmitter is still usable. When the power transmitting end (ie, not occupied by other devices) is used, charging can be performed.

However, the existing specifications are for the power supply itself, but for other applications without any consideration. For example, there is no way to charge consumers who use wireless charging, and there is no way to charge a particular device with charging authority. In view of this, it is necessary to add a selective charging mechanism to existing wireless charging technologies and specifications to meet the business needs of vendors providing wireless charging services.

Accordingly, it is a primary object of the present invention to provide a wireless charging method and a charging controller thereof that can perform selective wireless charging to implement various wireless charging applications and services by determining charging authority.

The invention discloses a selective wireless charging method for a power receiving device of a wireless charging system. The wireless charging method includes searching for a broadcast signal sent by a power supply device of the wireless charging system; when detecting the broadcast signal, determining one of the power supply device and the power receiving device according to the strength of the broadcast signal a distance; when the distance is less than a threshold, establishing a connection with the power supply device, and informing the power supply device that the power receiving device is to be charged; and when the power receiving device is determined by the power supply device to have a charging authority, starting from The power supply device receives power.

The invention further discloses a selective wireless charging method for a power supply device of a wireless charging system. The wireless charging method includes continuously transmitting a broadcast signal; receiving a connection request from one of the power receiving devices of the wireless charging system to establish a connection with the power receiving device; and determining whether the power receiving device has a charging authority, and It is determined whether or not to charge the power receiving device.

The invention further discloses a selective wireless charging method for a power receiving device of a wireless charging system. The wireless charging method includes: continuously transmitting a broadcast signal when the power receiving device is to be charged; receiving a connection request from one of the power supply devices of the wireless charging system to establish a connection with the power supply device; and informing the power supply The device is to be charged; and when the power receiving device is determined by the power supply device to have a charging authority, power is received from the power supply device.

The invention further discloses a selective wireless charging method for a power supply device of a wireless charging system. The wireless charging method includes searching for a broadcast signal sent by a power receiving device of the wireless charging system; when detecting the broadcast signal, determining the presence of the power receiving device according to the strength of the broadcast signal, and determining the power receiving device a distance from the power supply device; when the distance is less than a threshold value, establishing a connection with the power receiving device; and determining, according to the broadcast signal, whether the power receiving device has a charging authority, and determining whether to The power receiving device charges.

The invention further discloses a charging controller for a power supply device of a wireless charging system for performing a selective wireless charging method. The charging controller includes a communication unit, a processing device and a switch. The communication unit can be configured to send a broadcast signal or detect a broadcast signal from one of the power receiving devices of the wireless charging system, and establish a connection with the power receiving device for communication. The processing device is coupled to the communication unit and configured to determine a distance between the power supply device and the power receiving device, and determine whether to charge the power receiving device according to whether the power receiving device has a charging authority, and the processing device Control the operation of the communication unit. The switch is coupled to the processing device, and the switch is turned on when the processing device determines that the power receiving device has the charging authority to charge the power receiving device.

Please refer to FIG. 1. FIG. 1 is a schematic diagram of a wireless charging system 10 according to an embodiment of the present invention. A wireless charging system can include at least one power supply device and at least one power receiving device that can be charged by the power supply device. For convenience of explanation, in FIG. 1, the wireless charging system 10 is simply composed of a power supply device 100 and power receiving devices 102, 104, and 106. The power supply device 100 can transmit a broadcast signal for the power receiving devices 102, 104, and 106 to detect and search. The power supply device 100 can be a Wireless Charger Transmitter (WCT) for providing wireless power to the power receiving devices 102, 104, and 106 that need to be charged, wherein the wireless charging transmitter includes a power transmitter or a Power transmission module for digital/analog wafers. The power receiving devices 102, 104, and 106 can be any electronic device, such as a mobile phone, a notebook computer, a tablet computer, an e-book, or a portable computer system. On the other hand, the power receiving devices 102, 104, and 106 can also be any A device that uses a battery as its power source, such as a wearable computer device, a wearable medical device, a portable MP3 player, an earphone, a smart watch, a smart eyeglass, or an electric car; and further, the power receiving device 102, 104 and 106 may also be a household appliance such as a washing machine, a television, or the like. These power receiving devices 102, 104, and 106 may directly contact the power supply device 100, or may be wirelessly charged within a certain distance of the power supply device 100. The power receiving devices 102, 104, and 106 can receive wireless power from the power supply device 100 through electromagnetic induction, so that the batteries of the power receiving devices 102, 104, and 106 can be charged without using any wire connection.

Please refer to FIG. 2, which is a schematic diagram of an embodiment of a power supply device 100. As shown in FIG. 2, the power supply device 100 includes a wireless charging module 200, a power supply terminal 202, and a charging controller 210. The wireless charging module 200 can be used to provide wireless power, which can be composed of hardware such as a coil and a driving circuit. The power supply terminal 202 can output power to the wireless charging module 200 for power supply under the control of the charging controller 210. The power supply terminal 202 can be connected to any power output device, such as a DC adaptor, and a voltage regulator. Voltage regulator or power supply.

The charging controller 210 includes a communication unit 212, a processing device 214, a storage unit 216, and a switch 218. The communication unit 212 can be a wireless transceiver that can transmit and receive wireless signals (such as data, signals, messages, and/or packets) according to the processing result of the processing device 214. For example, the communication unit 212 can be used to transmit broadcast signals or detect broadcast signals from the power receiving devices 102, 104, and 106, and establish connections with the power receiving devices 102, 104, and 106 for communication. The processing device 214 is coupled to the communication unit 212 and can be used to determine the distance between the power supply device 100 and the power receiving devices 102, 104, and 106 to charge when the power receiving devices 102, 104, and 106 are close to each other. The processing device 214 determines whether or not to charge the power receiving devices 102, 104, and 106 based on whether or not the power receiving devices 102, 104, and 106 have charging authority. In addition, the processing device 214 can be used to control the operation of the modules such as the communication unit 212 and the switch 218 in the power supply device 100. The processing device 214 can be any type of processing device, such as a Micro Control Unit (MCU), a Microprocessor, or an Application Specific Integrated Circuit (ASIC). The switch 218 is coupled to the processing device 214 and can be turned on when the processing device 214 determines that a power receiving device has charging authority, so that the wireless charging module 200 can receive power from the power supply terminal 202 to charge the power receiving device. The switch 218 can be implemented by a relay, but is not limited thereto. The storage unit 216 can be any data storage device for storing a code and reading and executing the code through the processing device 214 for performing various operations. For example, the storage unit 216 can be a read-only memory (ROM), a flash memory, a random-access memory (RAM), and a CD-ROM. The body (CD-ROM/DVD-ROM), magnetic tape, hard disk, optical data storage device, and the like are not limited thereto.

It should be noted that in this example, the charging controller is built in the power supply device, but in other embodiments, the charging controller can also be externally connected to the power supply device through a connector. The connector can be any connected device, such as Universal Serial Bus (USB), Micro-USB, two-wire connector, DC power connector (DC jack) )Wait. Generally, the charging controller can be coupled between the power supply device and the power supply terminal, so any connection interface through the power source can be used. In addition, in order to meet the needs of various power supply devices, the connector used in the charge controller may be a replaceable connector, for example, if the power supply input and the power output of the charge controller are replaceable The charger controller can be applied to wireless charging devices with any connector interface. In this case, the user only needs to set a charging controller on the wireless charging device (for example, a charging controller is connected between the wireless charging device and the power supply terminal) to achieve the effect of selective charging.

Please refer to FIG. 3, which is a schematic diagram of an embodiment of the power receiving device 102, 104 or 106. As shown in FIG. 3, the power receiving device includes a wireless receiving module 300 and a charging controller 310. The wireless receiving module 300 can be used to receive wireless power, which can be composed of hardware such as a coil and a driving circuit. The charging controller 310 includes a communication unit 312, a processing device 314, and a storage unit 316. The communication unit 312 can be a wireless transceiver that can transmit and receive wireless signals (such as data, signals, messages, and/or packets) according to the processing result of the processing device 314. For example, the communication unit 312 can be used to transmit a broadcast signal or detect a broadcast signal from the power supply device 100 and establish a connection with the power supply device 100 for communication. The processing device 314 can be used to determine the distance between the power receiving device 102, 104 or 106 and the power supply device 100 to communicate with the power supply device 100 when the power supply device 100 is approaching. Processing device 314 can be any type of processing device, such as a microcontroller, microprocessor or application-specific integrated circuit, and the like. The storage unit 316 can be any data storage device for storing a code and reading and executing the code through the processing device 314 for performing various operations. For example, the storage unit 316 can be a read-only memory, a flash memory, a random access memory, a CD-ROM, a magnetic tape, a hard disk, an optical data storage device, and the like, without being limited thereto.

It should be noted that, if the power receiving device is a wireless communication device having a computing function, the communication unit 312, the processing device 314, and the storage unit 316 in the charging controller 310 can adopt a built-in module of the wireless communication device, and the corresponding module is added. The algorithm or application can perform the selective charging method of the present invention. In this case, the power receiving device does not need to be provided with additional hardware, which has the advantage of cost saving. On the other hand, if the power receiving device is a device that does not have a wireless communication or computing function (for example, a home appliance, an automobile, etc.), it is necessary to additionally provide a communication unit 312, a processing device 314, or a storage unit 316 for performing the selectivity of the present invention. Charging method.

Please refer to FIG. 4, which is a flowchart of a process 40 according to an embodiment of the present invention. The process 40 can be used in a power receiving device of a wireless charging system, such as the power receiving device 102, 104 or 106 shown in FIG. 1, for performing a selective wireless charging method. In an embodiment, the process 40 can be implemented in the charging controller 310 in the power receiving device 102, which includes the following steps:

Step 400: Start.

Step 402: Search for one of the broadcast signals sent by the power supply device 100 of the wireless charging system 10.

Step 404: When detecting the broadcast signal, determine a distance between the power supply device 100 and the power receiving device 102 according to the strength of the broadcast signal.

Step 406: When the distance is less than a critical value, establish a connection with the power supply device 100, and inform the power supply device 100 that the power receiving device 102 is to be charged.

Step 408: When the power receiving device 102 is determined to have a charging authority, power is received from the power supply device 100.

Step 410: End.

According to the process 40, in the wireless charging system 10, the power supply device 100 continuously transmits the broadcast signal. When one of the electronic devices corresponding to the power receiving device 102 needs to be charged, the power receiving device 102 starts to search for the broadcast signal sent by the power supply device 100 (step 402). The broadcast signal may include a data type, and the power receiving device 102 may determine the presence of the power supply device 100 according to the data type. In detail, the data type may be any encrypted or non-encrypted packet or material that can be identified by the powered device 102. When the power receiving device 102 receives the identifiable data type, it can be known that the power supply device 100 is present nearby, and the power receiving device 102 determines that the power supply device 100 can be paired with it and provide power. The power receiving device 102 can display the information of the power supply device 100 existing nearby, and the user can move the power receiving device 102 to be close to the power supply device 100 and enter the chargeable range of the power supply device 100. Next, the power receiving device 102 can determine the distance between the power supply device 100 and the power receiving device 102 based on the strength of the broadcast signal (step 404). In an embodiment, the broadcast signal may include a Radio Signal Strength Indication (RSSI), and the power receiving device 102 may determine the signal strength according to the value indicated by the wireless signal strength, thereby determining the power supply device 100 and the power receiving device 102. The distance between them. In general, the stronger the signal strength, the shorter the distance between the two. Further, the power receiving device 102 can set a threshold (for example, setting the chargeable range of the power supply device 100 to a critical value), and when determining that the distance between the power supply device 100 and the power receiving device 102 is less than a critical value, the active power supply device 100 establishes a connection and informs the power supply device 100 that the power receiving device 102 is to be charged (step 406). For example, the power receiving device 102 can send a connection request to the power supply device 100. After the power supply device 100 accepts the connection request, the two can be connected to each other and communicate. The connection may be implemented by the communication unit 212 in the power supply device 100 and the communication unit 312 in the power receiving device 102. The connection may be through a wireless communication technology, and the connection manner may be any specification communication protocol, such as Bluetooth (Bluetooth). ), Bluetooth Low Energy (BLE), Wireless Fidelity (Wi-Fi) or Radio Frequency (RF) signals, but not limited to.

Then, through the connection and communication between the power supply device 100 and the power receiving device 102, it can be further determined whether the two are compatible. The compatible power supply device 100 and the power receiving device 102 conform to the same wireless charging specification, that is, the power supply device 100 can charge the power receiving device 102. Next, the power supply device 100 can determine whether the power receiving device 102 has a charging authority and determine whether to charge the power receiving device 102 accordingly. The power supply device 100 can determine whether the power receiving device 102 has charging authority based on information exchanged during the communication process. When the power receiving apparatus 102 is judged to have the charging authority, the power supply apparatus 100 can start power supply, so that the power receiving apparatus 102 can receive power from the power supply apparatus 100 (step 408). Conversely, when the power supply device 100 determines that the power receiving device 102 does not have the charging authority, the power receiving device 102 is not charged.

According to the description of the flow 40 described above, in conjunction with the power supply device 100 of FIG. 2, the processing device 214 of the power supply device 100 can determine whether or not the power receiving device 102 has charging authority to determine whether to open the switch 218. That is to say, the power supply device 100 can achieve selective charging by controlling the opening and closing of the switch 218. When the processing device 214 determines that the power receiving device 102 has charging authority, the switch 218 can be turned on so that power can be transmitted from the power supply terminal 202 to the wireless charging module 200 and then transmitted to the power receiving device 102. When the processing device 214 determines that the power receiving device 102 does not have the charging authority, the switch 218 is turned off, and the wireless charging module 200 cannot transmit the wireless power. It should be noted that the power supply device 100 of FIG. 2 is only one of the various embodiments of the present invention. In another embodiment, the switch 218 may be built in the wireless charging module 200 or directly by the processing device 214. The wireless charging module 200 is controlled to determine whether the wireless charging module 200 transmits power, without being limited thereto.

The operation mode and related description of the power supply device 100 in the above process 40 can be summarized as a process 50, as shown in FIG. The process 50 can be used in a power supply device of a wireless charging system, such as the power supply device 100 shown in FIG. 1, for performing a selective wireless charging method. The process 50 can be implemented in the charging controller 210 in the power supply device 100, which includes the following steps:

Step 500: Start.

Step 502: Continuously send a broadcast signal.

Step 504: Receive a connection request from the power receiving device 102 of the wireless charging system 10 to establish a connection with the power receiving device 102.

Step 506: Determine whether the power receiving device 102 has a charging authority, and accordingly determine whether to charge the power receiving device 102.

Step 508: End.

The detailed operation of the process 50 is described in the above paragraphs relating to the process 40 and will not be described here.

Further, during the charging process, the power supply device 100 can continuously determine the distance between the power receiving device 102 and the power supply device 100. When it is judged that the distance between the two is greater than the critical value, the power supply device 100 stops supplying power to the power receiving device 102. As described above, this threshold value can also be set to the chargeable range of the power supply device 100. If the power receiving device 102 continues to be within the chargeable range of the power supply device 100, the power supply device 100 can continue to charge the power receiving device 102. If the power receiving device 102 is away from the power supply device 100 and exceeds its chargeable range, the power supply device 100 stops charging and starts transmitting a broadcast signal to notify other power receiving devices to connect. In the above manner, if the power receiving device 102 is a mobile device (such as a mobile phone or a tablet computer), the user only needs to remove the mobile device to stop charging when determining that the mobile device has sufficient power. In an embodiment, the power supply device 100 may also record charging information related to the power receiving device 102 at the end of charging, and the charging information may be used for billing or as a record of consumption behavior.

It should be noted that the above charging authority may be the priority of the power receiving device 102, the authorization code obtained by the power receiving device 102, the number of points available for charging, or the stored value amount or time for charging. For example, the power receiving device 102 can transmit an authorization code to the power supply device 100 when establishing a connection with the power supply device 100. The authorization code may be in the form of a prepaid card, which is purchased and presented by the user of the power receiving device 102. Or obtained by other means. In addition, the authorization code may also record information such as the number of points that can be used for charging, the amount of stored value, or the time. The power supply device 100 can obtain the information and charge the power receiving device 102, such as a specific charging time or current amount. When the power receiving device 102 has completed the charging time or flow rate corresponding to the authorization code, the power supply device 100 can stop charging, and the authorization code is invalid, and the user needs to obtain another authorization code to continue charging. Alternatively, the power receiving device 102 may transmit an identity identification when the connection with the power supply device 100 is established, and the identity is identified as being corresponding to the specific power receiving device, which is different from the authorization code. For example, a user of the power receiving device 102 can register a user account for the power supply device 100, which includes a corresponding identity identification and password. When the power receiving device 102 wants to perform charging, the identity identification can be transmitted during the connection process. And the password to the power supply device 100, if the power supply device 100 determines that the correct identity and password are correct, the power receiving device 102 can be charged. The power supply device 100 charges the user according to the information (such as credit card information) contained in the user account, or pre-stores the value by the user.

In addition, the information transmitted by the power receiving device 102 to the power supply device 100 may include the priority of charging. For example, different user accounts may have different priorities depending on their level of payment or frequency of use, and the authorization code may also record information about priorities. In an embodiment, if the power supply device 100 is receiving a connection request from the power receiving device 104 while charging the power receiving device 102, the power supply device 100 can compare the priority between the power receiving devices 102 and 104, if the power receiving device 102 takes precedence. When the weight is higher than the power receiving device 104, the power supply device 100 does not accept the connection request from the power receiving device 104 and continues to charge the power receiving device 102. In another embodiment, if the power supply device 100 is receiving a connection request from the power receiving device 106 while charging the power receiving device 102, and the power receiving device 106 has a higher priority than the power receiving device 102, in this case, if the power supply device When the excess power output terminal is supplied to the power receiving device 106, the power supply device 100 stops charging the power receiving device 102, and accepts the connection request from the power receiving device 106 to start charging the power receiving device 106. In still another embodiment, when the power receiving devices 102 and 104 simultaneously transmit a connection request to the power supply device 100, the power supply device 100 can select a higher power receiving device to be connected and charged. It should be noted that the above priority may come from various situations, for example, when the power of a powered device is low, it may have a higher priority; or a user of a powered device may spend more money to purchase priority. The power to charge, but not limited to this. In addition to this, the owner of the power supply device 100 (for example, a store) may also specify that the power supply device 100 charges a specific power receiving device. It should be noted that the charging authority can record any information related to charging, so that the power supply device can determine whether to charge the power receiving device, and the information is not limited to the above authorization code, identity identification or priority.

It should be noted that, according to the selective charging method of the present invention, the power supply device can perform charging object selection in various manners according to the received charging authority information. Different from the prior art, as long as the power receiving device and the power supply device are close to each other and can be paired and charged, the selective charging method of the present invention needs to determine whether the power receiving device needs to determine the distance between the power receiving device and the power supply device. Have sufficient charging authority to charge the battery to meet the selective charging effect. In this way, the public place or store that provides wireless charging can combine the charging service with the charging mechanism to meet the service and demand for charging the electronic device.

In the above embodiment, the manner in which the power supply device and the power receiving device are paired is that the power supply device continuously transmits the broadcast signal, and the power receiving device detects the broadcast signal and transmits a connection request to perform pairing. In this case, the broadcast signal transmitted by the power supply device can also be combined with other uses. For example, if the power supply device is installed in a store that can provide a wireless charging service, the broadcast signal transmitted by the power supply device can be combined with the product information in the beacon. In addition, the store can also transmit other messages (such as promotions or offers) to the customer's mobile phone through broadcast signals. In another embodiment, the broadcast signal transmitted by the power supply device may also include the use state of the power supply device. For example, when the power supply device is overheated or faulty, the related information may be entrained in the broadcast signal, and the installer of the power supply device may easily Learn about its operation and deal with it immediately. In addition, since the power receiving device often starts the function of searching for the broadcast signal when the power is insufficient and needs to be charged, if the power receiving device transmits the broadcast signal, it often causes unnecessary power consumption and thus depletes the power earlier; The power supply device is physically connected to the power supply end and is powered by the power supply terminal, and the power supply device sends the broadcast signal less than the problem of depleting the power.

However, in the present invention, the operation modes of the power supply device and the power receiving device are not limited to the above descriptions regarding the processes 40 and 50. For example, please refer to FIG. 6. FIG. 6 is a schematic diagram of another wireless charging system 60 according to an embodiment of the present invention. As shown in FIG. 6, the wireless charging system 60 is composed of a power supply device 600 and power receiving devices 602, 604, and 606. The power receiving devices 602, 604, and 606 can transmit broadcast signals for the power supply device 600 to detect and search. The detailed structures of the power supply device 600 and the power receiving devices 602, 604, and 606 are the same as those of the power supply device 100 and the power receiving devices 102, 104, and 106, respectively, and the operation modes are similar, and will not be described herein.

Please refer to FIG. 7. FIG. 7 is a flowchart of a process 70 according to an embodiment of the present invention. The process 70 can be used in a power receiving device of a wireless charging system, such as the power receiving device 602, 604 or 606 shown in FIG. 6, for performing a selective wireless charging method. In an embodiment, the process 70 can be implemented in the charge controller 310 in the power receiving device 602, which includes the following steps:

Step 700: Start.

Step 702: When the power receiving device 602 wants to perform charging, continuously transmitting a broadcast signal.

Step 704: Receive a connection request from the power supply device 600 of the wireless charging system 60 to establish a connection with the power supply device 600.

Step 706: Informing the power supply device 600 that the power receiving device 602 is to be charged.

Step 708: When the power receiving device 602 is determined to have a charging authority, power is received from the power supply device 600.

Step 710: End.

According to the process 70, in the wireless charging system 60, when the power receiving device 602 is to be charged, the broadcast signal is continuously transmitted (step 702), and the power supply device continuously searches for whether there is a broadcast signal around. Similarly, the broadcast signal may include a data type, and the power supply device may determine the presence of the power receiving device according to the data type. When the power supply device 600 searches for a broadcast signal including an identifiable data type indicating that the power receiving device 602 is present nearby, the power supply device 600 can determine that the power receiving device 602 can be paired with and receive power. Next, the power supply device 600 can determine the distance between the power receiving device 602 and the power supply device 600 according to the strength of the broadcast signal, for example, by using the wireless signal strength indication included in the broadcast signal. Further, the power supply device 600 can set a threshold (for example, setting the chargeable range of the power supply device 600 to a critical value), and when determining that the distance between the power receiving device 602 and the power supply device 600 is less than a critical value, the active and power receiving devices 602 establishes a connection. For example, the power supply device 600 can issue a connection request to the power receiving device 602. After the power receiving device 602 accepts the connection request, a connection can be established and communication can be performed (step 704). During the connection process, the power receiving device 602 can inform the power supply device 600 that it wants to perform charging (step 706), or the power receiving device 602 can also carry the message to be charged in the broadcast signal. In this case, the power supply device 600 is A charging request can be received before the connection is established.

Then, through the connection and communication between the power supply device 600 and the power receiving device 602, it can be further determined whether the two are compatible. The compatible representative power supply device 600 and the power receiving device 602 conform to the same wireless charging specification, that is, the power supply device 600 can charge the power receiving device 602. Next, the power supply device 600 can determine whether the power receiving device 602 has a charging authority and determine whether to charge the power receiving device 602. The power supply device 600 can determine whether the power receiving device 602 has charging authority according to information exchanged in the communication process or information carried in the broadcast message. When the power receiving device 602 is determined to have the charging authority, the power supply device 600 can start power supply, so that the power receiving device 602 can receive power from the power supply device 600 (step 708). Conversely, when the power supply device 600 determines that the power receiving device 602 does not have the charging authority, the power receiving device 602 is not charged. In addition, the power supply device 600 can also have the circuit structure shown in FIG. 2 or other similar structures. Those skilled in the art can infer from the foregoing description of FIG. 2 how the power supply device 600 can be implemented. The selective charging mode of the power receiving device 602 will not be described here.

The operation mode and related description of the power supply device 600 in the above process 70 can be summarized as a process 80, as shown in FIG. The process 80 can be used in a power supply device of a wireless charging system, such as the power supply device 600 shown in FIG. 6, for performing a selective wireless charging method. The process 80 can be implemented in the charging controller 210 in the power supply device 600, which includes the following steps:

Step 800: Start.

Step 802: Search for a broadcast signal sent by the power receiving device 602 of the wireless charging system 60.

Step 804: When the broadcast signal is detected, the presence of the power receiving device 602 is determined according to the strength of the broadcast signal, and a distance between the power receiving device 602 and the power supply device 600 is determined.

Step 806: When the distance is less than a critical value, a connection is established with the power receiving device 602.

Step 808: Determine whether the power receiving device 602 has a charging authority according to the broadcast signal, and accordingly determine whether to charge the power receiving device 602.

Step 810: End.

Similarly, during the charging process, the power supply device 600 can continuously determine the distance between the power receiving device 602 and the power supply device 600. When it is determined that the distance between the two is greater than a threshold (such as the chargeable range of the power supply device 600), the power supply device 600 stops supplying power to the power receiving device 602. As described above, this threshold can also be set to the chargeable range of the power supply device 600. At this time, if the power receiving device 602 is still in a state of insufficient power, the broadcast signal can be resent to find out whether other power supply devices can provide power. If the power of the power receiving device 602 is sufficient, the broadcast signal is no longer transmitted. In the above manner, if the power receiving device 602 is a mobile device (such as a mobile phone or a tablet computer), the user only needs to remove the mobile device to stop charging when determining that the mobile device has sufficient power.

In addition, in the wireless charging system 60 and the processes 70, 80, the charging authority may be the priority of the power receiving device 102, the authorization code obtained by the power receiving device 102, the number of points available for charging, or the storage available for charging. Value amount or time, etc. For detailed implementation of the charging authority, refer to the foregoing description, and details are not described herein. It should be noted that the power receiving device 602 can not only inform the power supply device 600 of the charging authority after establishing the connection, but also entrain the charging authority in the broadcast message before establishing the connection, so that the power supply device 600 can transmit the message through the broadcast message. It is determined whether or not the power receiving device 602 has sufficient authority to determine whether to charge the power receiving device 602 or whether to establish a connection with the power receiving device 602. Similarly, the connection between the power supply device 600 and the power receiving device 602 can be connected through any wireless communication technology, and the connection method can be any standard communication protocol, such as Bluetooth, Bluetooth Low Energy (Bluetooth Low Energy) , BLE), Wireless Fidelity (Wi-Fi) or Radio Frequency (RF) signals, etc., but are not limited thereto.

In detail, the difference between the wireless charging systems 10 and 60 is only that the objects that transmit the broadcast and the initial connection are different. In the wireless charging system 10, the broadcast signal is transmitted by the power supply device 100, and the power receiving device 102 searches for the broadcast signal and actively connects with the power supply device 100 when the broadcast signal is detected. In the wireless charging system 60, the power receiving device 602 searches for the broadcast signal and actively connects to the power receiving device 602 when the broadcast signal is detected. Generally speaking, the power receiving device often sends a broadcast signal when the power is insufficient, which is more suitable for the user. For example, the powered device can generate a warning message and display a button when the battery is low. After receiving the warning message, the user can trigger a button to initiate the operation of transmitting the broadcast signal. The powered device then receives the message sent back by the power supply device to inform its location, or obtains the location of the nearby power supply device by other means, such as a Global Positioning System (GPS).

In addition, when the broadcast signal is transmitted by the power receiving device, the power receiving device can directly carry any information required for the wireless charging operation in the broadcast signal. For example, the broadcast signal can carry the detailed content of the charging authority, such as the foregoing authorization code or identity identification. Wait. In addition, the broadcast signal may also include a wireless signal strength indication for the power supply device to determine the distance or contain compatibility information of the charging specification. More specifically, the broadcast signal transmitted by the power receiving device may include any content to be provided to the power supply device, so that the power supply device can determine whether to establish a connection with it and transmit power. Those skilled in the art can implement the selective charging method of the present invention by using the wireless charging system 10 in conjunction with the processes 40, 50 or the wireless charging system 60 in conjunction with the processes 70, 80, depending on the characteristics of the various wireless communications or according to actual needs.

It is worth noting that embodiments of the present invention achieve good control of wireless charging. For example, whether the broadcast signal is sent by the power supply device or the power receiving device, the corresponding receiving end can determine the distance between the broadcast signal transmitting end and the receiving end itself according to the received broadcast signal strength, and the power receiving device can use the distance information. To choose the most suitable power supply object. In an embodiment, when a powered device (such as a mobile phone) wants to charge and turn on the search function of the broadcast signal, the mobile phone may simultaneously receive broadcast signals from multiple power supply devices (such as multiple wireless power sources). The mobile phone can determine the distance between each wireless power source and the mobile phone according to the strength of each broadcast signal. In this case, the mobile phone can select to send a connection request to the nearest wireless power source (ie, corresponding to the highest broadcast signal strength), and then connect and charge the wireless power source. In this way, the mobile phone can select the most suitable power supply object by itself, and does not need to additionally display the nearby wireless power supply for the user to select, which can prevent the user from making an error if he is not familiar with the wireless power source name. In addition, the user of the mobile phone does not need to select a wireless power source to be used through a list displayed on the mobile phone or by scanning a bar code or a Quick Response Code (QR Code), thereby achieving good charging. Control and convenience.

In summary, in the selective charging method of the present invention, the power supply device can determine the charging authority of the power receiving device to implement applications and services related to wireless charging. In an embodiment, the broadcast signal can be sent by the power supply device. When the power receiving device detects the broadcast signal, it actively connects with the power supply device, and the power supply device determines whether the power receiving device has the charging authority, and determines whether to perform the charging device. Charging. In another embodiment, the broadcast signal can be sent by the power receiving device. When the power supply device detects the broadcast signal, the power supply device actively connects with the power receiving device, and the power supply device determines whether the power receiving device has charging authority, and determines whether to Charge it. The above selective charging method can be implemented by a charging controller. In the power receiving device, the charging controller can be realized by a communication unit having a wireless communication function and an application in the processor; in the power supply device, the charging controller can be built in Or an external connection, and the transmission of power can be controlled by any type of interface to implement a selective charging method. The above are only the preferred embodiments of the present invention, and all changes and modifications made to the scope of the present invention should be within the scope of the present invention.

<TABLE border="1" borderColor="#000000" width="85%"><TBODY><tr><td> 10 </td><td> Wireless Charging System</td></tr><tr ><td> 100 </td><td> Power Supply Device</td></tr><tr><td> 102, 104, 106 </td><td> Powered Device</td></tr> <tr><td> 200 </td><td> Wireless Charging Module</td></tr><tr><td> 202 </td><td> Power Supply </td></tr ><tr><td> 210 </td><td> Charge Controller</td></tr><tr><td> 212 </td><td> Communication Unit</td></tr> <tr><td> 214 </td><td> Processing Device</td></tr><tr><td> 216 </td><td> Storage Unit</td></tr><tr ><td> 218 </td><td> Switch</td></tr><tr><td> 300 </td><td> Wireless Receiver Module</td></tr><tr> <td> 310 </td><td> Charge Controller</td></tr><tr><td> 312 </td><td> Communication Unit</td></tr><tr>< Td> 314 </td><td> Processing Device</td></tr><tr><td> 316 </td><td> Storage Unit</td></tr><tr><td> 40 </td><td> Process</td></tr><tr><td> 400~410 </td><td> Step </td></tr><tr><td> 50 < /td><td> Process</td></tr><tr><td> 500~508 </td><td> Steps</td></tr><tr><td> 60 </td ><td> Wireless Charging System</td></t r><tr><td> 600 </td><td> Power Supply Device</td></tr><tr><td> 602, 604, 606 </td><td> Power Receiving Device</td> </tr><tr><td> 70 </td><td> Process</td></tr><tr><td> 700~710 </td><td> Step </td></ Tr><tr><td> 80 </td><td> Process</td></tr><tr><td> 800~810 </td><td> Step </td></tr> </TBODY></TABLE>

FIG. 1 is a schematic diagram of a wireless charging system according to an embodiment of the present invention. Figure 2 is a schematic illustration of one embodiment of a power supply unit. Fig. 3 is a schematic view showing an embodiment of a power receiving device. 4 is a flow chart of a process of an embodiment of the present invention. FIG. 5 is a flow chart of a process of an embodiment of the present invention. FIG. 6 is a schematic diagram of another wireless charging system according to an embodiment of the present invention. Figure 7 is a flow chart of a process of the embodiment of the present invention. FIG. 8 is a flow chart of a process of an embodiment of the present invention.

<TABLE border="1" borderColor="#000000" width="85%"><TBODY><tr><td> 40 </td><td> Process</td></tr><tr>< Td> 400～410 </td><td> Steps</td></tr></TBODY></TABLE>

Claims (22)

A selective wireless charging method for a power receiving device of a wireless charging system, the wireless charging method comprising the steps of: searching for a broadcast signal sent by a power supply device of the wireless charging system; when detecting the broadcast signal Determining a distance between the power supply device and the power receiving device according to the strength of the broadcast signal; when the distance is less than a threshold value, establishing a connection with the power supply device, and informing the power supply device that the power receiving device is to perform Charging; and when the power receiving device is determined by the power supply device to have a charging authority, starting to receive power from the power supply device. The wireless charging method of claim 1, wherein the broadcast signal includes a data type, and the power receiving device determines the presence of the power supply device according to the data type and identifies the power supply device. The wireless charging method according to claim 1, wherein the charging authority includes a priority of the power receiving device, an authorization code obtained by the power receiving device, a point for charging, or a stored value for charging or time. The wireless charging method according to claim 1, wherein the connection method for establishing a connection with the power supply device comprises Bluetooth, Bluetooth Low Energy (BLE), and wireless compatibility authentication (Wireless). Fidelity, Wi-Fi or Radio Frequency (RF) signals. A selective wireless charging method for a power supply device of a wireless charging system, the wireless charging method comprising the steps of: continuously transmitting a broadcast signal; receiving a connection request from one of the power receiving devices of the wireless charging system, Establishing a connection with the power receiving device; and determining whether the power receiving device has a charging authority, and determining whether to charge the power receiving device. The wireless charging method of claim 5, further comprising the steps of: continuously determining a distance between the power receiving device and the power supply device during the charging process, and stopping the supply of power when determining that the distance is greater than a threshold value To the power receiving device. The wireless charging method of claim 5, wherein determining whether the power receiving device has the charging authority, and determining whether to charge the power receiving device according to the method includes: when determining that the power receiving device has the charging authority, The power receiving device performs charging; or when it is determined that the power receiving device does not have the charging authority, the power receiving device is not charged. The wireless charging method according to claim 5, wherein the charging authority includes a priority of the power receiving device, an authorization code obtained by the power receiving device, a point for charging, or a stored value for charging or time. The wireless charging method of claim 5, wherein the connection request from the power receiving device of the wireless charging system is received to establish a connection with the power receiving device, and the connection method includes Bluetooth, Bluetooth. Bluetooth Low Energy (BLE), wireless compatibility Wireless Fidelity (Wi-Fi) and Radio Frequency (RF) signals. A selective wireless charging method for a power receiving device of a wireless charging system, the wireless charging method comprising the steps of: continuously transmitting a broadcast signal when the power receiving device is to be charged; receiving the wireless charging system from the wireless charging system a power supply device is configured to connect with the power supply device to notify the power supply device that the power receiving device is to be charged; and when the power receiving device is determined by the power supply device to have a charging authority, start to supply power from the power supply device The device receives power. The wireless charging method of claim 10, wherein the broadcast signal includes a data type, the data type being provided to the power supply device to determine the presence of the power receiving device. The wireless charging method of claim 10, wherein the charging authority includes a priority of the power receiving device, an authorization code obtained by the power receiving device, a point for charging, or a stored value for charging or time. The wireless charging method of claim 10, wherein the connection request from the power supply device of the wireless charging system is received to establish a connection with the power supply device, and the connection method includes Bluetooth, Bluetooth. Low-power (Bluetooth Low Energy, BLE), Wireless Fidelity (Wi-Fi), Radio Frequency (RF) signals. A selective wireless charging method for a power supply device of a wireless charging system, The wireless charging method includes the following steps: searching for a broadcast signal sent by a power receiving device of the wireless charging system; when detecting the broadcast signal, determining the presence of the power receiving device according to the strength of the broadcast signal, and determining the a distance between the power receiving device and the power supply device; when the distance is less than a threshold value, establishing a connection with the power receiving device; and determining, according to the broadcast signal, whether the power receiving device has a charging authority, and determining whether The power receiving device is charged. The wireless charging method of claim 14, wherein the broadcast signal includes a data type, the power supply device determines the presence of the power receiving device according to the data type and determines whether the power receiving device has the charging authority. The wireless charging method of claim 14, further comprising the steps of: continuously determining the distance between the power receiving device and the power supply device during the charging process, and stopping the supply when determining that the distance is greater than the threshold value Power is supplied to the power receiving device. The wireless charging method of claim 14, wherein determining whether the power receiving device has the charging authority based on the broadcast signal, and determining whether to charge the power receiving device according to the method includes: when determining that the power receiving device has the When the charging authority is performed, the power receiving device is charged; or when it is determined that the power receiving device does not have the charging authority, the power receiving device is not charged. The wireless charging method of claim 14, wherein the charging authority includes one of the power receiving devices, the power receiving device obtains one of the authorization codes, the number of points for charging, or is used for charging The amount or time of the stored value. The wireless charging method of claim 14, wherein the connection method for establishing a connection with the power receiving device comprises Bluetooth, Bluetooth Low Energy (BLE), and wireless compatibility authentication (Wireless). Fidelity, Wi-Fi, Radio Frequency (RF) signals. A charging controller for a wireless charging system for performing a selective wireless charging method, the charging controller comprising: a communication unit for transmitting a broadcast signal or detecting the wireless charging One of the receiving devices of the system broadcasts a signal and establishes a connection with the powered device for communication; a processing device is coupled to the communication unit for determining a distance between the power supply device and the power receiving device, and Determining whether to charge the power receiving device according to whether the power receiving device has a charging authority, and the processing device controls the operation of the communication unit; and a switch coupled to the processing device, the switch determining the power receiving at the processing device When the device has the charging authority, it is turned on to charge the power receiving device. The charging controller of claim 20, wherein the charging controller is built in the power supply device or externally connected to the power supply device through a connector. The charging controller of claim 21, wherein the connector is a replaceable connector.