WIRELESS CHARGING SYSTEM AND METHOD

• US 20170155271A1
• Filed: 10/23/2015
• Published: 06/01/2017
• Est. Priority Date: 06/08/2015
• Status: Abandoned Application

• Current Assignee: BOE Technology Group Co., Ltd.
• Original Assignee: BOE Technology Group Co., Ltd.
• Inventors: GUO, Weiqing
• Application Number:
  US15/122,586
• Publication Number:
  US 20170155271A1
• Time in Patent Office: Days
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• CPC Class Codes: H02J 7/00034 Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge

Abstract

A wireless charging system is disclosed, comprising a receiver circuit and a transmitter circuit, wherein the wireless charging system further comprises: a voltage detector connected to a load located at a side of the receiver circuit, for detecting a voltage change on the load; a transmitter connected to the voltage detector, for receiving a signal representing the voltage change on the load from the voltage detector and transmitting the signal; a receiver for receiving the signal from the transmitter and providing the signal to the transmitter circuit; wherein the transmitter circuit comprises a variable voltage source for providing different output voltages to the receiver circuit based on the signal received from the receiver. A method for use in the wireless charging system is also disclosed.

Claims

1. A wireless charging system, comprising:

a receiver circuit;

a transmitter circuit;

a voltage detector, connected to a load located at a side of the receiver circuit, for detecting a voltage change on the load;

a transmitter, connected to the voltage detector, for receiving a signal representing the voltage change on the load from the voltage detector and transmitting the signal;

a receiver for receiving the signal from the transmitter and providing the signal to the transmitter circuit;

wherein the transmitter circuit comprises a variable voltage source for providing different output voltages to the receiver circuit based on the signal received from the receiver.

2. The wireless charging system according to claim 1, wherein the variable voltage source comprises a controller and a variable resistor, the controller controls a resistance value of the variable resistor based on the signal received from the receiver.

3. The wireless charging system according to claim 2, wherein the variable resistor is a slide resistor.

4. The wireless charging system according to claim 1, wherein the transmitter circuit further comprises:

a driver for converting a voltage from the variable voltage source into a power signal for wireless transmission.

5. The wireless charging system according to claim 1, wherein the receiver circuit comprises:

a rectifier for converting the wirelessly received power signal into a voltage signal; and

a voltage regulator for regulating the voltage signal and providing the voltage signal to the load.

6. The wireless charging system according to claim 1, wherein the transmitter transmits the signal representing the voltage change on the load to the receiver by wireless communication.

7. The wireless charging system according to claim 1, wherein the transmitter performs binary coding on the voltage change on the load, and the receiver decodes the binary coded voltage change on the load.

8. The wireless charging system according to claim 1, wherein the voltage detector integrates the signal representing the voltage change on the load before providing the signal to the transmitter.

9. A device, comprising:

a voltage detector for detecting a voltage change on a load located in the device; and

a transmitter, connected to the voltage detector, for receiving a signal representing the voltage change on the load from the voltage detector and transmitting the signal wirelessly.

10. The device according to claim 9, further comprising:

a receiving coil for receiving a power signal wirelessly;

a rectifier for converting the wirelessly received power signal into a voltage signal; and

a voltage regulator for regulating the voltage signal and providing the voltage signal to the load.

11. A power supply device, comprising:

a receiver for receiving signals wirelessly; and

a variable voltage source for outputting different output voltages based on the signals received from the receiver.

12. The power supply device according to claim 11, wherein the variable voltage source comprises a controller and a variable resistor, the controller controls a resistance value of the variable resistor based on the signals received from the receiver.

13. The power supply device according to claim 11, further comprising:

a driver for converting a voltage from the variable voltage source into a power signal for wireless transmission; and

a transmitting coil for transmitting the power signal wirelessly.

14. A method for use in a wireless charging system, comprising:

detecting a voltage change on a load by a voltage detector located at a side of a receiver circuit, and providing a signal representing the voltage change on the load to a transmitter;

transmitting the signal representing the voltage change on the load by the transmitter;

receiving the signal from the transmitter by a receiver, and providing the signal to a transmitter circuit; and

providing different output voltages to the receiver circuit based on the signal received from the receiver by a variable voltage source in the transmitter circuit.