TWO-WAY COMMUNICATION USING WIRELESS POWER SIGNAL

• US 20140153491A1
• Filed: 07/20/2011
• Published: 06/05/2014
• Est. Priority Date: 07/20/2011
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Chu, Inchang, Seo, Jeongkyo, Lee, Jaesung
• Granted Patent: US 9,503,178 B2
• Time in Patent Office: Days
• US Class Current: 370/328
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/20 using microwaves or radio frequency waves
• CPC Class Codes: H02J 50/402 the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas
• CPC Class Codes: H02J 50/60 responsive to the presence of foreign objects, e.g. detection of living beings
• 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 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: H04B 5/26 using coils
• CPC Class Codes: H04B 5/72 for local intradevice communication
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer
• CPC Class Codes: H04B 7/26 at least one of which is mobile
• CPC Class Codes: H04L 27/00 Modulated-carrier systems

Abstract

The present description relates to an apparatus for transmitting wireless power and a method for same, comprising: a power transmission control portion for generating a packet comprising data for at least one electronic device; a modulation/demodulation portion for modulating a carrier signal so as to comprise the packet that is generated; and a power conversion portion for forming the wireless power signal for transmitting power, based on the carrier signal that is modulated, wherein the power transmission control portion transmits the packet to the at least one electronic device through the wireless power signal. Also, the present description relates to the electronic device and a method for receiving power by same, comprising: a power reception portion for receiving the wireless power signal from the apparatus for transmitting wireless power; a modulation/demodulation portion for demodulating the packet which is comprised in the wireless power signal; and a power reception control portion for obtaining data based on the packet that is demodulated.

Claims

1. A wireless power transmitter, comprising

a power transmission controller configured to generate a packet containing data for one or more electronic devices;

a modulation/demodulation unit configured to modulate a carrier signal to contain the generated packet;

a power conversion unit configured to form a wireless power signal for power transmission based on the modulated carrier signal,

wherein the power transmission controller transmits the packet to the one or more electronic devices through the wireless power signal.

2. The wireless power transmitter of claim 1, wherein the power conversion unit receives a wireless power signal modulated by the one or more electronic devices, and

the modulation/demodulation unit demodulates the received wireless power signal.

3. The wireless power transmitter of claim 1, wherein the generated packet comprises a destination address, and the destination address indicates an electronic device for transmitting the data among the one or more electronic devices.

4. The wireless power transmitter of claim 3, wherein the destination address is an identifier of an electronic device for receiving the data or an identifier of a group to which one or more electronic devices for receiving the data belong.

5. The wireless power transmitter of claim 3, wherein the power transmission controller determines status information on the electronic device according to whether or not a response packet for the data is received within an expiration period of time from the electronic device corresponding to the destination address.

6. The wireless power transmitter of claim 5, wherein the power transmission controller determines the status information on the electronic device as a removed state when the response packet is not received from the electronic device corresponding to the destination address within the expiration period of time.

7. The wireless power transmitter of claim 5, wherein the power transmission controller determines the status information on the electronic device as a normal state when the response packet is received from the electronic device corresponding to the destination address within the expiration period of time.

8. The wireless power transmitter of claim 7, wherein the power transmission controller generates packets containing the destination addresses of electronic devices, respectively, having the status information of a normal state, and sequentially transmits the generated packets to electronic devices corresponding to the packets, respectively.

9. An electronic device, comprising:

a power receiver configured to receive a wireless power signal from a wireless power transmitter;

a modulation/demodulation unit configured to demodulate a packet contained in the wireless power signal; and

a power receiving controller configured to acquire data based on the demodulated packet.

10. The electronic device of claim 9, wherein the power receiving controller transmits a response packet corresponding to the acquired data to the wireless power transmitter.

11. The electronic device of claim 10, wherein the packet comprises a destination address.

12. The electronic device of claim 11, wherein the power receiving controller determines whether or not to respond based on the destination address, and the determination of whether or not to respond determines whether the destination address indicates an identifier of the electronic device or an identifier of a group to which the electronic device belongs.

13. The electronic device of claim 12, wherein the power receiving controller transmits the response packet to the wireless power transmitter when a response is required as a result of the determination of whether or not to respond.

14. The electronic device of claim 10, wherein the modulation/demodulation unit modulates the received wireless power signal, and

the response packet is modulated by the modulation/demodulation unit to be contained in the received wireless power signal for transmission.

15. The electronic device of claim 10, wherein the response packet is transmitted to the wireless power transmitter within an expiration period of time.

16. A wireless power transmission method, comprising:

forming a first wireless power signal for power transmission; and

transmitting the first wireless power signal to a first electronic device,

wherein the first wireless power signal is formed based on a carrier signal modulated to contain a data packet generated for the first electronic device, and the packet is transmitted to the first electronic device through the first wireless power signal.

17. The wireless power transmission method of claim 16, wherein the packet comprises a destination address, wherein destination address is information indicating the first electronic device.

18. The wireless power transmission method of claim 17, wherein the destination address is an identifier of the first electronic device or an identifier of a group to which the first electronic device belongs.

19. The wireless power transmission method of claim 17, further comprising:

determining whether or not a response packet for the data has been received within an expiration period of time from the first electronic device.

20. The wireless power transmission method of claim 19, further comprising:

determining status information on the first electronic device as a removed state when the response packet is not received within the expiration period of time from the first electronic device.

21. The wireless power transmission method of claim 19, further comprising:

determining status information on the first electronic device as a normal state when the response packet is received within the expiration period of time from the first electronic device.

22. The wireless power transmission method of claim 21, further comprising:

modulating the response packet received from the first electronic device.

23. The wireless power transmission method of claim 16, further comprising:

forming a second wireless power signal for power transmission; and

transmitting the second wireless power signal to a second electronic device,

wherein the second wireless power signal is formed based on a carrier signal modulated to contain a data packet generated for the second electronic device, and the packet is transmitted to the second electronic device through the second wireless power signal.

24. A wireless power receiving method, comprising:

receiving a wireless power signal from a wireless power transmitter;

demodulating a packet contained in the wireless power signal; and

acquiring data based on the demodulated packet.

25. The wireless power receiving method of claim 24, further comprising:

transmitting a response packet corresponding to the acquired data to the wireless power transmitter.

26. The wireless power receiving method of claim 25, wherein the packet comprises a destination address.

27. The wireless power receiving method of claim 26, further comprising:

determining whether or not to respond based on the destination address,

wherein the determination of whether or not to respond determines whether the destination address indicates an identifier of the electronic device or an identifier of a group to which the electronic device belongs.

28. The wireless power receiving method of claim 27, wherein said transmitting a response packet transmits the response packet to the wireless power transmitter when a response is required as a result of the determination of whether or not to respond.

29. The wireless power receiving method of claim 25, wherein said transmitting a response packet modulates the received wireless power signal, and the response packet is modulated to be contained in the received wireless power signal for transmission.

30. The wireless power receiving method of claim 25, wherein the response packet is transmitted to the wireless power transmitter within an expiration period of time.