WIRELESS POWER TRANSMITTER, WIRELESS POWER RECEIVER, WIRELESS POWER TRANSMISSION METHOD AND WIRELESS POWER RECEPTION METHOD

• US 20140319926A1
• Filed: 07/07/2014
• Published: 10/30/2014
• Est. Priority Date: 11/10/2011
• Status: Active Grant

• Current Assignee: LG Innotek Company Limited (LG Corporation)
• Original Assignee: LG Innotek Company Limited (LG Corporation)
• Inventors: JUNG, Woo Kil
• Granted Patent: US 9,225,177 B2
• Time in Patent Office: Days
• US Class Current: 307/104
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/40 using two or more transmitting or receiving devices H02J50/50 takes precedence
• 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 7/00 Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• CPC Class Codes: H02J 7/00034 Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge
• CPC Class Codes: H04B 5/263 Multiple coils at either side
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer

Abstract

A wireless power reception method of a wireless power receiver for receiving power from a wireless power transmitter, according to the embodiment includes receiving a connection signal for identifying the wireless power receiver from the wireless power transmitter; transmitting a response signal in response to the connection signal to the wireless power transmitter; negotiating a power transmission condition with the wireless power transmitter; and receiving the power according to the negotiated power transmission condition.

Claims

1. A wireless power reception method of a wireless power receiver for receiving power from a wireless power transmitter, the wireless power receiving method comprising:

receiving a connection signal for identifying the wireless power receiver from the wireless power transmitter;

transmitting a response signal in response to the connection signal to the wireless power transmitter;

negotiating a power transmission condition with the wireless power transmitter; and

receiving the power according to the negotiated power transmission condition.

2. The wireless power reception method of claim 1, wherein the negotiating of the power transmission condition comprises:

receiving state information of the wireless power transmitter from the wireless power transmitter;

determining specific state information based on the state information of the wireless power transmitter; and

transmitting the determined specific state information to the wireless power transmitter.

3. The wireless power reception method of claim 2, wherein the wireless power receiver determines the specific state information further using present charging information on the wireless power receiver, and

wherein the present charging information includes information corresponding to a change of charge amount being supplied to battery of the wireless power receiver.

4. The wireless power reception method of claim 2, wherein the specific state information includes information corresponding to an amount of power demanded by the wireless power receiver.

5. The wireless power reception method of claim 2, wherein the state information of the wireless power transmitter includes at least one of information related to a maximum amount of power to be supplied by the wireless power transmitter, identification information corresponding to the wireless power transmitter and information for the number of the wireless power receiver that can be supported by the wireless power transmitter.

6. The wireless power reception method of claim 2, wherein the wireless power receiver negotiates the power transmission condition with the wireless power transmitter through out-of-band bidirectional communication.

7. The wireless power reception method of claim 6, wherein the out-of-band bidirectional communication includes at least one of Bluetooth, Zig-bee, WLAN, and NFC.

8. The wireless power reception method of claim 1, wherein the negotiating of the power transmission condition comprises:

receiving a state list of a plurality of wireless power transmitters including the wireless power transmitter;

selecting at least one of the plurality of wireless power transmitters to receive the power; and

transmitting selection information corresponding to the selected at least one wireless power transmitter.

9. A wireless power receiver for receiving power from a wireless power transmitter, the wireless power receiver comprising:

a receiving unit to receive a connection signal for identifying the wireless power receiver from the wireless power transmitter;

a transmitting unit to transmit a response signal including an identification information in response to the connection signal; and

a negotiating unit to negotiate a power transmission condition with the wireless power transmitter,

wherein the wireless power receiver receives the power from the wireless power transmitter according to the negotiated power transmission condition.

10. The wireless power receiver of claim 9, wherein the negotiating unit receives state information of the wireless power transmitter from the wireless power transmitter, determines specific state information based on the state information of the wireless power transmitter, and transmits the determined specific state information to the wireless power transmitter.

11. The wireless power receiver of claim 10, wherein the negotiating unit determines the specific state information further using present charging information on the wireless power receiver, and

wherein the present charging information includes information corresponding to a change of charge amount being supplied to battery of the wireless power receiver.

12. The wireless power receiver of claim 10, wherein the specific state information includes information corresponding to an amount of power demanded by the wireless power receiver.

13. The wireless power receiver of claim 10, wherein the state information of the wireless power transmitter includes at least one of information related to a maximum amount of power to be supplied by the wireless power transmitter, identification information corresponding to the wireless power transmitter and information for the number of the wireless power receiver that can be supported by the wireless power transmitter.

14. The wireless power receiver of claim 9, wherein the negotiating unit negotiates the power transmission condition with the wireless power transmitter through out-of-band bidirectional communication.

15. The wireless power receiver of claim 14, wherein the out-of-band bidirectional communication includes at least one of Bluetooth, Zig-bee, WLAN, and NFC.

16. The wireless power receiver of claim 9, wherein the negotiating unit receives a state list of a plurality of wireless power transmitters including the wireless power transmitter, selects at least one of the plurality of wireless power transmitters to receive the power and transmits selection information corresponding to the selected at least one wireless power transmitter.

17. The wireless power receiver of claim 9, the wireless power receiver receives the power from the wireless power transmitter by using a reception resonant coil.