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

• US 20140319925A1
• 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 9,124,309 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 transmission method of a wireless power transmitter for transmitting power to a wireless power receiver, according to the embodiment includes transmitting a connection signal for identifying the wireless power receiver; identifying the wireless power receiver by receiving a response signal to the connection signal from the wireless power receiver; negotiating a power transmission condition with the identified wireless power receiver; and transmitting the power to the identified wireless power receiver according to the negotiated power transmission condition.

Claims

1. A wireless power transmission method of a wireless power transmitter for transmitting power to a wireless power receiver, the wireless power transmission method comprising:

transmitting a connection signal for identifying the wireless power receiver,

identifying the wireless power receiver by receiving a response signal to the connection signal from the wireless power receiver;

negotiating a power transmission condition with the identified wireless power receiver; and

transmitting the power to the identified wireless power receiver according to the negotiated power transmission condition.

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

transmitting state information of the wireless power transmitter to the identified wireless power receiver; and

receiving state information of the identified wireless power receiver, and

wherein the state information of the identified wireless power receiver is determined based on the state information of the wireless power transmitter.

3. The wireless power transmission method of claim 2, wherein the state information of the wireless power transmitter includes at least one of information related to 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.

4. The wireless power transmission method of claim 2, wherein the state information of the identified wireless power receiver includes at least one of demanded power information and present charging information on the identified wireless power receiver.

5. The wireless power transmission method of claim 1, wherein the wireless power transmitter adjusts the power based on priority of the identified wireless power receiver.

6. The wireless power transmission method of claim 2, wherein the state information of the identified wireless power receiver includes information for representing that a battery is charged sufficiently.

7. The wireless power transmission method of claim 1, wherein the wireless power transmitter negotiates the power transmission condition with the identified wireless power receiver through out-of-band bidirectional communication.

8. The wireless power transmission method of claim 1, further comprising transmitting the connection signal to another wireless power receiver when the response signal is not received in the wireless power transmitter.

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

transmitting a state list of a plurality of wireless power transmitters to the identified wireless power receiver to select at least one of the wireless power transmitters; and

receiving selection information corresponding to the selection of the wireless power transmitters from the identified wireless power receiver, and

wherein the transmission of the power to the identified wireless power receiver comprises;

transmitting the power from the selected at least one wireless power transmitter to the identified wireless power receiver.

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

receiving information about a demanded amount of power from the identified wireless power receiver; and

checking whether the demanded amount of power is within a range of an available amount of power of the wireless power transmitter, and

wherein the transmission of the power to the identified wireless transmitter comprises;

transmitting the power corresponding to the demanded amount of power to the identified wireless power receiver if the demanded amount of power is within a range of an available amount of power of the wireless power transmitter.

11. A wireless power transmitter for transmitting power to a wireless power receiver, the wireless power transmitter comprising:

a transmitting unit to transmit a connection signal for identifying the wireless power receiver;

an identifying unit to identify the wireless power receiver by receiving a response signal including an identification information from the wireless power receiver; and

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

wherein the transmitting unit transmits the power to the identified wireless power receiver according to the negotiated power transmission condition.

12. The wireless power transmitter of claim 11, wherein the negotiation unit transmits state information of the wireless power transmitter to the identified wireless power receiver and receives specific state information of the identified power receiver, and

wherein the specific state information of the identified wireless power receiver is determined based on the state information of the wireless power transmitter.

13. The wireless power transmitter of claim 12, 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 transmitter of claim 12, wherein the specific state information of the identified wireless power receiver includes at least one of demanded power information and present charging information in the identified wireless power receiver.

15. The wireless power transmitter of claim 11, wherein the wireless power transmitter adjusts the power based on priority of the identified wireless power receiver.

16. The wireless power transmitter of claim 11, wherein the negotiating unit negotiates the power transmission condition with the identified wireless power receiver through out-of-band bidirectional communication.

17. The wireless power transmitter of claim 16, wherein the out-of-band bidirectional communication includes at least one of Bluetooth, Zig-bee, WLAN, and NFC.

18. The wireless power transmitter of claim 11, the wireless power transmitter transmits the power to the identified wireless power receiver using a transmission resonant coil.