Wireless power receiver for receiving power from a wireless power transmitter using a power signal through a resonance frequency band

• US 9,225,177 B2
• Filed: 07/07/2014
• Issued: 12/29/2015
• 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
• Primary Examiner(s): Amrany, Adi
• Application Number:
  US14/325,217
• Publication Number:
  US 20140319926A1
• Time in Patent Office: 540 Days
• Field of Search: 307/104
• US Class Current: 1/1
• 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 using a power signal through a resonance frequency band, the wireless power reception method comprising:

receiving a connection signal for detecting and 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 through a specific frequency band;

receiving state information of the wireless power transmitter from the wireless power transmitter through the specific frequency band, wherein the state information comprises an available amount of power of the wireless power transmitter;

transmitting specific state information to the wireless power transmitter through the specific frequency band, wherein the specific state information comprises a demanded amount of power of the wireless power receiver, and wherein the demanded amount of power is adjusted by the wireless power receiver within the available amount of power of the wireless power transmitter; and

receiving the power from the wireless power transmitter according to the specific state information through the resonance frequency band being a resonance-coupled frequency between the wireless power transmitter and the wireless power receiver and being different than the specific frequency band.

2. The wireless power reception method of claim 1, wherein the wireless power receiver determines the specific state information 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 a battery of the wireless power receiver.

3. The wireless power reception method of claim 1, further comprising:

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.

4. The wireless power reception method of claim 1, wherein the state information of the wireless power transmitter includes a maximum amount of power of the wireless power transmitter or a number of wireless power receivers that can be supported by the wireless power transmitter.

5. A wireless power receiver for receiving power from a wireless power transmitter using a power signal through a resonance frequency band, the wireless power receiver comprising:

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

a transmitting unit configured to transmit a response signal in response to the connection signal through a specific frequency band; and

a control unit configured to;

receive state information of the wireless power transmitter including an available amount of power of the wireless power transmitter from the wireless power transmitter through the specific frequency band,

adjust a demanded amount of power within the available amount of power of the wireless power transmitter, and

transmit specific state information including the demanded amount of power of the wireless power receiver to the wireless power transmitter through the specific frequency band,

wherein the wireless power receiver receives the power from the wireless power transmitter according to the specific state information through the resonance frequency band being a resonance-coupled frequency between the wireless power transmitter and the wireless power receiver and being different than the specific frequency band.

6. The wireless power receiver of claim 5, wherein the control unit determines the specific state information 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 a battery of the wireless power receiver.

7. The wireless power receiver of claim 5, wherein the control 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.

8. The wireless power receiver of claim 5, the wireless power receiver receives the power from the wireless power transmitter by using a reception resonant coil.

9. The wireless power receiver of claim 5, wherein the amount of state information of the wireless power transmitter includes a maximum amount of power of the wireless power transmitter or a number of wireless power receivers that can be supported by the wireless power transmitter.