Method and apparatus for controlling wireless power of a receiver in a wireless power transmission/reception system

• US 9,024,484 B2
• Filed: 06/07/2012
• Issued: 05/05/2015
• Est. Priority Date: 06/07/2011
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Park, Se-Ho, Lee, Young-Min, Lee, Kyung-Woo, Byun, Kang-Ho
• Primary Examiner(s): Deberadinis, Robert L.
• Application Number:
  US13/490,963
• Publication Number:
  US 20120313446A1
• Time in Patent Office: 1,062 Days
• Field of Search: 307/104
• US Class Current: 307/104
• 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 50/80 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: H02J 7/00045 Authentication, i.e. circuits for checking compatibility between one component, e.g. a battery or a battery charger, and another component, e.g. a power source
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer

Abstract

A method and apparatus are provided for controlling power of a receiver in a wireless power transmission/reception system, wherein a wireless power quantity supplied to receivers from a transmitter is controlled through communication between the receivers. The method includes receiving required power information transmitted from a joining receiver in a charging area of a transmitter; determining whether the transmitter is capable of supplying required power to the joining receiver based on the required power information; and requesting the joining receiver to maintain a standby state, when the transmitter is not capable of supplying the required power to the joining receiver.

Claims

1. A method for controlling wireless power of a receiver in a wireless power transmission and reception system, the method comprising:

receiving required power information transmitted from a joining receiver in a charging area of a transmitter;

determining whether the transmitter is capable of supplying required power to the joining receiver based on the required power information; and

requesting the joining receiver to maintain a standby state, when the transmitter is not capable of supplying the required power to the joining receiver.

2. The method of claim 1, further comprising receiving charging power information from a registered receiver included in the charging area.

3. The method of claim 2, wherein determining whether the transmitter is capable of supplying the required power to the joining receiver comprises:

calculating remaining power of the transmitter based on the charging power information; and

determining whether the remaining power is larger than the required power.

4. The method of claim 3, further comprising determining that the transmitter is capable of supplying the required power to the joining receiver, when the remaining power is larger than the required power.

5. The method of claim 3, further comprising determining that the transmitter is not capable of supplying the required power to the joining receiver, when the remaining power is not larger than the required power.

6. A method of controlling wireless power of a receiver in a wireless power transmission and reception system, the method comprising:

transmitting, by the receiver, required power information to a transmitter;

receiving charging power information from a registered receiver included in the charging area;

determining whether the transmitter is capable of supplying required power based on the charging power information; and

maintaining a standby state, when the transmitter is not capable of supplying the required power.

7. The method of claim 6, wherein the charging power information is broadcast from the registered receiver.

8. The method of claim 7, wherein determining whether the transmitter is capable of supplying the required power comprises:

calculating remaining power of the transmitter based on the charging power information; and

determining whether the remaining power is larger than the required power.

9. The method of claim 8, further comprising determining that the transmitter is capable of supplying the required power, when the remaining power is larger than the required power.

10. The method of claim 8, further comprising determining that the transmitter is not capable of supplying the required power, when the remaining power is not larger than the required power.

11. A receiver in a wireless power transmission and reception system, the receiver comprising:

a communication interface that receives required power information transmitted from a joining receiver in a charging area to which a transmitter supplies wireless power; and

a receiver (Rx) Micro Control Unit (MCU) that determines whether the transmitter is capable of supplying required power to the joining receiver based on the required power information, and that requests the joining receiver to maintain a standby state when the transmitter is not capable of supplying the required power to the joining receiver.

12. The receiver of claim 11, wherein the Rx MCU controls the communication interface to receive charging power information from a registered receiver included in the charging area.

13. The receiver of claim 12, wherein the Rx MCU calculates remaining power of the transmitter based on the charging power information, determines whether the remaining power is larger than the required power, and determines that the transmitter is capable of supplying the required power to the joining receiver when the remaining power is larger than the required power.

14. The receiver of claim 13, wherein the Rx MCU determines that the transmitter is not capable of supplying the required power to the joining receiver when the remaining power is not larger than the required power.