Wireless power receiver and control method of same

• US 9,356,475 B2
• Filed: 11/14/2012
• Issued: 05/31/2016
• Est. Priority Date: 11/16/2011
• Status: Expired due to Fees

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kim, Joon-Il, Park, Se-Ho, Park, Sung-Bum, Lee, Young-Min, Lee, Woo-Ram
• Primary Examiner(s): Kitov, Zeev V
• Application Number:
  US13/676,722
• Publication Number:
  US 20130119780A1
• Time in Patent Office: 1,294 Days
• US Class Current: 1/1
• 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 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• CPC Class Codes: H04B 5/75 for isolation purposes

Abstract

A wireless power receiver is provided that includes a communication unit for receiving wireless power and a communication signal from a wireless power supplier; a controller for determining whether the wireless power is received from the wireless power supplier; a loader for storing the wireless power; and a switching unit for, when the wireless power is received, dividing the wireless power and the communication signal by a predetermined ratio and transferring the divided power to the controller and the loader based on the predetermined ratio.

Claims

1. A wireless power receiver comprising:

a communication unit for receiving wireless power and a communication signal from a wireless power supplier, wherein the received wireless power and received communication signal power are a total input power;

a controller for determining whether the wireless power is received from the wireless power supplier;

a loader for storing the received wireless power; and

a switching unit for, when the wireless power is determined to have been received, dividing the total input power by a predetermined ratio and transferring the divided power to the controller and the loader, based on the predetermined ratio.

2. The wireless power receiver of claim 1, wherein the switching unit comprises:

a first switch for switching between the communication unit and the controller; and

a second switch for switching the controller,

wherein the first switch and the second switch are connected in parallel.

3. The wireless power receiver of claim 2, wherein, when the communication unit simultaneously receives the wireless power and the communication signal, the controller opens the first switch and closes the second switch.

4. The wireless power receiver of claim 3, wherein the second switch outputs the total input power to the controller and the communication unit according to the predetermined ratio.

5. The wireless power receiver of claim 2, wherein, when the communication unit receives only the communication signal, the first switch is closed and the second switch is open.

6. The wireless power receiver of claim 1, further comprising:

a rectifier for rectifying the wireless power; and

a regulator for transferring the rectified wireless power to the loader.

7. A method of controlling a wireless power receiver, the method comprising:

receiving wireless power and a communication signal from a wireless power supplier;

determining whether the wireless power is received from the wireless power supplier;

when the wireless power is determined to have been received, dividing the wireless power and the communication signal by a predetermined ratio; and

transferring the divided total power through different paths to store the wireless power and to process the communication signal.

8. The method of claim 7, further comprising:

rectifying the wireless power to a DC waveform; and

filtering the rectified wireless power.

9. A wireless power receiver comprising:

a communication unit for receiving wireless power and a communication signal having different frequencies from a wireless power supplier;

a controller for generating a signal corresponding to the received communication signal;

a loader for storing the received wireless power; and

a frequency selector for distinguishing the frequencies of the received wireless power and the received communication signal, and for outputting the received wireless power and the received communication signal to the loader and the controller, respectively.

10. The wireless power receiver of claim 9, wherein the frequency selector comprises:

a first filter for filtering the received wireless power; and

a second filter for filtering the received communication signal.

11. The wireless power receiver of claim 10, wherein the first filter filters the received wireless power and outputs the received communication signal to the controller and the second filter filters the received communication signal and outputs the received wireless power to the loader.

12. The wireless power receiver of claim 9, further comprising:

a rectifier for rectifying the wireless power; and

a regulator for transferring the rectified wireless power to the loader.

13. A method of controlling a wireless power receiver, the method comprising:

receiving wireless power and a communication signal having different frequencies from a wireless power supplier;

distinguishing the frequencies of the received wireless power and the received communication signal, and independently outputting the received wireless power and the received communication signal;

storing the received wireless power; and

generating a signal corresponding to the received communication signal.

14. The method of claim 13, wherein independently outputting the received wireless power and the received communication signal comprises:

performing a first filtering of the wireless power and outputting the communication signal through a first path; and

performing a second filtering of the communication signal and outputting the wireless power through a second path.

15. The method of claim 13, further comprising:

rectifying the wireless power; and

transferring the rectified wireless power.

16. A method of controlling a wireless power receiver, the method comprising:

receiving wireless power and a communication signal from a wireless power supplier;

determining whether frequencies of the received wireless power and the received communication signal are equal;

when the frequencies of the received wireless power and the received communication signal are equal, dividing a total input power of the received wireless power and the received communication signal by a predetermined ratio and independently processing the received wireless power and the received communication signal based on the predetermined ratio; and

when the frequencies of the received wireless power and the received communication signal are different, distinguishing the frequencies of the received wireless power and the received communication signal and independently processing the received wireless power and the received communication signal.