Wireless power receiver

• US 10,045,398 B2
• Filed: 09/03/2015
• Issued: 08/07/2018
• Est. Priority Date: 09/23/2014
• Status: Expired due to Fees

• Current Assignee: Wit Co., Ltd.
• Original Assignee: Samsung Electro-Mechanics Co., Ltd. (Samsung Group)
• Inventors: Nam, Isaac, Chang, Ki Won, Kim, Choon Hee, Lim, Hyun Keun
• Primary Examiner(s): Poos, John
• Application Number:
  US14/844,484
• Publication Number:
  US 20160087451A1
• Time in Patent Office: 1,069 Days
• Field of Search: 307104
• CPC Class Codes: H02J 50/10 using inductive coupling
• 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 5/24 Inductive coupling
• CPC Class Codes: H04B 5/72 for local intradevice communication
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer
• CPC Class Codes: H04W 88/02 Terminal devices

Abstract

A wireless power receiver includes a resonance circuit, a power receiver, and a data transmitter. The power receiver is configured to control the resonance circuit to receive wireless power. The data transmitter is configured to control the resonance circuit to transmit data.

Claims

1. A wireless power receiver, comprising:

a resonance circuit comprising a resonance tank and a rectifying circuit, the rectifying circuit comprising switches;

a power receiver configured to control the resonance circuit to receive wireless power by the resonance tank; and

a data transmitter configured to control the resonance circuit to transmit data by the resonance tank, the data comprising card information,

wherein the data transmitter provides a second driving signal to transmit the data to the switches, and the second driving signal is a series of square waves to transmit the card information.

2. The wireless power receiver of claim 1, wherein the power receiver provides a first driving signal for receiving wireless power to the switches.

3. The wireless power receiver of claim 1, wherein the rectifying circuit converts the data represented by the square waves into a wireless communications waveform.

4. The wireless power receiver of claim 1, wherein the power receiver operates mutually exclusively to the data transmitter.

5. The wireless power receiver of claim 2, wherein the resonance tank is configured to magnetically couple to a transmitting coil of an external wireless power transmitter.

6. The wireless power receiver of claim 2, wherein the resonance tank is configured to magnetically couple to a coil of an external magnetic card reader.

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

a controller configured to control so that one of the power receiver or the data transmitter is operated.

8. A wireless power receiver, comprising:

a resonance circuit comprising a resonance tank and switches connected to the resonance tank;

a driving circuit configured to apply a driving signal to the switches so that the resonance circuit receives wireless power in a first mode and transmits data in a second mode;

a power receiver configured to provide a first control signal for receiving wireless power to the driving circuit; and

a data transmitter configured to provide a second control signal for transmitting the data to the driving circuit,

wherein the switches comprise first and second switches connected to one end of the resonance tank, and third and fourth switches connected to another end of the resonance lank, and

wherein the power receiver generates the first control signal to operate the second and third switches after the first and fourth switches are operated.

9. The wireless power receiver of claim 8, wherein the switches are included in a converter converting the data input as the driving signal into a wireless communications waveform.

10. The wireless power receiver of claim 8, wherein the switches are included in a rectifying circuit rectifying a current received by the resonance tank.

11. The wireless power receiver of claim 8, wherein the resonance circuit receives wireless power using a frequency of 350 kHz or less, and transmits the data using a frequency of 50 kHz to 300 kHz.

12. A resonance circuit, comprising:

a resonance tank comprising a coil and a capacitor, the resonance tank configured to magnetically couple to a wireless power transmitter to receive wireless power and further configured to magnetically couple to a card reader to transmit data; and

a rectifying circuit comprising switches connected to the resonance tank, the rectifying circuit configured to wirelessly receive or rectify the power and further configured to transmit the data based on a driving signal.

13. The resonance circuit of claim 12, wherein the rectifying circuit is further configured to perform a switching operation according to the driving signal to rectify a current received at the resonance tank.

14. The resonance circuit of claim 12, wherein the rectifying circuit is further configured to perform a switching operation according to the driving signal to allow the resonance tank to transmit the data or to receive the wireless power.

15. The resonance circuit of claim 12, wherein the switches are operated according to the driving signal input from a data transmitter or a power receiver.

16. The resonance circuit of claim 15, wherein the power receiver and the data transmitter operate in a mutually exclusive manner.

17. The resonance circuit of claim 15, wherein a driving circuit receives the driving signal from the power receiver or the data transmitter, and applies the driving signal to the switches so that the resonance circuit receives the wireless power or transmits the data.

18. The resonance circuit of claim 12, wherein first and second switches are connected to one end of the resonance tank and third and fourth switches are connected to another end of the resonance tank, wherein a control signal controls the second and third switches to operate after the first and fourth switches are operated.

19. The resonance circuit of claim 12, wherein the switches are in a converter configured to convert the data into a wireless communications waveform.