Systems and methods for selective wireless power transfer

• US 8,547,057 B2
• Filed: 08/04/2010
• Issued: 10/01/2013
• Est. Priority Date: 11/17/2009
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Martin, Roger Wayne, Selby, MaryBeth, Maldonado, David, El-Maleh, Khaled Helmi, Karmi, Yair, Dunworth, Jeremy D
• Primary Examiner(s): TSO, EDWARD H
• Application Number:
  US12/850,542
• Publication Number:
  US 20110115431A1
• Time in Patent Office: 1,154 Days
• Field of Search: 320/107, 320/108, 307/104
• US Class Current: 320/108
• CPC Class Codes: G06Q 30/0267 Wireless devices
• CPC Class Codes: G06Q 30/0601 Electronic shopping [e-shopping]
• CPC Class Codes: H02J 50/10 using inductive coupling
• 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 50/40 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 7/00034 Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge
• CPC Class Codes: H02J 7/00036 Charger exchanging data with battery
• 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: H02J 7/0071 with a programmable schedule
• CPC Class Codes: H02J 7/04 Regulation of charging current or voltage
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer

Abstract

Exemplary embodiments are directed to selective wireless power transfer. A method may include transferring wireless power to at least one electronic device while varying at least one parameter of the wireless power transfer according to a wireless power transfer scenario.

Claims

1. A method for charging an electronic device, comprising:

transferring wireless power to at least one electronic device;

varying at least one parameter of the wireless power transfer according to a wireless power transfer scenario; and

transmitting an information signal identifying the at least one parameter of wireless power transmission to be varied according to the wireless power transfer scenario to one or more electronic devices.

2. The method of claim 1, wherein varying at least one parameter of the wireless power transfer according to a wireless power transfer scenario comprises varying the at least one parameter of the wireless power transfer according to pseudo-random sequence.

3. The method of claim 1, wherein varying at least one parameter of the wireless power transfer according to a wireless power transfer scenario comprises varying the at least one parameter of the wireless power transfer according to time-dependent pattern.

4. The method of claim 1, wherein transmitting an information signal comprises transmitting an encrypted code identifying the at least one parameter of wireless power transmission to be varied according to the wireless power transfer scenario.

5. The method of claim 1, wherein varying at least one parameter of the wireless power transfer comprises varying at least one of a frequency and an impedance of wireless power transmission.

6. The method of claim 1, wherein transferring wireless power comprises utilizing a transfer function to decrease out-of-band power emissions.

7. A device for charging an electronic, comprising:

a wireless power transmitter, said wireless power transmitter configured to;

transmit wireless power,

vary at least one parameter of the wireless power transmission according to a wireless power transfer scenario, and

transmit an information signal identifying the at least one parameter of wireless power transmission to be varied according to the wireless power transfer scenario to one or more electronic devices.

8. The device of claim 7, wherein the wireless power transfer scenario comprises a time-dependent pattern.

9. The device of claim 7, wherein the wireless power transmitter is configured to vary at least one of a frequency and an impedance of the wireless power transmission.

10. A method for charging an electronic device, comprising:

receiving wireless power at an electronic device;

by varying at least one parameter of a wireless receiver of the electronic device according to a wireless power transfer scenario; and

receiving an information signal identifying the at least one parameter and a sequence at which the at least one parameter is varied.

11. The method of claim 10, wherein varying at least one parameter of a wireless receiver of the electronic device according to a wireless power transfer scenario comprises varying at least one parameter of a wireless receiver of the electronic device according to a pseudo-random sequence.

12. The method of claim 10, wherein varying at least one parameter of a wireless receiver of the electronic device according to a wireless power transfer scenario comprises varying at least one parameter of a wireless receiver of the electronic device according to a time-dependent pattern.

13. The method of claim 10, wherein receiving an information signal comprises receiving an encrypted code identifying the at least one parameter and a pseudo-random sequence at which the at least one parameter is varied.

14. The method of claim 10, wherein varying at least one parameter comprises varying at least one of a frequency at which the wireless receiver resonates and an impedance of the wireless receiver.

15. The method of claim 10, wherein varying at least one parameter comprises varying at least one parameter of a wireless receiver to match an associated at least one parameter of a wireless power transmitter.

20. The method of claim 10, wherein the sequence comprises a pseudo-random sequence.

16. A device for charging an electronic device, comprising:

a wireless power receiver, said wireless power receiver configured to;

receive wireless power,

vary at least one parameter thereof according to a sequence, and receive an information signal identifying the at least one parameter and the sequence at which the at least one parameter is varied.

17. The device claim 16, wherein the device is configured to vary at least one of a frequency at which the wireless power receiver resonates and an impedance of the wireless power receiver.

21. The device of claim 16, wherein the sequence comprises a pseudo-random sequence.

18. A device for charging an electronic device, comprising:

means for transmitting an information signal identifying a wireless power transfer scenario;

means for transmitting wireless power; and

means for varying at least one parameter of an associated wireless transmitter according to the wireless power transfer scenario.

22. The device of claim 18, wherein means for varying at least one parameter of an associated wireless transmitter according to the wireless power transfer scenario comprises means for varying the at least one parameter of the wireless power transfer according to pseudo- random sequence.

23. The device of claim 18, wherein means for varying at least one parameter of an associated wireless transmitter according to the wireless power transfer scenario comprises means for varying the at least one parameter of the wireless power transfer according to time-dependent pattern.

24. The device of claim 18, wherein means for transmitting an information signal comprises means for transmitting an encrypted code identifying the at least one parameter of wireless power transmission to be varied according to the wireless power transfer scenario.

25. The device of claim 18, wherein means for varying at least one parameter of an associated wireless transmitter according to the wireless power transfer scenario comprises means for varying at least one of a frequency and an impedance of wireless power transmission.

19. A device for charging an electronic device, comprising:

means for receiving an information signal identifying a wireless power transfer scenario;

means for receiving wireless power; and

means for varying at least one parameter of an associated wireless receiver according to the wireless power transfer scenario.

26. The device of claim 19, wherein means for varying at least one parameter of an associated wireless receiver according to the wireless power transfer scenario comprises means for varying at least one parameter of a wireless receiver of the electronic device according to a pseudo-random sequence.

27. The device of claim 19, wherein means for varying at least one parameter of an associated wireless receiver according to the wireless power transfer scenario comprises means for varying at least one parameter of a wireless receiver of the electronic device according to a time-dependent pattern.

28. The device of claim 19, wherein means for receiving an information signal comprises means for receiving an encrypted code identifying the at least one parameter and a pseudo-random sequence at which the at least one parameter is varied.

29. The device of claim 19, wherein means for varying at least one parameter of an associated wireless receiver according to the wireless power transfer scenario comprises means for varying at least one of a frequency at which the wireless receiver resonates and an impedance of the wireless receiver.

30. The device of claim 19, wherein means for varying at least one parameter of an associated wireless receiver according to the wireless power transfer scenario comprises means for varying at least one parameter of a wireless receiver to match an associated at least one parameter of a wireless power transmitter.