Power feeding unit, power receiving unit, and feed system

• US 10,523,051 B2
• Filed: 09/28/2016
• Issued: 12/31/2019
• Est. Priority Date: 10/09/2013
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Washiro, Takanori
• Primary Examiner(s): Borroto, Alfonso Perez
• Application Number:
  US15/278,967
• Publication Number:
  US 20170018964A1
• Time in Patent Office: 1,189 Days
• Field of Search: 307104, 439 39, 335290
• 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 5/22 Capacitive 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

Abstract

A power feeding unit includes: a power feeding electrode configured to be coupled through an electric field with a power receiving electrode of a power receiving unit; a power feeding section configured to feed the power receiving unit with power through the power feeding electrode; and a power feeding side communication section configured to communicate with the power receiving unit through the power feeding electrode.

Claims

1. A power feeding unit comprising:

a power feeding section configured to transmit electric power;

a communication section configured to acquire identification data from a power receiving unit after the communication section outputs a request; and

a control section configured to perform an authentication in a manner that determines whether or not the communication section has acquired the identification data,

wherein the control section is configured to control the power feeding section to inhibit the power feeding section from outputting the electric power to the power receiving unit when the control section determines that the communication section has not acquired the identification data.

2. The power feeding unit according to claim 1, wherein the control section is configured to again perform the authentication after waiting for a predetermined time interval.

3. The power feeding unit according to claim 2, wherein the communication section is configured to again output the data request after passage of the predetermined time interval.

4. The power feeding unit according to claim 1, wherein the request is a command for the power receiving unit to output the identification data.

5. The power feeding unit according to claim 1, wherein the control section is configured to again perform the authentication when the communication section has acquired the identification data.

6. The power feeding unit according to claim 1, wherein the control section is configured to again perform the authentication when the communication section has not acquired the identification data.

7. The power feeding unit according to claim 1, wherein the communication section is configured to output the request when the power receiving unit is placed onto the power feeding unit.

8. The power feeding unit according to claim 1, wherein the communication section is configured to again output the data request before the control section again performs the authentication.

9. The power feeding unit according to claim 1, wherein the electric power is a power superimposed with the request.

10. The power feeding unit according to claim 1, wherein the power feeding section is configured to output the electric power when the power receiving unit is placed onto the power feeding unit.

11. The power feeding unit according to claim 1, wherein the power feeding section is controllable by the control section in a manner that the control section permits the power feeding section to output the electric power to the power receiving unit when the control section determines that the communication section has acquired the identification data.

12. The power feeding unit according to claim 1, wherein the communication section is configured to output the data request before the power feeding section outputs the electric power.

13. The power feeding unit according to claim 1, wherein the power feeding section is configured to output the electric power via a first frequency band.

14. The power feeding unit according to claim 13, wherein the communication section is configured to output the data request via a second frequency band.

15. The power feeding unit according to claim 14, wherein the first frequency band is different from the second frequency band.

16. The power feeding unit according to claim 14, wherein the first frequency band does not overlap the second frequency band.

17. The power feeding unit according to claim 14, wherein the power feeding section is between the control section and a low pass filter, the low pass filter is configured to pass the first frequency band while inhibiting passage of the second frequency band.

18. The power feeding unit according to claim 17, wherein the communication section is between the control section and a high pass filter, the high pass filter is configured to pass the second frequency band while inhibiting passage of the first frequency band.

19. The power feeding unit according to claim 18, further comprising:

an electrode configured to wirelessly output the request and the electric power.

20. The power feeding unit according to claim 19, wherein the electrode is electrically connected directly to the low pass filter and the high pass filter.

21. A power feeding system comprising:

the power feeding unit according to claim 1; and

the power receiving unit.