Electronic apparatus, power feeding method, and power feeding system

• US 9,219,379 B2
• Filed: 09/12/2011
• Issued: 12/22/2015
• Est. Priority Date: 10/15/2010
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Uramoto, Yoichi, Tanaka, Masayuki
• Primary Examiner(s): Nguyen, Vinh
• Assistant Examiner(s): DICKINSON, DUSTIN R
• Application Number:
  US13/137,773
• Publication Number:
  US 20120091993A1
• Time in Patent Office: 1,562 Days
• Field of Search: 324/76.75, 324/654, 324/655, 324/658, 324/686
• US Class Current: 1/1
• CPC Class Codes: G01V 3/101 by measuring the impedance of the search coil; by measuring features of a resonant circuit comprising the search coil measuring impedance or characteristics derived therefrom G01R27/00, e.g. quality factor G01R27/26
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/60 responsive to the presence of foreign objects, e.g. detection of living beings
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• 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 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 7/00302 Overcharge protection
• CPC Class Codes: H02J 7/00309 Overheat or overtemperature protection
• CPC Class Codes: H04B 5/26 using coils
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer

Abstract

Disclosed herein is an electronic apparatus, including an electric power receiving portion receiving an electric power from a power feeding apparatus by using a magnetic field, and a detecting portion detecting presence or absence of a foreign object between said power feeding apparatus and said detecting portion.

Claims

1. An electronic apparatus comprising:

a magnetic material layer between a substrate and an antenna pattern layer;

windings of a coil within said antenna pattern layer;

a plurality of positive electrodes and a plurality of negative electrodes disposed on said substrate to penetrate said magnetic material layer and said antenna pattern layer, wherein said windings surround said plurality of positive electrodes;

wherein said electronic apparatus is charged from a power feeding apparatus based on a pairing of said coil and a coil of said power feeding apparatus;

wherein presence of a foreign object disposed between the electronic apparatus and said power feeding apparatus is determined based on a change of at least one of an impedance, a current and a voltage developed across a positive electrode of said plurality of positive electrodes and a negative electrode of said plurality of negative electrodes corresponding to a voltage applied between said positive electrode and said negative electrode.

2. The electronic apparatus according to claim 1, wherein said magnetic material layer touches said substrate and said antenna pattern layer.

3. The electronic apparatus according to claim 1, wherein said antenna pattern layer is a resin layer.

4. The electronic apparatus according to claim 1, wherein said substrate is an integrated circuit.

5. The electronic apparatus according to claim 1, wherein said magnetic material layer has a high magnetic permeability.

6. The electronic apparatus according to claim 1, wherein said magnetic material layer is a material selected from the group consisting of an iron series metal and a ferrite.

7. The electronic apparatus according to claim 1, wherein said magnetic material layer is configured to provide magnetic isolation between said antenna pattern layer and said substrate.

8. The electronic apparatus according to claim 1, wherein said plurality of positive electrodes touch said substrate.

9. The electronic apparatus according to claim 1, further comprising:

a circuit portion configured to detect said presence of said foreign object between said antenna pattern layer and said power feeding apparatus, wherein said power feeding apparatus is configured to electrically charge the electronic apparatus.

10. The electronic apparatus according to claim 9, wherein said circuit portion is within said substrate.

11. The electronic apparatus according to claim 9, wherein the electronic apparatus is connectable to said power feeding apparatus.

12. The electronic apparatus according to claim 9, wherein said circuit portion is configured to apply said voltage across said plurality of positive electrodes and said plurality of negative electrodes.

13. The electronic apparatus according to claim 12, wherein said plurality of negative electrodes touch said substrate.

14. The electronic apparatus according to claim 12, wherein said windings surround said plurality of the negative electrodes.

15. A power feeding system comprising:

the electronic apparatus according to claim 9;

wherein said power feeding apparatus is configured to wirelessly transmit an electromagnetic wave to the electronic apparatus.

16. The power feeding system according to claim 15, wherein said coil is configured to receive said electromagnetic wave.

17. The power feeding system according to claim 15, wherein identification information is exchanged between said power feeding apparatus and the electronic apparatus, said identification information being used to authenticate said power feeding apparatus and the electronic apparatus.

18. The electronic apparatus according to claim 1, wherein said plurality of negative electrodes and said plurality of positive electrodes are alternately arranged at a predetermined pitch.

19. The electronic apparatus according to claim 1, wherein said plurality of negative electrodes and said plurality of positive electrodes are rod-shaped.

20. The electronic apparatus according to claim 1, wherein said plurality of negative electrodes and said plurality of positive electrodes are of a predetermined height in a direction of penetration into said magnetic material layer and said antenna pattern layer.

21. The electronic apparatus according to claim 1,

wherein said coil within said antenna pattern layer has a predetermine number of windings.

22. The electronic apparatus according to claim 1, wherein presence of said foreign object is based on a comparison of said change of at least one of said impedance, said current or said voltage with a threshold value.

23. The electronic apparatus according to claim 1, wherein said plurality of positive electrodes and said plurality of negative electrodes are arranged in a lattice-like pattern.

24. The electronic apparatus according to claim 1 , wherein said plurality of positive electrodes and said plurality of negative electrodes are arranged in a comb teeth-like structure.

25. The electronic apparatus according to claim 1, wherein said plurality of positive electrodes and said plurality of negative electrodes are annular shaped, and

wherein said plurality of positive electrodes and said plurality of negative electrodes are concentrically arranged.