POWER RECEIVING DEVICE, POWER FEEDING DEVICE, AND ELECTRONIC APPARATUS

• US 20170149287A1
• Filed: 06/24/2015
• Published: 05/25/2017
• Est. Priority Date: 07/09/2014
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Abe, Masayoshi, Matsui, Ken, Takanohashi, Kazukuni, Kozakai, Osamu, Nakano, Hiroaki, Tsuchiyama, Tomonori
• Granted Patent: US 10,523,061 B2
• Time in Patent Office: Days
• 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 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• CPC Class Codes: H02J 7/0042 characterised by the mechanical construction

Abstract

A power receiving device of the disclosure includes a power generator, a detector, and a controller. The power generator includes a power receiving element that receives a power signal supplied in a wireless manner from a power feeding device, and generates direct current power on the basis of the power signal. The detector includes a detection element, and drives the detection element and detects an alternating current signal generated in the detection element, during a power receiving period in which the power receiving element receives the power signal. The controller controls the power feeding device on the basis of a detection result of the detector.

Claims

1. A power receiving device comprising:

a power generator including a power receiving element that receives a power signal supplied in a wireless manner from a power feeding device, the power generator generating direct current power on a basis of the power signal;

a detector including a detection element, the detector driving the detection element and detecting an alternating current signal generated in the detection element, during a power receiving period in which the power receiving element receives the power signal; and

a controller that controls the power feeding device on a basis of a detection result of the detector.

2. The power receiving device according to claim 1, wherein

the detector drives the detection element in an intermittent manner,

the controller

sets a determination condition on a basis of one detection result of a plurality of detection results of the detector, and

controls the power feeding device in response to whether each of detection results subsequent to the one detection result satisfies the determination condition.

3. The power receiving device according to claim 2, wherein

the power feeding device detects absence of a foreign matter between the power feeding device and the power receiving device, and

the detector acquires the one detection result after the power feeding device has detected the absence of the foreign matter.

4. The power receiving device according to claim 2, wherein

the controller controls the power feeding device to stop power feeding when any of the detection results fails to satisfy the determination condition.

5. The power receiving device according to claim 1, wherein

the detector detects amplitude or a phase, or both of the alternating current signal.

6. The power receiving device according to claim 1, wherein

a frequency of the alternating current signal differs from a frequency of the power signal.

7. The power receiving device according to claim 1, wherein

the detector drives the detection element by using a pulse signal.

8. The power receiving device according to claim 1, wherein

the power receiving element includes a coil.

9. The power receiving device according to claim 1, wherein

the power receiving element includes an electrode.

10. The power receiving device according to claim 1, wherein

the detection element includes a coil.

11. The power receiving device according to claim 1, wherein

the detection element includes an electrode.

12. A power feeding device comprising:

a power feeder including a power feeding element, the power feeder generating a power signal to be supplied in a wireless manner to a power receiving device and outputting the power signal through the power feeding element;

a detector including a detection element, the detector driving the detection element and detecting an alternating current signal generated in the detection element, during a power feeding period in which the power feeding element outputs the power signal; and

a controller that controls the power feeder on a basis of a detection result of the detector.

13. An electronic apparatus comprising:

a power receiving device; and

a communication unit including a communication coil, the communication unit performing communication with an external apparatus by using the communication coil,

the power receiving device including

a power generator including a power receiving element that receives a power signal supplied in a wireless manner from a power feeding device, the power generator generating direct current power on a basis of the power signal, and

a controller that controls the communication unit to drive the communication coil and to make detection of an alternating current signal generated in the communication coil, during a power receiving period in which the power receiving element receives the power signal, and controls the power feeding device on a basis of a result of the detection.

14. The electronic apparatus according to claim 13, wherein the communication unit performs short-distance wireless communication.