Power supply apparatus and electronic apparatus configured to carry out wireless power supply

• US 10,374,660 B2
• Filed: 09/18/2015
• Issued: 08/06/2019
• Est. Priority Date: 09/22/2014
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Tsukamoto, Nobuyuki
• Primary Examiner(s): Tran, Thienvu V
• Assistant Examiner(s): Baxter, Brian K
• Application Number:
  US14/858,849
• Publication Number:
  US 20160087690A1
• Time in Patent Office: 1,418 Days
• Field of Search: 307104
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 7/007 Regulation of charging or discharging current or voltage
• 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

A power supply apparatus includes a power supply unit configured to wirelessly supply power to an electronic apparatus, a communication unit configured to transmit, to the electronic apparatus, information indicating whether to perform a foreign object detection process for detecting a foreign object, and a control unit configured to cause the communication unit to transmit the information to the electronic apparatus before outputting of predetermined power to the electronic apparatus.

Claims

1. A power supply apparatus comprising:

an interface configured to establish a connection between the power supply apparatus and an electronic apparatus;

a communication unit configured to transmit, to the electronic apparatus, information indicating whether a foreign object detection process for detecting a foreign object is to be performed by the power supply apparatus;

a power supply unit configured to wirelessly supply power to the electronic apparatus; and

a control unit configured to;

cause the communication unit to transmit, to the electronic apparatus, the information indicating whether the power supply apparatus is to perform the foreign object detection process, after the power supply apparatus establishes the connection between the power supply apparatus and the electronic apparatus, and before the power supply apparatus outputs predetermined power to the electronic apparatus, and

in a case where the communication unit transmits the information indicating that the foreign object detection process is to be performed by the power supply apparatus, the control unit performs the foreign object detection process before the power supply apparatus outputs predetermined power to the electronic apparatus.

2. The power supply apparatus according to claim 1,

wherein the control unit determines whether to perform the foreign object detection process according to a magnitude of the predetermined power,

wherein the control unit causes the communication unit to transmit the information indicating that the foreign object detection process is to be performed by the power supply apparatus if it is determined to perform the foreign object detection process, and

wherein the control unit causes the communication unit to transmit information indicating that the foreign object detection process is not to be performed by the power supply apparatus if it is determined not to perform the foreign object detection process.

3. The power supply apparatus according to claim 1,

wherein the control unit causes the communication unit to transmit information indicating that the foreign object detection process is to be performed by the power supply apparatus if the predetermined power is higher than a first value, and

wherein the control unit causes the communication unit to transmit information indicating that the foreign object detection process is not to be performed by the power supply apparatus if the predetermined power is the first value or lower.

4. The power supply apparatus according to claim 1,

wherein the control unit determines whether to perform the foreign object detection process according to a length of a predetermined time during which the power supply unit outputs the predetermined power,

wherein the control unit causes the communication unit to transmit information indicating that the foreign object detection process is to be performed by the power supply apparatus if the control unit determines to perform the foreign object detection process, and

wherein the control unit causes the communication unit to transmit information indicating that the foreign object detection process is not to be performed by the power supply apparatus if the control unit determines not to perform the foreign object detection process.

5. The power supply apparatus according to claim 1,

wherein the control unit causes the communication unit to transmit information indicating that the foreign object detection process is to be performed by the power supply apparatus if a predetermined time during which the power supply unit outputs the predetermined power is a second value or longer, and

wherein the control unit causes the communication unit to transmit information indicating that the foreign object detection process is not to be performed by the power supply apparatus if the predetermined time is not the second value or longer.

6. The power supply apparatus according to claim 1,

wherein the control unit determines whether to perform the foreign object detection process according to a remaining capacity of a battery connected to the electronic apparatus,

wherein the control unit causes the communication unit to transmit information indicating that the foreign object detection process is to be performed by the power supply apparatus if the control unit determines to perform the foreign object detection process, and

wherein the control unit causes the communication unit to transmit information indicating that the foreign object detection process is not to be performed by the power supply apparatus if the control unit determines not to perform the foreign object detection process.

7. The power supply apparatus according to claim 1,

wherein the control unit causes the communication unit to transmit information indicating that the foreign object detection process is not to be performed by the power supply apparatus if a remaining capacity of a battery connected to the electronic apparatus is a third value or larger, and

wherein the control unit causes the communication unit to transmit information indicating that the foreign object detection process is to be performed by the power supply apparatus if the remaining capacity of the battery is not the third value or larger.

8. The power supply apparatus according to claim 1,

wherein the control unit determines whether to perform the foreign object detection process according to a magnitude of power requested from the electronic apparatus,

wherein the control unit causes the communication unit to transmit information indicating that the foreign object detection process is to be performed by the power supply apparatus if the control unit determines to perform the foreign object detection process, and

wherein the control unit causes the communication unit to transmit information indicating that the foreign object detection process is not to be performed by the power supply apparatus if the control unit determines not to perform the foreign object detection process.

9. The power supply apparatus according to claim 1, wherein the control unit performs the foreign object detection process with use of data regarding reflection of the power output from the power supply unit.

10. The power supply apparatus according to claim 1, wherein the control unit performs the foreign object detection process with use of data regarding an electric current flowing in the power supply unit.

11. The power supply apparatus according to claim 1, wherein the control unit causes the power supply unit to start outputting the predetermined power according to non-detection of a foreign object if the foreign object detection process is performed.

12. The power supply apparatus according to claim 1, wherein the control unit performs a process for limiting the power output from the power supply unit according to detection of a foreign object if the foreign object detection process is performed.

13. The power supply apparatus according to claim 1, wherein the control unit performs a process for reducing the power output from the power supply unit according to detection of a foreign object if the foreign object detection process is performed.

14. The power supply apparatus according to claim 1, wherein information indicating that the foreign object detection process is to be performed by the power supply apparatus, which is transmitted to the electronic apparatus by the communication unit, includes information indicating a time for performing the foreign object detection process.

15. The power supply apparatus according to claim 1, wherein information indicating that the foreign object detection process is to be performed by the power supply apparatus, which is transmitted to the electronic apparatus by the communication unit, includes information indicating a method for detecting the foreign object.

16. A method for controlling a power supply apparatus, the method comprising:

establishing a connection between the power supply apparatus and an electronic apparatus;

transmitting, to the electronic apparatus, information indicating whether a foreign object detection process for detecting a foreign object is to be performed by the power supply apparatus;

supplying power wirelessly to the electronic apparatus; and

performing control so as to;

cause the information to be transmitted to the electronic apparatus in the transmitting after the power supply apparatus establishes the connection between the power supply apparatus and the electronic apparatus, and before the power supply apparatus outputs predetermined power to the electronic apparatus, and

in a case where the information indicating that the foreign object detection process is to be performed by the power supply apparatus is transmitted, causing the foreign object detection process to be performed before the power supply apparatus outputs predetermined power to the electronic apparatus.