Power receiving apparatus, power transmitting apparatus, control method, and storage medium

• US 10,205,352 B2
• Filed: 02/10/2016
• Issued: 02/12/2019
• Est. Priority Date: 02/17/2015
• Status: Active Grant

• Current Assignee: Canon Ayutthaya Limited (Canon Inc.)
• Original Assignee: Canon Ayutthaya Limited (Canon Inc.)
• Inventors: Eguchi, Tadashi
• Primary Examiner(s): Cox, Cassandra
• Application Number:
  US15/040,120
• Publication Number:
  US 20160241047A1
• Time in Patent Office: 1,098 Days
• Field of Search: None
• 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

Abstract

A power receiving apparatus, that complies with at least two power transfer methods and receives power wirelessly from a power transmitting apparatus, detects unexpected power which is not power transmitted from the power transmitting apparatus while a first power transfer method is used out of the at least two power transfer methods. When the unexpected power is detected, the power receiving apparatus controls the power transmitting apparatus and the power receiving apparatus so that a second power transfer method which is different from the first power transfer method out of the at least two power transfer methods is used.

Claims

1. A power receiving apparatus that complies with at least two power transfer methods and receives power wirelessly from a power transmitting apparatus, comprising:

a detecting unit configured to detect power transmitted from another power transmitting apparatus which is different from the power transmitting apparatus while a first power transfer method is used out of the at least two power transfer methods; and

a control unit configured to control, when the power transmitted from the other power transmitting apparatus is detected, the power transmitting apparatus and the power receiving apparatus so that a second power transfer method different from the first power transfer method out of the at least two power transfer methods is used,

wherein a frequency used for wireless power transfer by the first power transfer method and a frequency used for wireless power transfer by the second power transfer method are different.

2. The power receiving apparatus according to claim 1, further comprising:

a communication unit capable of transmitting a signal to the power transmitting apparatus and receiving a signal from the power transmitting apparatus,

wherein when the power transmitted from the other power transmitting apparatus is detected while the first power transfer method is used, the control unit controls the communication unit so that a signal confirming whether compliance with power transmission by the second power transfer method is possible is transmitted to the power transmitting apparatus,

when the communication unit receives, from the power transmitting apparatus, a signal indicating that compliance with the power transmission by the second power transfer method is possible, the control unit further switches the power transfer method of the power receiving apparatus to the second power transfer method, and

when the power transmitting apparatus transmits the signal indicating that compliance with power transmission by the second power transfer method is possible, the power transmitting apparatus switches the power transfer method of the power transmitting apparatus to the second power transfer method.

3. The power receiving apparatus according to claim 2, wherein the signal which is transmitted by the communication unit and confirms whether compliance with the power transmission by the second power transfer method is possible includes information of the frequency used for wireless power transfer by the second power transfer method.

4. The power receiving apparatus according to claim 2, wherein when the communication unit does not receive, from the power transmitting apparatus, the signal indicating that compliance with the power transmission by the second power transfer method is possible, the control unit controls the power receiving apparatus so that the power transfer method of the power receiving apparatus is not switched.

5. The power receiving apparatus according to claim 1, further comprising:

a communication unit capable of transmitting a signal to the power transmitting apparatus,

wherein when power transmitted by the other power transmitting apparatus is detected while the first power transfer method is used, the control unit controls the power receiving apparatus to use the second power transfer method and controls the communication unit to transmit to the power transmitting apparatus a signal which instructs power to be transmitted by the second power transfer method.

6. The power receiving apparatus according to claim 1, wherein the detecting unit further detects the power transmitted from the other power transmitting apparatus after the power transfer method used by the power receiving apparatus and the power transmitting apparatus is switched, and

when the power transmitted from the other power transmitting apparatus is detected by either of the at least two power transfer methods, the control unit controls so that the power transfer with the power transmitting apparatus is terminated.

7. A control method for a power receiving apparatus that complies with at least two power transfer methods and receives power wirelessly from a power transmitting apparatus, comprising:

detecting power transmitted from another power transmitting apparatus which is different from the power transmitting apparatus while a first power transfer method is used out of the at least two power transfer methods; and

when the power transmitted from the other power transmitting apparatus is detected, controlling the power transmitting apparatus and the power receiving apparatus so that a second power transfer method different from the first power transfer method out of the at least two power transfer methods is used,

wherein a frequency used for wireless power transfer by the first power transfer method and a frequency used for wireless power transfer by the second power transfer method are different.

8. A non-transitory computer-readable storage medium storing a computer program for causing a computer, provided in a power receiving apparatus that complies with at least two power transfer methods and receives power wirelessly from a power transmitting apparatus,

to detect power transmitted from another power transmitting apparatus which is different from the power transmitting apparatus while a first power transfer method is used out of the at least two power transfer methods;

and

when the power transmitted from the other power transmitting apparatus is detected, to control the power transmitting apparatus and the power receiving apparatus so that a second power transfer method different from the first power transfer method out of the at least two power transfer methods is used,

wherein a frequency used for wireless power transfer by the first power transfer method and a frequency used for wireless power transfer by the second power transfer method are different.

9. A power transmitting apparatus that complies with at least two power transfer methods and transmits power wirelessly to a power receiving apparatus, comprising:

a power transmitting unit configured to transmit power to the power receiving apparatus by using one of the at least two power transfer methods;

a detecting unit configured to detect that, while a first power transfer method is used out of the at least two power transfer methods, at least either the power receiving apparatus receives power transmitted from another power transmitting apparatus or another power receiving apparatus receives power transmitted from the power transmitting apparatus, that is caused by that the other power transmitting apparatus and the other power receiving apparatus perform power transfer; and

a control unit configured to control, when the detecting unit detects that at least either the power receiving apparatus receives power transmitted from the other power transmitting apparatus or the other power receiving apparatus receives power transmitted from the power transmitting apparatus, the power transmitting unit to use a second power transfer method different from the first power transfer method out of the at least two power transfer methods,

wherein a frequency used for wireless power transfer by the first power transfer method and a frequency used for wireless power transfer by the second power transfer method are different.

10. The power transmitting apparatus according to claim 9, further comprising:

a communication unit capable of transmitting a signal to the power receiving apparatus and receiving a signal from the power receiving apparatus,

wherein when the detecting unit detects that at least either the power receiving apparatus receives power transmitted from the other power transmitting apparatus or the other power receiving apparatus receives power transmitted from the power transmitting apparatus while the first power transfer method is used, the control unit controls the communication unit so that a signal confirming whether compliance with power reception by the second power transfer method is possible is transmitted to the power receiving apparatus,

when the communication unit receives, from the power receiving apparatus, a signal indicating that compliance with the power reception by the second power transfer method is possible, the control unit further controls the power transmitting unit so that the power transfer method of the power transmitting apparatus is switched to the second power transfer method, and

when the power receiving apparatus transmits the signal indicating that compliance with power reception by the second power transfer method is possible, the power receiving apparatus switches the power transfer method of the power receiving apparatus to the second power transfer method.

11. The power transmitting apparatus according to claim 10, wherein a signal which is transmitted by the communication unit and confirms whether compliance with power reception by the second power transfer method is possible includes information of a frequency that the power transmitting apparatus can transmit power by the second power transfer method.

12. The power transmitting apparatus according to claim 10, wherein when the communication unit does not receive, from the power receiving apparatus, a signal indicating that compliance with power reception by the second power transfer method is possible, the control unit controls the power transmitting unit so the power transfer method of the power transmitting apparatus is not switched.

13. The power transmitting apparatus according to claim 9, further comprising:

a communication unit capable of transmitting a signal to the power receiving apparatus,

wherein when the detecting unit detects that at least either the power receiving apparatus receives power transmitted from the other power transmitting apparatus or the other power receiving apparatus receives power transmitted from the power transmitting apparatus while the first power transfer method is used, the control unit controls the power transmitting unit to use the second power transfer method and controls the communication unit to transmit to the power receiving apparatus a signal which instructs power to be received by the second power transfer method.

14. The power transmitting apparatus according to claim 9, wherein the detecting unit detects that, based on reception power amount of the power receiving apparatus, at least either the power receiving apparatus receives power transmitted from the other power transmitting apparatus or the other power receiving apparatus receives power transmitted from the power transmitting apparatus.

15. The power transmitting apparatus according to claim 14, wherein the detecting unit obtains power transmission/reception efficiency from the reception power amount and transmission power amount transmitted by the power transmitting apparatus and detects that, based on the power transmission/reception efficiency, at least either the power receiving apparatus receives power transmitted from the other power transmitting apparatus or the other power receiving apparatus receives power transmitted from the power transmitting apparatus.

16. The power transmitting apparatus according to claim 15, wherein the detecting unit detects, based on a change in the power transmission/reception efficiency after detecting a signal or power transmitted by the other power transmitting apparatus or the other power receiving apparatus, that at least either the power receiving apparatus receives power transmitted from the other power transmitting apparatus or the other power receiving apparatus receives power transmitted from the power transmitting apparatus.

17. The power transmitting apparatus according to claim 9, wherein the detecting unit further detects, after the power transfer method used by the power receiving apparatus and the power transmitting apparatus is switched, that at least either the power receiving apparatus receives power transmitted from the other power transmitting apparatus or the other power receiving apparatus receives power transmitted from the power transmitting apparatus, and

when it is detected that at least either the power receiving apparatus receives power transmitted from the other power transmitting apparatus or the other power receiving apparatus receives power transmitted from the power transmitting apparatus in either one of the at least two power transfer methods, the control unit controls the power transmitting unit so that power transfer with the power receiving apparatus is terminated.

18. A control method for a power transmitting apparatus that includes a power transmitting unit configured to transmit power to a power receiving apparatus by using one of at least two power transfer methods, complies with the at least two power transfer methods, and transmits power wirelessly to the power receiving apparatus, comprising:

detecting, while a first power transfer method is used out of the at least two power transfer methods, that at least either the power receiving apparatus receives power transmitted from another power transmitting apparatus or another power receiving apparatus receives power transmitted from the power transmitting apparatus, that is caused by that the other power transmitting apparatus and the other power receiving apparatus perform power transfer; and

when detected that at least either the power receiving apparatus receives power transmitted from the other power transmitting apparatus or the other power receiving apparatus receives power transmitted from the power transmitting apparatus, controlling the power transmitting unit to use a second power transfer method different from the first power transfer method out of the at least two power transfer methods,

wherein a frequency used for wireless power transfer by the first power transfer method and a frequency used for wireless power transfer by the second power transfer method are different.

19. A non-transitory computer-readable storage medium storing a computer program for causing a computer, provided in a power transmitting apparatus that includes a power transmitting unit configured to transmit power to a power receiving apparatus by using one of at least two power transfer methods, complies with at least two power transfer methods, and transmits power wirelessly to a power receiving apparatus,

to detect, while a first power transfer method is used out of the at least two power transfer methods, that at least either the power receiving apparatus receives power transmitted from another power transmitting apparatus or another power receiving apparatus receives power transmitted from the power transmitting apparatus, that is caused by that the other power transmitting apparatus and the other power receiving apparatus perform power transfer, and

when detected that at least either the power receiving apparatus receives power transmitted from the other power transmitting apparatus or the other power receiving apparatus receives power transmitted from the power transmitting apparatus, to control the power transmitting unit to use a second power transfer method different from the first power transfer method out of the at least two power transfer methods,

wherein a frequency used for wireless power transfer by the first power transfer method and a frequency used for wireless power transfer by the second power transfer method are different.