Power transmitting apparatus, power receiving apparatus, control methods therefor, program, and computer-readable storage medium

• US 9,985,477 B2
• Filed: 09/10/2014
• Issued: 05/29/2018
• Est. Priority Date: 09/30/2013
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Nagamine, Kazuhide, Hokyo, Tomoaki
• Primary Examiner(s): Wells, Kenneth B
• Application Number:
  US14/907,972
• Publication Number:
  US 20160190870A1
• Time in Patent Office: 1,357 Days
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/20 using microwaves or radio frequency waves
• CPC Class Codes: H02J 50/40 using two or more transmitting or receiving devices H02J50/50 takes precedence
• CPC Class Codes: H02J 50/402 the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas
• 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 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: H02J 7/0049 Detection of fully charged condition
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer

Abstract

A power transmitting apparatus transmits power by a first wireless power transmission method, transmits power by a second wireless power transmission method, detects a wireless power transmission method supported by a power receiving apparatus, and determines whether power is transmitted to a first power receiving apparatus by the first power transmission method or the second power transmission method, based on a detected wireless power transmission method supported by the first power receiving apparatus and a detected wireless power transmission method supported by a second power receiving apparatus.

Claims

1. A power transmitting apparatus comprising:

a first power transmitting unit configured to transmit power by a first wireless power transmission method;

a second power transmitting unit configured to transmit power by a second wireless power transmission method;

a detection unit configured to detect a wireless power transmission method supported by a power receiving apparatus; and

a determination unit configured to determine whether power is transmitted to a first power receiving apparatus by the first power transmitting unit or the second power transmitting unit, based on a wireless power transmission method supported by the first power receiving apparatus and detected by the detection unit, and a wireless power transmission method supported by a second power receiving apparatus and detected by the detection unit.

2. The apparatus according to claim 1, wherein when the first power transmitting unit is transmitting power to the first power receiving apparatus, the determination unit determines whether to switch power transmission to the first power receiving apparatus from power transmission by the first power transmitting unit to power transmission by the second power transmitting unit, based on the wireless power transmission method supported by the second power receiving apparatus and detected by the detection unit.

3. The apparatus according to claim 1, wherein a communicable distance of communication for controlling power transmission is different between the first wireless power transmission method and the second wireless power transmission method.

4. The apparatus according to claim 1, wherein an amount of power transmissible to a power receiving apparatus is different between the first wireless power transmission method and the second wireless power transmission method.

5. The apparatus according to claim 1, wherein the determination unit determines whether power is transmitted to each of the first power receiving apparatus and the second power receiving apparatus by the first power transmitting unit or the second power transmitting unit in accordance with whether an amount of power transmissible by the first power transmitting unit is exceeded when power is transmitted to the first power receiving apparatus and the second power receiving apparatus by the first power transmitting unit.

6. The apparatus according to claim 2, wherein the determination unit determines whether to switch power transmission to the first power receiving apparatus from power transmission by the first power transmitting unit to power transmission by the second power transmitting unit in accordance with whether the number of power receiving apparatuses to which it is possible to transmit power by the first wireless power transmission method is exceeded when power transmission to the second power receiving apparatus starts while power is transmitted to the first power receiving apparatus by the first power transmitting unit.

7. The apparatus according to claim 1, further comprising a communication unit configured to communicate with a power receiving apparatus,

wherein after the determination unit determines to change power transmission to the first power receiving apparatus from power transmission by the first power transmitting unit to power transmission by the second power transmitting unit,

if the communication unit receives control information about the second wireless power transmission method from the first power receiving apparatus,

the second power transmitting unit starts power transmission to the second power receiving apparatus.

8. The apparatus according to claim 1, further comprising a communication unit configured to communicate with a power receiving apparatus,

wherein if the determination unit determines to change power transmission to the first power receiving apparatus from power transmission by the first power transmitting unit to power transmission by the second power transmitting unit,

the second power transmitting unit starts power transmission to the second power receiving apparatus.

9. The apparatus according to claim 1, wherein when power transmission to the first power receiving apparatus is switched from power transmission by the first power transmitting unit to power transmission by the second power transmitting unit, and the first power transmitting unit is transmitting power to the second power receiving apparatus, if power transmission to the second power receiving apparatus is stopped, the power transmitting apparatus returns power transmission to the first power receiving apparatus from power transmission by the second power transmitting unit to power transmission by the first power transmitting unit.

10. The apparatus according to claim 1, wherein when the detection unit detects that the first power receiving apparatus supports the first wireless power transmission method and the second wireless power transmission method, and the first power transmitting unit is transmitting power to the first power receiving apparatus, if the detection unit detects that the second power receiving apparatus supports the first wireless power transmission method, the determination unit determines to change power transmission to the first power receiving apparatus from power transmission by the first power transmitting unit to power transmission by the second power transmitting unit, and determines to transmit power to the second power receiving apparatus by the first power transmitting unit.

11. A control method for a power transmitting apparatus, comprising:

transmitting power by a first wireless power transmission method;

transmitting power by a second wireless power transmission method;

detecting a wireless power transmission method supported by a power receiving apparatus; and

determining whether power is transmitted to a first power receiving apparatus by a first wireless power transmission method or a second wireless power transmission method, based on a wireless power transmission method supported by the first power receiving apparatus and detected in the detecting, and a wireless power transmission method supported by a second power receiving apparatus and detected in the detecting.

12. A first power receiving apparatus for receiving power wirelessly supplied from a power transmitting apparatus, comprising:

a detection unit configured to detect a wireless power transmission method supported by a second power receiving apparatus; and

an instruction unit configured to instruct, to the power transmitting apparatus, a wireless power transmission method to be used for power transmission to the first power receiving apparatus based on a wireless power transmission method supported by the first power receiving apparatus and the wireless power transmission method supported by the second power receiving apparatus and detected by the detection unit.

13. The apparatus according to claim 12, further comprising

a first power receiving unit configured to receive power by a first wireless power transmission method, and

a second power receiving unit configured to receive power by a second wireless power transmission method,

wherein when the first power receiving unit is receiving power from the power transmitting apparatus, the instruction unit instructs to change the wireless power transmission method used by the power transmitting apparatus for power transmission from the first wireless power transmission method to the second wireless power transmission method in accordance with the wireless power transmission method supported by the second power receiving apparatus.

14. The apparatus according to claim 13, wherein when the second power receiving apparatus supports not the first wireless power transmission method but the second wireless power transmission method, the instruction unit instructs to change the wireless power transmission method used by the power transmitting apparatus for power transmission from the first wireless power transmission method to the second wireless power transmission method.

15. The apparatus according to claim 13, wherein the instruction unit instructs the power transmitting apparatus to change the wireless power transmission method used for power transmission to the first power receiving apparatus in accordance with whether an amount of power transmissible by the power transmitting apparatus is exceeded when the power transmitting apparatus transmits power to the first power receiving apparatus and the second power receiving apparatus by the first wireless power transmission method.

16. The apparatus according to claim 13, wherein the instruction unit instructs the power transmitting apparatus to change the wireless power transmission method used for power transmission to the first power receiving apparatus in accordance with whether the number of power receiving apparatuses to which the power transmitting apparatus is capable of transmitting power by the first wireless power transmission method is exceeded when the power transmitting apparatus transmits power to the first power receiving apparatus and the second power receiving apparatus by the first wireless power transmission method.

17. The apparatus according to claim 13, wherein to change power reception to power reception by the second power receiving unit while the first power receiving unit receives power, the instruction unit instructs to change the wireless power transmission method used by the power transmitting apparatus for power transmission to the first power receiving apparatus from the first wireless power transmission method to the second wireless power transmission method by transmitting a signal for ending power transmission by the first wireless power transmission method to the power transmitting apparatus, and transmitting a signal for starting power transmission by the second wireless power transmission method to the power transmitting apparatus.

18. The apparatus according to claim 12, further comprising an input unit configured to input, by a user, a wireless power transmission method to be used by the power transmitting apparatus for power transmission.

19. The apparatus according to claim 13, wherein when the first power receiving apparatus supports the first wireless power transmission method and the second wireless power transmission method, and the first power receiving unit is receiving power, if the detection unit detects that the second power receiving apparatus supports the first wireless power transmission method, the instruction unit instructs the power transmitting apparatus to change power transmission to the first power receiving apparatus from the first wireless power transmission method to the second wireless power transmission method.

20. A control method for a first power receiving apparatus for receiving power wirelessly supplied from a power transmitting apparatus, comprising:

detecting a wireless power transmission method supported by a second power receiving apparatus; and

instructing, to the power transmitting apparatus, a wireless power transmission method to be used for power transmission to the first power receiving apparatus based on a wireless power transmission method supported by the first power receiving apparatus and the wireless power transmission method supported by the second power receiving apparatus and detected in the detecting.

21. A non-transitory computer-readable storage medium storing a program for causing a computer to execute a control method for a power transmitting apparatus, the control method comprising:

transmitting power by a first wireless power transmission method;

transmitting power by a second wireless power transmission method;

detecting a wireless power transmission method supported by a power receiving apparatus; and

determining whether power is transmitted to a first power receiving apparatus by a first wireless power transmission method or a second wireless power transmission method, based on a wireless power transmission method supported by the first power receiving apparatus and detected in the detecting, and a wireless power transmission method supported by a second power receiving apparatus and detected in the detecting.

22. A non-transitory computer-readable storage medium storing a program for causing a computer to execute a control method for a first power receiving apparatus for receiving power wirelessly supplied from a power transmitting apparatus, the control method comprising:

detecting a wireless power transmission method supported by a second power receiving apparatus; and

instructing, to the power transmitting apparatus, a wireless power transmission method to be used for power transmission to the first power receiving apparatus based on a wireless power transmission method supported by the first power receiving apparatus and the wireless power transmission method supported by the second power receiving apparatus and detected in the detecting.