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

• US 10,263,477 B2
• Filed: 09/22/2014
• Issued: 04/16/2019
• Est. Priority Date: 10/01/2013
• 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): Barnie, Rexford N
• Assistant Examiner(s): Willoughby, Terrence
• Application Number:
  US14/493,339
• Publication Number:
  US 20150091386A1
• Time in Patent Office: 1,667 Days
• Field of Search: 307104, 320108
• CPC Class Codes: H02J 50/10 using inductive coupling
• 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 transmitting apparatus supporting a plurality of wireless power transmission methods, acquires information about at least one wireless power transmission method supported by a power receiving apparatus from the power receiving apparatus, decides, based on the acquired information, a wireless power transmission method to be used for power transmission to the power receiving apparatus, and transmits power to the power receiving apparatus by the decided wireless power transmission method.

Claims

1. A power transmitting apparatus supporting a plurality of wireless power transmission methods, comprising:

a communicator for communicating with a power receiving apparatus;

at least one power transmission coil to be used for wireless power transmission to the power receiving apparatus;

a controller for;

(i) determining, based on information received from the power receiving apparatus, whether the power receiving apparatus supports a first wireless power transmission method in which a first value is defined as an upper limit value of a power transmission amount, the first value being higher than a second value that is defined as an upper limit value of a power transmission amount for a second wireless power transmission method;

(ii) deciding, based on a result of the determining, a wireless power transmission method to be used for wireless power transmission to the power receiving apparatus among a plurality of wireless power transmission methods including at least the first wireless power transmission method and the second wireless power transmission method, wherein the controller decides to transmit power to the power receiving apparatus according to the first wireless power transmission method if the controller determines that the power receiving apparatus supports both of the first and second wireless power transmission methods; and

(iii) performing negotiation, by using a communication protocol according to the decided wireless power transmission method, with the power receiving apparatus to determine parameters for the wireless power transmission according to the decided wireless power transmission method; and

a power transmitter for, by using the at least one power transmission coil, performing the wireless power transmission to the power receiving apparatus according to the wireless power transmission method decided by said controller, wherein the wireless power transmission according to the first wireless power transmission method and the wireless power transmission according to the second wireless power transmission method are performed by a same power transmission coil.

2. The apparatus according to claim 1, wherein the wireless power transmission by the first wireless power transmission method is controlled by a first communication protocol, and the wireless power transmission by the second wireless power transmission method is controlled by a second communication protocol whose communicable distance is longer than that of the first communication protocol.

3. The apparatus according to claim 1, wherein said controller decides to transmit power to the power receiving apparatus by the second wireless power transmission method by which a larger amount of power is transmissible than the first wireless power transmission method in a case where the communicator receives information identifying both of the first and second wireless power transmission methods as the wireless power transmission methods that are supported by the power receiving apparatus.

4. The apparatus according to claim 1, wherein said communicator further receives second information for identifying a wireless power transmission method supported by another power receiving apparatus other than the power receiving apparatus,

wherein said controller decides, based on both of the information and the second information received by said communicator, a wireless power transmission method to be used for power transmission to the power receiving apparatus.

5. The apparatus according to claim 1, wherein said controller decides, based on history information about a wireless power transmission method used for power transmission to the power receiving apparatus in the past, a wireless power transmission method to be used for power transmission to the power receiving apparatus.

6. The apparatus according to claim 1, further comprising a detector for detecting a position of the power receiving apparatus existing within a power transmission range of said power transmitting unit,

wherein based on the position of the power receiving apparatus detected by said detector, said controller decides a wireless power transmission method to be used for power transmission to the power receiving apparatus.

7. The apparatus according to claim 1, wherein based on both of (i) a wireless power transmission method already used for power transmission to another power receiving apparatus and (ii) the one or more wireless power transmission methods identified by the information received by said communicator, said controller decides a wireless power transmission method to be used for power transmission to the power receiving apparatus.

8. The apparatus according to claim 1, wherein based on both of (i) power transmission efficiency and (ii) the one or more wireless power transmission methods identified by the information received by said communicator, said controller decides a wireless power transmission method to be used for power transmission to the power receiving apparatus.

9. The apparatus according to claim 1, wherein based on both of (i) designation of a user and (ii) the one or more wireless power transmission methods identified by the information received by said communicator, said controller decides a wireless power transmission method to be used for power transmission to the power receiving apparatus.

10. The apparatus according to claim 1, wherein after said power transmitter ends the wireless power transmission to the power receiving apparatus, processes by said communicator, said controller, and said power transmitter are executed for a second power receiving apparatus different from the power receiving apparatus.

13. The apparatus according to claim 1, wherein said power transmitter comprises a first antenna for wireless power transmission by the first wireless power transmission method and a second antenna for wireless power transmission by the second wireless power transmission method.

14. The apparatus according to claim 1, wherein a format of a message sent by the controller to the power receiving apparatus for negotiation of the first power transmission method is different from a format of a message sent by the controller to the power receiving apparatus for negotiation of the second power transmission method.

15. The apparatus according to claim 1, wherein the controller performs negotiation with the power receiving apparatus for determining parameters for wireless power transmission, by using a communication protocol according to the decided power transmission method.

16. The apparatus according to claim 1, wherein the communicator transmits, to the power receiving apparatus, a first inquiry message according to the first communication protocol and a second inquiry message according to the second communication protocol, and the communicator receives a response to at least one of the first and second inquiry messages as information used for determining whether the power receiving apparatus supports each of the first and second wireless power transmission methods.

17. The apparatus according to claim 1, wherein the controller decides to transmit power to the power receiving apparatus by the second wireless power transmission method in a case where the controller determines, based on the information received from the power receiving apparatus, that the power receiving apparatus does not support the first wireless power transmission method and does support the second wireless power transmission method.

11. A control method for a power transmitting apparatus which comprises at least one power transmission coil to be used for wireless power transmission to a power receiving apparatus and which supports a plurality of wireless power transmission methods, the control method comprising:

receiving information from the power receiving apparatus;

determining, based on information received from the power receiving apparatus, whether the power receiving apparatus supports a first wireless power transmission method in which a first value is defined as an upper limit value of a power transmission amount, the first value being higher than a second value that is defined as an upper limit value of a power transmission amount for a second wireless power transmission method;

deciding, based on a result of the determining a wireless power transmission method to be used for wireless power transmission to the power receiving apparatus among a plurality of wireless power transmission methods including at least the first wireless power transmission method and the second wireless power transmission method, wherein it is decided to transmit power to the power receiving apparatus according to the first wireless power transmission method if it is determined that the power receiving apparatus supports both of the first and second wireless power transmission methods;

performing negotiation, by using a communication protocol according to the decided wireless power transmission method, with the power receiving apparatus to determine parameters for the wireless power transmission according to the decided wireless power transmission method; and

transmitting power wirelessly, by using the at least one power transmission coil, to the power receiving apparatus according to the decided wireless power transmission method, wherein the wireless power transmission according to the first wireless power transmission method and the wireless power transmission according to the second wireless power transmission method are performed by a same power transmission coil.

12. A non-transitory computer-readable storage medium storing a computer program for controlling a computer to execute a control method for a power transmitting apparatus which comprises at least one power transmission coil to be used for wireless power transmission to a power receiving apparatus and which supports a plurality of wireless power transmission methods, the program comprising code for executing:

receiving information from the power receiving apparatus;

determining, based on information received from the power receiving apparatus, whether the power receiving apparatus supports a first wireless power transmission method in which a first value is defined as an upper limit value of a power transmission amount, the first value being higher than a second value that is defined as an upper limit value of a power transmission amount for a second wireless power transmission method;

deciding, based on a result of the determining, a wireless power transmission method to be used for wireless power transmission to the power receiving apparatus among a plurality of wireless power transmission methods including at least the first wireless power transmission method and the second wireless power transmission method, wherein it is decided to transmit power to the power receiving apparatus according to the first wireless power transmission method if it is determined that the power receiving apparatus supports both of the first and second wireless power transmission methods;

performing negotiation, by using a communication protocol according to the decided wireless power transmission method, with the power receiving apparatus to determine parameters for the wireless power transmission according to the decided wireless power transmission method; and

transmitting power wirelessly, by using the at least one power transmission coil, to the power receiving apparatus according to the decided wireless power transmission method, wherein the wireless power transmission according to the first wireless power transmission method and the wireless power transmission according to the second wireless power transmission method are performed by a same power transmission coil.