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

• US 10,700,552 B2
• Filed: 05/06/2019
• Issued: 06/30/2020
• 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:
  US16/403,802
• Publication Number:
  US 20190260231A1
• Time in Patent Office: 421 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 for performing wireless power transmission to a power receiving apparatus, the power transmitting apparatus comprising:

one or more memories storing instructions; and

one or more processors executing the instructions to;

detect a power receiving apparatus;

identify one or more wireless power transmission methods that are usable by the detected power receiving apparatus;

determine, based on the identified one or more wireless power transmission methods, a wireless power transmission method to be used for wireless power transmission to the detected power receiving apparatus, from among a plurality of wireless power transmission methods including a first wireless power transmission method and a second wireless power transmission method;

perform negotiation with the detected power receiving apparatus to decide a parameter for transmitting power to the detected power receiving apparatus;

perform wireless power transmission to the detected power receiving apparatus, based on the parameter decided in the negotiation, according to the determined wireless power transmission method, and

perform communication with the detected power receiving apparatus by using a communication method for controlling the wireless power transmission according to the determined wireless power transmission method,

wherein a first communication method for controlling the wireless power transmission according to the first wireless power transmission method is different from a second communication method for controlling the wireless power transmission according to the second wireless power transmission method.

2. The power transmitting apparatus according to claim 1, wherein the one or more wireless power transmission methods that are usable by the detected power receiving apparatus is identified based on information received from the detected power receiving apparatus.

3. The power transmitting apparatus according to claim 1, wherein the one or more processors further execute the instructions to transmit inquiry signals according to the plurality of wireless power transmission methods, and the one or more wireless power transmission methods that are usable by the detected power receiving apparatus is identified based on a response signal to the inquiry signals.

4. The power transmitting apparatus according to claim 1, wherein the second wireless power transmission method has a transmissible maximum power that is larger than a transmissible maximum power of the first wireless power transmission method, and

wherein the determined wireless power transmission method is the second wireless power transmission method in a case where both of the first and second wireless power transmission methods are usable by the detected power receiving apparatus.

5. The power transmitting apparatus according to claim 1, wherein the determined wireless power transmission method is a wireless power transmission method by which it is possible to transmit power to a larger number of power receiving apparatuses in parallel, in a case where two or more wireless power transmission methods are usable by the detected power receiving apparatus.

6. The power transmitting apparatus according to claim 1, the one or more processors further execute the instructions to:

change a wireless power transmission method for power transmitting to the detected power receiving apparatus in accordance with one or more wireless power transmission methods that are usable by another power receiving apparatus that is detected while the wireless power transmission to the detected power receiving apparatus according to the determined wireless power transmission method is performed.

7. The power transmitting apparatus according to claim 1, wherein a frequency used in the first communication method is different from a frequency used in the second communication method.

8. The power transmitting apparatus according to claim 1, wherein a communicable distance of the first communication method is different from a communicable distance of the second communication method.

9. The power transmitting apparatus according to claim 1, wherein, in the negotiation, the power transmitting apparatus obtains information on requested power amount from the detected power receiving apparatus.

10. The power transmitting apparatus according to claim 1, wherein, the parameter comprises at least one of a current value and voltage value to be applied to a power transmitting antenna in the power transmitting apparatus.

11. The power transmitting apparatus according to claim 1, wherein the wireless power transmission methods to be used for wireless power transmission to the detected power receiving apparatus are determined before the negotiation with the detected power receiving apparatus is performed.

12. The power transmitting apparatus according to claim 11, wherein the negotiation is performed with the detected power receiving apparatus according to the determined wireless power transmission method.

13. A control method for controlling a power transmitting apparatus for performing wireless power transmission to a power receiving apparatus, the method comprising:

detecting a power receiving apparatus;

identifying one or more wireless power transmission methods that are usable by the detected power receiving apparatus;

determining, based on the identified one or more wireless power transmission methods, a wireless power transmission method to be used for wireless power transmission to the detected power receiving apparatus, from among a plurality of wireless power transmission methods, including a first wireless power transmission method and a second wireless power transmission method;

performing negotiation with the detected power receiving apparatus to decide a parameter for transmitting power to the detected power receiving apparatus;

performing wireless power transmission to the detected power receiving apparatus, based on the parameter decided in the negotiation, according to the determined wireless power transmission method, and

performing communication with the detected power receiving apparatus by using a communication method for controlling the wireless power transmission according to the determined wireless power transmission method,

wherein a first communication method for controlling the wireless power transmission according to the first wireless power transmission method is different from a second communication method for controlling the wireless power transmission according to the second wireless power transmission method.

14. The method according to claim 13, wherein a frequency used in the first communication method is different from a frequency used in the second communication method.

15. The method according to claim 13, wherein a communicable distance of the first communication method is different from a communicable distance of the second communication method.

16. A non-transitory computer-readable storage medium storing a program for causing a computer to execute a control method for controlling a power transmitting apparatus for performing wireless power transmission to a power receiving apparatus, the control method comprising:

detecting a power receiving apparatus;

identifying one or more wireless power transmission methods that are usable by the detected power receiving apparatus;

determining, based on the identified one or more wireless power transmission methods, a wireless power transmission method to be used for wireless power transmission to the detected power receiving apparatus, from among a plurality of wireless power transmission methods, including a first wireless power transmission method and a second wireless power transmission method;

performing negotiation with the detected power receiving apparatus to decide a parameter for transmitting power to the detected power receiving apparatus; and

performing wireless power transmission to the detected power receiving apparatus, based on the parameter decided in the negotiation, according to the determined wireless power transmission method, and

performing communication with the detected power receiving apparatus by using a communication method for controlling the wireless power transmission according to the determined wireless power transmission method,

wherein a first communication method for controlling the wireless power transmission according to the first wireless power transmission method is different from a second communication method for controlling the wireless power transmission according to the second wireless power transmission method.

17. The medium according to claim 16, wherein a frequency used in the first communication method is different from a frequency used in the second communication method.

18. The medium according to claim 16, wherein a communicable distance of the first communication method is different from a communicable distance of the second communication method.