Power receiving apparatus for wirelessly receiving power from external apparatus

• US 10,306,558 B2
• Filed: 10/19/2016
• Issued: 05/28/2019
• Est. Priority Date: 10/22/2015
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Kaechi, Shuya
• Primary Examiner(s): Vu, Hoang-Chuong Q
• Application Number:
  US15/297,992
• Publication Number:
  US 20170118714A1
• Time in Patent Office: 951 Days
• CPC Class Codes: H04B 5/263 Multiple coils at either side
• CPC Class Codes: H04B 5/72 for local intradevice communication
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer
• CPC Class Codes: H04W 4/80 Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
• CPC Class Codes: H04W 52/0235 where the received signal is a power saving command

Abstract

A power receiving apparatus includes a first antenna, a second antenna, and a control unit that executes control to exclusively and alternately execute power reception processing of wirelessly obtaining power from a power transmission apparatus via the first antenna and communication processing of wirelessly communicating with the power transmission apparatus via the second antenna, where, during execution of the communication processing, the control unit executes control to set a resonance frequency of the first antenna to be a frequency lower than a carrier frequency band of the second antenna for the execution of the communication processing.

Claims

1. A power receiving apparatus comprising:

a first antenna;

a second antenna; and

a control unit configured to execute control to exclusively and alternately execute power reception processing of wirelessly obtaining power from a power transmission apparatus via the first antenna and communication processing of wirelessly communicating with the power transmission apparatus via the second antenna, wherein power is wirelessly received by receiving a signal of a predetermined frequency via the first antenna in the power reception processing, and wireless communication is performed by receiving the signal of the predetermined frequency via the second antenna in the communication processing,

wherein during execution of the communication processing, the control unit executes control to set a resonance frequency of the second antenna to be the predetermined frequency and a resonance frequency of the first antenna to be a frequency other than the predetermined frequency and frequencies of an integral multiple of the predetermined frequency, so that the first antenna does not resonate with the signal of the predetermined frequency,

wherein during execution of the power reception processing, the control unit executes control to set the resonance frequency of the first antenna to be the predetermined frequency and the resonance frequency of the second antenna to be a frequency other than the predetermined frequency and frequencies of an integral multiple of the predetermined frequency, so that the second antenna does not resonate with the signal of the predetermined frequency, and

wherein in a case where execution of the communication processing is changed to execution of the power reception processing, the control unit executes control to first set the resonance frequency of the second antenna to be the predetermined frequency and then to set the resonance frequency of the first antenna to be a frequency other than the predetermined frequency and frequencies of an integral multiple of the predetermined frequency, so that the first antenna does not resonate with the signal of the predetermined frequency.

2. The power receiving apparatus according to claim 1,

wherein during execution of the communication processing, after setting a resonance frequency of the second antenna to be the predetermined frequency, the control unit executes control to set a resonance frequency of the first antenna to be a frequency lower than the predetermined frequency.

3. The power receiving apparatus according to claim 1,

wherein during execution of the power reception processing, the control unit executes control to set a resonance frequency of the second antenna to be a frequency lower than the predetermined frequency.

4. The power receiving apparatus according to claim 1,

wherein during execution of the power reception processing, after setting a resonance frequency of the first antenna to be the predetermined frequency, the control unit executes control to set a resonance frequency of the second antenna to be a frequency lower than the predetermined frequency.

5. The power receiving apparatus according to claim 1,

wherein a predetermined period is provided between the power reception processing and the communication processing, and

in the predetermined period, neither communication nor power reception is conducted.

6. The power receiving apparatus according to claim 5,

wherein a time of the predetermined period is determined based on data communicated with the power transmission apparatus in the communication processing.

7. The power receiving apparatus according to claim 1,

wherein a predetermined period is provided between the power reception processing and the communication processing, and

wherein in the predetermined period, the control unit executes control to set both a resonance frequency of the first antenna and a resonance frequency of the second antenna, to be a frequency lower than (i) any of a carrier frequency band of the first antenna for the execution of the power reception processing or (ii) carrier frequency band of the second antenna for the execution of the communication processing.

8. The power receiving apparatus according to claim 1,

wherein, in the communication processing, information related to power received in the power reception processing is received.

9. A method of controlling a power receiving apparatus including a first antenna and a second antenna, comprising:

the control step of exclusively and alternately executing power reception processing of wirelessly obtaining power from a power transmission apparatus via the first antenna and communication processing of wirelessly communicating with the power transmission apparatus via the second antenna,

wherein power is wirelessly received by receiving a signal of a predetermined frequency via the first antenna in the power reception processing, and wireless communication is performed by receiving the signal of the predetermined frequency via the second antenna in the communication processing,

wherein during execution of the communication processing, a resonance frequency of the second antenna is set to be the predetermined frequency and a resonance frequency of the first antenna to be a frequency other than the predetermined frequency and frequencies of an integral multiple of the predetermined frequency, so that the first antenna does not resonate with the signal of the predetermined frequency,

wherein during execution of the power reception processing, the control unit executes control to set the resonance frequency of the first antenna to be the predetermined frequency and the resonance frequency of the second antenna to be a frequency other than the predetermined frequency and frequencies of an integral multiple of the predetermined frequency, so that the second antenna does not resonate with the signal of the predetermined frequency, and

wherein in a case where execution of the communication processing is changed to execution of the power reception processing, the control unit executes control first to set the resonance frequency of the second antenna to be the predetermined frequency and then to set the resonance frequency of the first antenna to be a frequency other than the predetermined frequency and frequencies of an integral multiple of the predetermined frequency, so that the first antenna does not resonate with the signal of the predetermined frequency.

10. A non-transitory recording medium storing computer executable instructions which, when executed, cause a power receiving apparatus including a first antenna and a second antenna, to execute a control method, the control method comprising:

the control step of exclusively and alternately executing power reception processing of wirelessly obtaining power from a power transmission apparatus via the first antenna and communication processing of wirelessly communicating with the power transmission apparatus via the second antenna,

wherein power is wirelessly received by receiving a signal of a predetermined frequency via the first antenna in the power reception processing, and wireless communication is performed by receiving the signal of the predetermined frequency via the second antenna in the communication processing,

wherein during execution of the communication processing, a resonance frequency of the second antenna is set to be the predetermined frequency and a resonance frequency of the first antenna to be a frequency other than the predetermined frequency and frequencies of an integral multiple of the predetermined frequency, so that the first antenna does not resonate with the signal of the predetermined frequency,

wherein during execution of the power reception processing, the control unit executes control to set the resonance frequency of the first antenna to be the predetermined frequency and the resonance frequency of the second antenna to be a frequency other than the predetermined frequency and frequencies of an integral multiple of the predetermined frequency, so that the second antenna does not resonate with the signal of the predetermined frequency, and

wherein in a case where execution of the communication processing is changed to execution of the power reception processing, the control unit executes control first to set the resonance frequency of the second antenna to be the predetermined frequency and then to set the resonance frequency of the first antenna to be a frequency other than the predetermined frequency and frequencies of an integral multiple of the predetermined frequency, so that the first antenna does not resonate with the signal of the predetermined frequency.