Wireless communication system and method for transitioning between wireless communication and wireless power transfer

• US 9,444,521 B2
• Filed: 02/23/2015
• Issued: 09/13/2016
• Est. Priority Date: 04/04/2008
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Hamada, Masashi
• Primary Examiner(s): Safaipour, Bobbak
• Assistant Examiner(s): SANDIFORD, DEVAN A
• Application Number:
  US14/629,220
• Publication Number:
  US 20150171933A1
• Time in Patent Office: 568 Days
• US Class Current: 1/1
• 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 7/00034 Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge
• CPC Class Codes: H04B 5/00 Near-field transmission systems, e.g. inductive or capacitive transmission systems
• CPC Class Codes: H04B 5/24 Inductive coupling
• CPC Class Codes: H04B 5/26 using coils
• CPC Class Codes: H04B 5/72 for local intradevice communication
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer

Abstract

The object of the invention is to achieve stable operation of a communication device, which includes an information transmission means and a power transmission means while maintaining communication quality. A mobile device of the invention has an information transmission means for executing non-contact transmission, a power transmission means, a first control means for controlling the information transmission means to repeat an active period and a sleep period, and a second control means for controlling the power transmission means to transmit a power during the sleep period.

Claims

1. A power transmission apparatus comprising:

a communication controller configured to communicate wirelessly with a power reception apparatus, during a period capable of data transfer, a duration of power transmission to be performed during a period of no data transfer; and

a power transmission controller configured to, after the period capable of data transfer, transmit power wirelessly to the power reception apparatus during the period of no data transfer in accordance with the duration communicated by the communication controller.

2. The power transmission apparatus according to claim 1, wherein the communication controller starts to communicate the duration and the power transmission controller starts to transmit power in a case where the power transmission apparatus approaches the power receiving apparatus.

3. The power transmission apparatus according to claim 1, wherein the communication controller transmits the duration information to the power reception apparatus.

4. The power transmission apparatus according to claim 1, wherein the communication controller receives the information from the power reception apparatus.

5. The power transmission apparatus according to claim 1, wherein the power transmission apparatus does not transmit power in a case where the communication controller receives from the power reception apparatus a notification indicating that power reception is not required.

6. The power transmission apparatus according to claim 1, further comprising:

a coil; and

a switch that causes the coil to connect exclusively with the communication controller or the power transmission controller,

wherein the switch causes the coil, based on the duration communicated by the communication controller, to connect with the communication controller during the period capable of data transfer, and to connect to the power transmission controller during the period of no data transfer.

7. The power transmission apparatus according to claim 1, wherein the communication controller communicates wirelessly with Near Field Communication (NFC).

8. The power transmission apparatus according to claim 1, wherein the communication controller communicates with the power reception apparatus during a period capable of data transfer in a wireless transmission cycle, and the power transmission controller transmits power to the power reception apparatus during the period of no data transfer in the wireless transmission cycle.

9. A power reception apparatus comprising:

a communication controller configured to communicate wirelessly with a power transmission apparatus, during a period capable of data transfer, a duration of power transmission to be performed during a period of no data transfer; and

a power reception controller configured to, after the period capable of data transfer, receive power wirelessly from the power transmission apparatus during the period of no data transfer in accordance with the duration communicated by the communication controller.

10. The power reception apparatus according to claim 9, wherein the communication controller starts to communicate the duration and the power reception controller starts to receive power in a case where the power transmission apparatus approaches the power receiving apparatus.

11. The power reception apparatus according to claim 9, wherein the communication controller transmits the duration to the power transmission apparatus.

12. The power reception apparatus according to claim 9, wherein the communication controller receives the duration from the power transmission apparatus.

13. The power reception apparatus according to claim 9, wherein the communication controller transmits a notification indicating the power reception is not required if the power reception apparatus is in a state where power reception is not required.

14. The power reception apparatus according to claim 9:

wherein the power reception apparatus determines whether the power reception apparatus is in a state where power reception is required or not based on at least one of charging condition of a battery, a power of battery, and a temperature of a battery.

15. The power reception apparatus according to claim 9, further comprising:

a coil; and

a switch that causes the coil to connect exclusively with the communication controller or the power reception controller,

wherein the switch causes the coil to connect with the communication controller during the period capable of data transfer, and causes the coil to connect to the power reception controller during the period of no data transfer.

16. The power reception apparatus according to claim 9, wherein the communication controller communicates wirelessly with Near Field Communication (NFC).

17. A control method for a power transmission apparatus comprising:

a communication step of communicating wirelessly with a power reception apparatus, during a period capable of data transfer, a duration of power transmission to be performed during a period of no data transfer; and

a power transmission step for, after the period capable of data transfer, transmitting power wirelessly to the power reception apparatus during the period of no data transfer in accordance with the duration communicated in the communication step.

18. A non-transitory computer-readable storage medium for storing a program which causes a computer to execute a control method, the method comprising:

a communication step of communicating wirelessly with a power reception apparatus, during a period capable of data transfer, a duration of power transmission to be performed during a period of no data transfer; and

a power transmission step for, after the period capable of data transfer, transmitting power wirelessly to the power reception apparatus during the period of no data transfer in accordance with the duration communicated in the communication step.

19. A control method for a power reception apparatus comprising:

a communication step for communicating wirelessly with a power transmission apparatus, during a period capable of data transfer, a duration of power transmission to be performed during a period of no data transfer; and

a power reception step for, after the period capable of data transfer, receiving power wirelessly from the power transmission apparatus during the period of no data transfer in accordance with the duration communicated in the communication step.

20. A computer-readable storage medium for storing a program which causes a computer to execute a control method, the method comprising:

a communication step for communicating wirelessly with a power transmission apparatus, during a period capable of data transfer, a duration of power transmission to be performed during a period of no data transfer; and

a power reception step for, after the period capable of data transfer, receiving power wirelessly from the power transmission apparatus during the period of no data transfer in accordance with the duration communicated in the communication step.