POWER TRANSMITTER, POWER RECEIVER AND POWER TRANSMISSION AND RECEPTION SYSTEM

• US 20130324038A1
• Filed: 02/28/2013
• Published: 12/05/2013
• Est. Priority Date: 06/01/2012
• Status: Active Grant

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: KAJIHARA, Hirotsugu, HORIGUCHI, Tomoya, SETO, Ichiro, MIYASAKA, Toshiki, TOSHIMITSU, Kiyoshi, KUMAKI, Yoshinari
• Granted Patent: US 9,094,051 B2
• Time in Patent Office: Days
• US Class Current: 455/41.1
• CPC Class Codes: H04B 5/0031 for data transfer
• CPC Class Codes: H04B 5/0037 for power transfer
• CPC Class Codes: H04B 5/0075 using inductive coupling transformers or inductances adapted for inductive coupling H01F38/14
• CPC Class Codes: H04B 5/24 Inductive coupling
• 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

According to one embodiment, a power transmission and reception system includes a power transmitter and a power receiver. The power transmitter includes a power transmission module configured to wireless-transmit power to the power receiver; and a first wireless communication module configured to perform wireless communication of data frame having data with the power receiver. The power receiver includes a power reception module configured to receive the power transmitted from the power transmission module; and a second wireless communication module configured to perform wireless communication of the data frame with the first wireless communication module using the received power. The second wireless communication module is configured to perform wireless communication while the power reception module is not receiving the power.

Claims

1. A power transmission and reception system comprising a power transmitter and a power receiver, wherein

power transmitter comprises:

a power transmission module configured to wireless-transmit power to the power receiver; and

a first wireless communication module configured to perform wireless communication of data frame comprising data with the power receiver;

the power receiver comprises;

a power reception module configured to receive the power transmitted from the power transmission module; and

a second wireless communication module configured to perform wireless communication of the data frame with the first wireless communication module using the received power; and

wherein the second wireless communication module is configured to perform wireless communication while the power reception module is not receiving the power.

2. The system of claim 1, wherein the power reception module comprises:

a coil configured to receive an electric wave configured to transmit the power;

a power reception controller configured to convert the electric wave to a current; and

a charge keeping module configured to keep charges by the current; and

the power receiver further comprises;

a charge monitor configured to monitor an amount of charges kept in the charge keeping module; and

a controller configured to stop a power transmission and start the wireless communication by the second wireless communication module when the amount of charges kept in the charge keeping module becomes over a first threshold.

3. The system of claim 2, wherein the controller is configured to stop the power transmission from the power transmitter by changing a load resistance of the coil when the amount of charges kept in the charge keeping module becomes over the first threshold.

4. The system of claim 2, wherein the controller is configured to stop the wireless communication by the second wireless communication module and restart the power transmission from the power transmitter when the amount of charges kept in the charge keeping module becomes below a second threshold.

5. The system of claim 2, wherein the power receiver further comprises a memory accessed by the controller, data being written in and read from the memory,

the controller is configured to access the memory while the second wireless communication module performs the wireless communication.

6. The system of claim 2, wherein the power receiver further comprises a memory accessed by the controller, data being written in and read from the memory,

the controller is configured to access the memory while the power reception module is receiving the power.

8. The system of claim 2, wherein the power receiver further comprises a memory accessed by the controller, data being written in and read out from the memory,

the controller is configured to access the memory while the power reception module is not receiving the power and the second wireless communication module is not performing the wireless communication.

9. The system of claim 2, wherein the charge keeping module comprises a battery capable of charge up the power received by the power reception module.

10. The system of claim 1, wherein the second wireless communication module is configured to perform the wireless communication of a controller frame comprising a control signal with the power transmitter, and

interference tolerance of the control frame is larger than interference tolerance of data frame.

11. The system of claim 1, wherein a frequency of an electric wave that transmits the power is 13.56 MHz.

7. The system of claim 7, wherein the second wireless communication module comprises a buffer, the data being written in and read from the buffer, and the second wireless communication module is configured to read the data from the buffer and/or write the data in the buffer during performing the wireless communication,

the controller is configured to read the data written in the memory and write the read data in the buffer and/or to read the data written in the buffer and write the read data in the memory while the power reception module is receiving the power.

12. A power receiver configured to perform wireless communication with a power transmitter, the power transmitter comprising a power transmission module configured to wireless-transmit power, and a first wireless communication module configured to perform wireless communication of data frame comprising data, the power receiver comprising:

a power reception module configured to receive the power transmitted from the power transmission module; and

a second wireless communication module configured to perform wireless communication of the data frame with the first wireless communication module using the received power;

wherein the second wireless communication module is configured to perform wireless communication while the power reception module is not receiving the power.

13. The receiver of claim 12, wherein the power reception module comprises:

a coil configured to receive an electric wave configured to transmit the power;

a power reception controller configured to convert the electric wave to a current; and

a charge keeping module configured to keep charges by the current; and

the power receiver further comprises;

a charge monitor configured to monitor an amount of charges kept in the charge keeping module; and

a controller configured to stop a power transmission and start the wireless communication by the second wireless communication module when the amount of charges kept in the charge keeping module becomes over a first threshold.

14. The receiver of claim 13, wherein the controller is configured to stop the power transmission from the power transmitter by changing a load resistance of the coil when the amount of charges kept in the charge keeping module becomes over the first threshold.

15. The receiver of claim 13, wherein the controller is configured to stop the wireless communication by the second wireless communication module and restart the power transmission from the power transmitter when the amount of charges kept in the charge keeping module becomes below a second threshold.

16. The receiver of claim 13 further comprising a memory accessed by the controller, data being written in and read from the memory,

wherein the controller is configured to access the memory while the second wireless communication module is performing the wireless communication.

17. The receiver of claim 13 further comprising a memory accessed by the controller, data being written in and read from the memory,

wherein the controller is configured to access the memory while the power reception module is receiving the power.

18. The receiver of claim 17, wherein the second wireless communication module comprises a buffer, the data being written in and read from the buffer, and the second wireless communication module is configured to read the data from the buffer and/or write the data in the buffer during performing the wireless communication,

the controller is configured to read the data written in the memory and write the read data in the buffer and/or to read the data written in the buffer and write the read data in the memory while the power reception module is receiving the power.

19. The receiver of claim 13 further comprising a memory accessed by the controller, data being written in and read out from the memory,

wherein the controller is configured to access the memory while the power reception module is not receiving the power and the second wireless communication module is not performing the wireless communication.

20. A power transmitter configured to perform wireless communication with a power receiver, the power receiver comprising a power reception module configured to wireless-receive power, and a second wireless communication module configured to perform wireless communication of data frame comprising data using the received power, the power transmitter comprising:

a power transmission module configured to wireless-transmit power to the power reception module; and

a first wireless communication module configured to perform wireless communication of the data frame with the power receiver;

wherein the first wireless communication module is configured to perform wireless communication while the power transmission module is not transmitting the power.