Method and apparatus for controlling wireless charging during mode transition of a wireless power receiving device

• US 10,804,746 B2
• Filed: 03/31/2020
• Issued: 10/13/2020
• Est. Priority Date: 05/03/2013
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Lee, Kyung-Woo, Byun, Kang-Ho, Lee, Ho-Seong, Jung, Hee-Won
• Primary Examiner(s): Tso, Edward
• Application Number:
  US16/836,375
• Publication Number:
  US 20200227947A1
• Time in Patent Office: 196 Days
• Field of Search: 320107, 320108, 320114, 320115, 307104
• CPC Class Codes: H01M 10/4257 Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/60 responsive to the presence of foreign objects, e.g. detection of living beings
• 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 5/24 Inductive coupling
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

Methods and apparatuses for performing wireless charging are disclosed. A method of controlling a wireless power receiver includes receiving, through a power receiving circuit, a first power from a wireless power transmitter when the wireless power receiver is powered off; driving a communication controller using the received first power; establishing, by the communication controller, a communication connection with the wireless power transmitter, using a first communication stack stored in a first memory, while receiving the first power; and performing, by the communication controller, communication with the wireless power transmitter.

Claims

1. A method of a wireless power receiver, the method comprising:

receiving, through a power receiving circuit of the wireless power receiver, power from a wireless power transmitter;

establishing, by a communication unit of the wireless power receiver, a first communication connection in a first mode of the communication unit with the wireless power transmitter;

sending, over the established first communication connection by the communication unit of the wireless power receiver, information regarding a mode transition of the communication unit of the wireless power receiver to the wireless power transmitter;

performing the mode transition from the first mode of the communication unit to a second mode of the communication unit while receiving power from the wireless power transmitter; and

establishing, by the communication unit of the wireless power receiver, a second communication connection in the second mode of the communication unit with the wireless power transmitter.

2. The method of claim 1, wherein the communication unit of the wireless power receiver performs the first communication connection with the wireless power transmitter using a first communication scheme stored in the communication unit in the first mode, and performs the second communication connection with the wireless power transmitter using a second communication scheme received from an application processor of the wireless power receiver in the second mode.

3. The method of claim 1, wherein the information is transmitted through a Power Reception Unit (PRU) alert signal.

4. The method of claim 3, wherein the mode transition is indicated in a data field of the PRU alert signal.

5. The method of claim 1, wherein the information comprises address information for resuming the communication with the wireless power transmitter.

6. A method of a wireless power transmitter, the method comprising:

transmitting, through a power transmitting circuit, a first power for initiating a communication unit of a wireless power receiver;

establishing a first communication connection in a first mode of the communication unit with the wireless power receiver while transmitting the first power;

performing communication with the wireless power receiver;

transmitting a second power for charging of the wireless power receiver;

receiving, from the wireless power receiver, information regarding a mode transition of the communication unit of the wireless power receiver;

terminating the first communication connection with the wireless power receiver;

in response to receiving the information, maintaining a power transmission of the second power to the wireless power receiver for a time period; and

after the mode transition from the first mode of the communication unit to a second mode of the communication unit, establishing a second communication connection in the second mode of the communication unit with the wireless power receiver.

7. The method of claim 6, wherein the communication unit of the wireless power receiver performs the first communication connection with the wireless power transmitter using a first communication scheme stored in the communication unit of the wireless power receiver in the first mode, and performs the second communication connection with the wireless power transmitter using a second communication scheme received from an application processor of the wireless power receiver in the second mode.

8. The method of claim 6, wherein the message is received through a Power Reception Unit (PRU) alert signal.

9. The method of claim 8, wherein the mode transition is indicated in a data field of the PRU alert signal.

10. The method of claim 6, wherein the information comprises address information for resuming the communication with the wireless power receiver.

11. A wireless power receiver for wireless charging, the wireless power receiver comprising:

a power receiving circuit configured to receive, from a wireless power transmitter, power; and

a communication unit configured to;

establish a first communication connection in a first mode of the communication unit with the wireless power transmitter;

control to send, over the established first communication connection by the communication unit of the wireless power receiver, information regarding a mode transition of the communication unit of the wireless power receiver to the wireless power transmitter;

perform the mode transition from the first mode of the communication unit to a second mode of the communication unit while receiving power from the wireless power transmitter; and

establish a second communication connection in the second mode of the communication unit with the wireless power transmitter.

12. The wireless power receiver of claim 11, wherein the communication unit is further configured to:

perform the first communication connection with the wireless power transmitter using a first communication scheme stored in the communication unit in the first mode, and

perform the second communication connection with the wireless power transmitter using a second communication scheme received from an application processor of the wireless power receiver in the second mode.

13. The wireless power receiver of claim 11, wherein the information is transmitted through a Power Reception Unit (PRU) alert signal.

14. The wireless power receiver of claim 13, wherein the mode transition is indicated in a data field of the PRU alert signal.

15. The wireless power receiver of claim 13, wherein the information comprises address information for resuming the communication with the wireless power transmitter.

16. A wireless power transmitter for wireless charging, the wireless power transmitter comprising:

a power transmitting circuit configured to transmit a first power for initiating a communication unit of a wireless power receiver; and

a communication unit configured to;

establish a first communication connection in a first mode of the communication unit with the wireless power receiver while transmitting the first power,

perform communication with the wireless power receiver,

control to transmit a second power for charging of the wireless power receiver

receive, from the wireless power receiver, information regarding a mode transition of the communication unit of the wireless power receiver,

terminate the first communication connection with the wireless power receiver,

in response to receiving the information, control to maintain a power transmission of the second power to the wireless power receiver for a time period, and

after the mode transition from the first mode of the communication unit to a second mode of the communication unit, establish a second communication connection in the second mode of the communication unit with the wireless power receiver.

17. The wireless power transmitter of claim 16, wherein the communication unit of the wireless power receiver performs the first communication connection with the wireless power transmitter using a first communication scheme stored in the communication unit of the wireless power receiver in the first mode, and performs the second communication connection with the wireless power transmitter using a second communication scheme received from an application processor of the wireless power receiver in the second mode.

18. The wireless power transmitter of claim 16, wherein the message is received through a Power Reception Unit (PRU) alert signal.

19. The wireless power transmitter of claim 18, wherein the mode transition is indicated in a data field of the PRU alert signal.

20. The wireless power transmitter of claim 16, wherein the information comprises address information for resuming the communication with the wireless power receiver.