Wireless power transfer and receive method, apparatus and system

• US 10,193,398 B2
• Filed: 02/06/2015
• Issued: 01/29/2019
• Est. Priority Date: 02/07/2014
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Park, Yongcheol, Lee, Hyunbeom
• Primary Examiner(s): Chen, Sibin
• Application Number:
  US15/109,098
• Publication Number:
  US 20160329755A1
• Time in Patent Office: 1,453 Days
• 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: H02J 7/00308 Overvoltage protection

Abstract

The present disclosure relates to a wireless power transmission and reception method, a wireless power transmission and reception apparatus, and a wireless charging system in a wireless power transmission and reception field, and the method may include sensing whether or not there exists a wireless power receiver within a range capable of transmitting power in a wireless manner, sending a detection signal to the wireless power receiver, allowing the wireless power receiver to receive at least one of an identification packet and a setting packet transmitted in a first mode, determining whether or not to perform communication in either one of the first mode and a second mode different from the first mode based on the setting packet, and transmitting power to the wireless power receiver while performing communication in the determined either one mode, wherein the setting packet comprises an operation mode indicating a communication execution mode of the wireless power receiver.

Claims

1. A wireless power transmitter for transferring power to a wireless power receiver in a wireless manner, the wireless power transmitter comprising:

a power transmission control unit configured to detect the wireless power receiver; and

a power conversion unit configured to transfer the power to the wireless power receiver;

wherein the wireless power transmitter is configured to;

receive at least one of an identification packet or a configuration packet transmitted in a first mode from the wireless power receiver;

determine, based on the configuration packet, whether or not the wireless power receiver supports a second mode different from the first mode; and

communicate with the wireless power receiver in at least one of the first mode or the second mode when the wireless power receiver supports the second mode,

wherein the first mode is used for communication between one wireless power transmitter and one wireless power receiver, and the second mode is used for communication between one wireless power transmitter and a plurality of wireless power receivers, and

wherein the configuration packet comprises operation mode information indicating a communication execution mode supported by the wireless power receiver.

2. The wireless power transmitter of claim 1, wherein the wireless power transmitter is further configured to:

perform communication with the wireless power receiver according to the first mode while the power is transferred when the operation mode information indicates the first mode; and

perform communication with the wireless power receiver according to the second mode while the power is transferred when the operation mode information indicates the second mode.

3. The wireless power transmitter of claim 2, wherein when the operation mode information indicates the second mode, the wireless power transmitter is further configured to:

transmit a first sync signal linked to a first slot among a plurality of slots;

receive control information from the wireless power receiver within the first slot in response to the first sync signal; and

determine whether or not to allocate the first slot to the wireless power receiver.

4. The wireless power transmitter of claim 3, wherein when the first slot is not allocated to the wireless power receiver, the wireless power transmitter is further configured to:

transmit a second sync signal linked to a second slot different from the first slot among the plurality of slots;

receive control information from the wireless power receiver within the second slot in response to the second sync signal; and

determine whether or not to allocate the second slot to the wireless power receiver.

5. The wireless power transmitter of claim 3, wherein the first sync signal and the second sync signal have a pattern or packet form.

6. The wireless power transmitter of claim 3, wherein the operation mode information is transmitted to the wireless power receiver through the first slot.

7. The wireless power transmitter of claim 1, wherein the wireless power transmitter is further configured to:

transmit a configuration packet of the wireless power transmitter to the wireless power receiver based on the operation mode information,

wherein the configuration packet of the wireless power transmitter comprises the operation mode information of the wireless power transmitter.

8. The wireless power transmitter of claim 1, wherein when the operation mode information indicates the second mode, but the second mode is not supported, communication error information is transmitted to the wireless power receiver, and power is not transmitted to the wireless power receiver.

9. A wireless power receiver for receiving power from a wireless power transmitter in a wireless manner, the wireless power receiver comprising:

a power unit configured to receive the power from the wireless power transmitter; and

a controller configured to control the wireless power receiver,

wherein the wireless power receiver is configured to;

transmit at least one of an identification packet or a configuration packet to the wireless power transmitter in a first mode;

determine, based on the configuration packet, whether or not the wireless power receiver supports a second mode different from the first mode; and

communicate with the wireless power transmitter in at least one of the first mode or the second mode when the wireless power receiver supports the second mode,

wherein the first mode is used for communication between one wireless power transmitter and one wireless power receiver, and the second mode is used for communication between one wireless power transmitter and a plurality of wireless power receivers, and

wherein the configuration packet comprises operation mode information indicating a communication execution mode supported by the wireless power receiver.

10. The wireless power receiver of claim 9, wherein communication is carried out between the wireless power transmitter and the wireless power receiver based on the operation mode information.

11. The wireless power receiver of claim 9, wherein the power is received from the wireless power transmitter when the operation mode information indicates the first mode, and preset packets containing a power control message are sequentially transmitted to the wireless power transmitter when the operation mode information indicates the second mode.

12. The wireless power receiver of claim 9, wherein when communication error information is received in response to the configuration packet, power is not received from the wireless power transmitter.