METHOD FOR CONTROLLING WIRELESS POWER TRANSMITTER AND WIRELESS POWER RECEIVER

• US 20150214775A1
• Filed: 01/29/2015
• Published: 07/30/2015
• Est. Priority Date: 01/29/2014
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: LEE, Kyung-Woo, JUNG, Hee-Won, BYUN, Kang-Ho
• Granted Patent: US 10,084,344 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/40 using two or more transmitting or receiving devices H02J50/50 takes precedence
• 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

Abstract

A control method of a wireless power transmitter for transmitting charging power to a wireless power receiver is provided. The control method includes receiving setting information from the wireless power receiver, determining a load variation of the wireless power receiver for a set time period, and determining that the wireless power receiver is a charging target, if the load variation of the wireless power matches the received setting information.

Claims

1. A control method of a wireless power transmitter for transmitting charging power to a wireless power receiver, the method comprising:

receiving setting information from the wireless power receiver;

determining a load variation of the wireless power receiver for a set time period; and

determining that the wireless power receiver is a charging target, if the load variation of the wireless power matches the received setting information.

2. The method of claim 1, wherein the setting information includes binary data.

3. The method of claim 1, wherein the setting information is information related to a time of a load variation.

4. The method of claim 1, wherein the setting information is information related to a pattern of a load variation.

5. The method of claim 1, after determining the load variation of the wireless power receiver, further comprising:

converting the load variation to binary information; and

comparing the binary information with the received setting information.

8. The method of claim 1, wherein determining the load variation comprises determining the load variation by performing a primary measurement a predetermined first time (Δ

T₁) after a time of receiving a signal from the wireless power receiver and performing a secondary measurement a predetermined second time (Δ

T₂) later.

6. A control method of a wireless power transmitter for transmitting charging power to a wireless power receiver, the method comprising:

transmitting setting information to the wireless power receiver;

determining a load variation of the wireless power receiver for a set time period; and

determining that the wireless power receiver is a charging target, if the load variation of the wireless power matches the setting information.

7. A control method of a wireless power transmitter for transmitting charging power to a wireless power receiver, the method comprising:

receiving time set information from the wireless power receiver;

determining a load variation of the wireless power receiver for a set time period; and

determining that the wireless power receiver is a charging target, if the load variation of the wireless power matches the received time set information.

9. A control method of a wireless power receiver for receiving charging power from a wireless power transmitter, the method comprising:

transmitting setting information to the wireless power receiver;

changing a load state according to a pattern included in the setting information for a set time period;

receiving information indicating cross charging or non-cross charging from the wireless power transmitter; and

terminating a connection to the wireless power transmitter, if cross charging is determined based on the received information indicating cross charging or non-cross charging.

10. The method of claim 9, wherein the setting information includes binary data.

11. The method of claim 9, wherein the setting information is randomly generated information.

12. The method of claim 9, wherein the setting information includes a plurality of bits.

13. A control method of a wireless power receiver for receiving charging power from a wireless power transmitter, the method comprising:

receiving setting information from the wireless power receiver;

changing a load state according to the setting information for a set time period;

receiving information indicating cross charging or non-cross charging from the wireless power transmitter; and

ending a connection to the wireless power transmitter, if cross charging is determined based on the received information indicating cross charging or non-cross charging.

14. The method of claim 13, wherein the setting information includes binary data.

15. The method of claim 13, wherein the setting information is randomly generated information.

16. The method of claim 13, wherein the setting information includes a plurality of bits.

17. A control method of a wireless power receiver for receiving charging power from a wireless power transmitter, the method comprising:

transmitting time set information to the wireless power transmitter;

changing a load state according to the time set information for a set time period;

receiving information indicating cross charging or non-cross charging from the wireless power transmitter; and

terminating a connection to the wireless power transmitter, if cross charging is determined based on the received information indicating cross charging or non-cross charging.

18. The method of claim 17, wherein the time set information includes binary data.

19. The method of claim 17, wherein the time set information is randomly generated information.

20. The method of claim 17, wherein the time set information includes a plurality of bits.