Wireless power transmitter, wireless power receiver and control method thereof

• US 10,491,053 B2
• Filed: 08/08/2018
• Issued: 11/26/2019
• Est. Priority Date: 05/03/2013
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Byun, Kang-Ho, Lee, Kyung-Woo, Lee, Ho-Seong, Kwon, Hyuk-Choon, Jung, Soo-Yeon, Jung, Hee-Won
• Primary Examiner(s): Perez Borroto, Alfonso
• Application Number:
  US16/058,582
• Publication Number:
  US 20180375388A1
• Time in Patent Office: 475 Days
• Field of Search: 307104
• 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 50/60 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: H02J 7/02 for charging batteries from ac mains by converters
• 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: H04W 76/14 Direct-mode setup

Abstract

Disclosed is a control method for transmitting charging power to a wireless power receiver in a wireless power transmitter, wherein a connection request signal is transmitted to the wireless power receiver for forming a communication connection between the wireless power transmitter and the wireless power receiver, based on information about a characteristic of an advertisement signal transmitted to the wireless power transmitter, the advertisement signal including a handle value for a preset universally unique identifier, the wireless power receiver is registered to a wireless power network corresponding to the wireless power transmitter through the communication connection, and wireless charging power is transmitted to the wireless power receiver after registering the wireless power receiver.

Claims

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

applying beacon power for detecting the wireless power receiver into a resonator of the wireless power transmitter;

in response to detecting a change of a load impedance of the resonator while applying the beacon power, applying driving power into the resonator, wherein the wireless power receiver transmits an advertisement signal to the wireless power transmitter by using at least part of the driving power wirelessly received from the wireless power transmitter;

receiving the advertisement signal from the wireless power receiver, the advertisement signal including a handle value for a preset universally unique identifier (UUID);

obtaining information about a characteristic of the advertisement signal, wherein the handle value is assigned to the characteristic;

transmitting a connection request signal to the wireless power receiver for forming a communication connection between the wireless power transmitter and the wireless power receiver, based on the information;

registering the wireless power receiver to a wireless power network corresponding to the wireless power transmitter through the communication connection; and

transmitting wireless charging power to the wireless power receiver after registering the wireless power receiver.

2. The control method of claim 1, wherein the handle value indicates at least one characteristic of the UUID.

3. The control method of claim 2, wherein transmitting the connection request signal comprises performing at least one of transmission of a read signal to the wireless power receiver, reception of a read response signal from the wireless power receiver, and transmission of a write signal to the wireless power receiver, based on the handle value for the at least one characteristic of the UUID.

4. The control method of claim 2, further comprising:

sequentially determining handle values of other characteristics of the UUID based on the handle value for the at least one characteristic of the UUID.

5. The control method of claim 2, further comprising:

sequentially determining handle values of other characteristics of the UUID based on the handle value for the at least one characteristic of the UUID and a pre-stored computation rule.

6. The control method of claim 1, wherein the preset UUID includes a wireless power transfer service.

7. The control method of claim 1, further comprising:

forming a communication connection with the wireless power receiver.

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

receiving driving power into a resonator of the wireless power receiver, wherein the wireless power receiver transmits an advertisement signal to the wireless power transmitter by using at least part of the driving power wirelessly received from the wireless power transmitter;

transmitting the advertisement signal to the wireless power transmitter, the advertisement signal including a handle value related to a preset universally unique identifier (UUID) for the wireless power transmitter;

obtaining information about a characteristic of the advertisement signal, wherein the handle value is assigned to the characteristic;

receiving a communication connection request signal from the wireless power transmitter;

forming a communication connection between the wireless power transmitter and the wireless power receiver, based on the communication connection request signal;

joining a wireless power network corresponding to the wireless power transmitter through the communication connection; and

receiving wireless charging power from the wireless power transmitter after joining the wireless power network.

9. The control method of claim 8, wherein the handle value indicates at least one characteristic of the UUID.

10. The control method of claim 9, wherein receiving the communication connection request signal comprises performing at least one of reception of a read signal from the wireless power transmitter, transmission of a read response signal to the wireless power transmitter, and reception of a write signal from the wireless power transmitter, based on the handle value for the at least one characteristic of the UUID.

11. The control method of claim 9, wherein handle values of other characteristics of the UUID are sequentially determined based on the handle value for the at least one characteristic of the UUID.

12. The control method of claim 8, wherein the preset UUID includes a wireless power transfer service.

13. A wireless power transmitter for transmitting charging power to a wireless power receiver, the wireless power transmitter comprising:

a communication unit; and

a controller configured to;

apply beacon power for detecting the wireless power receiver into a resonator of the wireless power transmitter,

in response to detecting a change of a load impedance of the resonator while applying the beacon power, apply driving power into the resonator, wherein the wireless power receiver transmits an advertisement signal to the wireless power transmitter by using at least part of the driving power wirelessly received from the wireless power transmitter,

receive, using the communication unit, the advertisement signal from the wireless power receiver, the advertisement signal including a handle value for a preset universally unique identifier (UUID),

obtain information about a characteristic of the advertisement signal, wherein the handle value is assigned to the characteristic,

transmit, using the communication unit, a connection request signal to the wireless power receiver for forming a communication connection between the wireless power transmitter and the wireless power receiver, based on the information,

register the wireless power receiver to a wireless power network corresponding to the wireless power transmitter through the communication connection, and

transmit wireless charging power to the wireless power receiver after registering the wireless power receiver.

14. The wireless power transmitter of claim 13, wherein the handle value indicates at least one characteristic of the UUID.

15. The wireless power transmitter of claim 14, wherein the controller is further configured to perform at least one of transmission of a read signal to the wireless power receiver, reception of a read response signal from the wireless power receiver, and transmission of a write signal to the wireless power receiver, based on the handle value for the at least one characteristic of the UUID.

16. The wireless power transmitter of claim 14, wherein the controller is further configured to sequentially determine handle values of other characteristics of the UUID based on the handle value for the at least one characteristic of the UUID.

17. The wireless power transmitter of claim 14, wherein the controller is further configured to sequentially determine handle values of other characteristics of the UUID based on the handle value for the at least one characteristic of the UUID and a pre-stored computation rule.

18. The wireless power transmitter of claim 13, wherein the controller is further configured to form a communication connection with the wireless power receiver.

19. The wireless power transmitter of claim 13, wherein the preset UUID includes a wireless power transfer service.

20. A wireless power receiver for receiving charging power from a wireless power transmitter, wireless power receiver comprising:

a communication unit; and

a controller configured to;

receive driving power into a resonator of the wireless power receiver, wherein the wireless power receiver transmits an advertisement signal to the wireless power transmitter by using at least part of the driving power wirelessly received from the wireless power transmitter,

transmit, using the communication unit, the advertisement signal to the wireless power transmitter, the advertisement signal including a handle value related to a preset universally unique identifier (UUID) for the wireless power transmitter,

obtain information about a characteristic of the advertisement signal, wherein the handle value is assigned to the characteristic,

receive, using the communication unit, a communication connection request signal from the wireless power transmitter,

form a communication connection between the wireless power transmitter and the wireless power receiver, based on the communication connection request signal,

join a wireless power network corresponding to the wireless power transmitter through the communication connection, and

receive wireless charging power from the wireless power transmitter after joining the wireless power network.

21. The wireless power receiver of claim 20, wherein the handle value indicates at least one characteristic of the UUID.

22. The wireless power receiver of claim 21, wherein the controller is further configured to perform at least one of reception of a read signal from the wireless power transmitter, transmission of a read response signal to the wireless power transmitter, and reception of a write signal from the wireless power transmitter, based on the handle value for the at least one characteristic of the UUID.

23. The wireless power receiver of claim 21, wherein the handle values of other characteristics of the UUID are sequentially determined based on the handle value for the at least one characteristic of the UUID.

24. The wireless power receiver of claim 20, wherein the preset UUID includes a wireless power transfer service.