NON-CONTACT POWER SUPPLY DEVICE AND NON-CONTACT POWER SUPPLY METHOD

• US 20150137748A1
• Filed: 11/19/2014
• Published: 05/21/2015
• Est. Priority Date: 11/20/2013
• Status: Active Grant

• Current Assignee: Wit Co., Ltd.
• Original Assignee: Samsung Electro-Mechanics Co., Ltd. (Samsung Group)
• Inventors: LEE, Sung Uk, CHANG, Ki Won, PARK, Chul Gyun, SUNG, Jae Suk, KIM, Si Hyung, OH, Soon Tack, LIM, Hyun Keun, KANG, Chang Soo
• Granted Patent: US 10,454,303 B2
• Time in Patent Office: Days
• US Class Current: 320/108
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/12 of the resonant type
• 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 50/90 involving detection or optimisation of position, e.g. alignment
• 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 9/005 using a power saving mode for copiers G03G15/5004
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer

Abstract

There are provided a non-contact power supply device and a non-contact power supply method, in which a short beacon is transmitted to recognize a power receiving device, a long beacon is transmitted to wake-up a communications circuit of the power receiving device, and charging power is transmitted in a contactless manner, wherein at least one of signal levels of the short beacon and signal levels of the long beacon is varied.

Claims

1. A non-contact power supply device transmitting a short beacon according to a first period to recognize a power receiving device and transmitting a charging power in a contactless manner, the non-contact power supply device comprising:

a power transmitting unit controlling the transmission of the short beacon and the charging power;

a power transmitting coil transmitting the short beacon and the charging power in a contactless manner according to the controlling of the power transmitting unit; and

a controlling unit controlling variations in signal levels of the short beacon.

2. The non-contact power supply device of claim 1, wherein the controlling unit controls the signal levels of the short beacon by controlling a voltage level of input power applied to the power transmitting unit.

3. The non-contact power supply device of claim 1, further comprising a detecting unit detecting variations in impedance of the power transmitting coil.

4. The non-contact power supply device of claim 3, wherein the controlling unit controls the signal levels of the short beacon according to a detection result from the detecting unit.

5. The non-contact power supply device of claim 1, wherein the controlling unit sequentially increases the signal levels of the short beacon.

6. The non-contact power supply device of claim 5, wherein the controlling unit sequentially increases the signal levels of the short beacon from a minimum signal level to a maximum signal level among a plurality of set signal levels.

7. The non-contact power supply device of claim 5, wherein the controlling unit sequentially increases the signal levels of the short beacon from a signal level corresponding to a signal level when the power receiving device has previously been recognized to a maximum signal level among a plurality of set signal levels.

8. The non-contact power supply device of claim 1, wherein the controlling unit randomly varies the signal levels of the short beacon.

9. The non-contact power supply device of claim 1, wherein the controlling unit controls transmission of a long beacon for waking-up a communications circuit of the power receiving device which is transmitted according to a second period different from the first period, and

signal levels of the long beacon are fixed.

10. The non-contact power supply device of claim 1, wherein the controlling unit controls signal levels of a long beacon for waking-up a communications circuit of the power receiving device to be sequentially varied within a set time until an advertisement signal is received from the power receiving device when the power receiving device has been recognized by the transmission of the short beacon.

11. A non-contact power supply device transmitting a long beacon according to a period to wake-up a communications circuit of a power receiving device and transmitting a charging power in a contactless manner, the non-contact power supply device comprising:

a power transmitting unit controlling the transmission of the long beacon and the charging power;

a power transmitting coil transmitting the long beacon and the charging power in a contactless manner according to the controlling of the power transmitting unit; and

a controlling unit controlling variations in signal levels of the long beacon.

12. The non-contact power supply device of claim 11, wherein the controlling unit controls the signal levels of the long beacon by controlling a voltage level of input power applied to the power transmitting unit.

13. The non-contact power supply device of claim 11, wherein the controlling unit sequentially increases the signal levels of the long beacon.

14. The non-contact power supply device of claim 13, wherein the controlling unit sequentially increases the signal levels of the long beacon from a minimum signal level to a maximum signal level among a plurality of set signal levels.

15. The non-contact power supply device of claim 13, wherein the controlling unit sequentially increases the signal levels of the long beacon from a signal level corresponding to a signal level when the communications circuit of the power receiving device has previously been woken-up to a maximum signal level among a plurality of set signal levels.

16. The non-contact power supply device of claim 11, wherein the controlling unit randomly varies the signal levels of the long beacon.

17. The non-contact power supply device of claim 11, wherein the controlling unit controls transmission of a short beacon for recognizing the power receiving device, and

signal levels of the short beacon are fixed.

18. The non-contact power supply device of claim 11, wherein the controlling unit controls signal levels of a long beacon in a next period depending on whether or not an advertisement signal has been received from the power receiving device.

19. A non-contact power supply device transmitting a short beacon according to a first period to recognize a power receiving device, waking-up a communications circuit of the power receiving device by transmitting a long beacon according to a second period different from the first period, and transmitting a charging power in a contactless manner, the non-contact power supply device comprising:

a power transmitting unit controlling the transmission of the short beacon, the long beacon, and the charging power;

a power transmitting coil transmitting the short beacon, the long beacon, and the charging power in a contactless manner according to the controlling of the power transmitting unit; and

a controlling unit controlling variations in signal levels of the short beacon and signal levels of the long beacon.

20. The non-contact power supply device of claim 19, wherein the controlling unit controls the signal levels of the short beacon and the signal levels of the long beacon by controlling a voltage level of input power applied to the power transmitting unit.

21. The non-contact power supply device of claim 19, wherein the controlling unit sequentially increases the signal levels of the short beacon or the signal levels of the long beacon.

22. The non-contact power supply device of claim 21, wherein the controlling unit sequentially increases the signal levels of the short beacon or the signal levels of the long beacon from a minimum signal level to a maximum signal level among a plurality of set signal levels.

23. The non-contact power supply device of claim 21, wherein the controlling unit sequentially increases the signal levels of the short beacon from a signal level corresponding to a signal level when the power receiving device has previously been recognized to a maximum signal level among a plurality of set signal levels.

24. The non-contact power supply device of claim 21, wherein the controlling unit sequentially increases the signal levels of the long beacon from a signal level corresponding to a signal level when the communications circuit of the power receiving device has previously been woken-up to a maximum signal level among a plurality of set signal levels.

25. The non-contact power supply device of claim 19, wherein the controlling unit randomly varies the signal levels of the short beacon or the signal levels of the long beacon.

26. The non-contact power supply device of claim 19, wherein the controlling unit controls the signal levels of the long beacon to be sequentially increased within a set time until an advertisement signal is received from the power receiving device when the power receiving device has been recognized by the transmission of the short beacon.

27. A non-contact power supply method comprising:

a power save state receiving an advertisement signal from a power receiving device by transmitting a short beacon for recognizing the power receiving device according to a first period and transmitting a long beacon for waking-up a communications circuit of the power receiving device according to a second period different from the first period by a non-contact power supply device;

a low power state performing communications between the non-contact power supply device and the power receiving device; and

a power transfer state transmitting the charging power from the non-contact power supply device to the power receiving device,

wherein at least one of signal levels of the short beacon and signal levels of the long beacon is varied.

28. The non-contact power supply method of claim 27, wherein, in the power save state, the non-contact power supply device sequentially increases the signal levels of the short beacon or the signal levels of the long beacon according to the period.

29. The non-contact power supply method of claim 28, wherein, in the power save state, the non-contact power supply device sequentially increases the signal levels of the short beacon or the signal levels of the long beacon from a minimum signal level to a maximum signal level among a plurality of set signal levels.

30. The non-contact power supply method of claim 28, wherein, in the power save state, the non-contact power supply device sequentially increases the signal levels of the short beacon from a signal level corresponding to a signal level when the power receiving device has previously been recognized to a maximum signal level among a plurality of set signal levels.

31. The non-contact power supply method of claim 27, wherein, in the power save state, the non-contact power supply device sequentially increases the signal levels of the long beacon from a minimum signal level to a maximum signal level among a plurality of set signal levels within a set time until the advertisement signal is received from the power receiving device when the power receiving device has been recognized after transmitting the short beacon.

32. The non-contact power supply method of claim 27, wherein, in the power save state, the non-contact power supply device randomly varies the signal levels of the short beacon or the signal levels of the long beacon.

33. The non-contact power supply method of claim 27, wherein, in the power save state, the non-contact power supply device sequentially increases the signal levels of the long beacon from a signal level corresponding to a signal level when the communications circuit of the power receiving device has previously been woken-up to a maximum signal level among a plurality of set signal levels.

34. The non-contact power supply method of claim 28, wherein, in the power save state, the non-contact power supply device varies the signal levels of the short beacon until impedance in a power transmitting side is changed to a predetermined level or more.

35. The non-contact power supply method of claim 28, wherein, in the power save state, the non-contact power supply device controls the signal levels of the long beacon depending on whether or not the advertisement signal has been received from the power receiving device.