Wireless power receiver and control method thereof

• US 10,153,666 B2
• Filed: 08/10/2017
• Issued: 12/11/2018
• Est. Priority Date: 11/04/2011
• Status: Active Grant

• Current Assignee: Nera Innovations Limited (Atlantic IP Services Limited)
• Original Assignee: LG Innotek Company Limited (LG Corporation)
• Inventors: Lee, Ki Min, Lee, Jung Oh
• Primary Examiner(s): Fleming, Fritz M
• Application Number:
  US15/673,763
• Publication Number:
  US 20170338697A1
• Time in Patent Office: 488 Days
• CPC Class Codes: G06K 19/0708 the source being electromagnetic or magnetic
• CPC Class Codes: G06K 19/0715 the arrangement including means to regulate power transfer to the integrated circuit
• CPC Class Codes: G06K 19/07783 the coil being planar
• CPC Class Codes: H01Q 1/2225 used in active tags, i.e. provided with its own power source or in passive tags, i.e. deriving power from RF signal
• CPC Class Codes: H01Q 1/526 Electromagnetic shields
• CPC Class Codes: H01Q 7/00 Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
• CPC Class Codes: H02J 50/005 Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• 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 7/00714 in response to battery charging or discharging current
• CPC Class Codes: H04B 5/263 Multiple coils at either side
• CPC Class Codes: H04B 5/72 for local intradevice communication
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer

Abstract

A wireless power receiver according to an embodiment wirelessly receives power from a wireless power transmitter. The wireless power receiver includes a printed circuit board having a reception space in a predetermined area, a receiving coil disposed in the reception space of the printed circuit board for receiving power from the wireless power transmitter, and a short-range communication antenna disposed on the printed circuit board while surrounding the receiving coil.

Claims

1. A wireless power receiver that wirelessly receives power from a wireless power transmitter, the wireless power receiver comprising:

a board comprising a plurality of layers;

a wireless receiving coil disposed in the board;

a short-range communication coil disposed in the board; and

a shielding unit disposed in the board,

wherein the shielding unit is disposed on the wireless receiving coil and the short range communication coil, and

wherein the wireless receiving coil, the short-range communication coil, and the shielding unit are disposed between the plurality of layers.

2. A wireless power receiver of claim 1,

wherein the plurality of players comprises a first layer, a second layer under the first layer, and a third layer under the second layer.

3. A wireless power receiver of claim 2,

wherein the shielding unit is disposed between the first layer and the second layer.

4. A wireless power receiver of claim 3,

wherein the short-range communication coil is disposed between the second layer and the third layer.

5. A wireless power receiver of claim 4,

further comprising a separation distance between the second layer and the third layer.

6. A wireless power receiver of claim 5,

wherein the separation distance is smaller than a thickness of the short-range communication coil.

7. A wireless power receiver of claim 3,

wherein the wireless receiving coil is disposed between the second layer and the third layer.

8. A wireless power receiver of claim 7,

further comprising a separation distance between the second layer and the third layer.

9. A wireless power receiver of claim 8,

wherein the separation distance is smaller than a thickness of the wireless receiving coil.

10. A wireless power receiver of claim 1,

wherein the plurality of layers comprises a first layer, a second layer under the first layer, a third layer under the second layer, and a fourth layer under the third layer.

11. A wireless power receiver of claim 10,

wherein the shielding unit is disposed between the first layer and the second layer.

12. A wireless power receiver of claim 11,

wherein the wireless receiving coil comprises a plurality of layers.

13. A wireless power receiver of claim 12,

wherein the wireless receiving coil is disposed between the second layer and the third layer and between the third layer and the fourth layer.

14. A wireless power receiver of claim 13,

further comprising a separation distance between the second layer and the third layer and between the third layer and the fourth layer.

15. A wireless power receiver of claim 14,

wherein the separation distance is smaller than a thickness of at least one of the plurality of layers of the wireless receiving coil.

16. A wireless power receiver of claim 11,

wherein the short-range communication coil comprises a plurality of layers.

17. A wireless power receiver of claim 16,

wherein the short-range communication coil is disposed between the second layer and the third layer and between the third layer and the fourth layer.

18. A wireless power receiver of claim 17,

further comprising a separation distance between the second layer and the third layer and between the third layer and the fourth layer.

19. A wireless power receiver of claim 18,

wherein the separation distance is smaller than a thickness of at least one of the plurality of layers of the short-range communication coil.

20. A wireless power receiver of claim 1,

wherein the wireless receiving coil comprises a first wireless receiving coil and a second wireless receiving coil,

wherein at least one of the plurality of layers is disposed between the first wireless receiving coil and the second wireless receiving coil.

21. A wireless power receiver of claim 20,

wherein a thickness of the first wireless receiving coil is thinner than a thickness of the shielding unit.

22. A wireless power receiver of claim 21,

wherein a thickness of the first wireless receiving coil is thicker than a thickness of at least one of the plurality of layers.

23. A wireless power receiver of claim 1,

wherein the short-range communication coil comprises a first short-range communication coil and a second short-range communication coil,

wherein at least one of the plurality of layers is disposed between the first short-range communication coil and the second short-range communication coil.

24. A wireless power receiver of claim 23,

wherein a thickness of the first short-range communication coil is thinner than a thickness of the shielding unit.

25. A wireless power receiver of claim 24,

wherein a thickness of the first short-range communication coil is thicker than a thickness of at least one of the plurality of layers.

26. A wireless power receiver of claim 1,

wherein the wireless receiving coil is surrounded by the short-range communication coil.

27. A wireless power receiver of claim 1,

wherein the shielding unit is arranged to correspond to an area occupied by the wireless power receiving coil and the short-range communication coil.

28. A wireless power receiver of claim 1,

wherein the shielding unit comprises a ferrite.

29. A wireless power receiver of claim 1,

wherein the board comprises a reception space.