WIRELESS CHARGING BOARD AND WIRELESS CHARGING DEVICE

• US 20170012458A1
• Filed: 01/21/2015
• Published: 01/12/2017
• Est. Priority Date: 01/22/2014
• Status: Active Grant

• Current Assignee: Nera Innovations Limited (Atlantic IP Services Limited)
• Original Assignee: LG Innotek Company Limited (LG Corporation)
• Inventors: SONG, Ji Yeon, BAE, Seok, HYUN, Soon Young
• Granted Patent: US 10,476,316 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H01F 27/2804 Printed windings
• CPC Class Codes: H01F 27/288 Shielding
• CPC Class Codes: H01F 27/402 Association of measuring or protective means
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• 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 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• CPC Class Codes: H05K 1/165 incorporating printed inductors
• CPC Class Codes: H05K 2201/086 for inductive purposes, e.g. printed inductor with ferrite core

Abstract

Provided are a wireless charging board and a wireless charging device. The wireless charging board includes: a shielding layer; a coil pattern disposed on one surface of the shielding layer; and a magnetic pattern disposed in a space of a central part of the coil pattern.

Claims

1-14. -14. (canceled)

15. A wireless charging board comprising:

a shielding layer;

a coil pattern disposed on one surface of the shielding layer; and

a magnetic pattern disposed in a space of a central part of the coil pattern.

16. The wireless charging board of claim 15, wherein the magnetic pattern is disposed on the same plane as the coil pattern.

17. The wireless charging board of claim 15, wherein a thickness of the magnetic pattern is equal to or less than a thickness of the coil pattern.

18. The wireless charging board of claim 15, wherein an area of the magnetic pattern is 2% to 40% of an area of the one surface of the shielding layer.

19. The wireless charging board of claim 15, wherein a width of the magnetic pattern is 0.9 to 1.5 mm.

20. The wireless charging board of claim 15, wherein a relative permeability of the magnetic pattern is 10 to 100000.

21. The wireless charging board of claim 15, wherein a magnetic flux density of the magnetic pattern is 0.4 to 2.5 Tesla (T).

22. The wireless charging board of claim 15, wherein the magnetic pattern is formed of iron (Fe)-based non-directional electrical steel, Fe-based directional electrical steel, or stainless steel.

23. The wireless charging board of claim 15, wherein a thickness of the shielding layer is 1 to 600 μ

m.

24. The wireless charging board of claim 15, wherein a relative permeability of the shielding layer is 10 to 1000.

25. The wireless charging board of claim 15, wherein the shielding layer comprises an Fe-based magnetic material.

26. The wireless charging board of claim 15, further comprising an adhesive layer which attaches the coil pattern to the shielding layer.

27. A wireless charging device comprising:

a wireless charging board comprising a first shielding layer, a first coil pattern disposed on one surface of the first shielding layer, and a magnetic pattern disposed in a space of a central part of the first coil pattern; and

a charge inducing board comprising a second shielding layer and a second coil pattern disposed on one surface of the second shielding layer, and which induces an alternating current (AC) in the first coil pattern.

28. The wireless charging device of claim 27, wherein the charge inducing board is disposed to face the wireless charging board.

29. The wireless charging device of claim 27, wherein the charge inducing board further comprises a hall sensor which measures a change in a voltage difference in a central part of the second coil pattern.

30. The wireless charging device of claim 29, wherein the hall sensor is spaced a predetermined distance apart from a vertical central axis of the first shielding layer in a horizontal direction.

31. The wireless charging device of claim 29, wherein an area of the magnetic pattern is 2% to 40% of an area of the one surface of the first shielding layer.

32. The wireless charging device of claim 30, wherein a change in a voltage difference measured by the hall sensor based on a distance between the wireless charging board and the charge inducing board is 120 mV or more.

33. The wireless charging device of claim 29, wherein a width of the magnetic pattern is 0.9 to 1.5 mm.

34. The wireless charging device of claim 33, wherein a change in a voltage difference measured by the hall sensor based on a distance between the wireless charging board and the charge inducing board is 120 to 200 mV.