Wireless power receiver and control method thereof

• US 9,461,364 B2
• Filed: 10/23/2012
• Issued: 10/04/2016
• 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:
  US13/658,116
• Publication Number:
  US 20130113422A1
• Time in Patent Office: 1,442 Days
• Field of Search: 307/104, 320/108
• US Class Current: 1/1
• 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 configured to wirelessly receive power from a wireless power transmitter, the wireless power receiver comprising:

a shielding unit;

a receiving coil disposed on the shielding unit; and

a short-range communication antenna disposed on the shielding unit,

wherein the shielding unit shields a magnetic field generated from the receiving coil,

wherein the short-range communication antenna surrounds the receiving coil, and

wherein the shielding unit covers the receiving coil and the short-range communication antenna.

2. The wireless power receiver of claim 1, further comprising a printed circuit board on the shielding unit, wherein the short-range communication antenna is on the printed circuit board.

3. The wireless power receiver of claim 2, wherein the receiving coil has a thickness equal to or less than a thickness of the printed circuit board.

4. The wireless power receiver of claim 2, wherein the printed circuit board comprises a reception space, and wherein the receiving coil is disposed within the reception space of the printed circuit board.

5. The wireless power receiver of claim 2, wherein the receiving coil is disposed within a reception space of the printed circuit board, and wherein the short-range communication antenna surrounds the reception space.

6. The wireless power receiver of claim 1, wherein the short-range communication antenna includes an NFC (Near Field Communication) antenna.

7. The wireless power receiver of claim 1, further comprising a switch for changing a conducting state of the short-range communication antenna according to reception of the power,

wherein the wireless power receiver opens or shorts the switch according to the reception of the power, and

wherein the wireless power receiver opens the switch when the power is received and shorts the switch when the power is not received.

8. A wireless power receiver configured to wirelessly receive power from a wireless power transmitter, the wireless power receiver comprising:

a shielding unit;

a receiving coil disposed on the shielding unit; and

a short-range communication antenna disposed on the shielding unit,

wherein the shielding unit shields a magnetic field generated from the receiving coil,

wherein the short-range communication antenna surrounds the receiving coil,

wherein the shielding unit has a reception space in a predetermined area thereof, and

wherein the wireless power receiver further comprises a wireless charging circuit disposed in the reception space of the shielding unit to transfer rectified power to a load by rectifying power received from the receiving coil.

9. The wireless power receiver of claim 8, wherein the wireless charging circuit has a thickness equal to or less than a thickness of the shielding unit.