Electronic device and wireless power receiver equipped in the same

• US 9,281,694 B2
• Filed: 10/17/2012
• Issued: 03/08/2016
• Est. Priority Date: 10/18/2011
• Status: Active Grant

• Current Assignee: Nera Innovations Limited (Atlantic IP Services Limited)
• Original Assignee: LG Innotek Company Limited (LG Corporation)
• Inventors: Lee, Jung Oh
• Primary Examiner(s): Barnie, Rexford
• Assistant Examiner(s): Willoughby, Terrence
• Application Number:
  US13/653,755
• Publication Number:
  US 20130093258A1
• Time in Patent Office: 1,238 Days
• Field of Search: 307/104
• US Class Current: 1/1
• 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 50/12 of the resonant type
• CPC Class Codes: H02J 7/00 Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries

Abstract

A wireless power receiver for receiving power from a wireless power transmitter using resonance according to the embodiment includes a reception resonant coil resonance-coupled with a transmission resonant coil of the wireless power transmitter for receiving the power, a reception induction coil coupled with the reception resonant coil for receiving the power, and a connecting unit, and the reception resonant coil includes at least one conductive line having one end and an opposite end being open with each other, and the connecting unit couples the one end and the opposite end of each conductive line with each other so that the reception resonant coil forms a closed loop.

Claims

1. A portable device for receiving power from a wireless power transmitter using resonance, the portable device comprising:

a reception resonant coil resonance-coupled with a transmission resonant coil of the wireless power transmitter for receiving the power, the reception resonant coil including a conductive line, wherein the conductive line has a first end and a second end being open to each other; and

a connecting unit including a first connector and a second connector,

wherein both ends of the conductive line are disposed in the connecting unit,

wherein the first end of the conductive line is disposed in the first connector and the second end of the conductive line is disposed in the second connector, the first and second connectors being connectable to each other so that the reception resonant coil forms a closed loop.

2. The portable device of claim 1, wherein the first and second connectors are connected using an auxiliary connecting unit for a connection of the conductive line, and

wherein the auxiliary connecting unit maintains the connection of the conductive line.

3. The portable device of claim 2, wherein the conductive line includes n conductive lines, n being an integer equal to or greater than 2;

wherein each of the n conductive lines has its own first and second ends and wherein the first end of a first conductive line and a second end of a second conductive line are connectable to each other so that the reception resonant coil forms a closed loop.

4. The portable device of claim 2, wherein the auxiliary connecting unit includes a first auxiliary connector and a second auxiliary connector, and

wherein each of the first and second auxiliary connectors comprises a permanent magnet having different polarities.

5. The portable device of claim 1, wherein the connecting unit comprises an elastic member.

6. The portable device of claim 5, wherein the elastic member comprises a polymer resin or a resin composite.

7. The portable device of claim 1, wherein the reception resonant coil comprises an inductor and a capacitor.

8. The portable device of claim 7, wherein the capacitor includes a variable capacitor for matching resonant frequency with the transmission resonant coil.

9. The portable device of claim 1, further comprising

a reception induction coil coupled with the reception resonant coil for receiving the power,

wherein the reception induction coil comprises an inductor and a capacitor.

10. The portable device of claim 1, further comprising a rectifier circuit converting AC power received from the reception induction coil into DC power and transferring the DC power to a load.

11. The portable device of claim 1, wherein a radius of the reception resonant coil is greater than a radius of the transmission resonant coil.

12. The portable device of claim 1, wherein the first and second connectors include a first output line and a second output line, respectively;

and

wherein the first end of the conductive line is connected to one of the first and second output lines and the second end of the conductive line is connected to the other of the first and second output lines.

13. The portable device of claim 3, wherein the first and second connectors include a first output line and a second output line, respectively;

and

wherein the second end of the first conductive line is connected to one of the first and second output lines and the first end of a n-th conductive line is connected to the other of the first and second output lines.