Wireless power receiver device, wireless power transmitter device, and wireless power transceiver device

• US 10,033,217 B2
• Filed: 02/26/2015
• Issued: 07/24/2018
• Est. Priority Date: 10/17/2012
• Status: Active Grant

• Current Assignee: Murata Manufacturing Co Limited
• Original Assignee: Murata Manufacturing Co Limited
• Inventors: Goma, Shinji, Kato, Kazuya, Ieki, Tsutomu
• Primary Examiner(s): Wells, Kenneth B
• Application Number:
  US14/632,704
• Publication Number:
  US 20150222130A1
• Time in Patent Office: 1,244 Days
• CPC Class Codes: H02J 50/05 using capacitive coupling
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/402 the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• CPC Class Codes: H02J 7/0029 with safety or protection devices or circuits
• CPC Class Codes: H02J 7/00304 Overcurrent protection
• CPC Class Codes: H02J 7/00308 Overvoltage protection

Abstract

A wireless power receiver device includes a sheet-like electrode sheet section and a power receiver section. The electrode sheet section includes a power receiver side active electrode and a power receiver side passive electrode that are substantially coplanar and formed into sheet-like shapes; lead lines that are coplanar with both the electrodes, extended from the respective electrodes, and formed into sheet-like shapes; and an insulation sheet that covers both the electrodes and both the lead lines from both sides thereof. The power receiver section includes a step-down unit that steps down an alternating-current voltage induced between end portions of the lead lines; a power receiver module that rectifies and smoothes the alternating-current voltage that is stepped down by the step-down unit; and a connector for outputting an output voltage of the power receiver module.

Claims

1. A wireless power receiver device, comprising:

an electrode sheet including;

an active electrode and a passive electrode that are substantially coplanar,

a pair of lead lines that are coplanar with the active and passive electrodes and extend therefrom, respectively, and

a planar insulator that covers both sides of the active and passive electrodes and the pair of lead lines; and

a power receiver including;

a step-down unit configured to step down an alternating-current voltage induced between the pair of lead lines,

a rectifying-and-smoothing circuit that rectifies and smoothes the alternating-current voltage stepped down by the step-down unit, and

a connector configured to output an output voltage of the rectifying-and-smoothing circuit,

wherein the connector is coupled to an edge of the planar insulator and includes a connector port that faces a direction parallel to the planar insulator.

2. The wireless power receiver device according to claim 1, wherein the planar insulator comprises a first insulation sheet that covers a first side of the active and passive electrodes and the pair of lead lines and a second insulation sheet that covers a second side of both the active and passive electrodes and the pair of lead lines.

3. The wireless power receiver device according to claim 1, wherein the electrode sheet further comprises a planar shield disposed on a principal surface of the planar insulator, and an insulation sheet is disposed on the shield electrode on a side thereof that is opposite to the insulation sheet.

4. The wireless power receiver device according to claim 1, wherein the electrode sheet and the power receiver are separable.

5. The wireless power receiver device according to claim 4, wherein the power receiver comprise a pair of spring connectors coupled to input wiring of the step-down unit and configured to attach to the pair of lead lines, respectively.

6. The wireless power receiver device according to claim 1, wherein the step-down unit is a transformer.

7. The wireless power receiver device according to claim 1, wherein the planar insulator includes the adhesion property on an outer surface of the planar insulator for connecting the wireless power receiver device to an electronic device to receive the output voltage.

8. The wireless power receiver device according to claim 7, wherein the electrode sheet is configured to be attached to a primary surface of the electronic device, and wherein the connector is positioned to be connected to a port on a side surface of the electronic device that extends orthogonally to the primary surface of the electronic device.

9. The wireless power receiver device according to claim 1, wherein the active and passive electrodes are configured to wirelessly receive power from a power transmission device, and the connector is configured to output the output voltage to an electronic device coupled thereto in response to the active and passive electrodes wirelessly receiving the power from the power transmission device.

10. A wireless power receiver device, comprising:

an electrode sheet including;

an active electrode and a passive electrode that are substantially coplanar,

a pair of lead lines that are coplanar with the active and passive electrodes and extend therefrom, respectively, and

an insulator that covers both sides of the active and passive electrodes and the pair of lead lines; and

a power receiver including;

a step-down unit configured to step down an alternating-current voltage induced between the pair of lead lines,

a rectifying-and-smoothing circuit that rectifies and smoothes the alternating-current voltage stepped down by the step-down unit, and

a connector configured to output an output voltage of the rectifying-and-smoothing circuit,

wherein the insulator includes a first insulation sheet that covers a first side of the active and passive electrodes and the pair of lead lines and also includes a second insulation sheet that covers a second side of both the active and passive electrodes and the pair of lead lines, and

wherein the first insulation sheet is thicker than the second insulation sheet and is disposed adjacent to an electronic device when the electrode sheet is attached to the electronic device.

11. A wireless power receiver device, comprising:

an electrode sheet including;

an active electrode and a passive electrode that are substantially coplanar,

a pair of lead lines that are coplanar with the active and passive electrodes and extend therefrom, respectively, and

a planar insulator that covers both sides of the active and passive electrodes and the pair of lead lines; and

a power receiver including;

a step-down unit configured to step down an alternating-current voltage induced between the pair of lead lines,

a rectifying-and-smoothing circuit that rectifies and smoothes the alternating-current voltage stepped down by the step-down unit, and

a connector configured to output an output voltage of the rectifying-and-smoothing circuit, the connector being coupled to an edge of the planar insulator and including a connector port that extends in a direction non-coplanar with the active and passive electrodes and the planar insulator.

12. The wireless power receiver device according to claim 11, wherein the active and passive electrodes are configured to wirelessly receive power from a power transmission device, and the connector is configured to output the output voltage to an electronic device coupled thereto in response to the active and passive electrodes wirelessly receiving the power from the power transmission device.