Comb-structured shielding layer and wireless charging transmitter thereof

• US 9,192,080 B2
• Filed: 11/27/2012
• Issued: 11/17/2015
• Est. Priority Date: 04/03/2012
• Status: Active Grant

• Current Assignee: Lite-On Technology Corporation
• Original Assignee: Lite-On Technology Corporation, Novero Dabendorf GmbH
• Inventors: Scholz, Frank, Graf, Stefan, Waldschmidt, Andre, Lindenstruth, Lars, Jung, Marco
• Primary Examiner(s): Tso, Edward
• Application Number:
  US13/685,713
• Publication Number:
  US 20130257366A1
• Time in Patent Office: 1,085 Days
• Field of Search: 320/107, 320/108, 320/114, 336/84.R, 336/84.M
• US Class Current: 1/1
• CPC Class Codes: H01F 27/36 Electric or magnetic shields or screens movable for varying inductance H01F21/10
• CPC Class Codes: H01F 27/363 made of electrically conductive material
• CPC Class Codes: H02J 2310/22 The load being a portable electronic device
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 7/0042 characterised by the mechanical construction
• CPC Class Codes: H05K 1/0218 by printed shielding conductors, ground planes or power plane H05K1/0236 takes precedence
• CPC Class Codes: H05K 1/0224 Patterned shielding planes, ground planes or power planes H05K1/0253 takes precedence
• CPC Class Codes: H05K 1/0227 Split or nearly split shielding or ground planes
• CPC Class Codes: H05K 2201/09254 Branched layout

Abstract

A comb-structured shielding layer and a wireless charging transmitter thereof are provided. The wireless charging module is connected to a power source, has at least one wireless charging coil and at least one comb-structured shielding layer, and is configured to convert alternative current power from the power source to H-field electromagnetic radiations, and wirelessly charges an electronic device. The comb-structured shielding layer is disposed between the wireless charging module and the target electronic device and configured to allow the H-field electromagnetic radiations pass through. The comb-structured shielding layer includes a first area and a second area. The first area is electrically connected to a reference electric potential. The second area is electrically connected to the reference electric potential through the first area, and is configured to shield the E-field electromagnetic radiations but allow the H-field electromagnetic radiations pass through the comb-structured shielding layer.

Claims

1. A comb-structured shielding layer, disposed between a wireless charging module and a target electronic device and completely covering the wireless charging module, comprising:

a first area, electrically connected to a reference electric potential; and

a second area, electrically connected to the reference electric potential through the first area, being a comb-shape area, configured to shield E-field electromagnetic radiations but allow magnetic H-field electromagnetic radiations associated with the E-field electromagnetic radiations pass through the comb-structured shielding layer.

2. The comb-structured shielding layer of claim 1, wherein the first area and the second area are both printed on a non-conductive material board.

3. The comb-structured shielding layer of claim 1, wherein the first area and the second area are both conductive materials.

4. The comb-structured shielding layer of claim 1, wherein the comb-shape area of the second area is configured with a plurality of parallel segments, and the parallel segments are spaced by non-conductive materials.

5. The comb-structured shielding layer of claim 4, wherein each one of the parallel segments is configured with an inclined angle between a reference line of the comb-structured shielding layer and the each one of the parallel segments.

6. The comb-structured shielding layer of claim 4, wherein each one of the parallel segments is configured with a corrugated shape but the parallel segments do not cross any other parallel segments.

7. A wireless charging transmitter, comprising:

a wireless charging module, connected to an external power source, having at least one wireless charging coil, configured to convert alternative current power from the external power source to magnetic H-field electromagnetic radiations, and wirelessly charges a target electronic device; and

at least one comb-structured shielding layer, disposed between the wireless charging module and the target electronic device and completely covering the wireless charging module, configured to allow the magnetic H-field electromagnetic radiations pass through the at least one comb-structured shielding layer.

8. The wireless charging transmitter of claim 7, wherein the at least one comb-structured shielding layer is configured to shield the target electronic device from E-field electromagnetic radiations associated with the magnetic H-field electromagnetic radiations.

9. The wireless charging transmitter of claim 7, wherein each one of the at least one comb-structured shielding layer comprises:

a first area, electrically connected to a reference electric potential; and

a second area, electrically connected to the reference electric potential through the first area, being a comb-shape area, configured to shield the E-field electromagnetic radiations but allow the magnetic H-field electromagnetic radiations pass through the comb-structured shielding layer.

10. The wireless charging transmitter of claim 9, wherein the first area and a second area are both printed on a non-conductive material board.

11. The wireless charging transmitter of claim 9, wherein the first area and the second area are both conductive materials.

12. The wireless charging transmitter of claim 9, wherein the comb-shape area of the second area is configured with a plurality of parallel segments, and the parallel segments are spaced by non-conductive materials.

13. The wireless charging transmitter of claim 12, wherein each one of the parallel segments are configured with an inclined angle between a reference line of the comb-structured shielding layer and the each one of the parallel segments.

14. The wireless charging transmitter of claim 12, wherein each one of the parallel segments is configured with a corrugated shape but the parallel segments do not cross any other parallel segments.

15. The wireless charging transmitter of claim 12, wherein the comb-structured shielding layer includes a first comb-structured shielding layer and a second comb-structured shielding layer disposed between a non-conductive layer, and a first orientation of the parallel segments on first comb-structured shielding layer and a second orientation of the parallel segments on second comb-structured shielding layer are orthogonal to each other.