Proximity detection device

• US 11,068,098 B2
• Filed: 04/20/2020
• Issued: 07/20/2021
• Est. Priority Date: 02/28/2012
• Status: Active Grant

• Current Assignee: Japan Display Incorporated
• Original Assignee: Japan Display Incorporated
• Inventors: Adachi, Koichiro
• Primary Examiner(s): Sharifi-Tarfreshi, Koosha
• Application Number:
  US16/852,937
• Publication Number:
  US 20200241669A1
• Time in Patent Office: 456 Days
• Field of Search: 345173, 345174
• CPC Class Codes: G06F 2203/04108 Touchless 2D- digitiser, i.e. digitiser detecting the X/Y position of the input means, finger or stylus, also when it does not touch, but is proximate to the digitiser's interaction surface without distance measurement in the Z direction
• CPC Class Codes: G06F 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes

Abstract

A proximity detection device is provided and includes detection electrodes including a pair of extending portions that extends in a first direction; and a pair of connector portions that extends in a second direction intersecting the first direction, each of the pair of connector portions electrically connecting an end of one of the pair of extending portions to an end of the other one of the pair of extending portions, and a first dummy pattern portion surrounded by the pair of extending portions and the pair of connector portions, wherein the extending portions has a slit of bending lines having a slit bending angle, wherein the first dummy pattern portion is divided by first gaps of bending lines having a first bending angle, and wherein the slit bending angle and the first bending angle are the same.

Claims

1. A proximity detection device comprising:

a plurality of detection electrodes each of which including;

a pair of extending portions that extends in a first direction; and

a pair of connector portions that extends in a second direction intersecting the first direction, each of the pair of connector portions electrically connecting an end of one of the pair of extending portions to an end of the other one of the pair of extending portions, and

a first dummy pattern portion surrounded by the pair of extending portions and the pair of connector portions,

wherein each of the extending portions has a slit of bending lines having a slit bending angle,

wherein the first dummy pattern portion is divided by first gaps of bending lines having a first bending angle, and

wherein the slit bending angle and the first bending angle are the same.

2. The proximity detection device according to claim 1,

wherein the first dummy pattern portion is divided by a second gap having a second bending angle different from the slit bending angle and the first bending angle.

3. The proximity detection device according to claim 1,

wherein the first dummy pattern portion is divided by a second gap that communicates the first gaps.

4. The proximity detection device according to claim 1, further comprising:

a second dummy pattern portion arranged between two detection electrodes,

wherein the second dummy pattern portion is divided by third gaps of bending lines having the first bending angle.

5. The proximity detection device according to claim 1,

wherein the extending portions, the slit, and the first gaps have a zigzag shape.

6. The proximity detection device according to claim 4,

wherein the extending portions, the slit, the first gaps, and the third gaps have a zigzag shape.

7. The proximity detection device according to claim 4,

wherein the second dummy pattern portion is divided by a fourth gap having a second bending angle different from the first and the first bending angle.

8. The proximity detection device according to claim 4,

wherein the second dummy pattern portion is divided by a fourth gap that communicates the third gaps.

9. The proximity detection device according to claim 1, further comprising:

a driving electrodes intersecting the first electrodes to form a capacitances at intersections of detection electrodes and driving electrodes.

10. A display device comprising:

a display panel which has a display image surface in which a plurality of pixels are arranged in a matrix shape; and

a detecting device in which a plurality of detection electrodes for proximity operation detection are arranged to form an operation surface at a position superposed on the display image surface,

wherein each of the detection electrodes including;

a pair of extending portions that extends in a first direction; and

a pair of connector portions that extends in a second direction intersecting the first direction, each of the pair of connector portions electrically connecting an end of one of

the pair of extending portions to an end of the other one of the pair of extending portions, and

a first dummy pattern portion that is surrounded by the pair of extending portions and the pair of connector portions,

wherein each of the extending portions has a slit of bending lines having a slit bending angle,

wherein the first dummy pattern portion is divided by first haps of bending lines having a first bending angle, and

wherein the slit bending angle and the first bending angle are the same.

11. The proximity detection device according to claim 10,

wherein the first dummy pattern portion is divided by a second gap having a second bending angle different from the slit bending angle and the first bending angle.

12. The proximity detection device according to claim 10,

wherein the first dummy pattern portion is divided by a second gap that communicates the first gaps.

13. The proximity detection device according to claim 11, further comprising:

a second dummy pattern portion arranged between two detection electrodes,

wherein the second dummy pattern portion is divided by third gaps of bending lines having the first bending angle.

14. The proximity detection device according to claim 10,

wherein the extending portions, the slit, and the first gaps have a zigzag shape.

15. The proximity detection device according to claim 13,

wherein the extending portions, the slit, the first gaps, and the third gaps have a zigzag shape.

16. The proximity detection device according to claim 13,

wherein the second dummy pattern portion is divided by a fourth gap having a second bending angle different from the slit bending angle and the first bending angle.

17. The proximity detection device according to claim 14,

wherein the second dummy pattern portion is divided by a fourth gap that communicates the third gaps.

18. The proximity detection device according to claim 10, further comprising:

a plurality of driving electrodes intersecting the first electrodes to form capacitances at intersections of detection electrodes and driving electrodes.

19. The proximity detection device according to claim 10, wherein

each of the pixels includes a plurality of pixel electrodes and a plurality of common electrodes to form an electro-magnetic field for displaying an image,

wherein the common electrodes intersects the detection electrodes to form capacitances at intersections of the detection electrodes and the common electrodes for detecting an external object with mutual capacitive sensing method.