TOUCH SENSING DEVICE

• US 20120019450A1
• Filed: 07/26/2010
• Published: 01/26/2012
• Est. Priority Date: 07/26/2010
• Status: Active Grant

• Current Assignee: AU Optronics Corporation
• Original Assignee: AU Optronics Corporation
• Inventors: Lee, Seok Lyul, Huang, Kung-Chieh, Chou, Shih-Po
• Granted Patent: US 8,717,312 B2
• Time in Patent Office: Days
• US Class Current: 345/173
• 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
• CPC Class Codes: G06F 3/0448 Details of the electrode shape, e.g. for enhancing the detection of touches, for generating specific electric field shapes, for enhancing display quality

Abstract

The present invention relates to a touch sensing device. In one embodiment, the touch sensing device includes a plurality of first touch electrodes and a plurality of second touch electrodes, alternately arranged along a first direction and a second direction substantially perpendicular to the first direction to form a sensing matrix, such that each first touch electrode and a corresponding second touch electrode are entangled each other along with at least one of the first and second directions.

Claims

1. A touch sensing device, comprising:

a substrate having a plurality of first sensing regions and a plurality of second sensing regions arranged in a matrix;

a plurality of first touch electrodes, alternately arranged along a first direction, each of the first touch electrodes including a plurality of first sensing pads, each of the first sensing pads having a first sensing portion disposed in a corresponding first sensing region and a first complementary portion disposed in a corresponding second sensing region; and

a plurality of second touch electrodes, alternately arranged along a second direction substantially perpendicular to the first direction to form a sensing matrix, each of the second touch electrodes including a plurality of second sensing pads, each of the second sensing pads having a second sensing portion disposed in a corresponding second sensing region and a second complementary portion disposed in a corresponding first sensing region.

2. The touch sensing device of claim 1, wherein a shape of the first complementary portion and the second complementary portion comprises a triangle or a rhombus.

3. The touch sensing device of claim 1, wherein the plurality of first touch electrodes and the plurality of second touch electrodes are electrically insulated from one another.

4. The touch sensing device of claim 1, wherein the first sensing pads of each of the first touch electrodes are electrically connected to each other in series, and the second sensing pads of each of the second touch electrodes are electrically connected to each other in series.

5. The touch sensing device of claim 1, wherein each of the first sensing pads is identical to or substantially different from each of the second sensing pads.

6. The touch sensing device of claim 1, wherein each of the first sensing pads has a shape of a polygon with more than four sides, and each of the second sensing pads has a shape of a polygon with more than four sides.

7. The touch sensing device of claim 1, wherein the first sensing pads and the second sensing pads are disposed along the first direction and the second direction, respectively, such that each of the first sensing pads is surrounded by four second sensing pads and vice versus.

8. The touch sensing device of claim 1, wherein each short side of each of the first sensing pads is closest to and faces one shortest side of each of the second sensing pads correspondingly.

9. The touch sensing device of claim 1, wherein each of the first sensing pads further comprises at least one first extension portion extended to another first sensing pad adjacent thereto, and each of the second sensing pads further comprises at least one second extension portion extended to another second sensing pad adjacent thereto.

10. The touch sensing device of claim 9, wherein each of the first sensing pads comprises at least one first recesses corresponding to the at least one first extension portion, and each of the second sensing pads comprises at least one second recesses corresponding to the at least one second extension portion.

11. The touch sensing device of claim 1, wherein the first and second sensing pads are disposed such that each first sensing pad and the corresponding second sensing pad are substantially complementary to each other, and are entangled each other along with the first and second directions

12. The touch sensing device of claim 11, wherein each of the first sensing pads and each of the second sensing pads are formed symmetrically along the first and second directions and have a polygon structure that is substantially complementary to each other.

13. The touch sensing device of claim 1, wherein each of the first sensing pads and each of the second sensing pads are substantially identical to each other and comprise a star-like structure having a rectangular body and four rectangular members, each rectangular member protruded from a corresponding side, respectively, of the rectangular body, such that when disposed, each first sensing pad and a corresponding second sensing pad are entangled each other along with the first and second directions.

14. The touch sensing device of claim 1, wherein each of the first touch electrodes and the second touch electrodes respectively is formed of a conductive material.

15. A touch sensing device, comprising:

a plurality of first touch electrodes, each first touch electrode having a plurality of first sensing pads, and a plurality of second touch electrodes, each second touch electrode having a plurality of second sensing pads, alternately arranged along a first direction and a second direction substantially perpendicular to the first direction to form a sensing matrix, such that each first sensing pad and a corresponding second sensing pad are entangled each other along with at least one of the first and second directions.

16. The touch sensing device of claim 15, wherein the plurality of first touch electrodes and the plurality of second touch electrodes are electrically insulated from one another.

17. The touch sensing device of claim 16, wherein the first sensing pads of each of the first touch electrodes are electrically connected to each other in series, and the second sensing pads of each of the second touch electrodes are electrically connected to each other in series.

18. The touch sensing device of claim 17, wherein each of the first sensing pads is identical to or substantially different from each of the second sensing pads.

19. The touch sensing device of claim 18, wherein each of the first sensing pads is of a polygon with more than four sides, and each of the second sensing pads is of a polygon with more than four sides.

20. The touch sensing device of claim 19, wherein each of the first sensing pads is a hexagon with two isosceles triangles oriented such that the vertex of one isosceles triangle is opposite to the vertex of the other isosceles triangle, and the base sides of the two isosceles triangles are partially overlapped so that the hexagon has four long sides with an equal first length, L1, and two short sides with an equal second length, L2<

L1, and each side parallel to its corresponding opposite side, wherein each short side defines an angle, α

, relative to two adjacent long sides, respectively.

21. The touch sensing device of claim 20, wherein each of the second sensing pads is a hexagon having two longest sides with an equal first length, J1, and two shortest sides with an equal second length, J2<

J1, and each side parallel to its corresponding opposite side, wherein each shortest side defines an angle, β

, relative to two adjacent sides, respectively, wherein the angles α and

β

are complementary to each other, J1=L2 and J2=L2.

22. The touch sensing device of claim 21, wherein the first sensing pads and the second sensing pads are disposed along the first direction and the second direction, respectively, such that each of the first sensing pads and the corresponding second sensing pads are entangled each other along with the second direction, and each of the first sensing pads is surrounded by four second sensing pads and vice versus.

23. The touch sensing device of claim 22, wherein each short side of the first sensing pad is closest to and faces one shortest side of the second sensing pad correspondingly.

24. The touch sensing device of claim 19, wherein each of the first sensing pads comprises a plurality of first sensing portions forming a diamond-shaped polygon, at least one first complementary portion and at least one first extension portion formed at corresponding vertexes of the diamond-shaped polygon along one of the first and second directions, wherein each of the at least one first complementary portion and the at least one first extension portion is characterized with a dagger-like polygon, and wherein the plurality of first sensing portions defines a plurality of recesses having geometric shapes substantially complementary to the at least one first complementary portion and the at least one first extension portion.

25. The touch sensing device of claim 24, wherein each of the second sensing pads comprises a plurality of second sensing portions forming a diamond-shaped polygon, at least one second complementary portion and at least one second extension portion formed at corresponding vertexes of the diamond-shaped polygon along the other of the first and second directions, wherein each of the at least one second complementary portion and the at least one second extension portion is characterized with a dagger-like polygon, and wherein the plurality of second sensing portions defines a plurality of recesses having geometric shapes substantially complementary to the at least one second complementary portion and the at least one second extension portion.

26. The touch sensing device of claim 25, wherein the first and second sensing pads are disposed such that each first sensing pad and the corresponding second sensing pad are substantially complementary to each other, and are entangled each other along with the first and second directions.

27. The touch sensing device of claim 19, wherein each of the first sensing pads and each of the second sensing pads are substantially identical to each other and comprises a star-like structure having a rectangular body and four rectangular members, each rectangular member protruded from a corresponding side, respectively, of the rectangular body, such that when disposed, each first sensing pad and a corresponding second sensing pad are entangled each other along with the first and second directions.

28. The touch sensing device of claim 19, wherein each of the first sensing pads is formed symmetrically along the first and second directions and has an I-like structure along the first direction, a pair of polygon structures symmetrically extended from the middle portion of the I-like structure alone the second direction, and a pair of triangular tips symmetrically extending the pair of polygon structures, respectively, alone the second direction.

29. The touch sensing device of claim 28, wherein each of the second sensing pads is formed symmetrically along the first and second directions and has a polygon structure that is substantially complementary to each of the first sensing pads.

30. The touch sensing device of claim 29, wherein the first and second sensing pads are disposed such that each first sensing pad and the corresponding second sensing pad are substantially complementary to each other, and are entangled each other along with the first and second directions.

31. The touch sensing device of claim 15, wherein each of the plurality of first touch electrodes and the plurality of second touch electrodes respectively is formed of a conductive material.