TOUCH SCREEN, TOUCH PANEL, AND DISPLAY DEVICE HAVING THE SAME

• US 20130082964A1
• Filed: 10/02/2012
• Published: 04/04/2013
• Est. Priority Date: 10/03/2011
• Status: Active Grant

• Current Assignee: Trivale Technologies, LLC (Vector Capital Corporation)
• Original Assignee: Masafumi Agari
• Inventors: Nakagawa, Naoki, AGARI, Masafumi, Imamura, Takuji, Miyayama, Takashi, Ono, Takeshi, Nakamura, Tatsuya, Mori, Seiichiro
• Granted Patent: US 9,244,575 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

Abstract

A touch screen includes a base substrate, a bundle of rectangular wirings in a column direction including a plurality of detection column wirings that are electrically connected in common, and a bundle of rectangular wirings in a row direction including a plurality of detection row wirings that are electrically connected in common, the bundle of wirings being formed on the base substrate. Also, a plurality of block areas obtained by dividing an intersection area in which the bundle of wirings in the column direction and the bundle of wirings in the row direction intersect in a plan view are defined, and only the detection column wiring or only the detection row wiring is provided in each of the block areas.

Claims

1. A touch screen comprising:

a transparent substrate; and

a bundle of rectangular wirings in a column direction including a plurality of detection column wirings that are electrically connected in common, and a bundle of rectangular wirings in a row direction including a plurality of detection row wirings that are electrically connected in common, said bundle of wirings being formed on said transparent substrate,

wherein a plurality of block areas obtained by dividing an intersection area in which said bundle of wirings in the column direction and said bundle of wirings in the row direction intersect in a plan view are defined, and

only said detection column wiring or only said detection row wiring is provided in each block area.

2. The touch screen according to claim 1, wherein first block areas in said plurality of block areas in each of which only said detection column wiring is provided and second block areas in said plurality of block areas in each of which only said detection row wiring is provided are alternately arranged in a column direction and a row direction.

3. The touch screen according to claim 2, wherein one said detection column wiring that diagonally connects between said first block areas that are diagonally adjacent and one said detection row wiring that diagonally connects between said second block areas that are diagonally adjacent in a complementary manner with said first block areas intersect three-dimensionally in said intersection area.

4. The touch screen according to claim 3, wherein a three-dimensional intersection between said detection column wiring and said detection row wiring is included only at one position in said intersection area.

5. The touch screen according to claim 1,

wherein said detection column wiring in each block area includes:

a first inclined part repeatedly arranged with a predetermined pitch in said column direction and said row direction and inclined at a first angle with respect to said column direction; and

a second inclined part repeatedly arranged with said predetermined pitch in said column direction and said row direction and inclined in a direction opposite to said first inclined part with respect to said column direction, and

said detection row wiring in each block area includes;

a third inclined part repeatedly arranged with said predetermined pitch in said column direction and said row direction and inclined at a second angle with respect to said row direction; and

a fourth inclined part repeatedly arranged with said predetermined pitch in said column direction and said row direction and inclined in a direction opposite to said third inclined part with respect to said row direction.

6. The touch screen according to claim 5, wherein:

said detection column wiring in each block area includes first and second detection column wirings having a line symmetrical relationship, and

said detection row wiring in each block area includes first and second detection row wirings having a line symmetrical relationship.

7. The touch screen according to claim 5, wherein:

said first inclined part and said second inclined part are perpendicular to each other, and

said third inclined part and said fourth inclined part are perpendicular to each other.

8. The touch screen according to claim 5, wherein:

said first inclined part and said second inclined part intersect at a midpoint, and

said third inclined part and said fourth inclined part intersect at a midpoint.

9. The touch screen according to claim 6, wherein:

said detection column wiring in each block area further includes a first branch wiring that connects said first detection column wiring with said second detection column wiring, and

said detection row wiring in each block area further includes a second branch wiring that connects said first detection row wiring with said second detection row wiring.

23. A touch panel comprising:

the touch screen according to claim 1;

a switch circuit configured to sequentially select each of said plurality of bundles of wirings in the column direction and each of said plurality of bundles of wirings in the row direction; and

a detection processing circuit configured to perform a process of calculating touch coordinates in said touch screen indicating a touch position of a pointer that touches said touch screen, based on a result of detecting capacitance formed between said bundle of wirings in the column direction selected by said switch circuit and said pointer, and capacitance formed between said bundle of wirings in the row direction selected by said switch circuit and said pointer.

25. A touch panel comprising:

the touch screen according to claim 1;

a switch circuit configured to sequentially select each of said plurality of bundles of wirings in the column direction and each of said plurality of bundles of wirings in the row direction; and

a detection processing circuit configured to perform a process of calculating touch coordinates in said touch screen indicating a touch position of a pointer, based on a result of detecting a change in mutual-capacitance between said bundle of wirings in the column direction and said bundle of wirings in the row direction selected by said switch circuit according to touch of said pointer to said touch screen.

27. A display device comprising:

the touch panel according to claim 23; and

a display panel mounted on said touch screen of said touch panel.

29. A display device comprising:

the touch panel according to claim 25; and

a display panel mounted on said touch screen of said touch panel.

10. A touch screen comprising:

a transparent substrate;

a bundle of rectangular wirings in a column direction including a plurality of detection column wirings that are electrically connected in common, and a bundle of rectangular wirings in a row direction including a plurality of detection row wirings that are electrically connected in common, said bundle of wirings being formed on said transparent substrate;

a first floating wiring formed in the same wiring layer as said bundle of wirings in the row direction and not connected with said bundle of wirings in the column direction and said bundle of wirings in the row direction; and

a second floating wiring formed in the same wiring layer as said bundle of wirings in the column direction and not connected with said bundle of wirings in the column direction and said bundle of wirings in the row direction,

wherein a plurality of block areas obtained by dividing an intersection area in which said bundle of wirings in the column direction and said bundle of wirings in the row direction intersect in a plan view are defined, and

said detection column wiring and said first floating wiring, or said detection row wiring and said second floating wiring, are provided in each block area.

11. The touch screen according to claim 10, wherein first block areas in said plurality of block areas in each of which said detection column wiring and said first floating wiring are provided and second block areas in said plurality of block areas in each of which said detection row wiring and said second floating wiring are provided are alternately arranged in a column direction and a row direction.

12. The touch screen according to claim 11, wherein one said detection column wiring that diagonally connects between said first block areas that are diagonally adjacent and one said detection row wiring that diagonally connects between said second block areas that are diagonally adjacent in a complementary manner with said first block areas intersect three-dimensionally in said intersection area.

13. The touch screen according to claim 12, wherein three-dimensional intersection between said detection column wiring and said detection row wiring is included only at one position in said intersection area.

14. The touch screen according to claim 10,

wherein said detection column wiring in each block area includes:

a first inclined part repeatedly arranged with a predetermined pitch in said column direction and said row direction and inclined at a first angle with respect to said column direction; and

a second inclined part repeatedly arranged with said predetermined pitch in said column direction and said row direction and inclined in a direction opposite to said first inclined part with respect to said column direction,

said detection row wiring in each block area includes;

a third inclined part repeatedly arranged with said predetermined pitch in said column direction and said row direction and inclined at a second angle with respect to said row direction; and

a fourth inclined part repeatedly arranged with said predetermined pitch in said column direction and said row direction and inclined in a direction opposite to said third inclined part with respect to said row direction,

said first floating wiring in each block area includes inclined parts similar to said first and second inclined parts, and

said second floating wiring in each block area includes inclined parts similar to said third and fourth inclined parts.

15. The touch screen according to claim 14, wherein:

said detection column wiring in each block area includes first and second detection column wirings having a line symmetrical relationship,

said detection row wiring in each block area includes first and second detection row wirings having a line symmetrical relationship,

said first floating wiring in each block area includes first and second partial floating wirings having a line symmetrical relationship, and

said second floating wiring in each block area includes third and fourth partial floating wirings having a line symmetrical relationship.

16. The touch screen according to claim 14, wherein:

said first inclined part and said second inclined part are perpendicular to each other, and

said third inclined part and said fourth inclined part are perpendicular to each other.

17. The touch screen according to claim 14, wherein:

said first inclined part and said second inclined part intersect at a midpoint, and

said third inclined part and said fourth inclined part intersect at a midpoint.

18. The touch screen according to claim 15, wherein:

said detection column wiring in each block area further includes a first branch wiring that connects said first detection column wiring with said second detection column wiring,

said detection row wiring in each block area further includes a second branch wiring that connects said first detection row wiring with said second detection row wiring,

said first floating wiring in each block area further includes a third branch wiring that connects said first partial floating wiring with said second partial floating wiring, and

said second floating wiring in each block area further includes a fourth branch wiring that connects said third partial floating wiring with said fourth partial floating wiring.

19. The touch screen according to claim 11, comprising, in a boundary between two said adjacent block areas, a first dummy wiring formed in a separation portion between a first end part of said detection column wiring or the second floating wiring provided in one of said adjacent block areas and a second end part of said detection column wiring or said second floating wiring provided in the other block area, the first dummy wiring being formed in a different wiring layer from said first and second end parts.

20. The touch screen according to claim 19, wherein both end parts of said first dummy wiring partially overlap with said first and second end parts in a plan view, respectively.

21. The touch screen according to claim 11, comprising, in a boundary between two said adjacent block areas, a second dummy wiring formed in a separation portion between a third end part of said detection row wiring or the first floating wiring provided in one of said adjacent block areas and a fourth end part of said detection row wiring or said first floating wiring provided in the other block area, the second dummy wiring being formed in a different wiring layer from said third and fourth end parts.

22. The touch screen according to claim 21, wherein both end parts of said second dummy wiring partially overlap with said third and fourth end parts in a plan view, respectively.

24. A touch panel comprising:

the touch screen according to claim 10;

a switch circuit configured to sequentially select each of said plurality of the bundle of wirings in the column direction and each of said plurality of the bundle of wirings in the row direction; and

a detection processing circuit configured to perform a process of calculating touch coordinates in said touch screen indicating a touch position of a pointer that touches said touch screen, based on a result of detecting capacitance formed between said bundle of wirings in the column direction selected by said switch circuit and said pointer, and capacitance formed between said bundle of wirings in the row direction selected by said switch circuit and said pointer.

26. A touch panel comprising:

the touch screen according to claim 10;

a switch circuit configured to sequentially select each of said plurality of bundles of wirings in the column direction and each of said plurality of bundles of wirings in the row direction; and

a detection processing circuit configured to perform a process of calculating touch coordinates in said touch screen indicating a touch position of a pointer, based on a result of detecting a change in mutual-capacitance between said bundle of wirings in the column direction and said bundle of wirings in the row direction selected by said switch circuit according to touch of said pointer to said touch screen.

28. A display device comprising:

the touch panel according to claim 24; and

a display panel mounted on said touch screen of said touch panel.

30. A display device comprising:

the touch panel according to claim 26; and

a display panel mounted on said touch screen of said touch panel.