TOUCH PANEL, ELECTRO OPTICAL DEVICE, AND ELECTRONIC APPARATUS

• US 20090096754A1
• Filed: 07/15/2008
• Published: 04/16/2009
• Est. Priority Date: 10/12/2007
• Status: Active Grant

• Current Assignee: 138 East LCD Advancements Limited (Vector Capital Corporation)
• Original Assignee: Epson Imaging Devices Corporation (Seiko Group)
• Inventors: HINATA, Shoji
• Granted Patent: US 8,022,939 B2
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G06F 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact

Abstract

There is provided a touch panel including a first substrate, a second substrate opposing the first substrate, a first electrode film formed on the first substrate, a second electrode film formed on the second substrate, the second electrode film opposing the first electrode film. An openings is formed in each of the first electrode film and the second electrode film, and the opening formed in the first electrode film and the opening formed in the second electrode film are overlapped in plan view and each of the openings has a different opening area.

Claims

1. A touch panel comprising:

a first substrate;

a second substrate opposing the first substrate;

a first electrode film formed on the first substrate;

a second electrode film formed on the second substrate, the second electrode film opposing the first electrode film, wherein

an openings is formed in each of the first electrode film and the second electrode film, and the opening formed in the first electrode film and the opening formed in the second electrode film are overlapped in plan view and each of the openings has a different opening area.

2. The touch panel according to claim 1, wherein a plurality of the openings are formed in each of the first electrode film and the second electrode film.

3. The touch panel according to claim 1, wherein an opening range of one of the openings is smaller than an opening range of the other opening, and the opening range of the one of the openings is included in the opening range of the other opening.

4. The touch panel according to claim 3, wherein shapes of the one of the openings and the other opening are similar to each other.

5. The touch panel according to claim 3, wherein the second substrate is to be pressed among the first substrate and the second substrate, and an opening area of the opening formed in the first electrode film is smaller than an opening area of the opening formed in the second electrode film.

6. The touch panel according to claim 5, wherein the second substrate includes a flexible base material, and the first substrate is harder than the second substrate.

7. The touch panel according to claim 2, wherein an opening range of one of the openings formed in the first substrate is included in an opening range of one of the openings formed in the second substrate, and an opening range of another opening formed in the second substrate is included in an opening range of another opening formed in the first substrate.

8. The touch panel according to claim 1, wherein a reflection preventing film is formed on at least one of the openings.

9. The touch panel according to claim 1, wherein a spacer is disposed so as to correspond to the opening formed in the first electrode film or the opening formed in the second electrode film.

10. The touch panel according to claim 9, wherein the spacer is disposed at a position at which the opening formed in the first electrode film and the opening formed in the second electrode film are overlapped in plan view.

14. An electro optical device, wherein

the touch panel according to claim 1 is disposed so as to overlap with a display region.

11. A touch panel comprising:

a first substrate;

a second substrate opposing the first substrate;

a first electrode film formed on the first substrate;

a second electrode film formed on the second substrate, the second electrode film opposing the first electrode film, wherein

an opening is formed in at least one of the first electrode film and the second electrode film, and a spacer is disposed so as to correspond to the opening.

12. The touch panel according to claim 11, wherein the opening is formed in each of the first electrode film and the second electrode film, and the spacer is disposed at a position at which the opening formed in the first electrode film and the opening formed in the second electrode film are overlapped in plan view.

13. The touch panel according to claim 12, wherein

an opening area of the opening formed in the first electrode film is smaller than an opening area of the opening formed in the second electrode film, and

the spacer is provided at the first substrate side.

15. An electro optical device in which a touch panel is disposed so as to overlap with a display region in which a plurality of dots or pixels are arranged, wherein the touch panel includes

a first substrate,

a second substrate opposing the first substrate,

a first electrode film formed on the first substrate,

a second electrode film formed on the second substrate, the second electrode film opposing the first electrode film, and wherein

a plurality of openings are arranged in at least one of the first electrode film and the second electrode film, and an arrangement pitch of the plurality of dots or pixels and an arrangement pitch of the plurality of openings are different.

16. An electronic apparatus mounting the electro optical device according to claim 15.