Touch panel and display apparatus provided with same

• US 8,803,827 B2
• Filed: 04/20/2010
• Issued: 08/12/2014
• Est. Priority Date: 05/11/2009
• Status: Active Grant

• Current Assignee: Kyocera Corporation
• Original Assignee: Kyocera Corporation
• Inventors: Nozawa, Junichi
• Primary Examiner(s): Nguyen, Kevin M
• Assistant Examiner(s): Lee, Jr., Kenneth B
• Application Number:
  US13/319,508
• Publication Number:
  US 20120050201A1
• Time in Patent Office: 1,575 Days
• Field of Search: 345173-182
• US Class Current: 345/173
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/133615 Edge-illuminating devices, i.e. illuminating from the side
• CPC Class Codes: G06F 3/04164 Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
• CPC Class Codes: G06F 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact

Abstract

According to one aspect of the present invention, a touch panel includes: a first base including a first detection electrode and being transparent to light; a second base including a second detection electrode that oppose the first detection electrode, and being transparent to light; a first wiring electrically connected to the first detection electrode; and a second wiring electrically connected to the second detection electrode. The first wiring includes: a first wiring electrode provided on the first base; and a first auxiliary electrode provided on the second base so as to oppose the first wiring electrode. The first wiring electrode and the first auxiliary electrode are electrically connected to each other via a conductive adhesive member.

Claims

1. A touch panel comprising:

a first base including a first detection electrode and being transparent to light;

a second base including a second detection electrode that oppose the first detection electrode, and being transparent to light;

a first wiring electrically connected to the first detection electrode; and

a second wiring electrically connected to the second detection electrode, wherein

the first wiring includes;

a first wiring electrode provided on the first base; and

a first auxiliary electrode provided on the second base so as to oppose the first wiring electrode, and

the second wiring includes;

a second wiring electrode provided on the first base; and

a second auxiliary electrode, a portion of the second auxiliary electrode being provided on the second detection electrode of the second base so as to oppose the second wiring electrode,

the first wiring electrode and the first auxiliary electrode are electrically connected to each other via a conductive adhesive member, and

the second wiring electrode and the second auxiliary electrode are electrically connected to each other via a conductive adhesive member.

2. The touch panel according to claim 1, wherein the first auxiliary electrode is provided in a region where the conductive adhesive member is provided and is provided along the entire first wiring electrode located on the region.

3. The touch panel according to claim 1, wherein the first auxiliary electrode is made of a material same as that of the first wiring electrode.

4. The touch panel according to claim 1, wherein the second auxiliary electrode is provided in a region where the conductive adhesive member is provided and is provided along the entire second wiring electrode located on the region.

5. The touch panel according to claim 1, wherein the second auxiliary electrode is made of a material same as that of the second wiring electrode.

6. The touch panel according to claim 1, wherein

a clearance between the first base and the second base decreases from a center of the first base toward an end of the first base as viewed in a plane,

at least a portion of the first wiring electrode and at least a portion of the second wiring electrode are formed into a comb-like shape as viewed in a plane, and

the portion of the first wiring electrode formed into the comb-like shape and the portion of the second wiring electrode formed into the comb-like shape are engaged with each other with a predetermined gap therebetween.

7. The touch panel according to claim 6, wherein the portion of the first auxiliary electrode that opposite the portion of the first wiring electrode formed into the comb-like shape is formed into a comb-like shape as viewed in a plane.

8. The touch panel according to claim 6, wherein the portion of the second auxiliary electrode that opposite the portion of the second wiring electrode formed into the comb-like shape is formed into a comb-like shape.

9. The touch panel according to claim 6, wherein a window is formed on at least one of the portion of the first wiring electrode formed into the comb-like shape and the portion of the second wiring electrode formed into the comb-like shape.

10. The touch panel according to claim 1, wherein a support member is provided between the first base and the second base.

11. The touch panel according to claim 1, wherein the first wiring and the second wiring are made of a thin metal film.

12. The touch panel according to claim 11, wherein the thin metal film is an aluminum film, an aluminum alloy film, a laminated film of a chrome film and an aluminum film, or a laminated film of a chrome film and an aluminum alloy film.

13. A display apparatus comprising:

the touch panel according to claim 1; and

a display panel arranged opposite the touch panel.

14. The display apparatus according to claim 13, wherein the display panel is a liquid crystal display panel.