Touch window having improved electrode pattern structure

Patent metadata

Field	Value
Publication number	US-9496097-B2
Application number	US-201313930655-A
Country	US
Kind code	B2
Filing date	Jun 28, 2013
Priority date	Jun 29, 2012
Publication date	Nov 15, 2016
Grant date	Nov 15, 2016

Abstract

Disclosed is a touch window. The touch window includes a cover window, a first sensing electrode layer formed on a view area (V/A) of the cover window and including a first electrode pattern including a first unit cell electrode pattern, and a second sensing electrode layer formed on the view area and including a second electrode pattern which crosses the first electrode pattern and includes a second unit cell electrode pattern. A ratio of an area of the space part between a first unit cell electrode pattern and a second unit cell electrode pattern adjacent to the first unit cell electrode pattern with respect to an area of the first unit cell electrode pattern of the first electrode pattern or the second unit cell electrode pattern of the second electrode pattern is in the range of 10% to 20%.

First claim

What is claimed is:

1. A touch window comprising:
a cover window;
a first sensing electrode layer formed on a view area (V/A) of the cover window and comprising a first electrode pattern comprising a first unit cell electrode pattern;
a second sensing electrode layer formed on the view area and comprising a second electrode pattern which crosses the first electrode pattern and comprises a second unit cell electrode pattern;
a space part between the first unit cell electrode pattern and the second unit cell electrode pattern adjacent to the first unit cell electrode pattern;
a first lead electrode connecting first unit cell electrode patterns to each other;
a second lead electrode connecting second unit cell electrode patterns to each other; and
a pattern layer formed in the space part and having a dummy pattern where a touch input is not received;
wherein a ratio of an area of the space part to an area of the first unit cell electrode pattern or the second unit cell electrode pattern is in a range of 10% to 20% such that the first electrode pattern or the second electrode pattern is not visible to a naked eye;
wherein the first sensing electrode layer and the second sensing electrode layer are both disposed on the same surface of the cover window;
wherein the first lead electrode is integrally formed with the first unit cell electrode patterns, and the second lead electrode is integrally formed with the second unit cell electrode patterns;
wherein a width of the first lead electrode corresponds to a width of the second lead electrode; and
wherein a width of the space part is 30 μm or less.

2. The touch window of claim 1 , wherein the dummy pattern of the pattern layer comprises at least one of polyethylene terephthalate (PET), polycarbonate (PC), polyether sulfone (PES), polyimide (PI), and polymethyl methacrylate (PMMA).

3. The touch window of claim 1 ,
wherein a length of the first lead electrode or a length of the second lead electrode is in a range of 1 μm to 30 μm.

4. The touch window of claim 3 , wherein the width of the space part is different from the width of the first lead electrode.

5. A touch window comprising:
a cover window;
a first sensing electrode layer formed on a view area (V/A) of the cover window and comprising a first electrode pattern comprising a first unit cell electrode pattern;
a second sensing electrode layer formed on the view area and comprising a second electrode pattern which crosses the first electrode pattern and comprises a second unit cell electrode pattern;
a space part between the first unit cell electrode pattern and the second unit cell electrode pattern adjacent to the first unit cell electrode pattern; and
a pattern layer formed in the space part and having a dummy pattern where a touch input is not received;
wherein the dummy pattern is disposed on the view area of the cover window;
wherein the first sensing electrode layer, the second sensing electrode layer, and the dummy pattern all comprise the same material;
wherein a ratio of an area of the space part to an area of the first unit cell electrode pattern or the second unit cell electrode pattern is in a range of 10% to 20%;
wherein the first lead electrode is integrally formed with the first unit cell electrode patterns and the second lead electrode is integrally formed with the second unit cell electrode patterns;
wherein a width of the first lead electrode corresponds to a width of the second lead electrode; and
wherein a width of the space part is 30 μm or less.

6. The touch window of claim 5 , wherein the dummy pattern of the pattern layer comprises at least one of indium-tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), carbon nano-tube (CNT), graphene, silver nano-wire (AgNW), and conductive polymer.

7. The touch window of claim 5 , wherein the first sensing electrode layer comprises the first electrode pattern directly formed on the cover window, and the second sensing electrode layer comprises the second electrode pattern formed on a base substrate bonded to the first sensing electrode layer through an adhesive layer.

8. The touch window of claim 5 , wherein the first and second sensing electrode layers comprise the first and second electrode patterns formed on one surface of a base substrate bonded to the cover window and a surface of the base substrate opposite to the one surface, respectively.

9. The touch window of claim 5 , wherein the first sensing electrode layer comprises the first electrode pattern on a first base substrate bonded to one surface of the cover window, and the second sensing electrode layer comprises the second electrode pattern on a second base substrate bonded to an opposite surface of the first sensing electrode layer through an adhesive layer.

10. The touch window of claim 5 , wherein the first and second sensing electrode layers comprise the first and second electrode patterns on one surface of the cover window, respectively.

11. The touch window of claim 5 , wherein the first sensing electrode layer comprises the first electrode pattern on one surface of a second cover window different from the cover window, and the second sensing electrode layer comprises the second electrode pattern on a surface of the second cover window opposite to the one surface of the second cover window.

Assignees

• Lg Innotek Co Ltd

Inventors

• Lee Keun Sik

Classifications

• G06F3/041 Primary

  Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means · CPC title

• H01H1/06 Primary

  characterised by the shape or structure of the contact-making surface, e.g. grooved · CPC title

• G06F2203/04103

  Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices · CPC title

• G02F1/13338

  Input devices, e.g. touch panels · CPC title