Touch panel

Patent metadata

Field	Value
Publication number	US-9104280-B2
Application number	US-201313845486-A
Country	US
Kind code	B2
Filing date	Mar 18, 2013
Priority date	Dec 27, 2012
Publication date	Aug 11, 2015
Grant date	Aug 11, 2015

Abstract

Disclosed herein is a touch panel. In the touch panel, electrode patterns included in the touch panel may be orthogonal to each other in an intersecting point, and formed of a combination of unit patterns having a bent straight line shape. Accordingly, it is possible to prevent a contact area of the electrode patterns that intersect in the intersecting point from being increasing, thereby reducing visibility of the electrode pattern.

First claim

What is claimed is:

1. A touch panel comprising:
a transparent substrate; and
a plurality of electrode patterns that are formed on the transparent substrate so as to be formed in a mesh shape, and are orthogonal to each other in an intersecting point,
wherein the electrode pattern is formed of a combination of at least one unit pattern having a bent straight-line shape, and
wherein the unit pattern is formed in an irregular shape where bent portions are formed.

2. The touch panel as set forth in claim 1 , wherein the unit pattern is bent in an intersecting point between the unit patterns so as to be orthogonal to each other.

3. The touch panel as set forth in claim 1 , wherein the unit pattern has the bent straight-line shape formed on the unit pattern corresponding to a portion other than the intersecting point between the unit patterns.

4. The touch panel as set forth in claim 1 , wherein the transparent substrate is made of any one of polyethylene terephthalate (PET), polycarbonate (PC), polymethly methacrylate (PMMA), polyethylene naphthalate (PEN), polyethersulfone (PES), a cyclic olefin polymer (COC), a triacetylcellulose (TAC) film, a polyvinyl alcohol (PVA) film, a polyimide (PI) film, polystyrene (PS), biaxially oriented polystyrene (K resin-containing biaxially oriented PS; BOPS), a glass, and a tempered glass.

5. The touch panel as set forth in claim 4 , wherein one surface of the transparent substrate is subjected to a high-frequency treatment or a primer treatment.

6. The touch panel as set forth in claim 1 , wherein the electrode pattern is made of any one of poly-3,4-ethylenedioxythiophene/polystyrene sulfonate (PEDOT/PSS), polyaniline, polyacetylene, and poly-phenylene vinylene.

7. The touch panel as set forth in claim 1 , wherein the electrode pattern uses a silver paste containing palladium or platinum.

8. The touch panel as set forth in claim 1 , wherein the electrode pattern uses a hybrid silver paste containing silver powder having a diameter of 3 um to 5 um and silver nanoparticles having a diameter of 2 nm to 8 nm.

9. The touch panel as set forth in claim 1 , wherein the unit pattern is formed to have a pitch of 400 μm to 500 μm and an angle of 55 to 65 degrees.

Assignees

• Samsung Electro Mech

Inventors

• Oh Sang Hwan
• Lee Jin Uk

Classifications

• G06F2203/04112

  Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material · CPC title

• G02F1/133707

  Structures for producing distorted electric fields, e.g. bumps, protrusions, recesses, slits in pixel electrodes · CPC title

• G06F2203/04103

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

• G02F1/134336

  Matrix · CPC title

• G06F3/044 Primary

  by capacitive means · CPC title