Integrated touch screen

• US 9,323,361 B2
• Filed: 06/11/2012
• Issued: 04/26/2016
• Est. Priority Date: 06/13/2011
• Status: Active Grant

• Current Assignee: LG Innotek Company Limited (LG Corporation)
• Original Assignee: LG Innotek Company Limited (LG Corporation)
• Inventors: Han, Jae Heung
• Primary Examiner(s): Yodichkas, Aneeta
• Assistant Examiner(s): WILLS-BURNS, CHINEYERE D
• Application Number:
  US13/493,221
• Publication Number:
  US 20120313877A1
• Time in Patent Office: 1,415 Days
• Field of Search: 345/174, 345/173, 216/17
• US Class Current: 1/1
• CPC Class Codes: G02F 1/133302 Rigid substrates, e.g. inorganic substrates
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G06F 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• 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

Disclosed is a structure of a touch screen which is integrally implemented with a liquid crystal panel. In the structure, a touch sensor module is integrally implemented with the liquid crystal panel, a substrate of the liquid crystal panel is formed of two side strengthened glass, and the touch sensor module is integrally implemented on the two strengthened glass, thereby being capable of improving strength of the whole touch sensor module and simplifying a process.

Claims

1. A touch window, comprising:

a sensing electrode pattern layer including a first sensing electrode pattern, a base substrate, and a second sensing electrode pattern; and

a transparent window formed on the sensing electrode pattern layer,

wherein the transparent window is disposed at a first side of the sensing electrode pattern layer,

wherein the first sensing electrode pattern is formed on a first surface of the base substrate and the second sensing electrode pattern is formed on a second surface of the base substrate opposite to the first surface,

wherein the sensing electrode pattern layer is bonded to the transparent window by an adhesive layer,

wherein unit sensing electrodes of the sensing electrode pattern layer are formed in a mesh structure, the mesh structure including an internal line,

wherein one of the first sensing electrode pattern and the second sensing electrode pattern has a curvature pattern with periodicity, and

wherein the curvature pattern with periodicity is configured such that the sensing electrode pattern in a linear type is disposed between an n curvature part and an (n+1) curvature part, wherein n represents a natural number greater than 1.

2. The touch window of claim 1, wherein the transparent window uses one among glass, acrylic resins, PET (polyethylene terephthalate), PC (polycarbonate), PES (polyether sulfone), PI (polyimide), and PMMA (polymethylmethacrylate).

3. The touch window of claim 1, wherein the sensing electrode is formed of one selected from ITO (Indium Tin Oxide), IZO (Indium Zinc Oxide), ZnO (Zinc Oxide), CNT (carbon nano tube), Ag Nano wires, conductive polymers, Graphene, Ag, Cu, or Al.

4. The touch window of claim 3, wherein the first sensing electrode pattern and the second sensing electrode pattern of the sensing electrode pattern layer are formed of the same material as a wiring part.

5. The touch window of claim 1, wherein the curvature pattern is the first sensing electrode pattern.

6. The touch window of claim 1, wherein an angle θ

in which the first sensing electrode pattern and the second sensing electrode pattern overlap with each other is formed as an acute angle or an obtuse angle.

7. The touch window of claim 1, wherein the curvature pattern is a sine pattern or a cosine pattern, and the second sensing electrode pattern passes through an inflection point of the n curvature part and the (n+1) curvature part.

8. The touch window of claim 1, wherein the mesh structure comprises lines connected by a conductive material having a width of from 3 μ

m to 10 μ

m.

9. The touch window of claim 1, further comprising a panel disposed at a second side of the sensing electrode pattern layer opposite to the first side of the sensing electrode pattern layer.

10. The touch window of claim 9, wherein the panel is a liquid crystal panel.