Touch window

Patent metadata

Field	Value
Publication number	US-10409432-B2
Application number	US-201615568352-A
Country	US
Kind code	B2
Filing date	Apr 8, 2016
Priority date	Apr 24, 2015
Publication date	Sep 10, 2019
Grant date	Sep 10, 2019

Abstract

A touch window according to an embodiment comprises: a substrate; a sensing electrode arranged on the substrate; and a reflection prevention layer arranged on the sensing electrode, wherein the reflection prevention layer comprises a first sub reflection prevention layer arranged on a first surface of the sensing electrode, a third sub reflection prevention layer arranged on a second surface, which lies opposite the first surface, and second sub reflection prevention layers arranged on both side surfaces, which connect the first and second surfaces, respectively. In addition, a touch window according to an embodiment comprises: a substrate; a base member comprising a pattern portion arranged on the substrate; a sensing electrode arranged inside the pattern portion; and a reflection prevention layer surrounding the sensing electrode, wherein the reflection prevention layer comprises a first sub reflection prevention layer arranged on the lower surface of the sensing electrode, second sub reflection prevention layers arranged on both side surfaces of the sensing electrode, and a third sub reflection prevention layer arranged on the upper surface of the sensing electrode, and the second sub reflection prevention layers comprise inclined surfaces, respectively. In addition, a touch window according to an embodiment comprises: a substrate; a sensing electrode on the substrate; a first sub reflection prevention layer arranged on a first surface of the sensing electrode; and a third sub reflection prevention layer arranged on a second surface of the sensing electrode, wherein at least one of the sensing electrode, the first sub reflection prevention layer, and the third sub reflection prevention layer has a side surface inclined at an acute angle of inclination with regard to a surface of the substrate.

First claim

The invention claimed is:

1. A touch window comprising:
a substrate;
a sensing electrode disposed on the substrate; and
a reflection prevention layer disposed on the sensing electrode,
wherein the sensing electrode comprises mesh lines defined by a plurality of sub electrodes crossing each other in a mesh shape and a mesh opening between the mesh lines,
each of the mesh line has a line width of 0.1 μm to 10 μm,
the sensing electrode and the reflection prevention layer have an inclined surface, and
wherein the reflection prevention layer comprises a first sub reflection prevention layer disposed on a first surface of the sensing electrode, a third sub reflection prevention layer disposed on a second surface opposite to the first surface, and a second sub reflection prevention layer disposed on a first side surface and a second side surface of the sensing electrode connecting the first surface to the second surface, the first surface of the sensing electrode being closer to the substrate than the second surface of the substrate,
wherein a width of the sensing electrode is from the first side surface to the second side surface, the width of the sensing electrode varies based on a distance from the second surface toward the first surface, and wherein the width of the sensing electrode continuously increase from the second surface toward the first surface,
wherein a side surface of the sensing electrode is inclined with respect to a surface of the substrate,
wherein a side surface of the reflection prevention layer is inclined with respect to the surface of the substrate, and
wherein an inclined angle of the side surface of the sensing electrode or the side surface of the reflection prevention layer is within a range of 20° to 70°.

2. The touch window according to claim 1 , wherein the sensing electrode comprises:
a first sensing electrode disposed on one surface of the substrate; and
a second sensing electrode disposed on the other surface of the substrate,
wherein the first sensing electrode and the second sensing electrode extend in different directions.

3. The touch window according to claim 2 , wherein, in the sensing electrode, one surface coming into contact with the first sub reflection prevention layer has a width greater than that of the other surface opposite to the one surface, which comes into contact with the third sub reflection prevention layer.

4. The touch window according to claim 1 , wherein the first sub reflection prevention layer is disposed between the sensing electrode and the substrate,
the first sub reflection prevention layer, the second sub reflection prevention layer, and the third reflection prevention layer are connected to each other,
the first sub reflection prevention layer, the second sub reflection prevention layer, and the third reflection prevention layer are disposed on an entire surface of the sensing electrode, and
the second sub reflection prevention layer has an inclined angle corresponding to an inclined surface of the sensing electrode.

5. The touch window according to claim 1 , wherein a lightness index (L*) of the reflection prevention layer is less than 40, and
a chromaticity index (b*) of the reflection prevention layer has a negative value.

6. The touch window according to claim 1 , wherein a ratio of a thickness of the reflection prevention layer to a thickness of the sensing electrode is 1:25.

7. The touch window according to claim 1 , wherein the sensing electrode includes at least one metal of Cr, Ni, Cu, Al, Ag, Mo, Au, Ti, and an alloy thereof.

8. The touch window according to claim 1 , wherein the reflection prevention layer includes at least one of Cu 2 Se, Cu—Pd, CuO, CrO, FeO, and Ni 2 O 3 .

9. A touch window comprising:
a substrate;
a base member disposed on the substrate and comprising an engraved pattern part, wherein a side surface of the engraved pattern part has an inclined surface;
a sensing electrode disposed in the engraved pattern part; and
a reflection prevention layer surrounding the sensing electrode,
wherein the engraved pattern part has a mesh shape crossing each other,
the sensing electrode comprises mesh lines defined by a plurality of sub electrodes crossing each other in a mesh shape and a mesh opening between the mesh lines,
each of the mesh line has a line width of 0.1 μm to 10 μm,
the pattern part has a height greater than that of each of the sensing electrode and the reflection prevention layer, which are disposed in the pattern part, and
wherein the reflection prevention layer comprises a first sub reflection prevention layer disposed on a bottom surface of the sensing electrode, a second sub reflection prevention layer disposed to come into entire contact with each of first side surface and second side surface of the sensing electrode, and a third sub reflection prevention layer disposed on a top surface of the sensing electrode, the bottom surface of the sensing electrode is closer to the substrate than the top surface of the sensing electrode,
wherein the second sub reflection prevention layer has an inclined surface that corresponds to the side surface of the pattern part,
wherein the first sub reflection prevention layer on the bottom surface of the sensing electrode is coupled to the second sub reflection prevention layer on the first side surface of the sensing electrode such that a first corner of the sensing electrode between the first sub reflection prevention layer and the second sub reflection prevention layer has an obtuse angle, and
the third sub reflection prevention layer and the second sub reflection prevention layer are coupled to each other such that a second corner of the sensing electrode between the third sub reflection prevention layer and the second sub reflection prevention layer has an acute angle.

10. The touch window according to claim 9 , wherein each of the sensing electrode and the reflection prevention layer comprises a plated layer.

11. The touch window according to claim 9 , wherein the third sub reflection prevention layer has a width greater than that of the first sub reflection prevention layer.

12. The touch window according to claim 9 , wherein each of the first to third sub reflection prevention layers comprises a blackening layer.

13. A touch device comprising:
a display panel; and
a touch window on the display panel,
wherein the display panel is an organic electroluminescence light emitting device,
wherein the display panel includes a first substrate and a second substrate,
wherein a thin film transistor and an organic light-emitting device are formed on the first substrate,
wherein the second substrate is an encapsulation substrate on the organic light-emitting device, and
wherein the touch window includes:
a substrate;
a sensing electrode disposed on the substrate; and
a reflection prevention layer disposed on the sensing electrode,
wherein the sensing electrode comprises mesh lines defined by a plurality of sub electrodes crossing each other in a mesh shape and a mesh opening between the mesh lines,
each of the mesh line has a line width of 0.1 μm to 10 μm,
the sensing electrode and the reflection prevention layer have an inclined surface, and
wherein the reflection prevention layer comprises a first sub reflection prevention layer disposed on a first surface of the sensing electrode, a third sub reflection prevention layer disposed on a second surface opposite to the first surface, and a second sub reflection prevention layer disposed on a first side surface and a second side surface of the sensing electrode connecting the first surface to the second surface, the first surface

Assignees

• Lg Innotek Co Ltd

Inventors

• Cho Sung Oh
• Kweon Seong Il
• Lee Dong Keon
• Kim Woong Sic
• Kim Ja Ram
• Seong Dong Mug
• Lee Suk Yong

Classifications

• G06F3/041

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

• G06F3/044 Primary

  by capacitive means · CPC title

• G06F3/0412

  Digitisers structurally integrated in a display · CPC title

• G06F2203/04102

  Flexible digitiser, i.e. constructional details for allowing the whole digitising part of a device to be flexed or rolled like a sheet of paper · CPC title

• 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