Touch sensor and laminate including the same

Patent metadata

Field	Value
Publication number	US-11995284-B2
Application number	US-202118018768-A
Country	US
Kind code	B2
Filing date	Aug 17, 2021
Priority date	Aug 24, 2020
Publication date	May 28, 2024
Grant date	May 28, 2024

Abstract

A touch sensor has a base layer and an electrode layer. The electrode layer includes a first transparent oxide layer formed on the base layer, a conductive metal layer formed on the first transparent oxide layer, and a second transparent oxide layer formed on the conductive metal layer and has a plurality of through-holes with the same shape and spacing.

First claim

The invention claimed is:

1. A touch sensor comprising:
a base layer; and
an electrode layer including a first transparent oxide layer formed on the base layer, a conductive metal layer formed on the first transparent oxide layer, and a second transparent oxide layer formed on the conductive metal layer and having a plurality of through-holes with same shape and spacing,
wherein the electrode layer has an aperture ratio of 30 to 70%, and wherein the electrode layer has a resistance of 14 to 33Ω/□.

2. The touch sensor according to claim 1 , wherein the through-holes has a polygonal or curved shape.

3. The touch sensor according to claim 2 , wherein, when the through-holes have a polygonal shape, an edge of the polygon is bent.

4. The touch sensor according to claim 1 , wherein the through-holes include:
a curved or polygonal main through-hole; and
a linear auxiliary through-hole intermittently surrounding the main through-hole outside the main through-hole.

5. The touch sensor according to claim 1 , wherein the electrode layer includes:
a first electrode layer having a plurality of first through-holes formed on the base layer and having same shape and spacing;
an insulation layer formed on the first electrode layer; and
a second electrode layer having a plurality of second through-holes formed on the insulation layer and having same shape and spacing but not overlapping the first through-holes.

6. The touch sensor according to claim 5 , wherein the insulation layer fills the first through-holes and the second through-holes.

7. The touch sensor according to claim 5 , wherein portions of the first through-holes and the second through-holes overlap in a region where the first electrode layer and the second electrode layer intersect.

8. The touch sensor according to claim 1 , wherein the electrode layer has a transmittance of 87.1 to 89.9%.

9. A laminate comprising:
the touch sensor according to claim 1 ; and
a window layer coupled to one surface of the touch sensor.

10. The laminate according to claim 9 , further comprising a wear-resistant layer laminated on an outermost surface of the window layer on a viewer side.

11. The laminate according to claim 10 , further comprising a hard coating layer laminated between the window layer and the wear-resistant layer.

12. An image display device comprising:
the touch sensor according to claim 1 ; and
a display panel coupled to one surface of the touch sensor.

Assignees

• Dongwoo Fine Chem Co Ltd

Inventors

• Son Dongjin
• Kim Junha

Classifications

• G06F3/0448 Primary

  Details of the electrode shape, e.g. for enhancing the detection of touches, for generating specific electric field shapes, for enhancing display quality · CPC title

• G06F3/0445 Primary

  using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer · CPC title

• G06F2203/04111

  Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate · CPC title

• G06F3/041

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