Touch sensor and touch screen panel having bending portion

Patent metadata

Field	Value
Publication number	US-11693524-B2
Application number	US-202017015368-A
Country	US
Kind code	B2
Filing date	Sep 9, 2020
Priority date	Mar 31, 2016
Publication date	Jul 4, 2023
Grant date	Jul 4, 2023

Abstract

A touch sensor may include a substrate, a sensing pattern, and bridge electrodes. The sensing pattern may include a first pattern along a first direction and a second pattern along a second direction. The second pattern may include unit patterns isolated from each other. The bridge may electrically connect neighboring unit patterns, and the bridge electrodes adjacent in the first direction may be parallel to each other. An angle between an extending direction of the bridge electrode and the first direction may be from 45° to 89°. The substrate, the bridge electrode and the sensing pattern may be bent together to form a bending portion. The bridge electrode may extend in a direction the same as a bending direction. A bending angle between a body of the substrate which is not bent and an end portion of the bending portion may be greater than 0° and less than 180°.

First claim

What is claimed is:

1. A touch sensor, comprising:
a substrate;
a sensing pattern on the substrate, the sensing pattern comprising a first pattern and a second pattern, the first pattern being arranged along a first direction parallel to a surface of the substrate, the second pattern being arranged along a second direction, the second direction being parallel to the surface of the substrate and crossing the first direction, the second pattern comprising unit patterns isolated from each other; and
a plurality of bridge electrodes electrically connecting neighboring unit patterns of the unit patterns, wherein all of the plurality of bridge electrodes have the same extending direction,
wherein an angle between an extending direction of the bridge electrode and the first direction in a planar view is from 45° to 89°;
the substrate, the bridge electrode and the sensing pattern are bent together to form a bending portion, and the bridge electrode extends in a direction the same as a bending direction of the bending portion; and
the bending direction is a direction toward the bending portion of the substrate,
a bending angle between a body of the substrate which is not bent and an end portion of the bending portion is greater than 0° and less than 180°.

2. The touch sensor of claim 1 , wherein the first pattern comprises a connecting portion and unit patterns electrically connected to each other via the connecting portion.

3. The touch sensor of claim 2 , further comprising an insulation layer formed on the connecting portion of the first pattern.

4. The touch sensor of claim 3 , wherein the bridge electrode is disposed at a different level from that of the first pattern and electrically separated from the first pattern by the insulation layer.

5. The touch sensor of claim 2 , wherein a line width of the bridge electrode is from 1.5% to 200% of the connecting portion included in the first pattern.

6. The touch sensor of claim 1 , wherein the bending direction is a direction toward the bending portion of the substrate.

7. The touch sensor of claim 1 , wherein the first pattern and the second pattern are disposed at the same level.

8. The touch sensor of claim 1 , wherein the bridge electrodes comprise at least one selected from a group consisting of indium tin oxide (ITO), indium zinc oxide (IZO), indium zinc tin oxide (IZTO), aluminum zinc oxide (AZO), gallium zinc oxide (GZO), fluorine tin oxide (FTO), ITO-silver (Ag)-ITO, IZO-Ag-IZO, IZTO-Ag-IZTO and AZO-Ag-AZO.

9. The touch sensor of claim 1 , wherein the bridge electrodes comprise at least one selected from a group consisting of molybdenum, silver, aluminum, copper, palladium, gold, platinum, zinc, tin, titanium and an alloy thereof.

10. The touch sensor of claim 1 , wherein a thickness of the bridge electrode is from 20% to 1,300% of a thickness of the unit pattern included in the second pattern.

11. A touch screen panel comprising the touch sensor of claim 1 .

12. An image display device comprising the touch screen panel of claim 11 .

Assignees

• Dongwoo Fine Chem Co Ltd

Inventors

• Kim Keon
• Choi Byung Jin

Classifications

• 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

• G06F3/044 Primary

  by capacitive means · CPC title

• G06F3/0446 Primary

  using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes · 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

• G06F3/0443

  using a single layer of sensing electrodes · CPC title