Touch screen panel

Patent metadata

Field	Value
Publication number	US-9891764-B2
Application number	US-201414574167-A
Country	US
Kind code	B2
Filing date	Dec 17, 2014
Priority date	Dec 26, 2013
Publication date	Feb 13, 2018
Grant date	Feb 13, 2018

Abstract

A touch screen panel includes a substrate and a black matrix located on the substrate in a mesh pattern. On the black matrix are formed a first touch sense electrode and a second sense electrode. The first touch sense electrode extends in a first direction and the second touch sense electrode has a plurality of blocks extending in a second direction. An insulation layer with openings exposes portions of the blocks of the second touch sense electrode. A connection electrode connects the adjacent blocks of the second touch sense electrode via the openings in the insulation layer. The first touch sense electrode and the second touch sense electrode are covered by the pattern of the black matrix.

First claim

What is claimed is:

1. A touch screen panel, comprising:
a substrate;
a black matrix on the substrate in a mesh pattern;
a first touch sense electrode on the black matrix, the first touch sense electrode extending in a first direction;
a plurality of second touch sense electrodes on the black matrix, each of the second touch sense electrodes having a plurality of blocks extending in a second direction;
an insulation layer with openings to expose portions of the second touch sense electrodes; and
a connection electrode directly connecting adjacent second touch sense electrodes separated in the second direction via the openings in the insulation layer,
wherein the first touch sense electrode and the second touch sense electrode are covered by the mesh pattern of the black matrix,
wherein the first touch sense electrode and each of the plurality of blocks in each of the second touch sense electrodes include a plurality of electrode branches for touch sensing, at least one of the electrode branches have a length different from another of the electrode branches,
wherein the connection electrode is interposed between the black matrix and the insulation layer, and
wherein the first touch sense electrode and the second touch sense electrodes are at a same side of the insulation layer.

2. The touch screen panel according to claim 1 , wherein the electrode branches of the first touch sense electrode are insulated from the electrode branches of the blocks in each of the second touch sense electrodes.

3. The touch screen panel according to claim 2 , wherein at least one of the branches in a block of each of the second touch sense electrodes has an exposed portion via the openings in the insulation layer.

4. The touch screen panel according to claim 1 , wherein the first touch sense electrode and the second touch sense electrodes are located in the same plane.

5. The touch screen panel according to claim 4 , wherein the first touch sense electrode and the second touch sense electrodes are interposed between the black matrix and the insulation layer, and wherein the connection electrode is on the insulation layer.

6. The touch screen panel according to claim 1 , wherein the insulation layer has substantially a same pattern as the mesh pattern of the black matrix.

7. The touch screen panel according to claim 1 , wherein the insulation layer has a pattern that exposes at least some portion of the second touch sense electrodes other than the openings.

8. The touch screen panel according to claim 7 , wherein the insulation layer is positioned in an area where the first touch sense electrode and the connection electrode overlap each other, insulating the first electrode from the connecting electrode.

9. The touch screen panel according to claim 1 , wherein a width of the black matrix is equal to or larger than a width of the first touch sense electrode and equal to or larger than a width of each of the second touch sense electrodes.

10. The touch screen panel according to claim 1 , wherein the first touch sense electrode, the second touch sense electrodes, and the connection electrode are made of a metal material.

11. The touch screen panel according to claim 1 , wherein the connection electrode overlaps, in part, the mesh pattern of the black matrix.

12. A touch screen panel, comprising:
a substrate;
a black matrix on the substrate in a mesh pattern;
a first touch sense unit comprising a plurality of first sense electrodes extending in a first direction;
a second touch sense unit comprising a plurality of second touch sense electrodes extending in a second direction; and
an insulation layer interposed between the first touch sense unit and the second touch sense unit, the insulation layer having the same pattern as the mesh pattern of the black matrix,
wherein the first touch sense unit and the second touch sense unit are covered under the mesh pattern of the black matrix, and each of the first touch sense electrodes and each of the second touch sense electrodes includes a plurality of electrode branches for touch sensing, a subset of the plurality of electrode branches having lengths different from each other.

13. The touch screen panel according to claim 12 , wherein the insulation layer exists in an area where the first touch sense electrodes and the second touch sense electrodes overlap each other.

14. The touch screen panel according to claim 12 , wherein a pattern of the first touch sense unit and a pattern of the second touch sense unit collectively form substantially a same pattern as the mesh pattern of the black matrix.

15. The touch screen panel according to claim 12 , wherein a width of the black matrix is equal to or larger than a width of the first touch sense electrode and a width of the second touch sense electrode.

16. The touch screen panel according to claim 12 , wherein the first touch sense electrode and the second touch sense electrode are made of a metal material.

17. The touch screen panel according to claim 1 , wherein the connection electrode is in contact with the electrode branches of the adjacent blocks of the second touch sense electrodes.

18. The touch screen panel according to claim 1 , wherein the plurality of electrode branches include a center electrode branch, a first group of electrode branches at one side of the center electrode branch and a second group of electrode branches at the other side of the center electrode branch, and
the first group of electrode branches is symmetric about the center electrode branch relative to the second group of electrode branches.

Assignees

• Lg Display Co Ltd

Inventors

• Song Moonbong
• Lee Deuksu

Classifications

• G06F2203/04103

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

• G06F3/044 Primary

  by capacitive means · CPC title

• G06F3/0448

  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

• 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

• 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