Touch panel and display apparatus including the same

Patent metadata

Field	Value
Publication number	US-9927939-B2
Application number	US-201514818850-A
Country	US
Kind code	B2
Filing date	Aug 5, 2015
Priority date	Aug 13, 2014
Publication date	Mar 27, 2018
Grant date	Mar 27, 2018

Abstract

A touch panel including a substrate, first touch electrodes, each of the first touch electrodes including first mesh patterns disposed on the substrate, an insulation layer disposed on the first touch electrodes, second touch electrodes, each of the second touch electrodes including second mesh patterns disposed on the insulation layer, first auxiliary mesh electrodes disposed on the substrate, the first auxiliary mesh electrodes being electrically connected to at least a portion of the corresponding second mesh patterns, and second auxiliary mesh electrodes disposed on the insulation layer, the second auxiliary mesh electrodes being electrically connected to at least a portion of the corresponding first me patterns.

First claim

What is claimed is:

1. A touch panel comprising:
a film;
first touch electrodes, each of the first touch electrodes comprising first mesh patterns disposed on the film;
an insulation layer disposed on the first touch electrodes and comprising a plurality of first contact holes and a plurality of second contact holes;
second touch electrodes, each of the second touch electrodes comprising second mesh patterns disposed on the insulation layer;
first auxiliary mesh electrodes disposed on the film, each of the first auxiliary mesh electrodes being electrically connected to each of the second mesh patterns through the plurality of first contact holes;
second auxiliary mesh electrodes disposed on the insulation layer, each of the second auxiliary mesh electrodes being electrically connected to each of the first mesh patterns through the plurality of second contact holes;
dummy patterns disposed between the first mesh patterns and the first auxiliary mesh electrodes;
first trace lines disposed on the same layer as the first touch electrodes, the first trace lines being electrically connected to the corresponding first touch electrodes; and
second trace lines disposed on the same layer as the first auxiliary mesh electrodes, the second trace lines being electrically connected to the corresponding first auxiliary mesh electrodes.

2. The touch panel of claim 1 , further comprising:
first contact patterns connecting at least a portion of the first mesh patterns to the corresponding second auxiliary mesh electrodes through the first contact holes defined in the insulation layer; and
second contact patterns connecting at least a portion of the second mesh patterns to the corresponding first auxiliary mesh electrodes through the second contact holes defined in the insulation layer.

3. The touch panel of claim 1 , wherein at least a portion of each of the second mesh patterns and at least a portion of each of the first auxiliary mesh electrodes, which are electrically connected to each other, overlap each other, and
at least a portion of each of the first mesh patterns and at least a portion of each of the second auxiliary mesh electrodes, which are electrically connected to each other, overlap each other.

4. The touch panel of claim 1 , wherein the first mesh patterns and the first auxiliary mesh electrodes are formed of the same material, and
the second mesh patterns and the second auxiliary mesh electrodes are formed of the same material.

5. The touch panel of claim 1 , wherein each of the first mesh patterns and the second mesh patterns comprises metal lines defining openings,
each of the first auxiliary mesh electrodes and the second auxiliary mesh electrodes comprises metal lines defining openings,
each of the metal lines of the first auxiliary mesh electrodes has a width less than a width of each of the metal lines of the second mesh patterns, and
each of the metal lines of the second auxiliary mesh electrodes has a width greater than that a width of the metal lines of the first mesh patterns.

6. The touch panel of claim 1 , further comprising:
first and second pads disposed on the insulation layer;
third contact patterns connecting the first pads to the first trace lines through third contact holes defined in the insulation layer;
fourth contact patterns connecting the second pads to the second trace lines through further contact holes defined in the insulation layer;
first auxiliary lines disposed on the insulation layer, the first auxiliary lines being electrically connected to the first trace lines; and
second auxiliary lines disposed on the insulation layer, the second auxiliary lines being electrically connected to the second trace lines.

7. The touch panel of claim 6 , wherein each of the first auxiliary lines has a width different from a width of each of the first trace lines, and
each of the second auxiliary lines has a width different from a width of each of the second trace lines.

8. The touch panel of claim 1 ,
wherein each of the dummy patterns is in a floated state.

9. A touch panel comprising:
a film;
first touch electrodes disposed on the film and each of the first touch electrodes comprises mesh patterns, the first touch electrodes extending in a first direction;
an insulation layer disposed on the first touch electrodes;
second touch electrodes disposed on the insulation layer, the second touch electrodes extending in a second direction crossing the first direction;
first auxiliary electrodes disposed on the same layer as the first touch electrodes and each of which has a mesh shape, the first auxiliary electrodes being electrically connected to at least a portion of the second touch electrodes; and
second auxiliary electrodes disposed on the same layer as the second touch electrodes, the second auxiliary electrodes being electrically connected to at least a portion of the first touch electrodes,
wherein each of the second touch electrodes comprises:
first portions disposed on first regions; and
second portions disposed on second regions different from the first regions and second portions having a pattern shape different from the first portions,

wherein the first portions disposed on the first regions cover first auxiliary electrodes, first touch electrodes disposed on the first regions, openings defined by the first auxiliary electrodes disposed on the first regions, and openings defined by the first touch electrodes disposed on the first regions,
wherein the second portions comprise first overlapping patterns covering first auxiliary electrodes disposed on the second regions and first inner patterns spaced apart from the first overlapping patterns and disposed within the openings defined by the first auxiliary electrodes disposed on the second regions,
wherein the first portions comprise overlapping portions overlapping the first touch electrodes and connection portions connecting the overlapping portions to each other,
wherein the second portions are connected to the connection portions and disposed outside the connection portions,
wherein the second auxiliary electrodes comprise third portions disposed on third regions and fourth portions disposed on fourth regions and each of the fourth portions has a pattern shape different from each of the third portions,
wherein the third portions are disposed on the third regions and cover mesh patterns and openings defined by the mesh patterns disposed on the third regions, and
wherein the fourth portions are disposed on the fourth regions and comprise second overlapping patterns covering mesh patterns and second inner patterns spaced apart from the second overlapping patterns and disposed within openings defined by the mesh patterns disposed on the fourth regions.

10. The touch panel of claim 9 , wherein each of the third portions overlaps a central portion of each of the mesh pattern, and
the fourth portions are connected to the third portions and disposed outside the third portions.

11. The touch panel of claim 9 , wherein the first portions and the third portions do not have openings.

12. The touch panel of claim 9 , wherein the first and second inner patterns are electrically floated,
one of the first inner patterns is disposed in one of the openings defined by the first auxiliary electrodes, and
one of the second inner patterns is disposed in one of the openings defined by the mesh patterns.

13. The touch panel of claim 9 , wherein the first and second inner patterns are electrically floated,
the first inner patterns are spaced apart from each other and are disposed in one of the openings defined by the first auxiliary electrodes, an

Assignees

• Samsung Display Co Ltd

Inventors

• Na Hyunjae
• Jun Sanghyun
• Ko Gwang-Bum
• Lee Joohyung
• Lee Jigong
• Jang Hyoungwook
• Ahn Soonsung

Classifications

• G09G2300/0426

  Layout of electrodes and connections · 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

• 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

• G09G5/003

  Details of a display terminal, the details relating to the control arrangement of the display terminal and to the interfaces thereto (specific for a CRT G09G1/165; for a flat panel G09G3/2092) · CPC title

• G06F3/047 Primary

  using sets of wires, e.g. crossed wires · CPC title