Touch panel and display device including the same

Patent metadata

Field	Value
Publication number	US-2018059837-A1
Application number	US-201715597980-A
Country	US
Kind code	A1
Filing date	May 17, 2017
Priority date	Aug 30, 2016
Publication date	Mar 1, 2018
Grant date	—

Abstract

A touch panel includes: a substrate; a plurality of sensor electrodes disposed on the substrate; and a dummy pattern disposed on the substrate among the plurality of sensor electrodes. Each of the sensor electrode includes a plurality of first mesh patterns extending in a first direction and a plurality of second mesh patterns connecting adjacent ones of the plurality of first mesh patterns in a second direction, and the dummy pattern includes a plurality of third mesh patterns extending in the first direction and one or more disconnected portions on an extension path of the plurality of third mesh patterns.

First claim

What is claimed is:

1 . A touch panel comprising:
a substrate; a plurality of sensor electrodes disposed on the substrate; and a dummy pattern disposed on the substrate among the plurality of sensor electrodes, wherein each of the plurality of sensor electrodes comprises a plurality of first mesh patterns extending in a first direction and a plurality of second mesh patterns connecting adjacent ones of the plurality of first mesh patterns in a second direction, and the dummy pattern comprises a plurality of third mesh patterns extending in the first direction and one or more disconnected portions on an extension path of the plurality of third mesh patterns.

2 . The touch panel as claimed in claim 1 , wherein the dummy pattern and the plurality of sensor electrodes are disposed on a same layer.

3 . The touch panel as claimed in claim 2 , wherein the dummy pattern is spaced apart from the plurality of sensor electrodes in a plan view.

4 . The touch panel as claimed in claim 1 , further comprising a plurality of routing wirings connected to the plurality of sensor electrodes, respectively.

5 . The touch panel as claimed in claim 4 , wherein the plurality of routing wirings and the plurality of sensor electrodes have a substantially same pattern.

6 . The touch panel as claimed in claim 4 , wherein the dummy pattern is disposed among the plurality of sensor electrodes and the plurality of routing wirings.

7 . The touch panel as claimed in claim 4 , wherein the dummy pattern is disposed among the plurality of routing wirings.

8 . The touch panel as claimed in claim 4 , wherein the dummy pattern is disposed at an edge portion of the substrate.

9 . The touch panel as claimed in claim 4 , wherein the dummy pattern is disposed substantially in an entire area of the substrate except areas in which the plurality of sensor electrodes and the plurality of routing wirings are disposed.

10 . The touch panel as claimed in claim 1 , wherein the plurality of sensor electrodes are disposed on the substrate in a matrix form.

11 . The touch panel as claimed in claim 1 , wherein each of the plurality of sensor electrodes has a shape selected from: a substantially quadrangular shape, a substantially triangular shape, a substantially lozenge shape, a substantially circular shape, a substantially elliptical shape, a substantially semicircular shape, a substantially polygonal shape, and any combination thereof.

12 . The touch panel as claimed in claim 1 , wherein the dummy pattern further comprises a plurality of fourth mesh patterns connecting adjacent ones of the plurality of third mesh patterns.

13 . The touch panel as claimed in claim 12 , wherein each of the plurality of fourth mesh patterns is disconnected at one or more portions of the adjacent ones of the plurality of third mesh patterns.

14 . The touch panel as claimed in claim 12 , wherein each of the plurality of first mesh patterns, the plurality of second mesh patterns, the plurality of third mesh patterns, and the plurality of fourth mesh patterns comprises one or more of: indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), carbon nanotube (CNT), and graphene.

15 . The touch panel as claimed in claim 1 , wherein each of the plurality of first mesh patterns has one of a linear shape, a curved shape, and a zig-zag shape.

16 . The touch panel as claimed in claim 1 , wherein each of the plurality of third mesh patterns has one of a linear shape, a curved shape, and a zig-zag shape.

17 . The touch panel as claimed in claim 1 , wherein, when an area of the sensor electrode with respect to a unit area of the substrate is defined as a first area ratio, and an area of the dummy pattern with respect to the unit area of the substrate is defined as a second area ratio, a ratio of the second area ratio to the first area ratio is in a range of about 90% to about 100%.

18 . The touch panel as claimed in claim 4 , wherein, when an area of the dummy pattern with respect to a unit area of the substrate is defined as a second area ratio, and an area of the routing wiring with respect to the unit area of the substrate is defined as a third area ratio, a ratio of the second area ratio to the third area ratio is in a range of about 90% to about 100%.

19 . A display device comprising:
a display panel comprising a plurality of pixels; and a touch panel disposed on the display panel, wherein the touch panel comprises: a substrate; a plurality of sensor electrodes disposed on the substrate; and a dummy pattern disposed on the substrate among the plurality of sensor electrodes, wherein each of the plurality of sensor electrodes comprises: a plurality of first mesh patterns extending in a first direction and a plurality of second mesh patterns connecting adjacent ones of the plurality of first mesh patterns in a second direction, and the dummy pattern comprises a plurality of third mesh pattern extending in the first direction and one or more disconnected portions on an extension path of the plurality of third mesh patterns.

20 . The display device as claimed in claim 19 , wherein, when an area of the sensor electrode with respect to a unit area of the substrate is defined as a first area ratio, and an area of the dummy pattern with respect to the unit area of the substrate is defined as a second area ratio, a ratio of the second area ratio to the first area ratio is in a range of about 90% to about 100%.

21 . The display device as claimed in claim 19 , further comprising a plurality of routing wirings connected to the plurality of sensor electrodes, respectively.

22 . The touch panel as claimed in claim 21 , wherein, when an area of the dummy pattern with respect to a unit area of the substrate is defined as a second area ratio, and an area of the routing wiring with respect to the unit area of the substrate is defined as a third area ratio, a ratio of the second area ratio to the third area ratio is in a range of about 90% to about 100%.

Assignees

• Samsung Display Co Ltd

Inventors

• KIM Jeongyoung
• Kim Donghwan
• Lee Yoongyu
• Hwang Seongmo

Classifications

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · 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

• G06F3/044

  by capacitive means · CPC title

• G06F3/0443

  using a single layer of sensing electrodes · 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