Touch display device and panel

Patent metadata

Field	Value
Publication number	US-11157102-B2
Application number	US-201816037727-A
Country	US
Kind code	B2
Filing date	Jul 17, 2018
Priority date	Oct 23, 2017
Publication date	Oct 26, 2021
Grant date	Oct 26, 2021

Abstract

A touch display device can include a panel including a plurality of touch electrodes including a first touch electrode and a second touch electrode, the first touch electrode being adjacent to and electrically isolated from the second touch electrode; a touch sensing circuit configured to drive the panel to sense a touch or a touch position; and at least one external dummy metal disposed in a boundary region between the first touch electrode and the second touch electrode, in which the at least one external dummy metal is spaced apart from and electrically isolated from the first and second touch electrodes.

First claim

What is claimed is:

1. A touch display device comprising:
a plurality of data lines disposed over a substrate;
a protective layer disposed over the plurality of data lines;
an encapsulation layer disposed over plurality of data lines;
a plurality of touch electrodes disposed over the encapsulation layer, and including a first touch electrode, a second touch electrode, and a third touch electrode, the first touch electrode being adjacent to and electrically isolated from the second and third touch electrodes;
a touch line electrically connected to at least one of the plurality of touch electrodes;
a pad disposed outside of, and spaced apart from, the encapsulation layer;
a link line disposed in a same layer as at least one of the plurality of data lines, connected to the touch line through a contact hole of the protective layer, and electrically connected to the pad;
a touch sensing circuit configured to drive the panel to sense a touch or a touch position; and
at least two external dummy metals disposed along a first boundary region between a first side of the first touch electrode and the second touch electrode and a second boundary region between a second side of the first touch electrode and the third touch electrode, respectively, the first boundary region and the second boundary region intersecting each other at one corner of the first touch electrode,
wherein the at least two external dummy metals are spaced apart from and electrically, isolated from the first, second and third touch electrodes,
wherein each of the plurality of touch electrodes includes an electrode metal patterned in a mesh type, a plurality of open areas are formed in each of the plurality of touch electrodes,
wherein a row of rectangular shaped external dummy metals is disposed between the first touch electrode and the second touch electrode, and one side of the row of rectangular shaped external dummy metals is directly adjacent to a continuous flat edge of the first touch electrode and another side of the row of rectangular shaped external dummy metals is directly adjacent to a perforated edge of the second touch electrode, and
wherein the perforated edge of the second touch electrode includes a plurality of rectangular shaped protrusions extending toward the row of rectangular shaped external dummy metals, and each of the rectangular shaped external dummy metals in the row of rectangular shaped external dummy metals is aligned with and has a same width as a corresponding one of the plurality of rectangular shaped protrusions.

2. The touch display device of claim 1 , wherein the at least two external dummy metals are disposed over a same layer as the plurality of touch electrodes and is made of a same material as the plurality of touch electrodes.

3. The touch display device of claim 1 , wherein the first boundary region includes a plurality of external dummy metals arranged in a row between the first touch electrode and the second touch electrode, and the plurality of external dummy metals are electrically isolated from the first and second touch electrodes.

4. The touch display device of claim 1 , wherein the first boundary region includes a plurality of external dummy metals arranged in two or more rows between the first touch electrode and the second touch electrode, and the plurality of external dummy metals are electrically isolated form the first and second touch electrodes.

5. The touch display device of claim 1 , wherein at least one outline of the first touch electrode and the second touch electrode is in a form of a straight line in the first boundary region between the first side of the first touch electrode and the second touch electrode.

6. The touch display device of claim 1 , wherein an outline of an electrode metal corresponding to at least one of the first touch electrode and the second touch electrode includes a plurality of protrusions in the first boundary region between the first side of the first touch electrode and the second touch electrode.

7. The touch display device of claim 1 , wherein one or more internal dummy metals is disposed within an outer boundary of at least one of the plurality of touch electrodes, and
wherein the one or more internal dummy metals are electrically isolated from the at least one of the plurality of touch electrodes.

8. The touch display device of claim 7 , wherein the one or more internal dummy metals are disposed over a same layer as the electrode metal corresponding to each of the plurality of touch electrodes, and the one or more internal dummy metals are made of a same material as the electrode metal corresponding to each of the plurality of touch electrodes.

9. The touch display device of claim 1 , wherein the touch sensing circuit applies a driving signal to one of the first touch electrode and the second touch electrode, and the touch sensing circuit receives a sensing signal from a remaining one of the first touch electrode and the second touch electrode.

10. The touch display device of claim 1 , wherein the touch sensing circuit applies a driving signal to each of the first touch electrode and the second touch electrode, and the touch sensing circuit receives a sensing signal from each of the first touch electrode and the second touch electrode.

11. The touch display device of claim 1 , further comprising:
a plurality of gate lines, and a plurality of sub-pixels disposed over the substrate,
wherein each of the plurality of open areas corresponds to a light-emitting region of at least one sub-pixel among the plurality of sub-pixels.

12. The touch display device of claim 1 , wherein the at least two external dummy metals are resulted from cutting both the electrode metal corresponding to the first touch electrode and the electrode metal corresponding to the second electrode and cutting both the electrode metal corresponding to the first touch electrode and the electrode metal corresponding to the third electrode so that the at least two external dummy metals have a direct line shape.

13. The touch display device of claim 12 , wherein the at least two external dummy metals are disposed in one row in each of the first and second boundary regions.

14. The touch display device of claim 1 , wherein the encapsulation layer includes a first encapsulation layer, a third encapsulation layer and a second encapsulation layer disposed between the first and third encapsulation layers and being thicker than the first and third encapsulation layers,
wherein the touch display device further comprises a dam disposed adjacent to an edge of the second encapsulation layer in a region between the pad and the plurality of touch electrodes, the dam including two protruding ridge portions,
wherein the touch line is disposed over the dam, and the contact ole of the protective layer is between the pad and the dam adjacent to the pad, and
wherein the touch line connects to the at least one of the plurality of touch electrodes and extends through a region where the dam is located and the touch line extends to a region outside of the dam that is adjacent to the pad for connecting with the link line.

15. A panel comprising:
a plurality of data lines disposed over a substrate;
a protective layer disposed over the plurality of data lines;
an encapsulation layer disposed over the plurality of data lines;
a plurality of touch electrodes disposed over the encapsulation layer, and including a first touch electrode, a second touch electrode, and a third touch electrode, the first touch electrode being adjacent to and electrically isolated from the second and third touch electrodes;
a plurality o

Assignees

• Lg Display Co Ltd

Inventors

• Lee Jaegyun
• Lee Yangsik

Classifications

• H10K59/87

  Passivation; Containers; Encapsulations · CPC title

• G06F3/0446

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

• G06F2203/04106

  Multi-sensing digitiser, i.e. digitiser using at least two different sensing technologies simultaneously or alternatively, e.g. for detecting pen and finger, for saving power or for improving position detection · CPC title

• G09G3/3291

  in which the data driver supplies a variable data voltage for setting the current through, or the voltage across, the light-emitting elements · CPC title

• G06F3/044 Primary

  by capacitive means · CPC title