In-cell touch type liquid crystal display device

Patent metadata

Field	Value
Publication number	US-9329424-B2
Application number	US-201414584020-A
Country	US
Kind code	B2
Filing date	Dec 29, 2014
Priority date	Aug 26, 2014
Publication date	May 3, 2016
Grant date	May 3, 2016

Abstract

An in-cell touch type liquid crystal display device includes a touch line and a dummy touch line along a direction between neighboring pixel electrodes on a first passivation layer; a second passivation layer on the touch line and the dummy touch line; and common electrodes separated from one another in respective touch blocks, and each including first openings corresponding to each pixel region and a second opening corresponding to the touch line, wherein a connection pattern extending over a gate line from a side of the touch line at an inner region of the touch block is connected to a common electrode through a touch contact hole, and wherein an open portion is between the touch line and the dummy touch line.

First claim

What is claimed is:

1. An in-cell touch type liquid crystal display device, comprising:
gate and data lines crossing each other at a boundary of a pixel region on a substrate which includes a plurality of touch block each including a plurality of pixel regions;
a thin film transistor in each pixel region and connected to the gate and data lines;
a pixel electrode in the pixel region connected to the thin film transistor;
a first passivation layer on the pixel electrode;
a touch line and a dummy touch line along a direction between neighboring pixel electrodes on the first passivation layer;
a second passivation layer on the touch line and the dummy touch line; and
common electrodes separated from one another in respective touch blocks, and each including first openings corresponding to each pixel region and a second opening corresponding to the touch line,
wherein a connection pattern extending over the gate line from a side of the touch line at an inner region of the touch block is connected to the common electrode through a touch contact hole, and
wherein an open portion is between the touch line and the dummy touch line.

2. The device of claim 1 , wherein the open portion is outside the gate line at a boundary region of the touch block.

3. The device of claim 2 , further comprising a compensation pattern extending over the gate line from a side of the dummy touch line at the boundary region of the touch block.

4. The device of claim 3 , wherein the compensation pattern has substantially the same shape as the connection pattern.

5. The device of claim 4 , wherein a separate distance between neighboring common electrodes over the gate line at the boundary region of the touch block is at least about 2 um.

6. The device of claim 1 , wherein each of the touch line and the dummy touch line is of a low resistance metal material.

Assignees

• Lg Display Co Ltd

Inventors

• Chae Ji-Eun
• Lee Tae-Keun

Classifications

• G02F1/1368

  in which the switching element is a three-electrode device {(G02F1/136277 takes precedence)} · CPC title

• G02F1/13338 Primary

  Input devices, e.g. touch panels · CPC title

• G06F3/04164

  Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads · CPC title

• G06F3/0443

  using a single layer of sensing electrodes · CPC title

• G02F1/136286

  Wiring, e.g. gate line, drain line · CPC title