In-cell touch type liquid crystal display device

• US 9,329,424 B2
• Filed: 12/29/2014
• Issued: 05/03/2016
• Est. Priority Date: 08/26/2014
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Chae, Ji-Eun, Lee, Tae-Keun
• Primary Examiner(s): RALEIGH, DONALD L
• Application Number:
  US14/584,020
• Publication Number:
  US 20160062164A1
• Time in Patent Office: 491 Days
• US Class Current: 1/1
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/136286 Wiring, e.g. gate line, drain line
• CPC Class Codes: G02F 1/1368 in which the switching element is a three-electrode device G02F1/136277 takes precedence
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/04164 Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
• CPC Class Codes: G06F 3/044 by capacitive means
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• CPC Class Codes: G06F 3/047 using sets of wires, e.g. crossed wires

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.

Claims

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.