Liquid crystal display device

Patent metadata

Field	Value
Publication number	US-9785024-B2
Application number	US-201514619308-A
Country	US
Kind code	B2
Filing date	Feb 11, 2015
Priority date	Jan 30, 2003
Publication date	Oct 10, 2017
Grant date	Oct 10, 2017

Abstract

An LCD device provides enhanced display quality. An insulating layer is formed on a first substrate. The insulating layer covers the contact portion of a switching device in which the switching device is electrically connected to a transparent electrode and has an opening for exposing a portion of the transparent electrode. A reflection electrode is electrically connected to the transparent electrode through the opening. The insulation layer covers a first portion of a driving circuit formed on the first substrate. A sealant is interposed between the first and second substrate to engage the first and second substrate and to cover a second portion of the driving circuit. Therefore, the driver circuit may operate normally, and the distortion of the signal outputted from the driver circuit may be prevented.

First claim

What is claimed is:

1. A liquid crystal display device comprising:
a first substrate comprising a display part comprising a switching element and a pixel electrode electrically connected to the switching element to display an image and a driver part comprising a plurality of transistors configured to drive the display part;
a second substrate facing the first substrate;
a sealing member disposed between the first and second substrates and covering at least a portion of the driver part; and
a liquid crystal layer disposed between the first and second substrates,
wherein the switching element of the display part comprises:
a gate electrode;
a gate insulation layer covering the gate electrode;
a source electrode disposed on the gate insulation layer; and
a drain electrode disposed on the gate insulation layer and spaced apart from the source electrode,

wherein the driver part comprises:
a first conductive pattern comprising a gate electrode for the transistors;
a second conductive pattern comprising a source electrode and a drain electrode for the transistors and disposed in a different layer from the first conductive pattern;
an insulation layer that covers the first conductive pattern and the second conductive pattern and comprises a first contact hole overlapping the first conductive pattern and a second contact hole overlapping the second conductive pattern; and
a connection layer electrically connecting the first conductive pattern of one transistor of the driver part to the second conductive pattern of a different transistor of the driver part through the first contact hole and the second contact hole, and comprising a transparent conductive material.

2. The liquid crystal display device of claim 1 , wherein the sealing member entirely covers the driver part.

3. The liquid crystal display device of claim 1 , wherein the second substrate further comprises a common electrode facing the pixel electrode.

4. The liquid crystal display device of claim 3 , wherein the common electrode does not overlap the driver part.

5. The liquid crystal display device of claim 1 , wherein the first substrate further comprises a gate line and a data line, which are electrically connected to the switching element.

6. The liquid crystal display device of claim 1 , wherein the driver part is configured to receive an electric power and a clock signal to generate and output a gate driving signal to the gate line.

7. The liquid crystal display device of claim 1 , wherein the insulation layer comprises an organic insulation layer.

8. The liquid crystal display device of claim 1 , wherein
the first conduction pattern comprises a gate electrode of a first transistor and an end contacting the connection layer,
and the second conduction pattern comprises a first end contacting the connection layer and a second end, which is a source electrode of a second transistor.

9. The liquid crystal display device of claim 1 , wherein the gate electrode of the driver part overlap the source electrode and the drain electrode of the driver part in a plan view.

10. The liquid crystal display device of claim 1 , wherein the transparent conductive material comprises indium tin oxide or indium zinc oxide.

11. The liquid crystal display device of claim 1 , wherein the transistors of the driver part and the switching element of the display part are formed in a same process.

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Dong-Ho

Classifications

• G02F2203/09

  transflective · CPC title

• G02F1/1368

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

• G02F1/133345

  Insulating layers (G02F1/1335, G02F1/1337, G02F1/135, G02F1/136 take precedence) · CPC title

• G02F1/136286

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

• G02F1/13454 Primary

  Drivers integrated on the active matrix substrate (G02F1/136277 takes precedence) · CPC title