Liquid crystal display apparatus

Patent metadata

Field	Value
Publication number	US-9798206-B2
Application number	US-201514858441-A
Country	US
Kind code	B2
Filing date	Sep 18, 2015
Priority date	Mar 28, 2011
Publication date	Oct 24, 2017
Grant date	Oct 24, 2017

Abstract

A liquid crystal display apparatus includes: an array substrate; a seal material; and an opposite substrate, wherein the array substrate includes: a plurality of thin film transistors formed in correspondence to respective intersection parts of a plurality of gate wirings and a plurality of source wirings; a pixel electrode connected to the thin film transistor; an opposite electrode formed to face the pixel electrode; a gate extraction wiring that connects the gate wirings and a connection terminal formed in an outer area of the seal material; a conductive film that covers the gate extraction wiring with sandwiching a first insulation film therebetween; and a second insulation film that covers the conductive film in at least part of the outer area of the seal material, and wherein the conductive film is applied with an electrical potential of the opposite electrode.

First claim

What is claimed is:

1. A liquid crystal display apparatus comprising:
an array substrate that includes a plurality of thin film transistors formed in corresponding to intersection parts of a plurality of gate wirings and a plurality of source wirings; and
an opposite substrate that is arranged to face the array substrate with sandwiching liquid crystals therebetween, the liquid crystals being sealed in an area surrounded by a seal material,
wherein the array substrate includes:
a pixel electrode that is connected to the thin film transistor;
an opposite electrode that is formed to face the pixel electrode;
a gate extraction wiring that is connected to the gate wiring, the gate extraction wiring extending from an inside of the area surrounded by the seal material to an outside of the area surrounded by the seal material;
a first insulation film that is formed on the gate extraction wiring;
a transparent conductive film that is formed on the first insulation film and is applied with an electrical potential, the transparent conductive film covering the gate extraction wiring with interposing the first insulation film therebetween; and
a second insulation film that covers the transparent conductive film in at least part of the outside of the area surrounded by the seal material, and
wherein, in the outside of the area surrounded by the seal material, the opposite substrate, on which an electrode applied with an electrical potential is not formed, faces the gate extraction wiring with interposing the transparent conductive film and the second insulation film which are formed on the outside of the area surrounded by the seal material.

2. The liquid crystal display apparatus according to claim 1 , further comprising
a common wiring that is formed on the inside of the area surrounded by the seal material, the common wiring applying an electrical potential to the transparent conductive film and the opposite electrode.

3. The liquid crystal display apparatus according to claim 2 , wherein the transparent conductive film is directly connected to the common wiring and extends from the common wiring to the outside area of the seal material under the bottom of the seal material.

4. The liquid crystal display apparatus according to claim 2 , wherein the transparent conductive film is formed on the same layer as the common wiring and extends from the inside to the outside of the area surrounded by the seal material under the bottom of the seal material.

5. The liquid crystal display apparatus according to claim 1 ,
wherein the transparent conductive film is formed on the area where the gate wiring extends from the inside to the outside of the area surrounded by the seal material.

6. The liquid crystal display apparatus according to claim 1 ,
wherein a black matrix is formed on the opposite substrate to face the transparent conductive film on the outside of the area surrounded by the seal material.

7. The liquid crystal display apparatus according to claim 1 ,
wherein the transparent conductive film is formed without openings.

8. The liquid crystal display apparatus according to claim 1 , wherein the transparent conductive film has a first transparent conductive film and a second transparent conductive film, wherein the first transparent conductive film is formed below the second insulation film in at least part of the outside of the area surrounded by the seal material,
wherein the second transparent conductive film is formed above the second insulation film in at least part of the inside of the area surrounded by the seal material and is not formed in the outside of the area surrounded by the seal material, and
wherein a junction part between the first transparent conductive film and the second transparent conductive film has an overlapping part.

9. The liquid crystal display apparatus according to claim 8 , wherein the first transparent conductive film is formed at the same layer as the source wirings, and
wherein the second transparent conductive film is formed at the same layer as a layer above at least one of the pixel electrode and the opposite electrode.

10. The liquid crystal display apparatus according to claim 8 , wherein the first transparent conductive film is formed at the same layer as a layer below′ at least one of the pixel electrode and the opposite electrode, and
wherein the second transparent conductive film is formed at the same layer as a layer above at least one of the pixel electrode and the opposite electrode.

11. The liquid crystal display apparatus according to claim 8 , wherein the first transparent conductive film and the second transparent conductive film are connected in at least one of an area of at the seal material and the inside of the area surrounded by the seal material.

12. The liquid crystal display apparatus according to claim 1 , wherein the transparent conductive film is formed to extend toward the connection terminals beyond a position of an end portion of the opposite substrate in the gate extraction wiring-side, in the outside of the area surrounded by the seal material, as viewed from a plan view.

13. The liquid crystal display apparatus according to claim 1 , wherein the transparent conductive film is connected to the same layer as the extended opposite electrode in the vicinity of an end portion of the display area in the gate extraction wiring-side.

14. The liquid crystal display appears according to claim 1 , wherein the transparent conductive film is formed to extend toward the connection terminals beyond a position of an end portion of a black matrix on an opposite substrate in the gate extraction wiring-side, in the outside of the area surrounded by the seal material, as viewed from a plan view.

Assignees

• Mitsubishi Electric Corp

Inventors

• Nagano Shingo
• Noumi Shigeaki
• Miyakawa Osamu

Classifications

• G02F2001/136218

  Physics · mapped topic

• G02F1/134363

  for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS] · CPC title

• G02F1/1368

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

• G02F1/1345

  Conductors connecting electrodes to cell terminals · CPC title

• G02F1/133345

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