Liquid crystal display device and method for manufacturing the same

Patent metadata

Field	Value
Publication number	US-10042193-B2
Application number	US-201715493203-A
Country	US
Kind code	B2
Filing date	Apr 21, 2017
Priority date	Oct 22, 2012
Publication date	Aug 7, 2018
Grant date	Aug 7, 2018

Abstract

An object of the present invention is to protect exposed inspection pads with a conductive tape when the application of resin is ceased and to enhance the reliability of the inspection pads. A liquid crystal display device is provided with a transparent electrode formed on a superficial side of a CF board, a grounded electrode, an inspection pad and a switching device between the inspection pad and a signal line or a scanning line respectively formed in a terminal area a TFT board and a conductive tape that electrically connects the transparent electrode of the CF board, the grounded electrode and the inspection pad respectively of the TFT board.

First claim

What is claimed is:

1. A liquid crystal display device comprising:
a TFT substrate provided with a pixel electrode arranged in a matrix, a thin film transistor connected to each pixel electrode, a plurality of scanning lines and a plurality of signal lines,
a CF substrate provided with a color filter,
a liquid crystal layer sandwiched between the TFT substrate and the CF substrate,
a transparent electrode layer formed on an outer surface of the CF substrate;
an identification metal layer for identifying a panel, wherein the identification metal layer is formed in a terminal area of the TFT substrate; and
a conductive tape overlapping the transparent electrode of the CF substrate and the identification metal layer of the TFT substrate,
wherein an inspection pad, a switching element for controlling a connection between the inspection pad and the signal line or a connection between the inspection pad and the scanning line are formed in the terminal area,
wherein the inspection pad and the identification metal layer are formed on the same layer on the TFT substrate, and
wherein an insulating layer is formed on the inspection pad and the identification metal layer, the insulating layer has an opening at a position of the inspection pad.

2. The liquid crystal display device according to claim 1 , wherein a mark for identification of the panel is formed in the identification metal layer.

3. The liquid crystal display device according to claim 1 ,
wherein the inspection pad is disposed adjacent to the identification metal layer.

4. The liquid crystal display device according to claim 1 , wherein the liquid crystal display device is an In-Plane Switching type liquid crystal display device.

5. The liquid crystal display device according to claim 1 ,
wherein a transparent conductive film is formed above the inspection pad via an insulating film, and
the transparent conductive film is connected to the inspection pad in a contact hole in the insulating film.

6. A liquid crystal display device comprising:
a TFT substrate provided with a pixel electrode arranged in a matrix, a thin film transistor connected to each pixel electrode, a plurality of scanning lines and a plurality of signal lines,
a CF substrate provided with a color filter,
a liquid crystal layer sandwiched between the TFT substrate and the CF substrate,
a transparent electrode layer formed on an outer surface of the CF substrate;
an identification metal layer for identifying a panel, wherein the identification metal layer is formed in a terminal area of the TFT substrate; and
a conductive tape overlapping the transparent electrode of the CF substrate and the identification metal layer of the TFT substrate,
wherein an inspection pad and the identification metal layer are formed on the same layer on the TFT substrate, and
wherein an insulating layer is formed on the inspection pad and the identification metal layer, the insulating layer has an opening at a position of the inspection pad.

7. The liquid crystal display device according to claim 6 , wherein a mark for identification of the panel is formed in the identification metal layer.

8. The liquid crystal display device according to claim 6 , wherein the liquid crystal display device is an In-Plane Switching type liquid crystal display device.

9. The liquid crystal display device according to claim 6 , wherein a transparent conductive film is formed above the inspection pad via an insulating film, and
the transparent conductive film is connected to the inspection pad in a contact hole in the insulating film.

Assignees

• Japan Display Inc

Inventors

• Nishino Tomonori
• Yanagisawa Syou
• Agata Kentaro
• Ishige Nobuyuki

Classifications

• G02F1/1309 Primary

  Repairing; Testing · CPC title

• G02F2203/69

  Arrangements or methods for testing or calibrating a device · CPC title

• G02F2201/123

  pixel · CPC title

• G02F1/1368

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

• G02F1/13439

  characterised by their electrical, optical, physical properties; materials therefor; method of making · CPC title