Liquid crystal display device and method for manufacturing the same

Patent metadata

Field	Value
Publication number	US-9664932-B2
Application number	US-201615138404-A
Country	US
Kind code	B2
Filing date	Apr 26, 2016
Priority date	Oct 22, 2012
Publication date	May 30, 2017
Grant date	May 30, 2017

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 where a first substrate provided with a plurality of pixel electrodes arranged in a matrix, a plurality of thin film transistors connected to each pixel electrode, a plurality of signal lines, and a second substrate formed with a transparent electrode on a surface opposite to a surface facing to the first substrate, and liquid crystal is sealed between the both substrates, comprising:
a terminal area of the first substrate having
an inspection pad that are connected to the respective signal lines,
a plurality of terminals connected to the respective inspection pads,
a plurality of switching devices between the inspection pads and the signal lines, the switching devices switches the connection state of the inspection pads and the signal lines;
a conductive tape that electrically connects the transparent electrode of the second substrate and the inspection pads of the first substrate, and
a mark for a conductive tape stuck position.

2. The liquid crystal display device according to claim 1 , wherein some of the plurality of inspection pads are covered with the conductive tape; and some others are exposed.

3. The liquid crystal display device according to claim 1 , wherein the first substrate has a driver IC, the plurality of inspection pads are arranged at a position not overlapping with the driver IC, and the plurality of the switching devices are formed in the driver IC.

4. The liquid crystal display device according to claim 3 , comprising:
a terminal for supplying an electric potential to the switching devices for a closed state during inspection; and
a terminal for supplying an electric potential to the switching devices for an open state when it is the product.

5. The liquid crystal display device according to claim 4 , wherein electric potential of the switching device in the open state is supplied from the driver IC.

Assignees

• Japan Display Inc

Inventors

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

Classifications

• G02F2202/99

  Physics · mapped topic

• G02F1/1368

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

• G02F1/1309 Primary

  Repairing; Testing · CPC title

• G02F2203/69

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

• G02F1/13454

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