IP Library Granted Patent US 8,724,072
Granted Patent B2
US 8,724,072 · App. 13/771,801 · Granted May 13, 2014

Liquid crystal display device

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Quick Facts
Patent No.
US 8,724,072
App. No.
13/771,801
Filed
Feb 20, 2013
Granted
May 13, 2014
Kind
B2
Art Unit
2871
USPC
349/156
Abstract

A liquid crystal display device with a pair of substrates which are arranged to face each other with liquid crystal therebetween, columnar spacers having the substantially equal height formed on a liquid-crystal-side surface of one substrate, and the columnar spacers include the columnar spacer which is contact with a liquid-crystal-side surface of another substrate and the columnar spacer which is not contact with the liquid-crystal-side surface of another substrate.

Claims (16)

1. A liquid crystal device, comprising:

a first substrate and a second substrate which are arranged to face each other with a liquid crystal layer there between;

a plurality of gate signal lines and a plurality of drain signal lines formed on the first substrate;

a plurality of pixel regions defined by the drain signal lines and the gate signal lines;

at least a thin film transistor formed on the first substrate in each pixel region, each thin film transistor having a first semiconductor layer;

a plurality of column spaces formed on the second substrate including first columnar spacers and second columnar spaces, the columnar spacers being formed on all of the gate signal lines in plain view; and

a second semiconductor layer formed on the gate signal lines, and

wherein the first columnar spacers contact to the first substrate side of the second substrate and the second columnar spacers do not contact to the first substrate side of the second substrate, the first columnar spacers and the second columnar spacers are arranged on the gate signal lines, the first columnar spacers are arranged in a formation region of the second semiconductor layers, and the second columnar spacers are arranged in a non-formation region of the second semiconductor layers.

2. A liquid crystal display device, comprising:

a first substrate and a second substrate which are arranged to face each other with a liquid crystal layer there between;

a plurality of gate signal lines and a plurality of drain signal lines formed on the first substrate;

a plurality of pixel regions defined by the drain signal lines and the gate signal lines;

at least a thin film transistor formed on the first substrate in each pixel region, each thin film transistor having a first semiconductor layer;

a plurality of columnar spaces formed on the second substrate including first columnar spacers and second columnar spacers, the columnar spacers being formed on all of the gate signal lines in plain view;

isolate conducting layers formed on the gate signal lines, and

wherein the first columnar spacers contact to the first substrate side of the second substrate and the second columnar spacers do not contact to the first substrate side of the second substrate, the first columnar spacers and the second columnar spacers are arranged on the gate signal lines, the first columnar spacers are arranged on the gate signal lines, the first columnar spacers are arranged in a formation region of the isolated conducting layers, and the second columnar spacers are arranged in a non-formation region of the isolated conducting layers.

Assignments (6)
NUNC PRO TUNC ASSIGNMENT Recorded Nov 17, 2023
From: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD.
To: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
Reel/Frame 065615/0327 →
CHANGE OF NAME Recorded Nov 12, 2013
From: HITACHI DISPLAYS, LTD.
To: JAPAN DISPLAY EAST INC.
Reel/Frame 031620/0434 →
CHANGE OF NAME Recorded Nov 12, 2013
From: JAPAN DISPLAY EAST INC.
To: JAPAN DISPLAY INC.
Reel/Frame 031620/0499 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 20, 2013
From: ASHIZAWA, KEIICHIRO; NAKATANI, MITSUO; MIWA, HIROAKI; TANAKA, TAKAO; HIRAI, SADAFUMI; KAWABE, SHINICHI; SASAKI, MAKOTO; ITO, KAZUYUKI; IEDA, MASAHIRO
To: HITACHI DISPLAYS, LTD.
Reel/Frame 029841/0274 →
MERGER Recorded Feb 20, 2013
From: IPS ALPHA SUPPORT CO., LTD.
To: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD.
Reel/Frame 029841/0346 →
COMPANY SPLIT DOCUMENTS WHICH CONVEY 50% OWNERSHIP TO EACH OF THE RECEIVING PARTIES Recorded Feb 20, 2013
From: HITACHI DISPLAYS, LTD.
To: HITACHI DISPLAYS, LTD.; IPS ALPHA SUPPORT CO., LTD.
Reel/Frame 029845/0001 →