IP Library Granted Patent US 10,371,991
Granted Patent B2
US 10,371,991 · App. 16/039,046 · Granted Aug 6, 2019

Liquid crystal display device

Inventors: Keiichiro Ashizawa (Mobara, JP); Mitsuo Nakatani (Mobara, JP); Hiroaki Miwa (Yokohama, JP); Takao Tanaka (Yachimata, JP); Sadafumi Hirai (Mobara, JP); Shinichi Kawabe (Yokohama, JP); Makoto Sasaki (Mobara, JP); Kazuyuki Ito (Mobara, JP); Masahiro Ieda (Oomishirasato, JP)
Assignees: Japan Display Inc.; Panasonic Liquid Crystal Display Co., Ltd.
G02F1/13394G02F1/1339G02F1/133512G02F1/134363G02F1/1368G02F1/136286G02F2001/13396
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Quick Facts
Patent No.
US 10,371,991
App. No.
16/039,046
Granted
Aug 6, 2019
Kind
B2
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 (20)

1. A liquid crystal display device comprising:

a first substrate and a second substrate with a liquid crystal layer therebetween;

a plurality of spacers disposed on the first substrate; and

a plurality of gate signal lines and a plurality of drain signal lines, the gate signal lines and the drain signal lines being disposed on the second substrate,

wherein the plurality of spacers counter the plurality of gate signal lines, and

at least one spacer among the plurality of spacers counters a stacked region where a semiconductor layer, a gate signal line among the plurality of gate signal lines, and a metal layer overlap with each other.

2. The liquid crystal display device according to claim 1 , wherein

the semiconductor layer is stacked on the gate signal line, and the metal layer is stacked on the semiconductor layer.

3. The liquid crystal display device according to claim 1 , wherein

the semiconductor layer is disposed between the gate signal line and the metal layer.

4. The liquid crystal display device according to claim 1 , wherein

at least a part of the metal layer protrudes from the semiconductor layer in plan view.

5. The liquid crystal display device according to claim 1 , wherein

at least a part of the metal layer protrudes from the gate line in plan view.

6. The liquid crystal display device according to claim 1 , wherein

in a cross sectional view, a dimension of the metal layer is longer than a dimension of the semiconductor layer.

7. The liquid crystal display device according to claim 1 , wherein

in a cross sectional view, a dimension of the metal layer is longer than a dimension of the gate line.

8. The liquid crystal display device according to claim 1 , wherein the plurality of spacers are columnar spacers.

9. The liquid crystal display device according to claim 1 , wherein a pixel electrode and a counter electrode are disposed on the second substrate.

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 Feb 17, 2019
From: JAPAN DISPLAY EAST INC.
To: JAPAN DISPLAY INC.
Reel/Frame 048357/0217 →
CHANGE OF NAME Recorded Feb 17, 2019
From: HITACHI DISPLAYS, LTD.
To: JAPAN DISPLAY EAST INC.
Reel/Frame 048357/0251 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 17, 2019
From: HITACHI DISPLAYS, LTD.
To: HITACHI DISPLAYS, LTD.; IPS ALPHA SUPPORT CO., LTD.
Reel/Frame 048357/0285 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 17, 2019
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 048358/0219 →
MERGER Recorded Feb 17, 2019
From: IPS ALPHA SUPPORT CO., LTD.
To: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD.
Reel/Frame 048358/0236 →
Priority Claims (1)
JP 2003-365378 · Oct 27, 2003 · national
Continuity (9)
Continuation 15394082 · Dec 29, 2016
Continuation 14718210 · May 21, 2015
Continuation 14229646 · Mar 28, 2014
Continuation 13771801 · Feb 20, 2013
Continuation 12926769 · Dec 8, 2010
Continuation 12458090 · Jun 30, 2009
Continuation 12149581 · May 5, 2008
Continuation 10969042 · Oct 21, 2004
Related Publication 20180321537A1 · Nov 8, 2018