IP Library Granted Patent US 7,248,324
Granted Patent B2
US 7,248,324 · App. 10/939,941 · Granted Jul 24, 2007

Liquid crystal display device

Assignee: Hitachi, Ltd.
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Quick Facts
Patent No.
US 7,248,324
App. No.
10/939,941
Granted
Jul 24, 2007
Kind
B2
Abstract

A liquid crystal display device having first and second substrates with a liquid crystal layer therebetween, a plurality of gate signal lines and a plurality of drain signal lines, a plurality of counter voltage signal lines, a plurality of pixel regions defined by neighboring gate signal lines and drain signal lines and a counter electrode and a pixel electrode being formed on the first substrate in each pixel region and enabling forming of an electric field therebetween. The counter electrode is of planar shape and, the pixel electrode is of planar shape with plurality of slits and is overlapped with the counter electrode with an insulating layer provided therebetween. Both the counter electrode and pixel electrode are made of a transparent conductor. The counter voltage signal line is made of metal and extends in center region in each pixel region and is directly connected to the counter electrode.

Claims (19)

1. A liquid crystal display device comprising:

first and second substrates with a liquid crystal layer therebetween;

a plurality of gate signal lines and a plurality of drain signal lines;

a plurality of counter voltage signal lines;

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

a counter electrode and a pixel electrode being formed on the first substrate in each pixel region and enabling an electric field to be formed therebetween;

wherein the counter electrode is of planar shape, the pixel electrode is of planar shape with a plurality of slits and being overlapped with the counter electrode and an insulating layer being provided therebetween, both the counter electrode and the pixel electrode being made of a transparent conductor, and the counter voltage signal line being made of metal extends in a center region in each pixel region and is directly connected to the counter electrode; and

wherein the plurality of slits of the pixel electrode have portions which do not extend in parallel to an extending direction of the drain signal lines and an extending direction of the gate signal lines.

2. A liquid crystal display device according to claim 1 , wherein the counter voltage signal line crosses the gate signal lines.

3. A liquid crystal display device according to claim 1 , wherein the counter voltage signal line crosses the drain signal lines.

4. A liquid crystal display device according to claim 1 , wherein the extending directions of the plurality of slits of the pixel electrode on one side of the counter voltage signal line are different from the extending directions of the slits of the pixel electrode on another side of the counter voltage signal line.

5. A liquid crystal display device comprising:

first and second substrate with a liquid crystal layer therebetween;

a plurality of gate signal lines and a plurality of drain signal lines;

a plurality of counter voltage signal lines;

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

a counter electrode and a pixel electrode being formed on the first substrate in each pixel region and enabling an electric field to be formed therebetween;

wherein the counter electrode is of planar shape, the pixel electrode is of planar shape with a plurality of slits and being overlapped with the counter electrode and an insulating layer being provided therebetween, both the counter electrode and the pixel electrode are made of a transparent conductor, and the counter voltage signal line being made of metal extends in each pixel region and is directly connected to the counter electrode, and the counter electrode exists at opposite sides of the counter voltage signal line in the pixel region when viewed in plane view; and

wherein the plurality of slits of the pixel electrode have portions which do not extend in parallel to an extending direction of the drain signal lines and an extending direction of the gate signal lines.

Assignments (5)
CHANGE OF NAME Recorded Dec 4, 2013
From: JAPAN DISPLAY EAST, INC.
To: JAPAN DISPLAY INC.
Reel/Frame 031763/0920 →
CHANGE OF NAME Recorded Dec 3, 2013
From: HITACHI DISPLAYS, LTD.
To: JAPAN DISPLAY EAST, INC.
Reel/Frame 031751/0261 →
COMPANY SPLIT PLAN TRANSFERRING FIFTY (50) PERCENT SHARE OF PATENTS AND PATENT APPLICATIONS Recorded Dec 12, 2011
From: HITACHI DISPLAYS, LTD.
To: IPS ALPHA SUPPORT CO., LTD.
Reel/Frame 027362/0466 →
COMPANY SPLIT PLAN TRANSFERRING ONE HUNDRED (100) PERCENT SHARE OF PATENT AND PATENT APPLICATIONS Recorded Dec 12, 2011
From: HITACHI, LTD.
To: HITACHI DISPLAYS, LTD.
Reel/Frame 027362/0612 →
MERGER/CHANGE OF NAME Recorded Dec 12, 2011
From: IPS ALPHA SUPPORT CO., LTD.
To: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD.
Reel/Frame 027363/0315 →
Priority Claims (1)
JP 11-252763 · Sep 7, 1999 · national
Continuity (2)
Continuation 1007053800
Related Publication 20050030461A1 · Feb 10, 2005