IP Library Granted Patent US 7,486,345
Granted Patent B2
US 7,486,345 · App. 12/052,304 · Granted Feb 3, 2009

Liquid crystal display device

Assignee: Hitachi Device Engineering Co., Ltd.
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Quick Facts
Patent No.
US 7,486,345
App. No.
12/052,304
Granted
Feb 3, 2009
Kind
B2
Abstract

A liquid crystal display device includes a pair of substrates which face each other with a liquid crystal layer therebetween, a plurality of gate signal lines and a plurality of drain signal lines, and a plurality of pixel regions which are formed on one substrate. A planar counter electrode which is formed on each pixel region, and a pixel electrode having a plurality of slits is formed in overlapping relation with the counter electrode. A first contact hole is provided for connecting the pixel electrode and a source electrode, and a connection line is provided for connecting the counter electrode of one pixel region and the counter electrode of an adjacent next pixel region. The counter electrode has a notch in the position of the first contact hole.

Claims (22)

1. A liquid crystal display device comprising:

a pair of substrates which face each other with a liquid crystal layer therebetween:

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

a plurality of pixel regions which are formed on one substrate;

a planar counter electrode which is formed on each pixel region; and

a pixel electrode having a plurality of slits is formed in overlapping relation with the counter electrode;

a first contact hole for connecting the pixel electrode and a source electrode; and

a connection line for connecting the counter electrode of one pixel region and the counter electrode of an adjacent next pixel region;

wherein the counter electrode has a notch in the position of the first contact hole.

2. A liquid crystal display device according to claim 1 , wherein the counter electrode is a transparent electrode.

3. A liquid crystal display device according to claim 1 , wherein the pixel electrode is a transparent electrode.

4. A liquid crystal display device according to claim 1 , wherein a counter voltage signal line is connected with the counter electrode, the counter voltage signal line being arranged to traverse the pixel region.

5. A liquid crystal display device according to claim 4 , wherein an initial orientation direction of the liquid crystal layer is parallel to the counter voltage signal line.

6. A liquid crystal display device according to claim 1 , wherein an initial orientation direction of the liquid crystal layer is parallel to the gate signal lines.

7. A liquid crystal display device according to claim 1 , further comprising:

a second contact hole; and

a third contact hole;

wherein the second contact hole and the third contact hole are each connected to a different counter electrode.

8. A liquid crystal display device according to claim 7 , wherein a conductive film is formed between the second contact hole and the counter electrode.

9. A liquid crystal display device according to claim 8 , wherein the conductive film is opaque.

10. A liquid crystal display device according to claim 7 , wherein a conductive film is formed between the third contact hole and the counter electrode.

11. A liquid crystal display device according to claim 10 , wherein the conductive film is opaque.

Assignments (6)
CHANGE OF NAME Recorded Nov 17, 2023
From: HITACHI DISPLAYS, LTD.
To: JAPAN DISPLAY EAST, INC.
Reel/Frame 065614/0223 →
CHANGE OF NAME Recorded Nov 17, 2023
From: JAPAN DISPLAY EAST, INC.
To: JAPAN DISPLAY, INC.
Reel/Frame 065614/0644 →
CHANGE OF ADDRESS Recorded Nov 17, 2023
From: JAPAN DISPLAY, INC.
To: JAPAN DISPLAY, INC.
Reel/Frame 065654/0250 →
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 →
COMPANY SPLIT PLAN TRANSFERRING FIFTY (50) PERCENT SHARE OF PATENTS Recorded Oct 14, 2011
From: HITACHI DISPLAYS, LTD.
To: IPS ALPHA SUPPORT CO., LTD.
Reel/Frame 027063/0019 →
MERGER Recorded Oct 14, 2011
From: IPS ALPHA SUPPORT CO., LTD.
To: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD.
Reel/Frame 027063/0139 →
Priority Claims (1)
JP 2003-389024 · Nov 19, 2003 · national
Continuity (2)
Continuation 1099138000 · Nov 19, 2004
Related Publication 20080170194A1 · Jul 17, 2008