IP Library Granted Patent US 7,612,855
Granted Patent B2
US 7,612,855 · App. 12/359,636 · Granted Nov 3, 2009

Liquid crystal display device

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Quick Facts
Patent No.
US 7,612,855
App. No.
12/359,636
Granted
Nov 3, 2009
Kind
B2
Abstract

A liquid crystal display device includes a pair of substrates with a liquid crystal layer therebetween, and a plurality of pixel regions defined by gate signal lines and drain signal lines. A counter electrode which is planar with a substantially rectangular shape is formed on each pixel region, with a pixel electrode having a plurality of slits in overlapping relationship with the counter electrode. A counter voltage signal line is formed in parallel with the gate signal lines and connected with the counter electrode, a first contact hole for connecting the pixel electrode and a source electrode, a connection line and second and third contact holes are provided. The counter electrode is arranged so as to not overlap the first contact hole.

Claims (21)

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 defined by the gate signal lines and the drain signal lines;

a counter electrode which is formed on each pixel region, the counter electrode being planar and having a substantially rectangular shape;

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

a counter voltage signal line which is formed in parallel with the gate signal lines and is connected with the counter electrode;

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

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

a second contact hole for connecting the counter electrode and the connection line; and

a third contact hole for connecting the counter electrode of the next pixel region and the connection line;

wherein the counter electrode is not overlapped with 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 the counter voltage signal line is arranged to traverse the pixel region.

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

6. A liquid crystal display device according to claim 1 , wherein a conductive film is formed between the second contact hole and the counter electrode.

7. A liquid crystal display device according to claim 6 , wherein the conductive film is an opaque material.

8. A liquid crystal display device according to claim 1 , wherein a conductive film is formed between the third contact hole and the counter electrode.

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

10. A liquid crystal display device according to claim 1 , wherein the slits of the pixel electrode is not overlapped with the second and third contact hole.

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 →