IP Library Granted Patent US 7,251,005
Granted Patent B2
US 7,251,005 · App. 11/002,896 · Granted Jul 31, 2007

Liquid crystal display device comprising two counter voltage signal lines having two branches in each pixel region

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Quick Facts
Patent No.
US 7,251,005
App. No.
11/002,896
Granted
Jul 31, 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 formed on the first substrate in each pixel region so as to enable an electric field to be formed therebetween. The counter electrode is of planar shape and made of a transparent conductor. The counter voltage signal line is made of metal and has a branch in each pixel region with the counter electrode being directly connected to the branch.

Claims (14)

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 formed on the first substrate in each pixel region so as to enable an electric field to be formed therebetween;

wherein the counter electrode is of planar shape and made of a transparent conductor; and

wherein one of the pixel regions includes two of the counter voltage signal lines, each of the counter voltage signal lines being made of metal and having two branches in each pixel region, the counter electrode being directly connected to the counter voltage signal lines and the branches.

2. A liquid crystal display device according to claim 1 , wherein each of the branches is provided in a layer which is above a layer of the counter electrode.

3. A liquid crystal display device according to claim 2 , wherein a width of each of the branches is larger than a thickness of the counter electrode.

4. A liquid crystal display device according to claim 1 , wherein each of the branches extends in parallel to the drain signal line.

5. A liquid crystal display device according to claim 1 , wherein a thickness of a portion of each of the branches is larger than a thickness of the counter electrode.

6. A liquid crystal display device according to claim 5 , wherein a thickness of each of the branches in a portion in nonoverlapping relation with the counter electrode is larger than a thickness of the counter electrode.

7. A liquid crystal display device according to claim 1 , wherein edges of the counter electrode are covered by the counter voltage signal lines and the branches.

Assignments (6)
CHANGE OF NAME Recorded Aug 12, 2020
From: HITACHI DISPLAYS, LTD.
To: JAPAN DISPLAY EAST, INC.
Reel/Frame 053464/0009 →
CHANGE OF NAME Recorded Aug 12, 2020
From: JAPAN DISPLAY EAST, INC.
To: JAPAN DISPLAY, INC.
Reel/Frame 053465/0807 →
CHANGE OF ADDRESS Recorded Aug 12, 2020
From: JAPAN DISPLAY, INC.
To: JAPAN DISPLAY, INC.
Reel/Frame 053465/0864 →
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 →