IP Library Granted Patent US 8,064,030
Granted Patent B2
US 8,064,030 · App. 12/122,236 · Granted Nov 22, 2011

Liquid crystal display device with common electrode line and seal member at different positions

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Quick Facts
Patent No.
US 8,064,030
App. No.
12/122,236
Granted
Nov 22, 2011
Kind
B2
Abstract

A liquid crystal display device includes an array of pixels each including a plurality of sub-pixels, a plurality of pixel electrodes disposed in the respective sub-pixels, and a plurality of common electrodes disposed in the respective sub-pixels. The common electrode disposed in each of the sub-pixels in one of the pixels on each row is connected to the common electrodes disposed in the corresponding sub-pixels in the others of the pixels on the each row, to form a group of common electrodes connected together.

Claims (27)

1. A liquid crystal display device comprising:

an array of pixels each including a plurality of sub-pixels;

a plurality of pixel electrodes each disposed in a corresponding one of said sub-pixels; and

a plurality of common electrodes each disposed in a corresponding one of said sub-pixels to oppose a corresponding one of said pixel electrodes, wherein:

one of said common electrodes disposed in each of the sub-pixels in one of said pixels on each row is connected to others of said common electrodes disposed in corresponding sub-pixels in the others of said pixels arranged on said each row, to form a group of common electrodes connected together and wherein said pixels each include a transmissive area,

said liquid crystal display device further comprises a first peripheral common-electrode line connecting together corresponding common-electrode lines each connected to said group of common electrodes corresponding to said transmissive area,

wherein said first peripheral common-electrode line includes a first portion configured by a gate line and disposed outside of a seal member which encapsulates a liquid crystal layer in said liquid crystal display device, and a second portion configured by a data line and disposed inside of said seal member.

2. The liquid crystal display device according to claim 1 , wherein said group of common electrodes is connected to a corresponding common-electrode line extending adjacent to said each row.

3. The liquid crystal display device according to claim 1 , wherein said common-electrode line connected to said group of common electrodes in said each row is connected to corresponding common-electrode lines connected to a corresponding group of common electrodes in other rows via a corresponding peripheral common-electrode line at an end of said common-electrode line.

4. The liquid crystal display device according to claim 1 , wherein said sub-pixels in each of said pixels include at least a first sub-pixel and a second sub-pixel.

5. The liquid crystal display device according to claim 4 , wherein said pixels each include a reflective area and a transmissive area, said first sub-pixel corresponds to said reflective area and said second sub-pixel corresponds to said transmissive area.

6. The liquid crystal display device according to claim 5 , wherein a first peripheral common-electrode line is disposed inside of a second peripheral common-electrode line connecting together corresponding common-electrode lines connected to said group of common electrodes corresponding to said reflective area.

7. The liquid crystal display device according to claim 6 , wherein a gate signal line extends between said first peripheral common-electrode line and said second peripheral common-electrode line.

8. The liquid crystal display device according to claim 6 , wherein a first common-electrode signal is supplied via a gate line inversion drive to a first common electrode group, and a second common-electrode signal is supplied via a gate line drive to a second common electrode group.

9. The liquid crystal display device according to claim 6 , wherein one of a first common-electrode signal applied to said first peripheral common-electrode line and a second common-electrode signal applied to said second peripheral common-electrode line is obtained by inverting the other of said first and second common-electrode signals.

10. The liquid crystal display device according to claim 8 , wherein one of said first and second common-electrode signals has a center value of a signal amplitude which is different from a center value of a signal amplitude of the other of said first and second common-electrode signals.

11. The liquid crystal display device according to claim 8 , one of said first and second common-electrode signals has an amplitude larger than an amplitude of the other of said first and second common-electrode signals.

12. A terminal unit comprising the liquid crystal display device according to claim 1 .

13. A liquid crystal display device comprising:

an array of pixels each including a plurality of sub-pixels;

a plurality of pixel electrodes each disposed in a corresponding one of said sub-pixels; and

a plurality of common electrodes each disposed in a corresponding one of said sub-pixels to oppose a corresponding one of said pixel electrodes, wherein:

one of said common electrodes disposed in each of the sub-pixels in one of said pixels on each row is connected to others of said common electrodes disposed in corresponding sub-pixels in the others of said pixels arranged on said each row, to form a group of common electrodes connected together, and wherein said pixels each include a reflective area and a transmissive area;

said liquid crystal display device further comprises a first peripheral common-electrode line connecting together corresponding common-electrode lines each connected to said group of common electrodes corresponding to said transmissive area, and a second peripheral common-electrode line connecting together corresponding common-electrode lines connected to said group of common electrodes corresponding to said reflective area,

wherein said sub-pixels in each of said pixels include at least a first sub-pixel and a second sub-pixel, said first sub-pixel corresponds to said reflective area and said second sub-pixel corresponds to said transmissive area,

wherein a gate signal line extends between said first peripheral common-electrode line and said second peripheral common-electrode line.

14. A terminal unit comprising the liquid crystal display device according to claim 13 .

Assignments (2)
CHANGE OF NAME Recorded Nov 8, 2011
From: NEC LCD TECHNOLOGIES, LTD.
To: NLT TECHNOLOGIES, LTD.
Reel/Frame 027190/0060 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 22, 2008
From: SAKAMOTO, MICHIAKI; MORI, KENICHI; NAKA, KENICHIROU; NAGAI, HIROSHI
To: NEC LCD TECHNOLOGIES, LTD.
Reel/Frame 021274/0954 →