IP Library Granted Patent US 9,360,715
Granted Patent B2
US 9,360,715 · App. 14/399,033 · Granted Jun 7, 2016

Liquid crystal display device

Inventors: Katsuhiko Morishita (Osaka, JP); Takehiko Sakai (Osaka, JP); Shogo Nishiwaki (Osaka, JP); Masashi Chino (Osaka, JP); Masatoshi Kondo (Osaka, JP)
Assignee: Sharp Kabushiki Kaisha
G02F1/134309G02F1/1368G02F1/133345G02F1/134363G02F1/136286G02F1/133707G02F1/133753G02F2001/134372
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Quick Facts
Patent No.
US 9,360,715
App. No.
14/399,033
Granted
Jun 7, 2016
Kind
B2
Abstract

The present invention provides an FFS-mode liquid crystal display device which can prevent trace unevenness during white screen display. The present invention provides a liquid crystal display device including: a pair of substrate; and a liquid crystal layer interposed between the pair of substrates, wherein one of the pair of substrates includes a scanning signal line, a data signal line, pixel electrodes with a comb-tooth portion, a plate-like common electrode, and an interlayer insulating film provided between the pixel electrodes and the common electrode, the comb-tooth portion of each of the pixel electrodes includes a straight portion and a bent portion, the bent portion is provided at least at one end of the comb-tooth portion, and the interlayer insulating film is thinner at a position overlapping with the bent portion than at a position overlapping with the straight portion.

Claims (18)

1. A liquid crystal display device comprising:

a pair of substrates; and

a liquid crystal layer interposed between the pair of substrates,

wherein one of the pair of substrates includes a scanning signal line, a data signal line, pixel electrodes with a comb-tooth portion, a plate-like common electrode, and an interlayer insulating film provided between the pixel electrodes and the common electrode,

the comb-tooth portion of each of the pixel electrodes includes a straight portion and a bent portion,

the bent portion is provided at least at one end of the comb-tooth portion, and

the interlayer insulating film is thinner at a position overlapping with the bent portion than at a position overlapping with the straight portion.

2. The liquid crystal display device according to claim 1 ,

wherein the bent portion is provided at both ends of the comb-tooth portion.

3. The liquid crystal display device according to claim 1 ,

wherein the bent portion is provided at the center of the comb-tooth portion.

4. The liquid crystal display device according to claim 1 ,

wherein an angle γ formed between a major axis orientation of the bent portion and an extending orientation of the scanning signal line and an angle β formed between an orientation of alignment and the scanning signal line satisfy a relationship of (135−β)°<γ<90°.

5. The liquid crystal display device according to claim 1 ,

wherein the pixel electrodes are arranged side by side with the scanning signal line or the data signal line therebetween, and

the interlayer insulating film is thicker at a position between the pixel electrodes arranged side by side than at a position overlapping with the comb-tooth portion of each of the pixel electrodes.

6. The liquid crystal display device according to claim 1 , further comprising

a voltage applying means that sets potentials of the pixel electrodes adjacent to each other have opposite polarity based on a potential of the common electrode.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Nov 5, 2014
From: MORISHITA, KATSUHIKO; SAKAI, TAKEHIKO; NISHIWAKI, SHOGA; CHINO, MASASHI; KONDO, MASATOSHI
To: SHARP KABUSHIKI KAISHA
Reel/Frame 034108/0083 →
Priority Claims (1)
JP 2012-108793 · May 10, 2012 · national
Continuity (1)
Related Publication 20150116644A1 · Apr 30, 2015