Liquid crystal display device

Details Liquid crystal display device Liquid crystal display device

2006-06-20

2006-06-20

Schechter, Andrew (Department: 2871)

Liquid crystal cells, elements and systems

Particular structure

Having significant detail of cell structure only

C349S130000

Reexamination Certificate

active

07064801

ABSTRACT:
An alignment-divided vertical alignment liquid crystal display device permitting improvement in response characteristic while suppressing reduction in contrast ratio is provided. The device has a plurality of pixels each having a first electrode, a second electrode facing the first electrode, and a vertical alignment liquid crystal layer placed between the first and second electrodes. Ribs are placed in a surface portion of the liquid crystal layer close to the first electrode and/or a surface portion thereof close to the second electrode. The ribs have slope side faces put in contact with the liquid crystal layer, and satisfy the relationships RL/PS≧0.05 (μm−1) and RS/PS≦0.05 where RS is the product (RL·RH) of the total length RL of the side faces in a pixel as viewed from the normal to the liquid crystal layer and the height RH of the ribs, and PS is the pixel area.

REFERENCES:
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patent: 2001/0040546 (2001-11-01), Ohmuro et al.
patent: 2002/0159018 (2002-10-01), Kataoka et al.
U.S. Appl. No. 10/898,688, filed Jul. 26, 2004.

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