Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only
Reexamination Certificate
2005-09-13
2005-09-13
Nguyen, Dung T. (Department: 2871)
Liquid crystal cells, elements and systems
Particular structure
Having significant detail of cell structure only
C349S121000, C349S130000, C349S178000
Reexamination Certificate
active
06943858
ABSTRACT:
Liquid crystal display devices include a vertically aligned liquid crystal cell having first and second surfaces that extend opposite each other and contain a liquid crystal material therein having negative dielectric anisotropy. First and second polarizers are attached to the first and second surfaces of the liquid crystal cell, respectively. A first a-plate compensation film and a first c-plate compensation film are provided. These films are disposed between the first surface of the liquid crystal cell and the first polarizer. The direction having a largest refractive index in the first a-plate compensation film is parallel to or perpendicular to a polarizing direction of the first polarizer. Moreover, a difference between a summation of a retardation (nx21−nza1)×da1of the first a-plate compensation film, a retardation (nxc1−nzc1)×dc1of the first c-plate compensation film and a retardation of the first and the second polarizers and a retardation due to birefringence of the liquid crystal cell is equal to or less than 15% of the retardation value due to birefringence of the liquid crystal cell.
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Hashimoto, T. et al. TN-LCD with Quartered Subpixels Using Polarized UV-Light-Irradiated Polymer Orientation Films,SID 95 Digest, pp. 877-880.
Chen Jian-Min
Kim Kyeong-Hyeon
Lee Hea-Ri
Lyu Jae-Jin
McGuireWoods LLP
Nguyen Dung T.
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