Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only
Reexamination Certificate
2005-11-29
2005-11-29
Kim, Robert H. (Department: 2871)
Liquid crystal cells, elements and systems
Particular structure
Having significant detail of cell structure only
C349S113000, C349S117000, C349S118000, C349S119000, C349S120000, C349S121000, C349S122000
Reexamination Certificate
active
06970218
ABSTRACT:
The present invention provides a liquid crystal display device. An optical film having negative uniaxial double refractive index ellipsoids is arranged below a semi-transmitting liquid crystal display cell and, thereafter, a λ/4 phase difference plate, a λ/2 phase difference plate and a polarizer are arranged. The orientation axis direction of the optical film having negative uniaxial double refractive index ellipsoids is substantially equal to the direction which is rotated by 90° in the clockwise direction from a resultant vector of the orientation axis direction of the upper orientation film and the orientation axis direction of the lower orientation film of the liquid crystal display cell. Further, phase lagging axis of the upper and lower λ/4 phase difference plate is set substantially equal to the orientation axis direction of the optical film having negative uniaxial double refractive index ellipsoids.
REFERENCES:
patent: 5753937 (1998-05-01), Shimomaki et al.
patent: 6778242 (2004-08-01), Murayama et al.
patent: 6819379 (2004-11-01), Kubo et al.
patent: 7-333598 (1994-06-01), None
Fukuda Koichi
Nakamura Yoshiaki
A. Marquez, Esq. Juan Carlos
Chien Lucy
Fisher Esq. Stanley P.
Hitachi Displays Ltd.
Kim Robert H.
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