Optical film and liquid crystal display using the same

Details Optical film and liquid crystal display using the same Optical film and liquid crystal display using the same

2007-04-24

2007-04-24

McPherson, John A. (Department: 1756)

Stock material or miscellaneous articles

Liquid crystal optical display having layer of specified...

With viewing layer of specified composition

C264S001340, C264S216000, C536S065000

Reexamination Certificate

active

10808498

ABSTRACT:
A film for a liquid crystal display comprising a fatty acid cellulose ester film having an acetyl group and a propionyl group is disclosed. Sum of degree of acetyl substitution (DSac) and degree of propionyl substitution (DSpr) of the fatty acid cellulose ester film of the film is 2.8 or less, and a retardation value (Rt value) in the thickness direction define by Formula 1 is 60 to 300 nm.

REFERENCES:
patent: 5695694 (1997-12-01), Iwata et al.
patent: 5856468 (1999-01-01), Shuto et al.
patent: 6630973 (2003-10-01), Matsuoka et al.
patent: 9-090101 (1997-04-01), None

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