Optical compensatory sheet comprising a biaxially stretched...

Details Optical compensatory sheet comprising a biaxially stretched... Optical compensatory sheet comprising a biaxially stretched...

2006-08-01

2006-08-01

Chowdhury, Tarifur R. (Department: 2871)

Liquid crystal cells, elements and systems

Particular structure

Having significant detail of cell structure only

C349S096000, C349S121000, C428S001100

Reexamination Certificate

active

07084944

ABSTRACT:
An optical compensatory sheet comprises a cellulose acetate film. The film contains 100 weight parts of cellulose acetate having an acetic acid content of 59.0 to 61.5% and 0.01 to 20 weight parts of an aromatic compound having at least two aromatic rings. The cellulose acetate film has an Re retardation value measured at 550 nm (Re550) in the range of 0 to 200 nm and an Rth retardation value measured at 550 nm (Rth550) in the range of 70 to 400 nm. The cellulose acetate film further has a thickness in the range of 10 to 70 μm. The optical compensatory sheet is used in a liquid crystal display.

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