Optical cellulose acylate film, polarizing plate and liquid...

Details Optical cellulose acylate film, polarizing plate and liquid... Optical cellulose acylate film, polarizing plate and liquid...

2011-04-19

2011-04-19

Hon, Sophie (Department: 1798)

Stock material or miscellaneous articles

Liquid crystal optical display having layer of specified...

With viewing layer of specified composition

C428S001310, C428S001330, C349S096000, C349S117000, C349S118000

Reexamination Certificate

active

07927672

ABSTRACT:
A cellulose acylate film is provided and is excellent in increasability of an in-plane retardation and a retardation in a thickness direction, from which an additive does not bleed out, and which is excellent in surface properties. The cellulose acylate film has a thickness of 40 μm to 180 μm and contains no retardation increasing agent. Retardation values Re and Rth of the cellulose acylate film meet the following formulae (III) to (V):in-line-formulae description="In-line Formulae" end="lead"?46≦Re≦100  (III)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?Rth=a−5.9Re  (IV)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?520≦a≦670  (V)in-line-formulae description="In-line Formulae" end="tail"?A polarizing plate and a VA mode liquid crystal display having wide viewing angle characteristics and small changes in color, which are using the cellulose acylate film, are provided.

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