Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only
Reexamination Certificate
2005-10-25
2005-10-25
Schechter, Andrew (Department: 2871)
Liquid crystal cells, elements and systems
Particular structure
Having significant detail of cell structure only
C349S117000, C349S118000, C349S119000, C349S120000
Reexamination Certificate
active
06958797
ABSTRACT:
An optical film in which a function of a brightness enhancement film is maintained and variations in brightness and chromaticity within a film plane are suppressed is provided. An optical film is a laminate of an absorptive dichroic polarizing plate and a brightness enhancement film. A maximum chromaticity difference Δxy(max) of in-plane transmitted light is 0.008 or smaller after the optical film is attached to a glass plate and allowed to stand at 70° C. for 120 hours. The brightness enhancement film includes a layer having a circularly polarized light separating function, and a quarter wavelength plate. The quarter wavelength plate is a film showing an in-plane retardation (Δnd) satisfying Δnd(450 nm)/Δnd(550 nm)<1.02 or a film containing a polymer having a photoelastic coefficient of 40×10−12m2/N or smaller.
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Kawahara Satoru
Kawamoto Ikuo
Motomura Hironori
Takahashi Naoki
Nitto Denko Corporation
Schechter Andrew
Westerman Hattori Daniels & Adrian LLP
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