Optical film, and polarizing plate and liquid crystal...

Details Optical film, and polarizing plate and liquid crystal... Optical film, and polarizing plate and liquid crystal...

2006-09-18

2008-10-07

Visconti, Geraldina (Department: 1795)

Stock material or miscellaneous articles

Liquid crystal optical display having layer of specified...

C430S020000, C430S270100, C252S299010

Reexamination Certificate

active

07431972

ABSTRACT:
An optical film comprising an optically anisotropic layer including a liquid crystalline compound, wherein the optically anisotropic layer satisfies the following formulae:in-line-formulae description="In-line Formulae" end="lead"?Re(450)/Re(650)<1.25:   Formula (1)in-line-formulae description="In-line Formulae" end="tail"?wherein Re(450) and Re(650) are in-plane retardation values (unit: nm) of the optically anisotropic layer at wavelengths of 450 nm and 650 nm, respectively;in-line-formulae description="In-line Formulae" end="lead"?0.09<Re—m(550)/d:   Formula (2)in-line-formulae description="In-line Formulae" end="tail"?wherein Re_m(550) is an in-plane retardation value (unit: nm) of a uniaxial alignment layer in which the director of the liquid crystalline compound is aligned to be parallel in the plane at a wavelength of 550 nm, and d is the thickness of the uniaxial alignment layer (unit: nm).

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