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

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

2011-04-19

2011-04-19

Hahm, Sarah (Department: 2874)

Liquid crystal cells, elements and systems

Particular structure

Having significant detail of cell structure only

C349S119000

Reexamination Certificate

active

07929087

ABSTRACT:
The present invention provides an optical film which includes at least a first optically anisotropic layer, and a second optically anisotropic layer, wherein the first optically anisotropic layer satisfies the following Expression (1), the second optically anisotropic layer satisfied the following Expression (2), and a slow axis of the first optically anisotropic layer is orthogonal to a slow axis of the second optically anisotropic layer,in-line-formulae description="In-line Formulae" end="lead"?0≦Re(450)/Re(550)≦0.5   Expression (1)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?0.95≦Re(450)/Re(550)≦1.05   Expression (2)in-line-formulae description="In-line Formulae" end="tail"?where Re(λ) represents an in-plane retardation value (unit: nm) of the corresponding optically anisotropic layer measured at a wavelength of λ nm.

REFERENCES:
patent: 6812983 (2004-11-01), Arakawa
patent: 7697095 (2010-04-01), Toyama et al.
patent: 7738064 (2010-06-01), Otoshi et al.
patent: 2002/0060762 (2002-05-01), Arakawa
patent: 2008/0192191 (2008-08-01), Nakamura et al.
patent: 2006-208604 (2006-08-01), None
patent: 2007-298960 (2007-11-01), None

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