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...

2009-03-20

2011-11-01

Stahl, Mike (Department: 2874)

Liquid crystal cells, elements and systems

Particular structure

Having significant detail of cell structure only

C349S119000

Reexamination Certificate

active

08049849

ABSTRACT:
The present invention provides an optical film including at least two optically anisotropic layers, wherein one optically anisotropic layer satisfies Expression (1) described below, the other optically anisotropic layer satisfies Expression (2) described below, and a slow axis of the one optically anisotropic layer is parallel to a slow axis of the other 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: 7929087 (2011-04-01), Nagai
patent: 2003/0086027 (2003-05-01), Uchiyama et al.
patent: 2008/0151373 (2008-06-01), Sekiguchi et al.
patent: 2009/0174846 (2009-07-01), Ito
patent: 2006-208604 (2006-08-01), None
patent: 2007-51210 (2007-03-01), None
patent: 2007-298960 (2007-11-01), None

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