Optical compensation film, polarizing plate, and...

Details Optical compensation film, polarizing plate, and... Optical compensation film, polarizing plate, and...

2011-04-19

2011-04-19

Kim, Richard H (Department: 2871)

Liquid crystal cells, elements and systems

Particular structure

Having significant detail of cell structure only

C349S117000, C349S118000

Reexamination Certificate

active

07929089

ABSTRACT:
Disclosed is an optical compensation film comprising first and second optically-anisotropic layers, wherein retardation in plane at a wavelength of 550 nm, Re(550), of the first optically-anisotropic layer is from 20 to 40 nm, the first optically-anisotropic layer does not have any direction in which its retardation at a wavelength of 550 nm is 0 nm, the direction in which the absolute value of retardation of the first optically-anisotropic layer is the smallest is neither in the normal line direction of the layer nor in the in-plane direction thereof, and Re(550) of the second optically-anisotropic layer is from 20 to 150 nm and retardation along thickness direction at a wavelength of 550 nm, Rth(550), thereof is from 40 to 110 nm.

REFERENCES:
patent: 7557883 (2009-07-01), Kawamoto et al.
patent: 2002-169023 (2002-06-01), None
patent: 2003-021718 (2003-01-01), None

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