Liquid crystal display device having negative uniaxial anisotrop

Details Liquid crystal display device having negative uniaxial anisotrop Liquid crystal display device having negative uniaxial anisotrop

1995-06-07

1996-06-18

Sikes, William L.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 63, G02F 11335

Patent

active

055284000

ABSTRACT:
A liquid crystal display device is composed of a liquid crystal cell having TN liquid crystal, a pair of polarizing plates arranged on both sides of the cell comprising a polarizer and a pair of protective films provided both sides of the polarizer and an optical compensatory sheet between the cell and the polarizing plate. The optical compensatory sheet comprises at least two optically anisotropic films having optically negative uniaxial property, one film having an optic axis in the direction of the normal of the film and other film having an optic axis in a direction inclined at 5-50 degrees from the normal, and the sum of retardation value of the film having an optic axis in the direction of the normal and retardation values of two protective films existing between the polarizers is from 100 to 400 nm.

REFERENCES:
patent: 4592623 (1986-06-01), Yamamoto et al.
patent: 4813770 (1989-03-01), Clerc et al.
patent: 5189538 (1993-02-01), Arakawa
patent: 5375006 (1994-12-01), Haas
patent: 5426524 (1995-06-01), Wada et al.

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