Homeotropic liquid crystal display device

Details Homeotropic liquid crystal display device Homeotropic liquid crystal display device

1989-07-03

1991-08-13

Hille, Rolf

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 93, G02F 113

Patent

active

050391852

ABSTRACT:
A homeotropic liquid crystal display device compensated for the anisotropy of the homeotropically oriented nematic liquid crystal layer, by anisotropy compensating means comprising at least two anisotropic (e.g. uniaxial) films having their optic axes disposed to form a right angle in a plane parallel to the substrate to form an optically negative activity in the direction perpendicular to the substrate. This optically negative activity is so selected to compensate the positive optical anisotropy of the nematic liquid crystal when oriented homeotropically in the absence of electric field.

REFERENCES:
patent: 4385806 (1983-05-01), Fergason
patent: 4620772 (1986-11-01), Sugimoto et al.
patent: 4701028 (1987-10-01), Clerc et al.
patent: 4909606 (1990-03-01), Wada et al.
patent: 4936654 (1990-06-01), Suzaki et al.

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