Optical liquid crystal element

Details Optical liquid crystal element Optical liquid crystal element

1993-07-12

1995-09-05

Crane, Sara W.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 63, G02F 113

Patent

active

054483867

ABSTRACT:
An electro-optic element, such as a liquid crystal, exhibits optical rotatory dispersion and includes a pair of phase difference films which have generally orthogonal stretching axes and are disposed between a pair of polarizing plates. The stretching axis directions of the phase difference films and the transmission axis directions of the polarizing plates are arranged relative to the molecular orientation of the surfaces of the liquid crystal cell to achieve an increase in the angle of visibility, an increase in contrast and improvements in color tones.

REFERENCES:
patent: 4852976 (1989-08-01), Suzuki
patent: 4877309 (1989-10-01), Takamatsu
patent: 4936654 (1990-06-01), Suzaki et al.

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