Multistable chiral nematic displays

Details Multistable chiral nematic displays Multistable chiral nematic displays

1993-05-04

1995-09-26

Gross, Anita Pellman

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359102, G02F 1137, G02F 113

Patent

active

054538637

ABSTRACT:
A light modulating reflective cell comprising a polymer-free chiral nematic liquid crystalline light modulating material is disclosed. The cell includes nematic liquid crystal having positive dielectric anisotropy and chiral material in an amount effective to form focal conic and twisted planar textures. The chiral material has a pitch length effective to reflect light in the visible spectrum, wherein the focal conic and twisted planar textures are stable in the absence of a field and the liquid crystal material is capable of changing textures upon the application of a field.

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