LIQUID CRYSTAL LIGHT VALVE CONTAINING A MIXTURE OF NEMATIC AND CHOLESTERIC MATERIALS IN WHICH THE LIGHT SCATTERING EFFECT IS REDUCED WHEN AN ELECTRIC FIELD IS APPLIED

摘要

A liquid crystal light valve comprises a mixture of at least one nematic liquid crystal compound of the type that aligns in an electric field, with cholesterol, a cholestrol derivative of a cholesteric liquid crystal and means for applying an electric field to said mixture.