Ferroelectric liq. crystalline mixts. - contg. complex ligand for ions are used in electro=optical components

摘要

Ferroelectric liq crystalline (FLC) mixts (I) contg at least one complex ligand (II) for ions are used in (I)-light valves (ie, devices which with electrical switching change their optical transmission properties so that intensity of incident, and opt re-reflected, light is modulated eg, watch and pocket calculator displays, liq crystal in office automation or TV, also light shutters in copying machines, printers, welding goggles, goggles for 3-dimensional viewing, and spacial light modulators.) (II) is electrically neutral cpd.. (II) complexes cations and has at least 2 N and/or 0 and/or S and/or P donor centres. (II) is medio- or macro-cyclic cpd.. (I) contains 0.01-10 mol% cryptand, coronand, or podand as (II). (I) contains several different (II) for different ions. Light valve is in mutliplex process-regulationed switching device. Light valve has SSFLC cell with layer thickness 1-10 microns and (I) has Sc phase in working temp range. Liq crystal switching and display devices contg (I), support plates, electrodes, at least one orientation layer, and opt additional auxiliary layers. ADVANTAGE - Optical hysteresis is much reduced, formation off ghost images is avoided.