BROAD-BAND-CHOLESTERIC LIQUID-CRYSTAL FILM, PROCESS FOR PRODUCING THE SAME, CIRCULARLY POLARIZING PLATE, LINEARLY POLARIZING ELEMENT, ILLUMINATOR, AND LIQUID-CRYSTAL DISPLAY

摘要

A broad-band-cholesteric liquid-crystal film which is obtained by applying a liquid-crystal mixture comprising a polymerizable chiral reagent (b) and an optically isomerized material (c) to a substrate and polymerizing the coating with ultraviolet, and which has a reflection band width of 200 nm or more. The broad-band-cholesteric liquid-crystal film has a broad reflection band, is thin, and can be produced through a small number of steps.