FERROELECTRIC CHIRAL SMECTIC LIQUID CRYSTAL COMPOSITION AND LIGHT SWITCHING ELEMENT

摘要

A ferroelectric liquid crystal material having a long helical pitch and still having a large spontaneous electric polarization and superior response property can be provided by mixing a chiral smectic compound or compounds having a twist sense of helix right-handed with other chiral smectic compound or compounds having a twist sense of helix left-handed and also a light switching element is provided in which the above-mentioned ferroelectric chiral smectic liquid crystal composition is used.