FERROELECTRIC LIQUID CRYSTAL ELEMENT

摘要

PURPOSE:To obtain the titled element having excellent low-temperature operat ing characteristics and high-speed response, comprising a novel liquid crystal composition containing a specific liquid crystal compound in a ferroelectric liquid crystal layer. CONSTITUTION:The aimed element containing one or more liquid crystal compounds shown by formula I {A1 and A2 are bifunctional six-membered ring which may contain substituent group; X is -(CH2)l -O- or -O-(CH2)m; land m are 1 or 2; at least one of R1 and R2 contains asymmetric carbon and when R1 and R2 are the same, R1 and R2 are group shown by formula II-IV [Y1-Y3 are single bond or -O-; n1 and n2 are 0-8; R3-R5 are replaceable 1-18C chain alkyl; Z1 is -(CH)n2-(n2 is 0 or 1) or carbonyl; Z2 is -CH3 or CN; Z3 is halogen] and further when R1 is different from R2, one of R1 and R2 is group shown by formula II-IV and the other is R3 or acyloxy} in a ferroelectric liquid crystal layer. A compound shown by formula V may be cited as the liquid crystal compound.