申请人:Seiko Instruments Inc.
公开号:US04725688A1
公开(公告)日:1988-02-16
The present invention is an optically active liquid crystal compound shown in the following general formula; ##STR1## [wherein, A and B respectively show one of --, --O--, ##STR2## (-- shows direct bond), one of R.sub.1 and R.sub.2 shows direct chain alkyl group and the other one shows either alkyl group having asymmetric carbon atom or alkoxy alkyl group having asymmetric carbon atom and ether bonding. Also, onto the asymmetric carbon atom, one of the groups --CH.sub.3, --CN, --Cl is added.] It is clear that there are many compounds in these liquid crystal compounds, that show Sm C* phase in a wide temperature range close to room temperature and that have high response speed.
本发明是一种在以下一般式中显示的光学活性液晶化合物;##STR1## [其中,A和B分别表示--,--O--,##STR2##(--表示直接键),R.sub.1和R.sub.2中的一个表示直链烷基基团,另一个表示具有不对称碳原子的烷基基团或具有不对称碳原子和醚键合的烷氧基烷基基团。此外,在不对称碳原子上添加了--CH.sub.3、--CN、--Cl中的一种基团。] 明显地,这些液晶化合物中有许多化合物,在接近室温的宽温度范围内显示Sm C*相,并具有高响应速度。