Mesomorphic compound, liquid crystal composition, liquid crystal device, display apparatus and display method

Abstract

A mesomorphic compound represented by the following formula (I): ##STR1## wherein R.sub.1 denotes a linear or branched alkyl group having 1-18 carbon atoms capable of including one or non-neighboring two or more methylene groups which can be replaced with at least one species of ##STR2## with the proviso that X denotes O or S and Y denotes halogen; R.sub.2 denotes a linear or branched alkyl group having 1-18 carbon atoms; A, B and D independently denote ##STR3## wherein Z.sub.1 and Z.sub.2 independently denote hydrogen, halogen, --CH.sub.3, --CN or --CF.sub.3 ; E denotes --CH.sub.3, --CH.sub.2 F or --CF.sub.3 ; and f and g independently denote 0 or 1. The mesomorphic compound is effective for providing a ferroelectric liquid crystal composition showing an improved response speed and also effective for suppressing occurrence of reverse domain.

Dependencies are inferred from the claim text.