Flüssigkristallverbindungen, Flüssigkristalle enthaltende Zubereitungen, und aus diesen Verbindungen hergestellte Flüssigkristallanzeigen

摘要

The invention is to provide liquid crystalline compounds which have a low viscosity, high negative dielectric anisotropy, high resistivity, and high voltage holding ratio, and are stable against heat and ultraviolet light; to provide liquid crystal compositions comprising the liquid crystalline compound; and to provide liquid crystal display devices using the liquid crystal composition therein; the liquid crystalline compound is expressed by the general formula (1) wherein R<1> and Y<1> represent an alkyl group having 1 to 20 carbon atoms one or more non-adjacent methylene groups in the alkyl group may be replaced by oxygen atom, sulfur atom, or vinylene group; X<1>, X<2>, and X<3> independently represent single bond, 1,2-ethylene group, vinylene group, -COO-, provided that at least one of X<1>, X<2>, and X<3> represents -COO-, and one of the remaining two bonding groups necessarily represents vinylene group; and wherein the rings A<1> to A<4> and m and n have the meanings as defined in claim 1.