Liquid crystal composition and liquid crystal display device

摘要

The present invention is to provide a liquid crystal composition which has particularly a high upper limit temperature of a nematic phase, a low lower limit temperature of the nematic phase and a small birefringence while satisfying general characteristics required to the liquid crystal composition for an AM-LCD. Liquid crystal compositions are disclosed which comprising a component I comprising at least one compound selected from the group of compounds represented by Formula (I-1) or (I-2), a component II comprising at least one compound selected from the group of compounds represented by Formulas (II-1) to (II-8) and a component III comprising at least one compound selected from the group of compounds represented by Formulas (III-1) to (III-5): wherein R<1> and R<2> each represent independently an alkyl group, an alkoxy group, an alkoxymethyl group having 1 to 10 carbon atoms or an alkenyl group having 2 to 10 carbon atoms; R<3> represents an alkyl group, an alkoxy group, an alkoxymethyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms or -COO-R<6>; R<6> represents an alkyl group having 1 to 10 carbon atoms; R<4> represents an alkyl group, an alkoxy group having 1 to 10 carbon atoms or an alkenyl group having 2 to 10 carbon atoms; R<5> represents an alkyl group, an alkoxy group, an alkoxymethyl group having 1 to 10 carbon atoms or an alkenyl group having 2 to 10 carbon atoms; Z<1> and Z<4> each represent independently a single bond or -CH2CH2-; Z<2> and Z<3> each represent independently a single bond, -CH2CH2- or -CH=CH-; X1 represents F, Cl, OCHF2 or OCF3; X2 represents F, OCHF2 or OCF3; Y<1> and Y<2> each represent independently H or F; and Q represents H or F.