| 摘要 |
<p>Disclosed are liquid crystal compositions each comprising a first component (formula (I)), a second component (formula (II)), a third component (formulae (III) to (V)) and a fourth component (formulae (VI) and (VII)): <CHEM> R1, R2, R3, R4, R5, R6, R7 and R9 each are a C1-8 alkyl; n, m, p, q and r each are 0 or 1; R8 and R10 each are a C1-8 alkyl or alkoxy, or a C2-8 alkoxymethyl; A1 is a 1,5-cyclohexylene, 1,4-phenylene or 1,3-dioxane-2,5-diyl; A2 and A5 each are a 1,4-cyclohexylene, 1,4-phenylene or pyrimidine-2,5-diyl; A3, A4, A6 and A7 each are a 1,4-cyclohexylene or 1,4-phenylene; Z1, Z3 and Z6 each are -COO- or a single bond; Z2 and Z4 each are -CH2-CH2-, -CH=CH- or a single bond; Q and Z5 each are -CH2CH2- or a single bond; L, X and T each are F or H; S is F, Cl or CF3. Also provided are electro-optical display devices containing any of these compositions, which have rapid response and can be driven even at a low voltage. The temperature-dependence of the driving voltage for the devices is reduced.</p> |
