| 摘要 |
A chiral nematic liquid crystal composition is provided, which has a broad d/P margin, particularly for corresponding to a large size of LCD panel, while satisfying various characteristics sought for STN display mode, and which contains as a first component, at least one member of compounds expressed by the formulas (I-a) to (I-d), as a second component, at least one member of compounds expressed by the formulas (II) to (V), and as a third component, a chiral component expressed by the formula (X), <CHEM> R<5>-(B)-Z<2>-(C)-R<6> R<7>-(D)-Z<3>-(E)-Z<4>-(G)-R<8> <CHEM> In these formulas, R<1> to R<5> represent an alkyl group of 1 to 10 carbon atoms, etc.; Z<0> to Z<4> represent -CH2CH2-, etc.; B,C,E and G represent 1,4-cyclohexylene or 1,4-phenylene; D represents 1,4-cyclohexylene or 1,3-pyrimidine-2,5-diyl; Q<1> and Q<2> represent H or F; and q and m each independently represent 0 or 1; R<1> to R<12> represent an alkyl group of 1 to 10 carbon atoms or an alkenyl group of 2 to 10 carbon atoms. This composition may be used in STN mode, TN mode or AN mode liquid crystal display elements. This invention also describes the liquid crystal display elements containing such composition. |
