| 摘要 |
PROBLEM TO BE SOLVED: To obtain a chiral nematic liquid crystal composition excellent in rapid responding property and low temperature miscibility, capable of being driven by an electric voltage in a wide temperature range and low in temperature dependence of pitch thereof by containing a specific optically active compound in a specific liquid crystal composition and adjusting at a specific helical pitch. SOLUTION: This liquid crystal composition contains (A) a liquid crystal compound such as a compound of formula I [R<1> is a 1-10C alkyl; Q<1> is H or F; (m) is 0, 1] or formula II [R<2> is R<1> , etc.; A<1> is trans-1, 4-cyclohexylene(x), etc.; Z<1> is CH2 CH2 or a single bond], (B) a compound of formula III (R<6> , R<7> are each R<2> ; B is A<1> , etc.; C is A<1> ; Z<5> is Z<1> , etc.), formula IV (R<8> is R<2> ; R<9> is R<1> , etc.; D is X, etc.; E is X, etc.; G is X, etc.; Z<6> is Z<1> , Z<7> is C≡C, etc.) or a formula V (R<10> is R<2> ; R<11> is R<9> ; Q<2> is Q<1> ), and (C) an optically active compound having >=0.15m (μm.wt.%)<-1> helical twisting force at 25 deg.C and adjusted to have <=4μm helical pitch thereof.
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