Liquid crystal composition and application thereof

A liquid crystal composition, comprising, in percentages by weight, 5-40% of one or more compounds represented by general formula I, 2-30% of one or more compounds represented by general formula II, and 20-70% of one or more compounds represented by general formula III;

• preferably comprising 9-30% of one or more compounds represented by general formula I, 3-26% of one or more compounds represented by general formula II, and 36-67% of one or more compounds represented by general formula III,
• wherein R1 independently represents a C1-C12 linear alkyl group or a C2-C12 linear alkenyl group;
• and R2 independently represents a C1-C12 linear alkyl group, a C1-C12 linear alkoxy group or a C2-C12 linear alkenyl group;
• R4 and R5 each independently represent an unsubstituted C1-C12 linear alkyl group or a C1-C12 linear alkyl group having one or more non-adjacent CH2 substituted with O, S or CH═CH;
• X1 independently represents F, Cl, CN, a C1-C12 linear alkyl group, a C1-C12 linear alkoxy group or a C2-C12 linear alkenyl group;
• Z1 and Z2 each independently represent a single bond or an acetylenic bond, with at least one of Z1 and Z2 being an acetylenic bond;
• L1 independently represents H or F;
• A1, A2 and A3 each independently represent:
• A4 independently represents:
• A5 and A6 each independently represent a trans-1,4-cyclohexylene group or a 1,4-phenylene group;
• and m and n each independently represent 0 or 1.