Liquid crystal composition and liquid crystal display element

1. A liquid crystal composition having negative dielectric anisotropy comprising:

as a first component, at least two compounds represented by at least two formulas selected from formulas (1-1) to (1-6) in the range of 20 to 75% by weight based on the total weight of the liquid crystal composition, and

as a second component, at least one compound selected from the group of the compounds represented by formulas (2-1) to (2-3) in the range of 25 to 75% by weight based on the total weight of the liquid crystal composition;

wherein R 1 is alkyl or alkenyl; R 2 is alkyl, alkenyl or alkoxy; Z 1 is a single bond or —COO—; A 1 is 1,4-cyclohexylene, 1,4-phenylene, or 1,4-phenylene in which any hydrogen may be replaced by fluorine; A 2 is 1,4-cyclohexylene or 1,4-phenylene; A 3 is 1,4-phenylene, or 1,4-phenylene in which any hydrogen may be replaced by fluorine; one of X 1 and X 2 is fluorine and the other is —CF 2 H.

2. A liquid crystal composition of claim 1 , wherein X 1 is —CF 2 H and X 2 is fluorine.

3. A liquid crystal composition of claim 1 or 2 , wherein one of at least two formulas selected from formulas (1-1) to (1-6) as the first component is formula (1-2), (1-4), (1-5) or (1-6).

4. A liquid crystal composition of claim 3 , wherein the first component is at least two compounds represented by at least two formulas selected from formulas (1-2), (1-4), (1-5) and (1-6).

5. A liquid crystal composition of claim 1 or 2 , wherein the first component is at least one compound represented by formula (1-4) and at least one compound represented by formula (1-6).

6. A liquid crystal composition of claim 1 or 2 , wherein the first component is at least one compound represented by formula (1-2) and at least one compound represented by formula (1-4).

7. A liquid crystal composition of claim 1 or 2 , wherein the first component is at least one compound represented by formula (1-2), at least one compound represented by formula (1-4) and at least one compound represented by formula (1-5).

8. A liquid crystal composition of claim 1 or 2 , wherein the first component is at least one compound represented by formula (1-2), at least one compound represented by formula (1-4) and at least one compound represented by formula (1-6).

9. A liquid crystal composition of claim 1 or 2 , wherein the first component is at least one compound represented by formula (1-2) and at least one compound represented by formula (1-5).

10. A liquid crystal composition of claim 1 or 2 , wherein the first component is at least one compound represented by formula (1-2) and at least one compound represented by formula (1-6).

11. A liquid crystal composition of claim 1 or 2 , wherein the first component is at least one compound represented by formula (1-3) and at least one compound represented by formula (1-5).

12. A liquid crystal composition of claim 1 or 2 , wherein the first component is at least one compound represented by formula (1-3) and at least one compound represented by formula (1-6).

13. A liquid crystal composition of claim 1 or 2 , wherein the first component is at least one compound represented by formula (1-4) and at least one compound represented by formula (1-5).

14. A liquid crystal composition of claim 1 or 2 , wherein the first component is at least one compound represented by formula (1-3) and at least one compound represented by formula (1-4).

15. A liquid crystal composition of claim 1 or 2 , wherein the first component is at least one compound represented by formula (1-3), at least one compound represented by formula (1-4) and at least one compound represented by formula (1-5).

16. A liquid crystal composition of claim 1 or 2 , wherein the first component is at least one compound represented by formula (1-3), at least one compound represented by formula (1-4) and at least one compound represented by formula (1-6).

17. A liquid crystal composition of claim 5 , wherein the second component is at least one compound selected from the group of the compounds represented by formulas (2-1-1), (2-1-2), (2-1-3), (2-1-4), (2-2-1), (2-2-2), (2-2-3), (2-2-4), (2-2-5), (2-2-6), (2-3-1), (2-3-2), (2-3-3) and (2-3-4);

wherein R 1 is alkyl or alkenyl; and R 2 is alkyl, alkenyl or alkoxy.

18. A liquid crystal composition of claim 6 , wherein the second component is at least one compound selected from the group of the compounds represented by formulas (2-1-1), (2-1-2), (2-1-3), (2-1-4), (2-2-1), (2-2-2), (2-2-3), (2-2-4), (2-2-5), (2-2-6), (2-3-1), (2-3-2), (2-3-3) and (2-3-4).

19. A liquid crystal composition of claim 7 , wherein the second component is at least one compound selected from the group of the compounds represented by formulas (2-1-1), (2-1-2), (2-1-3), (2-1-4), (2-2-1), (2-2-2), (2-2-3), (2-2-4), (2-2-5), (2-2-6), (2-3-1), (2-3-2), (2-3-3) and (2-3-4).

20. A liquid crystal composition of claim 8 , wherein the second component is at least one compound selected from the group of the compounds represented by formulas (2-1-1), (2-1-2), (2-1-3), (2-1-4), (2-2-1), (2-2-2), (2-2-3), (2-2-4), (2-2-5), (2-2-6), (2-3-1), (2-3-2), (2-3-3) and (2-3-4).

21. A liquid crystal composition of claim 11 , wherein the second component is at least one compound selected from the group of the compounds represented by formulas (2-1-1), (2-1-2), (2-1-3), (2-1-4), (2-2-1), (2-2-2), (2-2-3), (2-2-4), (2-2-5), (2-2-6), (2-3-1), (2-3-2), (2-3-3) and (2-3-4).

22. A liquid crystal composition of claim 12 , wherein the second component is at least one compound selected from the group of the compounds represented by formulas (2-1-1), (2-1-2), (2-1-3), (2-1-4), (2-2-1), (2-2-2), (2-2-3), (2-2-4), (2-2-5), (2-2-6), (2-3-1), (2-3-2), (2-3-3) and (2-3-4).

23. A liquid crystal composition of claim 13 , wherein the second component is at least one compound selected from the group of the compounds represented by formulas (2-1-1), (2-1-2), (2-1-3), (2-1-4), (2-2-1), (2-2-2), (2-2-3), (2-2-4), (2-2-5), (2-2-6), (2-3-1), (2-3-2), (2-3-3) and (2-3-4).

24. A liquid crystal composition of claim 14 , wherein the second component is at least one compound selected from the group of the compounds represented by formulas (2-1-1), (2-1-2), (2-1-3), (2-1-4), (2-2-1), (2-2-2), (2-2-3), (2-2-4), (2-2-5), (2-2-6), (2-3-1), (2-3-2), (2-3-3) and (2-3-4).

25. A liquid crystal composition of claim 17 , wherein the second component is at least one compound selected from the group of the compounds represented by formula (2-1-1), (2-1-2), (2-2-1), (2-2-4), (2-3-1) and (2-3-4).

26. A liquid crystal composition of claim 18 , wherein the second component is at least one compound selected from the group of the compounds represented by formula (2-1-1), (2-1-2), (2-2-1), (2-2-4), (2-3-1) and (2-3-4).

27. A liquid crystal composition of claim 19 , wherein the second component is at least one compound selected from the group of the compounds represented by formula (2-1-1), (2-1-2), (2-2-1), (2-2-4), (2-3-1) and (2-3-4).

28. A liquid crystal composition of claim 20 , wherein the second component is at least one compound selected from the group of the compounds represented by formula (2-1-1), (2-1-2), (2-2-1), (2-2-4), (2-3-1) and (2-3-4).

29. A liquid crystal composition of claim 21 , wherein the second component is at least one compound selected from the group of the compounds represented by formula (2-1-1), (2-1-2), (2-2-1), (2-2-4), (2-3-1) and (2-3-4).

30. A liquid crystal composition of claim 22 , wherein the second component is at least one compound selected from the group of the compounds represented by formula (2-1-1), (2-1-2), (2-2-1), (2-2-4), (2-3-1) and (2-3-4).

31. A liquid crystal composition of claim 23 , wherein the second component is at least one compound selected from the group of the compounds represented by formula (2-1-1), (2-1-2), (2-2-1), (2-2-4), (2-3-1) and (2-3-4).

32. A liquid crystal composition of claim 24 , wherein the second component is at least one compound selected from the group of the compounds represented by formula (2-1-1), (2-1-2), (2-2-1), (2-2-4), (2-3-1) and (2-3-4).

33. A liquid crystal composition of claim 1 , wherein the dielectric anisotropy ranges from −6.5 to −2.0.

34. A liquid crystal display element which comprises the liquid crystal composition of claim 1 .

35. A liquid crystal display element of claim 34 , wherein the element has VA mode or IPS mode and is driven by active matrix.

36. A method of using the liquid crystal composition of claim 1 for a liquid crystal display element which has VA mode or IPS mode and is driven by active matrix.