Nematic liquid crystal composition and liquid crystal display device using the same
A liquid crystal composition of the present invention has a liquid phase over a wide temperature range, low viscosity, good solubility at a low temperature, high resistivity and voltage holding ratio, and stability to heat and light, and can thus provide, in high yield, a liquid crystal display device having good display quality and causing little display defects such as image sticking, dropping marks, and the like. A liquid crystal display device using the liquid crystal composition of the present invention is useful, particularly useful for a liquid crystal display device for active matrix driving, because both fast response and suppression of display defects are achieved, and the liquid crystal display device can be applied to a liquid crystal display device for a VA mode, a PSVA mode, or a TN mode.
1. A liquid crystal composition having positive dielectric anisotropy, the composition comprising a component (A) which is a dielectrically positive component and a dielectrically neutral component (B) having a dielectric anisotropy of more than −2 and less than +2, the component (A) containing a dielectrically positive compound represented by (Formula-1) and at least one dielectrically positive compound selected from the group consisting of compounds represented by (Formula-5.1), (Formula-13.3), (Formula-17.2), and (Formula-17.4),
(in the formula, a ring
represents a 1,4-transcyclohexylene group) and the component (B) containing a dielectrically neutral compound represented by (Formula-2)
(in the formula, a ring
represents a 1,4-transcyclohexylene group).
2. The liquid crystal composition according to claim 1 , wherein the dielectrically neutral component (B) further contains at least one dielectrically neutral compound selected from the group consisting of compounds represented by (Formula-7.7), (Formula-15.1), (Formula-16.1), (Formula-16.2), and (Formula-16.3),
(in the formula, a ring
represents a 1,4-transcyclohexylene group).
3. The liquid crystal composition according to claim 1 , wherein the dielectrically neutral component (B) further contains at least one compound represented by (Formula-3.1) or (Formula-3.2),
(in the formula, a ring
represents a 1,4-transcyclohexylene group).
4. The liquid crystal composition according to claim 1 , wherein the dielectrically neutral component (B) further contains at least one compound selected from the group consisting of compounds represented by (Formula-4.1) to (Formula-4.8),
(in the formulae, R1 and R2 each independently represent a linear alkyl group or linear alkenyl group having 1 to 10 carbon atoms, (in the formulae, a ring
represents a 1,4-transcyclohexylene group).
5. The liquid crystal composition according to claim 1 , wherein the dielectrically positive component (A) further contains at least one compound selected from the group consisting of compounds represented by (Formula-5.3),
(in the formulae, a ring
represents a 1,4-transcyclohexylene group).
6. The liquid crystal composition according to claim 1 , wherein the dielectrically positive component (A) further contains at least one compound selected from the group consisting of compounds represented by (Formula-6.1) to (Formula-6.7),
(in the formulae, a ring
represents a 1,4-transcyclohexylene group).
7. The liquid crystal composition according to claim 1 , wherein the dielectrically neutral component (B) further contains at least one compound selected from the group consisting of compounds represented by (Formula-7.1) to (Formula-7.6), (Formula-7.8), and (Formula-7.9).
8. The liquid crystal composition according to claim 1 , wherein the dielectrically neutral component (B) further contains a compound represented by (Formula-8),
(in the formula, a ring
represents a 1,4-transcyclohexylene group).
9. The liquid crystal composition according to claim 1 , wherein the dielectrically positive component (A) further contains at least one compound represented by (Formula-9.1) to (Formula-9.3),
(in the formulae, a ring
represents a 1,4-transcyclohexylene group).
10. The liquid crystal composition according to claim 1 , wherein the dielectrically positive component (A) further contains at least one compound selected from the group consisting of compounds represented by (Formula-10.1) to (Formula-10.4).
11. The liquid crystal composition according to claim 1 , wherein the dielectrically neutral component (B) further contains at least one compound selected from the group consisting of compounds represented by (Formula-11.1) to (Formula-11.3),
(in the formulae, a ring
represents a 1,4-transcyclohexylene group).
12. The liquid crystal composition according to claim 1 , wherein the dielectrically positive component (A) further contains at least one compound selected from the group consisting of compounds represented by (Formula-12.1) to (Formula-12.3) and (Formula-12.5).
13. The liquid crystal composition according to claim 1 , wherein the dielectrically positive component (A) further contains at least one compound selected from the group consisting of compounds represented by (Formula-13.1) or (Formula-13.2).
14. The liquid crystal composition according to claim 1 , wherein the dielectrically neutral component (B) further contains at least one compound represented by (Formula-14.1) to (Formula-14.3),
(in the formulae, R1 and R2 each independently represent a linear alkyl group or linear alkenyl group having 1 to 10 carbon atoms).
15. The liquid crystal composition according to claim 1 , wherein the dielectrically neutral component (B) further contains at least one compound represented by (Formula-15.2),
(in the formula, a ring
represents a 1,4-transcyclohexylene group).
16. The liquid crystal composition according to claim 1 wherein the dielectrically positive component (A) further contains at least one compound represented by (Formula-17.1) or (Formula-17.3),
(in the formulae, a ring
represents a 1,4-transcyclohexylene group).
17. The liquid crystal composition according to claim 1 , wherein the dielectrically positive component (A) further contains at least one compound selected from the group consisting of compounds represented by (Formula-18.2) to (Formula-18.4),
(in the formulae, a ring
represents a 1,4-transcyclohexylene group).
18. The liquid crystal composition according to claim 1 , wherein the dielectrically positive component (A) further contains at least one compound selected from the group consisting of compounds represented by (Formula-19.1), (Formula-19.3), and (Formula-19.4),
(in the formulae, a ring
represents a 1,4-transcyclohexylene group).
19. A liquid crystal display device for active matrix driving comprising the liquid crystal composition according to claim 1 .
20. A liquid crystal display device for an IPS mode, a FFS mode, or a VA-IPS mode, comprising the liquid crystal composition according to claim 1 .
21. The liquid crystal composition according to claim 1 , wherein the component (A) containing the dielectrically positive compound represented by (Formula-1) and at least one dielectrically positive compound selected from the group consisting of compounds represented by (Formula-5.1) and (Formula-13.3).