Liquid crystal composition and liquid crystal display using the same
View Patent ↗Disclosed are a liquid crystal composition and a liquid crystal display using the same. The liquid crystal composition includes a polar compound and a low-viscosity compound. The liquid crystal display includes first and second substrates that face each other, and first and second electrodes disposed on the first and second substrates, respectively. A liquid crystal layer including the liquid crystal composition is disposed between the first and second substrates.
1. A liquid crystal composition, comprising:
a first compound according to chemical formula 1;
a second compound according to chemical formula 2; and
a sixth compound according to chemical formula 6,
wherein, R 1 , R 2 , R 3 , and R 7 each denote an alkyl group, an alkenyl group, or an alkoxy group.
2. The liquid crystal composition of claim 1 , wherein the second compound comprises at least one of a compound in which R 2 is an ethyl group, a compound in which R 2 is a propyl group, and a compound in which R 2 is a butyl group.
3. The liquid crystal composition of claim 2 , wherein the compound, in which R 2 is the ethyl group, is present at a weight ratio of more than 0 wt % but not more than 35 wt % with respect to the liquid crystal composition.
4. The liquid crystal composition of claim 1 , further comprising at least one of:
a third compound according to chemical formula 3;
a fourth compound according to chemical formula 4; and
a fifth compound according to chemical formula 5,
wherein, R 4 , R 5 , and R 6 each denote an alkyl group, an alkenyl group, or an alkoxy group.
5. The liquid crystal composition of claim 4 , further comprising at least one of:
a seventh compound according to chemical formula 7;
an eighth compound according to chemical formula 8; and
a ninth compound according to chemical formula 9,
wherein, R 8 , R 9 , R 10 , R 11 , R 12 , and R 13 each denote an alkyl group, an alkenyl group, or an alkoxy group.
6. The liquid crystal composition of claim 5 , wherein R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 , R 10 , R 11 , R 12 , and R 13 each have 7 carbons or less.
7. The liquid crystal composition of claim 5 , wherein the first compound is present at a weight ratio of more than 0 wt % but not more than 20 wt % with respect to the liquid crystal composition.
8. The liquid crystal composition of claim 7 , wherein the second compound is present at a weight ratio of 30 wt % to 40 wt % with respect to the liquid crystal composition.
9. The liquid crystal composition of claim 5 , wherein the first compound is present at a weight ratio of 13 wt % with respect to the liquid crystal composition, the second compound is present at a weight ratio of 43 wt % with respect to the liquid crystal composition, the third compound is present at a weight ratio of 8 wt % with respect to the liquid crystal composition, the sixth compound is present at a weight ratio of 15 wt % with respect to the liquid crystal composition, the seventh compound is present at a weight ratio of 14 wt % with respect to the liquid crystal composition, the eighth compound is present at a weight ratio of 5 wt % with respect to the liquid crystal composition, and the ninth compound is present at a weight ratio of 2 wt % with respect to the liquid crystal composition.
10. A liquid crystal display, comprising:
a first substrate;
a second substrate;
a first electrode disposed on the first substrate;
a second electrode disposed on the second substrate and facing the first electrode; and
a liquid crystal layer disposed between the first substrate and the second substrate,
wherein the liquid crystal layer comprises a liquid crystal composition comprising:
a first compound according to chemical formula 1;
a second compound according to chemical formula 2; and
a sixth compound according to chemical formula 6,
wherein, R 1 , R 2 , R 3 , and R 7 each denote an alkyl group, an alkenyl group, or an alkoxy group.
11. The liquid crystal display of claim 10 , wherein the second compound comprises at least one of a compound in which R 2 is an ethyl group, a compound in which R 2 is a propyl group, and a compound in which R 2 is a butyl group.
12. The liquid crystal display of claim 10 , wherein the liquid crystal compound further comprises at least one of:
a third compound according to chemical formula 3;
a fourth compound according to chemical formula 4;
a fifth compound according to chemical formula 5;
a seventh compound according to chemical formula 7;
an eighth compound according to chemical formula 8; and
a ninth compound according to chemical formula 9,
wherein R 4 , R 5 , R 6 , R 8 , R 9 , R 10 , R 11 , R 12 , and R 13 each denote an alkyl group, an alkenyl group, or an alkoxy group.
13. The liquid crystal display of claim 12 , wherein R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 , R 10 , R 11 , R 12 , and R 13 each have 7 carbons or less.
14. The liquid crystal display of claim 12 , wherein the first compound is present at a weight ratio of 13 wt % with respect to the liquid crystal composition, the second compound is present at a weight ratio of 43 wt % with respect to the liquid crystal composition, the third compound is present at a weight ratio of 8 wt % with respect to the liquid crystal composition, the sixth compound is present at a weight ratio of 15 wt % with respect to the liquid crystal composition, the seventh compound is present at a weight ratio of 14 wt % with respect to the liquid crystal composition, the eighth compound is present at a weight ratio of 5 wt % with respect to the liquid crystal composition, and the ninth compound is present at a weight ratio of 2 wt % with respect to the liquid crystal composition.
15. The liquid crystal display of claim 10 , wherein a data voltage is applied to the first electrode, a common voltage is applied to the second electrode, and a maximum voltage difference between the data voltage and the common voltage is in the range of 4 V to 4.5 V.
16. The liquid crystal display of claim 15 , wherein a distance between the first electrode and the second electrode is 3.4 μm to about 4 μm.
17. The liquid crystal display of claim 16 , wherein the liquid crystal composition has rotational viscosity in the range of 61 mPa·s to 65 mPa·s.
18. The liquid crystal display of claim 17 , wherein the liquid crystal composition has dielectric anisotropy of 7 to 9 and refractive-index anisotropy of 0.1 to 0.12.