Liquid crystal composition and display device thereof
Provided is a liquid crystal composition, which comprises a component prepared from one or more compounds selected from a general formula I; and a component prepared from one or more compounds selected from a general formula II. The liquid crystal composition has the characteristics of low viscosity, high reliability, appropriate optical anisotropy, and appropriate dielectric anisotropy, and is applicable to liquid crystal display devices.
1. A liquid crystal composition, comprising:
at least one compound selected from a group consisting of compounds of general formula I
and
at least one compound selected from a group consisting of compounds of general formula II
wherein:
R 1 and R 2 are same or different, and each independently represents C 1 -C 7 linear alkyl, C 1 -C 7 linear alkoxy;
R 3 and R 4 are same or different, and each independently represents C 1 -C 7 linear alkyl;
X represents CF 3 ; and
m represents 1 or 2;
wherein the liquid crystal composition further comprises at least one compound selected from a group consisting of compounds of general formula III
wherein,
R 5 and R 6 are same or different, and each independently represents C 1 -C 10 linear alkyl, and
wherein the liquid crystal composition further comprises at least one compound of general formulas IV and V
wherein,
R 7 , R 8 , R 9 and R 10 are same or different, and each independently represents C 1 -C 7 linear alkyl, C 1 -C 7 linear alkoxy;
Z 1 represents a single bond, —CH 2 O— or —COO—;
n represents 1 or 2.
2. The liquid crystal composition according to claim 1 , wherein the compound of general formula III is selected from a group consisting of the following compounds:
3. The liquid crystal composition according to claim 1 , wherein the compound of general formula IV is selected from a group consisting of the following compounds:
wherein the compound of general formula V is selected from a group consisting of the following compounds:
4. The liquid crystal composition according to claim 1 , wherein the liquid crystal composition further comprises at least one compound of general formula VI
wherein
R 11 and R 12 are same or different, and each independently represents C 1 -C 7 linear alkyl, C 1 -C 7 linear alkoxy, C 2 -C 5 linear alkenyl;
rings
are same or different, and each independently represents
q represents 1 or 2;
when q represents 2, two rings
are same or different, and each independently represents
5. The liquid crystal composition according to claim 4 , wherein the compound of general formula VI is selected from a group consisting of the following compounds:
6. The liquid crystal composition according to claim 1 , wherein the liquid crystal composition further comprises at least one compound of general formula VII
wherein,
R 13 and R 14 are same or different, and each independently represents C 1 -C 7 linear alkyl, C 1 -C 7 linear alkoxy;
rings
are same or different, and each independently represents
Z 2 represents a single bond, —CH 2 O— or —COO—;
p represents 0 or 1;
when Z 2 represents a single bond, p represents 1.
7. The liquid crystal composition according to claim 6 , wherein the compound of general formula VII is selected from a group consisting of the following compounds:
8. A liquid crystal display device comprising the liquid crystal composition of claim 1 .
9. The liquid crystal composition according to claim 1 , wherein the compound of general formula I is selected from a group consisting of the following compounds:
the compound of general formula II is selected from a group consisting of the following compounds: