Liquid crystal composition and display device thereof
The present invention discloses a liquid crystal composition comprising at least one compound of general formula I and a display device thereof. The present invention also discloses a liquid crystal display device comprising the liquid crystal composition of the present invention. The liquid crystal composition provided by the present invention has characteristics, such as a high absolute value of negative dielectric anisotropy, a high optical anisotropy, a superior low-temperature stability, a fast response speed and so forth. The liquid crystal display device comprising the liquid crystal composition of the present invention can satisfy the demand for low driving voltage and fast response.
1. A liquid crystal composition, wherein the liquid crystal composition comprises:
at least one compound
selected from a group consisting of the following compounds:
in which,
R 1 represents C 1-12 alkyl or alkoxy, or C 2-12 alkenyl or alkenoxy, wherein one or more nonadjacent —CH 2 — in the alkyl or alkoxy and the alkenyl or alkenoxy can each be independently replaced by —O— in a manner that oxygen atoms are not directly connected;
R 3 represents C 1-7 alkyl or C 2-7 alkenyl;
n represents an integer of 2-6.
2. A liquid crystal composition, wherein the liquid crystal composition comprises:
(a) at least one compound
selected from a group consisting of the following compounds:
(b) at least one compound selected from a group consisting of the following compounds:
in which,
R 1 represent C 1-12 alkyl or alkoxy, or C 2-12 alkenyl or alkenoxy, wherein one or more nonadjacent —CH 2 — in the alkyl or alkoxy and the alkenyl or alkenoxy can each be independently replaced by —O— in a manner that oxygen atoms are not directly connected;
R 3 represents C 1-7 alkyl or C 2-7 alkenyl; and
n represents an integer of 2-6.
3. The liquid crystal composition according to claim 2 , wherein the at least one compound selected from general formulas I-a and I-b and the at least one compound selected from formula I-c provide from 1 wt % to 35 wt % of the total weight of the liquid crystal composition.
4. The liquid crystal composition according to claim 2 , wherein at least one compound selected from general formulas I-a and I-b and the at least one compound selected from formula I-c are selected from a group consisting of the following compounds:
in which,
R 1 represent C 1-12 alkyl or alkoxy, or C 2-12 alkenyl or alkenoxy, wherein one or more nonadjacent —CH 2 — in the alkyl or alkoxy and the alkenyl or alkenoxy can each be independently replaced by —O— in a manner that oxygen atoms are not directly connected;
R 3 represents C 1-7 alkyl or C 2-7 alkenyl; and
n represents an integer of 2-6.
5. The liquid crystal composition according to claim 3 , wherein the at least one compound selected from general formulas I-a and I-b and the at least one compound selected from formula I-c provides from 5 wt % to 30 wt % of the total weight of the liquid crystal composition.
6. The liquid crystal composition according to claim 5 , wherein the liquid crystal composition further comprises at least one compound of general formula II
in which,
R 4 and R 5 each independently represents C 1-12 alkyl or alkoxy, or C 2-12 alkenyl or alkenoxy, wherein one or more nonadjacent —CH 2 — in the alkyl or alkoxy and the alkenyl or alkenoxy can each be independently replaced by —O— in a manner that oxygen atoms are not directly connected; ring
one or more —CH 2 — in the
can be replaced by —O—, one or more H on the
can be substituted by F;
Z 1 represents single bond, —CH 2 O—, —CF 2 O— or —COO—;
m represents 0 or 1.
7. The liquid crystal composition according to claim 1 , wherein the liquid crystal composition further comprises at least one compound of general formula II
in which,
R 4 and R 5 each independently represents C 1-12 alkyl or alkoxy, or C 2-12 alkenyl or alkenoxy, wherein one or more nonadjacent —CH 2 — in the alkyl or alkoxy and the alkenyl or alkenoxy can each be independently replaced by —O— in a manner that oxygen atoms are not directly connected;
ring
one or more —CH 2 — in the
can be replaced by —O—, one or more H on the
can be substituted by F;
Z 1 represents single bond, —CH 2 O—, —CF 2 O— or —COO—;
m represents 0 or 1.
8. The liquid crystal composition according to claim 6 , wherein the liquid crystal composition further comprises at least one compound of general formula III
in which,
R 6 and R 7 each independently represents C 1-12 alkyl or alkoxy, or C 2-12 alkenyl or alkenoxy, wherein one or more nonadjacent —CH 2 — in the alkyl or alkoxy and the alkenyl or alkenoxy can each be independently replaced by —O— in a manner that oxygen atoms are not directly connected;
ring
and ring
each independently represents
Z 2 represents single bond, —CH 2 O—, —CF 2 O— or —COO—;
p represents 0 or 1.
9. The liquid crystal composition according to claim 7 , wherein the liquid crystal composition further comprises at least one compound of general formula III
in which,
R 6 and R 7 each independently represents C 1-12 alkyl or alkoxy, or C 2-12 alkenyl or alkenoxy, wherein one or more nonadjacent —CH 2 — in the alkyl or alkoxy and the alkenyl or alkenoxy can each be independently replaced by —O— in a manner that oxygen atoms are not directly connected;
ring
and ring
each independently represents
Z 2 represents single bond, —CH 2 O—, —CF 2 O— or —COO—;
p represents 0 or 1.
10. A liquid crystal display device comprising the liquid crystal composition of claim 1 .
11. A liquid crystal display device comprising the liquid crystal composition of claim 2 .