Liquid crystal composition and display device thereof
The present invention provides a liquid crystal composition comprising: at least one compound of general Formula I; at least one compound of general Formula II; at least one compound of general Formula M and at least one compound of general Formula N. The present invention also provides a liquid crystal display device comprising the liquid crystal composition. The liquid crystal composition provided in the present invention has a higher optical anisotropy, a higher clearing point, a higher dielectric anisotropy, a high transmittance and a larger average elastic constant. When the liquid crystal composition is used in the IPS liquid crystal display device, the transmittance of the display device can be effectively improved, so that the display device has a good display performance while also having good energy-saving and environment-friendly characteristics.
1. A liquid crystal composition comprising:
(a) at least one compound selected from the group consisting of:
in which,
L 5 represents —H or —F;
R x and R y each independently represents —CH 2 — or —O—; and
n1 represents 0 or 1;
(b) at least one compound of general Formula II
(c) at least one compound of general Formula N
and
(d) at least one compound of general Formula M
in which,
R 1 represents C 1-12 linear or branched alkyl, one or more nonadjacent —CH 2 — in the C 1-12 linear or branched alkyl can each be independently replaced by —C═C—, —C≡C—, —O—, —CO—, —CO—O— or —O—CO—, and one or more —H in the C 1-12 linear or branched alkyl can each be independently substituted by —F or —Cl;
R A1 represents C 1-12 linear or branched alkyl,
one or more nonadjacent —CH 2 — in the C 1-12 linear or branched alkyl can each be independently replaced by —CH═CH—, —C≡C—, —O—, —CO—, —CO—O— or —O—CO—, and one or more —H in these groups can each be independently substituted by —F or —Cl;
R N1 and R N2 each independently represents C 1-12 linear or branched alkyl or alkoxy, or C 2-12 linear or branched alkenyl or alkenoxy, one or more nonadjacent —CH 2 — in the C 1-12 linear or branched alkyl or alkoxy, or the C 2-12 linear or branched alkenyl or alkenoxy can each be independently replaced by —C≡C—, —O—, —CO—, —CO—O— or —O—CO—;
R M1 and R M2 each independently represents —H, —F,
C 1-12 linear or branched halogenated or unhalogenated alkyl or alkoxy, or C 2-12 linear or branched halogenated or unhalogenated alkenyl or alkenoxy, one or more nonadjacent —CH 2 — in the C 1-12 linear or branched halogenated or unhalogenated alkyl or alkoxy, or the C 2-12 linear or branched halogenated or unhalogenated alkenyl or alkenoxy can each be independently replaced by —C≡C—, —O—, —CO—, —CO—O— or —O—CO—;
ring
and ring
each independently represents
wherein one or more —CH 2 — in
can be replaced by —O—, and one or more single bonds in the ring can be replaced by double bond; one or more —H on
can be substituted by —CN, —F or —Cl, and one or more —CH═ in the ring can be replaced by —N═;
ring
and ring
each independently represents
wherein one or more —CH 2 — in
can be replaced by —O—, and one or more single bonds in the ring can be replaced by double bond; one or more —H on
can be substituted by —CN, —F or —Cl, and one or more —CH═ in the ring can be replaced by —N═;
ring
ring
and ring
each independently represents
wherein, at most one —CH 2 — in
can be replaced by —O—, at most one —H on
can be substituted by halogen;
Z A11 represents single bond, —CH 2 CH 2 —, —CF 2 CF 2 —, —CF 2 O—, —OCF 2 —, —CO—O—, —O—CO—, —O—CO—O—, —CH═CH—, —C≡C—, —CF═CF—, —CH 2 O— or —OCH 2 —;
Z M1 and Z M2 each independently represents single bond, —CO—O—, —O—CO—, —CH 2 O—, —OCH 2 —, —CH═CH—, —C≡C—, —CH 2 CH 2 — or —(CH 2 ) 4 —;
Z N1 and Z N2 each independently represents single bond, —CO—O—, —O—CO—, —CH 2 O—, —OCH 2 —, —CH═CH—, —C≡C—, —CH 2 CH 2 —, —(CH 2 ) 4 —, —CF 2 O—, —OCF 2 — or —CF 2 CF 2 —;
L 1 , L 2 , and L 4 each independently represents —H, —CH 3 or halogen;
X represents halogen, C 1-5 halogenated alkyl or halogenated alkoxy, or C 2-5 halogenated alkenyl or halogenated alkenoxy;
L A11 , L A12 and L A13 each independently represents —H, —F, —CH 3 or —Cl;
X A1 represents halogen, C 1-5 halogenated alkyl or halogenated alkoxy, or C 2-5 halogenated alkenyl or halogenated alkenoxy;
n A1 represents 0, 1, 2 or 3, and when n A1 =2 or 3, ring
can be same or different, Z A11 can be same or different;
n M1 represents 0, 1, 2 or 3, and when n M1 =2 or 3, ring
can be same or different, Z M2 can be same or different; and
n N1 represents 0, 1, 2 or 3, n N2 represents 0 or 1, and 0≤n N1 +n N2 ≤3; when n N1 =2 or 3, ring
can be same or different, and Z N1 can be same or different.
2. The liquid crystal composition according to claim 1 , wherein the at least one compound of Formulas I-3, I-7, and I-8 is 0.1%-60% by weight of the total weight of the liquid crystal composition.
3. The liquid crystal composition according to claim 1 , wherein R A1 represents C 1-8 linear or branched alkyl or alkoxy, or C 2-8 linear or branched alkenyl or alkenoxy.
4. The liquid crystal composition according to claim 1 , wherein ring
and ring
each independently represents
5. The liquid crystal composition according to claim 1 , wherein the compound of general Formula II is 1%-75% by weight of the total weight of the liquid crystal composition.
6. The liquid crystal composition according to claim 1 , wherein R N1 and R N2 each independently represents C 1-8 linear or branched alkyl or alkoxy, or C 2-8 linear or branched alkenyl or alkenoxy; ring
and ring
each independently represents
7. The liquid crystal composition according to claim 6 , wherein the compound of general Formula N is selected form a group consisting of the following compounds:
wherein R N1 and R N2 each independently represents C 1-12 linear or branched alkyl or alkoxy, or C 2-12 linear or branched alkenyl or alkenoxy, one or more nonadjacent —CH 2 — in the C 1-2 linear or branched alkyl or alkoxy, or the C 2-12 linear or branched alkenyl or alkenoxy can each be independently replaced by —C≡C—, —O—, —CO—, —CO—O— or —O—CO—.
8. The liquid crystal composition according to claim 1 , wherein the compound of general Formula N is 0.1%-50% by weight of the total weight of the liquid crystal composition.
9. The liquid crystal composition according to claim 1 , wherein the compound of general Formula M is selected form a group consisting of the following compounds:
wherein R M1 and R M2 each independently represents —H, —F,
C 1-12 linear or branched halogenated or unhalogenated alkyl or alkoxy, or C 2-12 linear or branched halogenated or unhalogenated alkenyl or alkenoxy, one or more nonadjacent —CH 2 — in the C 1-12 linear or branched halogenated or unhalogenated alkyl or alkoxy, or the C 2-12 linear or branched halogenated or unhalogenated alkenyl or alkenoxy can each be independently replaced by —C≡C—, —O—, —CO—, —CO—O— or —O—CO—.
10. The liquid crystal composition according to claim 9 , wherein the compound of general Formula M is 1%-80% by weight of the total weight of the liquid crystal composition.
11. A liquid crystal display device comprising the liquid crystal composition according to claim 1 .