Liquid crystal composition and display device
A liquid crystal composition and a display device are provided. The liquid crystal composition includes a compound having a structure represented by general formula (I) and a compound having a structure represented by general formula (II), and L 1 , L 2 , L 3 and L 4 are independently selected from Z 1 is selected from a single bond or —C≡C—; R 1 , R 2 and R 3 are independently selected from alkyl, alkenyl, alkynyl, haloalkyl or OR 4 ; and R 4 is selected from alkyl, alkenyl, alkynyl or haloalkyl.
1. A liquid crystal composition, comprising: a compound having a structure represented by general formula (I) and a compound having a structure represented by general formula (II),
wherein
L 1 , L 2 , L 3 and L 4 are
Z 1 is —C≡C—;
R 1 is N-propyl;
R 2 is vinyl; and
R 3 is methyl.
2. The liquid crystal composition according to claim 1 , wherein
based on a total mass of the liquid crystal composition, the compound having the formula (I) has a mass percentage of about 10 wt % to 20 wt %; and the compound having the formula (II) has a mass percentage of about 5 wt % to 15 wt %.
3. The liquid crystal composition according to claim 1 , wherein the liquid crystal composition has a melting point (S—N) no more than −50° C. from a crystalline state to a nematic phase.
4. The liquid crystal composition according to claim 3 , wherein the liquid crystal composition has one or more of the following properties:
a clearing point Cp of the liquid crystal composition is 103±5° C.;
a dielectric anisotropy Δ ϵ of the liquid crystal composition is 6.1±0.5; and
an optical anisotropy Δn of the liquid crystal composition is 0.118±0.005.
5. The liquid crystal composition according to claim 1 , further comprising: compounds having a structure represented by general formulae (III) to (VIII) respectively:
wherein
L 5 , L 6 , L 7 , L 8 , L 9 and L 10 are independently selected from a group consisting of
Z 2 , Z 3 and Z 4 are independently selected from a group consisting of a single bond,
—C C═C—, —C≡C—, —O—, —COO—, —OCO—, —CH 2 O— or —OCH 2 —;
R 5 , R 6 , R 7 , R 8 , R 9 , R 10 , R 11 , R 12 , R 13 , and R 14 are independently selected from a group consisting of C1 to C8 alkyl, C2 to C8 alkenyl, C2 to C8 alkynyl, C1 to C8 haloalkyl, or OR 15 ; and
R 15 is selected from a group consisting of C1 to C8 alkyl, C2 to C8 alkenyl, C2 to C8 alkynyl, or C1 to C8 haloalkyl.
6. The liquid crystal composition according to claim 5 , wherein
L 5 , L 6 , L 7 , L 8 , L 9 and L 10 are
Z 2 , Z 3 and Z 4 are —COO—;
R 5 , R 9 , R 11 , R 12 , and R 13 are n-propyl;
R 6 is vinyl;
R 7 and R 14 are n-butenyl;
R 8 is methyl; and
R 10 is ethoxy.
7. The liquid crystal composition according to claim 5 , comprising compounds having structural formulae (1) to (8) respectively:
8. The liquid crystal composition according to claim 7 , wherein based on a total mass of the liquid crystal composition, the compound having the structural formula (1) has a mass percentage of about 15 wt %; and the compound having the structural formula (2) has a mass percentage of about 10 wt %.
9. A display device, comprising the liquid crystal composition according to claim 1 .