Negative liquid crystal composition, and liquid crystal display element or liquid crystal display
The present invention belongs to the technical field of liquid crystal materials, and in particular relates to a negative liquid crystal composition and a liquid crystal display element or liquid crystal display containing the liquid crystal composition. The present invention discloses a negative dielectric nematic liquid crystal composition, comprising a compound represented by Formula I, one or more compounds represented by Formula II, and one or more compounds represented by Formula III. The liquid crystal composition has a relatively low rotational viscosity (γ 1 ), a high clearing point (Cp), a good solubility and a high stability to heat and light (VHR) on the basis of maintaining an appropriate optical anisotropy (Δn), and can be used for developing a liquid crystal display element or liquid crystal display with a low cell thickness, a wide temperature for display, and a fast response.
1. A negative dielectric nematic liquid crystal composition, comprising a compound represented by Formula I, one or more compounds represented by Formula II-2, II-9 and II-15, one compound represented by Formula III-2, one compound represented by Formula IV, one or more compounds represented by Formula V, one compound represented by Formula VI-2, VI-3 or VI-13, and one or more compounds represented by Formula VII:
wherein
R 4 represents an alkyl with a carbon atom number of 3-5; OR 5 represents an alkoxy with a carbon atom number of 2;
represents
R 6 represents an alkyl with a carbon atom number of 2-4; OR 7 represents an alkoxy with a carbon atom number of 2-4;
represents
R 10 and R 11 each independently represent an alkoxy with a carbon atom number of 2-5;
Z represents —S—,
a mass content of the compound represented by formula I is 7-10%, a mass content of one or more compounds represented by formula II-2, II-9 and II-15 is 10-20%, a mass content of the compound represented by Formula III-2 is 5-15%, a mass content of the compound represented by Formula IV is 5-10%, a mass content of one or more compounds represented by Formula V is 5-11%, a mass content of the compound represented by Formula VI-2, VI-3 or VI-13 is 5%, and a mass content of one or more compounds represented by Formula VII is 10-15%.
2. The liquid crystal composition according to claim 1 , wherein the liquid crystal composition further comprises one or more compounds represented by Formula VIII:
R 12 and R 13 each independently represent an alkyl with a carbon atom number of 1-10, a fluoro-substituted alkyl with a carbon atom number of 1-10, an alkoxy with a carbon atom number of 1-10, a fluoro-substituted alkoxy with a carbon atom number of 1-10, an alkenyl with a carbon atom number of 2-10, a fluoro-substituted alkenyl with a carbon atom number of 2-10, an alkenoxy with a carbon atom number of 3-8, or a fluoro-substituted alkenoxy with a carbon atom number of 3-8; and
each independently represent 1,4-phenylene, 1,4-cyclohexylene or 1,4-cyclohexenylene.
3. The liquid crystal composition according to claim 1 , wherein the liquid crystal composition further comprises one or more compounds represented by Formula IX:
wherein
R 14 and R 15 each independently represent an alkyl with a carbon atom number of 1-10, a fluoro-substituted alkyl with a carbon atom number of 1-10, an alkoxy with a carbon atom number of 1-10, a fluoro-substituted alkoxy with a carbon atom number of 1-10, an alkenyl with a carbon atom number of 2-10, a fluoro-substituted alkenyl with a carbon atom number of 2-10, an alkenoxy with a carbon atom number of 3-8, or a fluoro-substituted alkenoxy with a carbon atom number of 3-8; and
m represents 1 or 2.
4. A liquid crystal display element or liquid crystal display comprising the liquid crystal composition according to claim 1 , wherein the liquid crystal display element or liquid crystal display is an active matrix addressing display element or display, or a passive matrix addressing display element or display.