Liquid crystal composition and display panel

Abstract

The performance of a liquid crystal composition is improved in terms of clearing point, viscosity, elastic modulus, etc., thereby providing a display panel with an improved response time. [Solution] The liquid crystal composition includes a first compound having a structure in which a cyclohexyl group and a fluorine-substituted phenyl group are linked by a single bond or a straight-chain alkyl group having a carbon number of 2, a second compound having a structure in which a bicyclohexyl group and a fluorine-substituted phenyl group are linked by a single bond or a straight-chain alkyl group having a carbon number of 2, a third compound having general formula (III-B), and a fourth compound having general formula (IV). TIFF0007670800000039.tif2785 TIFF0007670800000040.tif2691

Description

[Technical field]

[0001] The present invention relates to a display area, and in particular to a liquid crystal composition and a display panel. [Background technology]

[0002] A liquid crystal display panel realizes adjustment and control of the optical performance of the material in the liquid crystal layer by applying a voltage to the liquid crystal layer, thereby realizing the display function of the liquid crystal display panel. The quality of the physical properties (e.g., viscosity, clearing point, dielectric anisotropy, optical anisotropy, elastic modulus, etc.) of the liquid crystal material in the liquid crystal layer affects the display effect of the liquid crystal display panel in terms of response time, etc. At present, there is still room for improvement in the performance of the material applied to the liquid crystal layer, and it is difficult to improve the response time, etc. of the display panel.

[0003] Therefore, there is a strong demand for a liquid crystal composition and a display panel that can solve the above technical problems. Summary of the Invention [Problem to be solved by the invention]

[0004] The present invention provides a liquid crystal composition and a display panel that can alleviate the problem in the prior art that it is difficult to improve the response time of a display panel due to the desire for improved material performance in the liquid crystal layer. [Means for solving the problem]

[0005] The present invention provides a liquid crystal composition, comprising at least one first compound having a structure represented by general formula (IA) or general formula (IB), at least one second compound having a structure represented by general formula (II-A) or general formula (II-B), at least one third compound having a structure represented by general formula (III-A) or general formula (III-B), and at least one fourth compound having a structure represented by general formula (IV). [ka] [ka] [ka] [ka] [ka] [ka] [ka] wherein X is selected from O or S; n is an integer selected from 0 to 7, R1, R2, R3, and R4 are each independently selected from the group consisting of H, F, Cl, Br, I, CN, SCN, NCS, SF5, a substituted or unsubstituted alkyl group having 1 to 15 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 15 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 15 carbon atoms, a substituted or unsubstituted alkenyloxy group having 2 to 15 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 15 carbon atoms, and a substituted or unsubstituted alkynyloxy group having 2 to 15 carbon atoms.

[0006] Preferably, the substituted alkyl group having 1 to 15 carbon atoms, the substituted alkoxy group having 1 to 15 carbon atoms, the substituted alkenyl group having 2 to 15 carbon atoms, the substituted alkenyloxy group having 2 to 15 carbon atoms, the substituted alkynyl group having 2 to 15 carbon atoms, and the substituted alkynyloxy group having 2 to 15 carbon atoms are the end groups are each independently monosubstituted with CN or CF; one or more -CH2- groups are each independently replaced by -O-, -S-, -SO2-, -CO-, -C(O)O-, -OC(O)-, -OC(O)O-, -CF2O-, -OCF2-, -CH2-CH2-, -(CH2)3-, -CF2-CF2-, -CF2-CH2-, -CH2-CF2-, -CHF-CHF-, -CHO-, -OCH2-, -CF=CH-, -CH=CF-, -CF=CF-, -CH=CH- or -C≡C-, and heteroatoms directly bonded to C are not directly bonded to each other; and At least one of the above conditions is satisfied, that is, at least one H in the group is replaced with any one of F, Cl, Br, and I atoms.

[0007] Preferably, the liquid crystal composition further contains at least one fifth compound having a structure represented by general formula (V). [ka] (In the formula, R5 and R6 are each independently selected from the group consisting of a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 10 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 10 carbon atoms, a substituted or unsubstituted alkenyloxy group having 2 to 10 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 10 carbon atoms, and a substituted or unsubstituted alkynyloxy group having 2 to 10 carbon atoms, and H in R5 and R6 is not substituted or at least one H is substituted with any one of F, Cl, Br, and I atoms.)

[0008] Preferably, the mass fraction of the fifth compound in the liquid crystal composition is 1% or more, and the mass fraction of the fifth compound in the liquid crystal composition is 30% or less.

[0009] Preferably, the liquid crystal composition further contains at least one sixth compound having a structure represented by general formula (VI). [ka] (In the formula, R7 and R8 are each independently selected from the group consisting of a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 10 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 10 carbon atoms, a substituted or unsubstituted alkenyloxy group having 2 to 10 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 10 carbon atoms, and a substituted or unsubstituted alkynyloxy group having 2 to 10 carbon atoms, and H in R7 and R8 is not substituted or at least one H is substituted with any one of F, Cl, Br, and I atoms.)

[0010] Preferably, the mass fraction of the sixth compound in the liquid crystal composition is 1% or more, and the mass fraction of the sixth compound in the liquid crystal composition is 20% or less.

[0011] Preferably, the liquid crystal composition further contains at least one seventh compound having a structure represented by general formula (VII). [ka] (In the formula, R9, R 10 are each independently selected from the group consisting of a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 10 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 10 carbon atoms, a substituted or unsubstituted alkenyloxy group having 2 to 10 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 10 carbon atoms, and a substituted or unsubstituted alkynyloxy group having 2 to 10 carbon atoms; R and R 10 In the formula, H is not substituted or at least one H is substituted with any one of F, Cl, Br, and I atoms.

[0012] Preferably, the mass fraction of the seventh compound in the liquid crystal composition is 1% or more, and the mass fraction of the seventh compound in the liquid crystal composition is 15% or less.

[0013] Preferably, the mass fraction of the first compound in the liquid crystal composition is 1% or more, and the mass fraction of the first compound in the liquid crystal composition is 35% or less, a mass fraction of the second compound in the liquid crystal composition is 1% or more, and a mass fraction of the second compound in the liquid crystal composition is 35% or less; a mass fraction of the third compound in the liquid crystal composition is 1% or more, and a mass fraction of the third compound in the liquid crystal composition is 30% or less; The mass fraction of the fourth compound in the liquid crystal composition is 1% or more, and the mass fraction of the fourth compound in the liquid crystal composition is 30% or less.

[0014] The present invention further provides a display panel, comprising: a first substrate; a second substrate disposed on the first substrate; and a liquid crystal layer disposed between the first substrate and the second substrate; Here, the liquid crystal layer contains the above-mentioned liquid crystal composition. Effect of the Invention

[0015] The present invention improves the performance of a liquid crystal composition in terms of clearing point, viscosity, elastic modulus, etc., by including a first compound, a second compound, a third compound, and a fourth compound in the liquid crystal composition, thereby improving the response time of a display panel to which the liquid crystal composition is applied. [Brief description of the drawings]

[0016] In order to more clearly describe the technical solutions in the embodiments of the present invention, the following briefly introduces drawings necessary for the description of the embodiments. However, the drawings in the following description are only a part of the embodiments of the present invention, and it is obvious to those skilled in the art that they can obtain other drawings based on these drawings without exerting creative efforts. [Figure 1] 1 is a flow chart of a method for producing a liquid crystal composition provided in an embodiment of the present invention. [Diagram 2] FIG. 2 is a schematic structural diagram of a display panel provided in an embodiment of the present invention; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] Hereinafter, the technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, but it will be clear that the described embodiments are only some of the embodiments of the present invention, and are not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention. Furthermore, it should be understood that the specific embodiments described in this specification are only for explaining and interpreting the present invention, and do not limit the present invention. In the present invention, directional terms such as "upper" and "lower", unless otherwise stated, usually mean upper and lower in the state in which the device is actually used or in operation, and in particular, the drawing direction of the drawing, and "inner" and "outer" are related to the contour of the device.

[0018] Currently, there is a demand for improved performance of the liquid crystal layer material, but there is a problem in that it is difficult to improve the display contrast and response time of the liquid crystal display panel.

[0019] An embodiment of the present invention provides a liquid crystal composition, comprising at least one first compound having a structure represented by general formula (IA) or general formula (IB), at least one second compound having a structure represented by general formula (II-A) or general formula (II-B), at least one third compound having a structure represented by general formula (III-A) or general formula (III-B), and at least one fourth compound having a structure represented by general formula (IV). [ka] [ka] [ka] [ka] [ka] [ka] [ka] wherein X is selected from O or S; n is an integer selected from 0 to 7, R1, R2, R3, and R4 are each independently selected from the group consisting of H, F, Cl, Br, I, CN, SCN, NCS, SF5, a substituted or unsubstituted alkyl group having 1 to 15 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 15 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 15 carbon atoms, a substituted or unsubstituted alkenyloxy group having 2 to 15 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 15 carbon atoms, and a substituted or unsubstituted alkynyloxy group having 2 to 15 carbon atoms.

[0020] The first compound has a structure represented by general formula (IA) or general formula (IB), and a cyclohexyl group and a phenyl group are linked by a single bond or a linear alkyl group having two carbon atoms, which is advantageous for maintaining the rod-like structure of the first compound and facilitating nematic alignment when the liquid crystal composition is applied to a display panel. In the liquid crystal composition, the first compound has a low clearing point and low viscosity, which is advantageous for improving the response speed of a display panel when the liquid crystal composition is applied to a display panel, thereby improving the response speed of the display panel when the liquid crystal composition is applied to a display panel.

[0021] The second compound has a structure represented by general formula (II-A) or general formula (II-B), in which a cyclohexyl group and a phenyl group are linked by a single bond or a linear alkyl group having two carbon atoms, which is advantageous in maintaining the rod-like structure of the second compound and facilitates nematic alignment when the liquid crystal composition is applied to a display panel. In the liquid crystal composition, the second compound has a high clearing point and high viscosity, and is used to adjust the viscosity of the liquid crystal composition and improve the clearing point of the liquid crystal composition, thereby facilitating the improvement of the high temperature resistance of the liquid crystal composition.

[0022] The third compound has a structure represented by general formula (III-A) or general formula (III-B), and a fluorine-substituted phenyl group and an adjacent phenyl group are linked by a single bond or a linear alkyl group having 2 carbon atoms, which is advantageous to maintain the rod-like structure of the third compound and facilitates nematic alignment when the liquid crystal composition is applied to a display panel. In the liquid crystal composition, the third compound has a high clearing point, high viscosity and high optical anisotropy value, and adjusts the viscosity of the liquid crystal composition and improves the clearing point of the composition, while adjusting the optical anisotropy value of the liquid crystal composition, thereby ensuring that the optical anisotropy value of the liquid crystal composition is within a suitable range and improving the light transmittance of the liquid crystal composition, and avoiding the optical anisotropy value of the liquid crystal composition affecting the optical performance of the liquid crystal composition.

[0023] In the liquid crystal composition, the fourth compound has a structure represented by general formula (IV), and has a high clearing point, moderate viscosity, a high absolute value of dielectric anisotropy, and a high optical anisotropy value. The fourth compound adjusts the clearing point and optical anisotropy value of the liquid crystal composition while improving the absolute value of the dielectric anisotropy value of the liquid crystal composition, which is advantageous for reducing the driving voltage required for the liquid crystal composition and improving the response time when the liquid crystal composition is applied to a display panel.

[0024] In the embodiment of the present invention, the liquid crystal composition includes the first compound, the second compound, the third compound and the fourth compound, thereby improving the performance of the liquid crystal composition in terms of clearing point, viscosity, elastic modulus, etc., and thereby improving the response time of a display panel to which the liquid crystal composition is applied.

[0025] In some embodiments, the substituted alkyl group having 1 to 15 carbon atoms, the substituted alkoxy group having 1 to 15 carbon atoms, the substituted alkenyl group having 2 to 15 carbon atoms, the substituted alkenyloxy group having 2 to 15 carbon atoms, the substituted alkynyl group having 2 to 15 carbon atoms, and the substituted alkynyloxy group having 2 to 15 carbon atoms are the end groups are each independently monosubstituted with CN or CF; one or more -CH2- groups are each independently replaced by -O-, -S-, -SO2-, -CO-, -C(O)O-, -OC(O)-, -OC(O)O-, -CF2O-, -OCF2-, -CH2-CH2-, -(CH2)3-, -CF2-CF2-, -CF2-CH2-, -CH2-CF2-, -CHF-CHF-, -CHO-, -OCH2-, -CF=CH-, -CH=CF-, -CF=CF-, -CH=CH- or -C≡C-, and heteroatoms directly bonded to C are not directly bonded to each other; and At least one of the above conditions is satisfied, that is, at least one H in the group is replaced with any one of F, Cl, Br, and I atoms.

[0026] In some embodiments, when at least one of R1, R2, R3, and R4 is selected from a substituted alkyl group having 1 to 15 carbon atoms, a substituted alkoxy group having 1 to 15 carbon atoms, a substituted alkenyl group having 2 to 15 carbon atoms, a substituted alkenyloxy group having 2 to 15 carbon atoms, a substituted alkynyl group having 2 to 15 carbon atoms, or a substituted alkynyloxy group having 2 to 15 carbon atoms, at least one terminal group of R1, R2, R3, and R4 is each independently monosubstituted with H, CN, or CF3.

[0027] In some embodiments, when at least one of R1, R2, R3, and R4 is selected from a substituted alkyl group having 1 to 15 carbon atoms, a substituted alkoxy group having 1 to 15 carbon atoms, a substituted alkenyl group having 2 to 15 carbon atoms, a substituted alkenyloxy group having 2 to 15 carbon atoms, a substituted alkynyl group having 2 to 15 carbon atoms, or a substituted alkynyloxy group having 2 to 15 carbon atoms, at least one of -CH2- in R1, R2, R3, and R4 is each independently -O-, -S- , -SO2-, -CO-, -C(O)O-, -OC(O)-, -OC(O)O-, -CF2O-, -OCF2-, -CH2-CH2-, -(CH2)3-, -CF2-CF2-, -CF2-CH2-, -CH2-CF2-, -CHF-CHF-, -CHO-, -OCH2-, -CF=CH-, -CH=CF-, -CF=CF-, -CH=CH- or -C≡C-, and the heteroatoms directly bonded to C are not directly bonded to each other.

[0028] In some embodiments, when at least one of R1, R2, R3, and R4 is selected from H, a substituted alkyl group having 1 to 15 carbon atoms, a substituted alkoxy group having 1 to 15 carbon atoms, a substituted alkenyl group having 2 to 15 carbon atoms, a substituted alkenyloxy group having 2 to 15 carbon atoms, a substituted alkynyl group having 2 to 15 carbon atoms, or a substituted alkynyloxy group having 2 to 15 carbon atoms, at least one H of at least one of R1, R2, R3, and R4 is replaced with any one of F, Cl, Br, and I atoms.

[0029] In some embodiments, when selected from an unsubstituted alkyl group having 1 to 15 carbon atoms, an unsubstituted alkoxy group having 1 to 15 carbon atoms, an unsubstituted alkenyl group having 2 to 15 carbon atoms, an unsubstituted alkenyloxy group having 2 to 15 carbon atoms, an unsubstituted alkynyl group having 2 to 15 carbon atoms, or an unsubstituted alkynyloxy group having 2 to 15 carbon atoms, any H, terminal group, or -CH2- in the unsubstituted alkyl group having 1 to 15 carbon atoms, the unsubstituted alkoxy group having 1 to 15 carbon atoms, the unsubstituted alkenyl group having 2 to 15 carbon atoms, the unsubstituted alkenyloxy group having 2 to 15 carbon atoms, the unsubstituted alkynyl group having 2 to 15 carbon atoms, or the unsubstituted alkynyloxy group having 2 to 15 carbon atoms is not substituted.

[0030] In some embodiments, R1, R2, R3, and R4 are each independently selected from the group consisting of H, F, Cl, Br, a substituted or unsubstituted alkyl group having 1 to 7 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 7 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 7 carbon atoms, a substituted or unsubstituted alkenyloxy group having 2 to 7 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 7 carbon atoms, and a substituted or unsubstituted alkynyloxy group having 2 to 7 carbon atoms. When R1 and / or R2 are selected from the group consisting of a substituted alkyl group, a substituted alkoxy group, a substituted alkenyl group, a substituted alkenyloxy group, a substituted alkynyl group, and a substituted alkynyloxy group, at least one H in R1 and / or R2 is replaced with any one of F, Cl, Br, and I atoms. When R3 and / or R4 are selected from the group consisting of substituted alkyl groups, substituted alkoxy groups, substituted alkenyl groups, substituted alkenyloxy groups, substituted alkynyl groups, and substituted alkynyloxy groups, at least one H in R3 and / or R4 is replaced with any one of F, Cl, Br, and I atoms.

[0031] Preferably, R1, R2, R3, and R4 are each independently selected from the group consisting of H, F, an unsubstituted alkyl group having 1 to 7 carbon atoms, an unsubstituted alkoxy group having 1 to 7 carbon atoms, an unsubstituted alkenyl group having 2 to 7 carbon atoms, an unsubstituted alkenyloxy group having 2 to 7 carbon atoms, an unsubstituted alkynyl group having 2 to 7 carbon atoms, and an unsubstituted alkynyloxy group having 2 to 7 carbon atoms.

[0032] More preferably, R1, R2, R3, and R4 are each independently selected from the group consisting of H, F, an unsubstituted alkyl group having 1 to 5 carbon atoms, an unsubstituted alkoxy group having 1 to 5 carbon atoms, and an unsubstituted alkenyl group having 2 to 5 carbon atoms.

[0033] In some embodiments, when R1, R2, R3, and R4 are each independently selected from an unsubstituted alkyl group, an unsubstituted alkenyl group, or an unsubstituted alkynyl group, the unsubstituted alkyl group, the unsubstituted alkenyl group, and the unsubstituted alkynyl group are aliphatic hydrocarbon groups.

[0034] In some embodiments, when R1, R2, R3, and R4 are each independently selected from an unsubstituted alkyl group, the unsubstituted alkyl group may be an unsubstituted linear alkyl group or an unsubstituted branched alkyl group, and is preferably an unsubstituted linear alkyl group. When R1, R2, R3, and R4 are each independently selected from an unsubstituted linear alkyl group having 1 to 7 carbon atoms, the unsubstituted alkyl group may be selected from, for example, a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, a hexyl group, or a heptyl group.

[0035] When R1, R2, R3, and R4 are each independently selected from an unsubstituted alkenyl group, the unsubstituted alkenyl group may be an unsubstituted linear alkenyl group or an unsubstituted branched alkenyl group, and the alkenyl group may be an isomer of E-configuration or Z-configuration, and may have at least one carbon-carbon double bond and may be selected from, for example, an unsubstituted linear alkenyl group having 2 to 7 carbon atoms, more preferably a vinyl group, a prop-1-enyl group, a prop-2-enyl group, a bromo-1 ... Examples of such an alkyl group include th-enyl, but-2-enyl, but-3-enyl, pent-1-enyl, pent-2-enyl, pent-3-enyl, pent-4-enyl, hex-1-enyl, hex-2-enyl, hex-3-enyl, hex-4-enyl, hex-5-enyl, hept-1-enyl, hept-2-enyl, hept-3-enyl, hept-4-enyl, hept-5-enyl and hept-6-enyl groups.

[0036] When R1, R2, R3, and R4 are each independently selected from an unsubstituted alkynyl group, the unsubstituted alkynyl group may be an unsubstituted linear alkynyl group or an unsubstituted branched alkynyl group, and may have at least one carbon-carbon triple bond and may be selected from, for example, an unsubstituted linear alkynyl group having 2 to 7 carbon atoms, more preferably an ethynyl group, a propa-1-alkynyl group, a propa-2-alkynyl group, a buta-1-alkynyl group, a buta-2-alkynyl group, a buta-3-alkynyl group, a penta-1-alkynyl group, a penta-2-alkynyl group, or a penta-3-alkynyl group. , penta-4-alkynyl group, hexa-1-alkynyl group, hexa-2-alkynyl group, hexa-3-alkynyl group, hexa-4-alkynyl group, hexa-5-alkynyl group, hepta-1-alkynyl group, hepta-2-alkynyl group, hepta-3-alkynyl group, hepta-4-alkynyl group, hepta-5-alkynyl group or hepta-6-alkynyl group, and more preferably a propa-2-alkynyl group, buta-2-alkynyl group, buta-3-alkynyl group, penta-2-alkynyl group, penta-3-alkynyl group or penta-4-alkynyl group.

[0037] In some embodiments, n is selected from an integer between 0 and 7, inclusive, and can be, for example, 0, 1, 2, 3, 4, 5, 6, or 7. Preferably, n is 1 or 2.

[0038] In some embodiments, the liquid crystal composition further comprises at least one fifth compound having a structure represented by general formula (V). [ka] (In the formula, R5 and R6 are each independently selected from the group consisting of a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 10 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 10 carbon atoms, a substituted or unsubstituted alkenyloxy group having 2 to 10 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 10 carbon atoms, and a substituted or unsubstituted alkynyloxy group having 2 to 10 carbon atoms, and H in R5 and R6 is not substituted or at least one H is substituted with any one of F, Cl, Br, and I atoms.)

[0039] In the liquid crystal composition, the fifth compound has a high optical anisotropy value and a low viscosity, which is advantageous for adjusting the optical anisotropy value of the liquid crystal composition so that the optical anisotropy value of the liquid crystal composition is within an appropriate range, and also reduces the viscosity of the liquid crystal composition and improves the response speed of a display panel when the liquid crystal composition is applied to a display panel.

[0040] In some embodiments, when R5 and R6 are selected from an unsubstituted alkyl group having 1 to 10 carbon atoms, an unsubstituted alkoxy group having 1 to 10 carbon atoms, an unsubstituted alkenyl group having 2 to 10 carbon atoms, an unsubstituted alkenyloxy group having 2 to 10 carbon atoms, an unsubstituted alkynyl group having 2 to 10 carbon atoms, or an unsubstituted alkynyloxy group having 2 to 10 carbon atoms, the H of R5 and R6 is not substituted.

[0041] In some embodiments, the substituted alkyl group having 1 to 10 carbon atoms, the substituted alkoxy group having 1 to 10 carbon atoms, the substituted alkenyl group having 2 to 10 carbon atoms, the substituted alkenyloxy group having 2 to 10 carbon atoms, the substituted alkynyl group having 2 to 10 carbon atoms, or the substituted alkynyloxy group having 2 to 10 carbon atoms satisfies the condition that at least one H in the group is replaced with any one of F, Cl, Br, and I atoms.

[0042] When at least one of R5 and R6 is selected from a substituted alkyl group having 1 to 10 carbon atoms, a substituted alkoxy group having 1 to 10 carbon atoms, a substituted alkenyl group having 2 to 10 carbon atoms, a substituted alkenyloxy group having 2 to 10 carbon atoms, a substituted alkynyl group having 2 to 10 carbon atoms, or a substituted alkynyloxy group having 2 to 10 carbon atoms, at least one H of R5 and R6 is substituted with any one of F, Cl, Br, and I atoms.

[0043] In some embodiments, R5 and R6 are each independently selected from the group consisting of a substituted or unsubstituted alkyl group having 1 to 7 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 7 carbon atoms, and a substituted or unsubstituted alkenyl group having 2 to 7 carbon atoms. Preferably, R5 and R6 are each independently selected from the group consisting of an unsubstituted alkyl group having 1 to 7 carbon atoms, an unsubstituted alkoxy group having 1 to 7 carbon atoms, and an unsubstituted alkenyl group having 2 to 7 carbon atoms.

[0044] More preferably, R5 and R6 are each independently selected from the group consisting of an unsubstituted alkyl group having 1 to 5 carbon atoms, an unsubstituted alkoxy group having 1 to 5 carbon atoms, and an unsubstituted alkenyl group having 2 to 5 carbon atoms.

[0045] In some embodiments, when R5 and R6 are each independently selected from an unsubstituted alkyl group, the unsubstituted alkyl group may be an unsubstituted linear alkyl group or an unsubstituted branched alkyl group, preferably an unsubstituted linear alkyl group. When R5 and R6 are each independently selected from an unsubstituted linear alkyl group having 1 to 7 carbon atoms, they may be selected from, for example, a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, a hexyl group, or a heptyl group.

[0046] When R5 and R6 are each independently selected from an unsubstituted alkenyl group, the unsubstituted alkenyl group may be an unsubstituted linear alkenyl group or an unsubstituted branched alkenyl group, and the alkenyl group may be an isomer of E-configuration and Z-configuration, and may have at least one carbon-carbon double bond and may be selected from, for example, an unsubstituted linear alkenyl group having 2 to 7 carbon atoms, more preferably a vinyl group, a prop-1-enyl group, a prop-2-enyl group, a but- Examples of such an enyl group include a 1-enyl group, a but-2-enyl group, a but-3-enyl group, a pent-1-enyl group, a pent-2-enyl group, a pent-3-enyl group, a pent-4-enyl group, a hex-1-enyl group, a hex-2-enyl group, a hex-3-enyl group, a hex-4-enyl group, a hex-5-enyl group, a hept-1-enyl group, a hept-2-enyl group, a hept-3-enyl group, a hept-4-enyl group, a hept-5-enyl group, and a hept-6-enyl group.

[0047] In some embodiments, the liquid crystal composition further comprises at least one sixth compound having a structure represented by general formula (VI). [ka] (In the formula, R7 and R8 are each independently selected from the group consisting of a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 10 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 10 carbon atoms, a substituted or unsubstituted alkenyloxy group having 2 to 10 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 10 carbon atoms, and a substituted or unsubstituted alkynyloxy group having 2 to 10 carbon atoms, and H in R7 and R8 is not substituted or at least one H is substituted with any one of F, Cl, Br, and I atoms.)

[0048] In the liquid crystal composition, the sixth compound is a compound with negative dielectric anisotropy and has a high clearing point, a high optical anisotropy value and a low viscosity, which is advantageous for adjusting the clearing point and the optical anisotropy value of the liquid crystal composition and at the same time improving the response speed of the liquid crystal composition so as to improve the response time when the liquid crystal composition is applied to a display panel.

[0049] In some embodiments, when R7 and R8 are selected from an unsubstituted alkyl group having 1 to 10 carbon atoms, an unsubstituted alkoxy group having 1 to 10 carbon atoms, an unsubstituted alkenyl group having 2 to 10 carbon atoms, an unsubstituted alkenyloxy group having 2 to 10 carbon atoms, an unsubstituted alkynyl group having 2 to 10 carbon atoms, or an unsubstituted alkynyloxy group having 2 to 10 carbon atoms, the H of R7 and R8 is not substituted.

[0050] In some embodiments, the substituted alkyl group having 1 to 10 carbon atoms, the substituted alkoxy group having 1 to 10 carbon atoms, the substituted alkenyl group having 2 to 10 carbon atoms, the substituted alkenyloxy group having 2 to 10 carbon atoms, the substituted alkynyl group having 2 to 10 carbon atoms, or the substituted alkynyloxy group having 2 to 10 carbon atoms satisfies the condition that at least one H in the group is replaced with any one of F, Cl, Br, and I atoms.

[0051] When at least one of R7 and R8 is selected from a substituted alkyl group having 1 to 10 carbon atoms, a substituted alkoxy group having 1 to 10 carbon atoms, a substituted alkenyl group having 2 to 10 carbon atoms, a substituted alkenyloxy group having 2 to 10 carbon atoms, a substituted alkynyl group having 2 to 10 carbon atoms, or a substituted alkynyloxy group having 2 to 10 carbon atoms, at least one H of R7 and R8 is substituted with any one of F, Cl, Br, and I atoms.

[0052] In some embodiments, R7 and R8 are each independently selected from the group consisting of a substituted or unsubstituted alkyl group having 1 to 7 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 7 carbon atoms, and a substituted or unsubstituted alkenyl group having 2 to 7 carbon atoms. Preferably, R7 and R8 are each independently selected from the group consisting of an unsubstituted alkyl group having 1 to 7 carbon atoms, an unsubstituted alkoxy group having 1 to 7 carbon atoms, and an unsubstituted alkenyl group having 2 to 7 carbon atoms.

[0053] More preferably, R7 and R8 are each independently selected from the group consisting of an unsubstituted alkyl group having 1 to 5 carbon atoms, an unsubstituted alkoxy group having 1 to 5 carbon atoms, and an unsubstituted alkenyl group having 2 to 5 carbon atoms.

[0054] In some embodiments, when R7 and R8 are each independently selected from an unsubstituted alkyl group, the unsubstituted alkyl group may be an unsubstituted linear alkyl group or an unsubstituted branched alkyl group, and is preferably an unsubstituted linear alkyl group. When R7 and R8 are each independently selected from an unsubstituted linear alkyl group having 1 to 7 carbon atoms, they may be selected from, for example, a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, a hexyl group, or a heptyl group.

[0055] When R7 and R8 are each independently selected from an unsubstituted alkenyl group, the unsubstituted alkenyl group may be an unsubstituted linear alkenyl group or an unsubstituted branched alkenyl group, and the alkenyl group may be an isomer of E-configuration and Z-configuration, and may have at least one carbon-carbon double bond and may be selected from, for example, an unsubstituted linear alkenyl group having 2 to 7 carbon atoms, more preferably a vinyl group, a prop-1-enyl group, a prop-2-enyl group, a but- Examples of such an enyl group include a 1-enyl group, a but-2-enyl group, a but-3-enyl group, a pent-1-enyl group, a pent-2-enyl group, a pent-3-enyl group, a pent-4-enyl group, a hex-1-enyl group, a hex-2-enyl group, a hex-3-enyl group, a hex-4-enyl group, a hex-5-enyl group, a hept-1-enyl group, a hept-2-enyl group, a hept-3-enyl group, a hept-4-enyl group, a hept-5-enyl group, and a hept-6-enyl group.

[0056] In some embodiments, the liquid crystal composition further comprises at least one seventh compound having a structure represented by general formula (VII). [ka] (In the formula, R9, R 10are each independently selected from the group consisting of a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 10 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 10 carbon atoms, a substituted or unsubstituted alkenyloxy group having 2 to 10 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 10 carbon atoms, and a substituted or unsubstituted alkynyloxy group having 2 to 10 carbon atoms; R and R 10 In the formula, H is not substituted or at least one H is substituted with any one of F, Cl, Br, and I atoms.

[0057] In the liquid crystal composition, the seventh compound has a high clearing point and a high optical anisotropy value, which improves the clearing point of the liquid crystal composition and adjusts the optical anisotropy value of the liquid crystal composition, thereby improving the high temperature resistance of the liquid crystal composition, and at the same time, facilitates improving the light transmittance of the liquid crystal composition, and ensures that the light transmittance of the liquid crystal composition is within an appropriate range.

[0058] In some embodiments, R and R 10 is selected from an unsubstituted alkyl group having 1 to 10 carbon atoms, an unsubstituted alkoxy group having 1 to 10 carbon atoms, an unsubstituted alkenyl group having 2 to 10 carbon atoms, an unsubstituted alkenyloxy group having 2 to 10 carbon atoms, an unsubstituted alkynyl group having 2 to 10 carbon atoms, or an unsubstituted alkynyloxy group having 2 to 10 carbon atoms, R9 and R 10 The H in is unsubstituted.

[0059] In some embodiments, the substituted alkyl group having 1 to 10 carbon atoms, the substituted alkoxy group having 1 to 10 carbon atoms, the substituted alkenyl group having 2 to 10 carbon atoms, the substituted alkenyloxy group having 2 to 10 carbon atoms, the substituted alkynyl group having 2 to 10 carbon atoms, or the substituted alkynyloxy group having 2 to 10 carbon atoms satisfies the condition that at least one H in the group is replaced with any one of F, Cl, Br, and I atoms.

[0060] R9 and R 10is selected from the group consisting of a substituted alkyl group having 1 to 10 carbon atoms, a substituted alkoxy group having 1 to 10 carbon atoms, a substituted alkenyl group having 2 to 10 carbon atoms, a substituted alkenyloxy group having 2 to 10 carbon atoms, a substituted alkynyl group having 2 to 10 carbon atoms, and a substituted alkynyloxy group having 2 to 10 carbon atoms; 10 At least one H is replaced by an atom of F, Cl, Br, or I.

[0061] In some embodiments, R and R 10 are each independently selected from the group consisting of a substituted or unsubstituted alkyl group having 1 to 7 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 7 carbon atoms, and a substituted or unsubstituted alkenyl group having 2 to 7 carbon atoms. 10 are each independently selected from the group consisting of an unsubstituted alkyl group having 1 to 7 carbon atoms, an unsubstituted alkoxy group having 1 to 7 carbon atoms, and an unsubstituted alkenyl group having 2 to 7 carbon atoms.

[0062] More preferably, R and R 10 are each independently selected from the group consisting of an unsubstituted alkyl group having 1 to 5 carbon atoms, an unsubstituted alkoxy group having 1 to 5 carbon atoms, and an unsubstituted alkenyl group having 2 to 5 carbon atoms.

[0063] In some embodiments, R and R 10 are each independently selected from an unsubstituted alkyl group, the unsubstituted alkyl group can be an unsubstituted linear alkyl group or an unsubstituted branched alkyl group, preferably an unsubstituted linear alkyl group; R and R 10 When are each independently selected from unsubstituted linear alkyl groups having 1 to 7 carbon atoms, they can be selected from, for example, a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, a hexyl group, or a heptyl group.

[0064] R9 and R 10are each independently selected from an unsubstituted alkenyl group, the unsubstituted alkenyl group may be an unsubstituted linear alkenyl group or an unsubstituted branched alkenyl group, and the alkenyl group may be an isomer of E-configuration and Z-configuration, and may have at least one carbon-carbon double bond and may be selected from, for example, an unsubstituted linear alkenyl group having 2 to 7 carbon atoms, more preferably a vinyl group, a prop-1-enyl group, a prop-2-enyl group, a but-1-enyl group, a but ... Examples of the enyl group include but-2-enyl group, but-3-enyl group, pent-1-enyl group, pent-2-enyl group, pent-3-enyl group, pent-4-enyl group, hex-1-enyl group, hex-2-enyl group, hex-3-enyl group, hex-4-enyl group, hex-5-enyl group, hept-1-enyl group, hept-2-enyl group, hept-3-enyl group, hept-4-enyl group, hept-5-enyl group, and hept-6-enyl group.

[0065] In some embodiments, the liquid crystal composition further comprises at least one eighth compound having a structure represented by general formula (VIII). [ka] (In the formula, R 11 , R 12 are each independently selected from the group consisting of a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 10 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 10 carbon atoms, a substituted or unsubstituted alkenyloxy group having 2 to 10 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 10 carbon atoms, and a substituted or unsubstituted alkynyloxy group having 2 to 10 carbon atoms; R 11 and R 12 In the formula, H is not substituted or at least one H is substituted with any one of F, Cl, Br, and I atoms.

[0066] In the liquid crystal composition, the eighth compound has a low clearing point and low viscosity, which is advantageous for improving the response speed of a display panel when the liquid crystal composition is applied to a display panel, thereby reducing the response time of the display panel when the liquid crystal composition is applied to a display panel.

[0067] In some embodiments, the substituted alkyl group having 1 to 10 carbon atoms, the substituted alkoxy group having 1 to 10 carbon atoms, the substituted alkenyl group having 2 to 10 carbon atoms, the substituted alkenyloxy group having 2 to 10 carbon atoms, the substituted alkynyl group having 2 to 10 carbon atoms, or the substituted alkynyloxy group having 2 to 10 carbon atoms satisfies the condition that at least one H in the group is replaced with any one of F, Cl, Br, and I atoms.

[0068] R 11 and R 12 is selected from a substituted alkyl group having 1 to 10 carbon atoms, a substituted alkoxy group having 1 to 10 carbon atoms, a substituted alkenyl group having 2 to 10 carbon atoms, a substituted alkenyloxy group having 2 to 10 carbon atoms, a substituted alkynyl group having 2 to 10 carbon atoms, or a substituted alkynyloxy group having 2 to 10 carbon atoms; 11 and R 12 At least one H is replaced by an atom of F, Cl, Br, or I.

[0069] In some embodiments, R 11 and R 12 are each independently selected from the group consisting of a substituted or unsubstituted alkyl group having 1 to 7 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 7 carbon atoms, and a substituted or unsubstituted alkenyl group having 2 to 7 carbon atoms. 11 and R 12 are each independently selected from the group consisting of an unsubstituted alkyl group having 1 to 7 carbon atoms, an unsubstituted alkoxy group having 1 to 7 carbon atoms, and an unsubstituted alkenyl group having 2 to 7 carbon atoms.

[0070] More preferably, R 11 and R 12 are each independently selected from the group consisting of an unsubstituted alkyl group having 1 to 5 carbon atoms, an unsubstituted alkoxy group having 1 to 5 carbon atoms, and an unsubstituted alkenyl group having 2 to 5 carbon atoms.

[0071] In some embodiments, R 11 and R 12are each independently selected from unsubstituted alkyl groups, the unsubstituted alkyl groups can be unsubstituted linear alkyl groups or unsubstituted branched alkyl groups, preferably unsubstituted linear alkyl groups; R 11 and R 12 When are each independently selected from unsubstituted linear alkyl groups having 1 to 7 carbon atoms, they can be selected from, for example, a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, a hexyl group, or a heptyl group.

[0072] R 11 and R 12 are each independently selected from an unsubstituted alkenyl group, the unsubstituted alkenyl group may be an unsubstituted linear alkenyl group or an unsubstituted branched alkenyl group, and the alkenyl group may be an isomer of E-configuration and Z-configuration, and may have at least one carbon-carbon double bond and may be selected from, for example, an unsubstituted linear alkenyl group having 2 to 7 carbon atoms, more preferably a vinyl group, a prop-1-enyl group, a prop-2-enyl group, a but-1-enyl group, a but ... Examples of the enyl group include but-2-enyl group, but-3-enyl group, pent-1-enyl group, pent-2-enyl group, pent-3-enyl group, pent-4-enyl group, hex-1-enyl group, hex-2-enyl group, hex-3-enyl group, hex-4-enyl group, hex-5-enyl group, hept-1-enyl group, hept-2-enyl group, hept-3-enyl group, hept-4-enyl group, hept-5-enyl group, and hept-6-enyl group.

[0073] In some embodiments, the mass fraction of the first compound in the liquid crystal composition is 1% or more, and the mass fraction of the first compound in the liquid crystal composition is 35% or less, for example, the mass fraction of the first compound may be 3%, 5%, 10%, 15%, 20%, 25%, 30%, etc.; the mass fraction of the second compound in the liquid crystal composition is 1% or more, and the mass fraction of the second compound in the liquid crystal composition is 35% or less, for example, the mass fraction of the second compound may be 3%, 5%, 10%, 15%, 20%, 25%, 30%, etc.; the mass fraction of the third compound in the liquid crystal composition is 1% or more, and the mass fraction of the third compound in the liquid crystal composition is 30% or less, for example, the mass fraction of the third compound may be 3%, 5%, 10%, 15%, 20%, 25%, etc. The mass fraction of the fourth compound in the liquid crystal composition is 1% or more, and the mass fraction of the fourth compound in the liquid crystal composition is 30% or less, for example, the mass fraction of the fourth compound may be 3%, 5%, 10%, 15%, 20%, 25%, etc.

[0074] Preferably, the mass fraction of the first compound in the liquid crystal composition is 5% or more and the mass fraction of the first compound in the liquid crystal composition is 30% or less. For example, the mass fraction of the first compound may be 8%, 10%, 12%, 15%, 18%, 20%, 25%, 28%, etc.; the mass fraction of the second compound in the liquid crystal composition is 5% or more and the mass fraction of the second compound in the liquid crystal composition is 30% or less. For example, the mass fraction of the second compound may be 8%, 10%, 12%, 15%, 18%, 20%, 25%, 28%, etc.; and the mass fraction of the third compound in the liquid crystal composition is 5% or more and the mass fraction of the third compound in the liquid crystal composition is 25% or less. For example, the mass fraction of the third compound may be 5%, 8%, 10%, 12%, 15%, 20%, 22%, etc. The mass fraction of the fourth compound in the liquid crystal composition is 1% or more, and the mass fraction of the fourth compound in the liquid crystal composition is 25% or less, for example, the mass fraction of the fourth compound may be 3%, 5%, 10%, 15%, 20%, etc.

[0075] More preferably, the mass fraction of the first compound in the liquid crystal composition is 5% or more and the mass fraction of the first compound in the liquid crystal composition is 25% or less. For example, the mass fraction of the first compound may be 8%, 10%, 12%, 15%, 18%, 20%, etc.; the mass fraction of the second compound in the liquid crystal composition is 5% or more and the mass fraction of the second compound in the liquid crystal composition is 25% or less. For example, the mass fraction of the second compound may be 8%, 10%, 12%, 15%, 18%, 20%, etc.; and the mass fraction of the third compound in the liquid crystal composition is 5% or more and the mass fraction of the third compound in the liquid crystal composition is 15% or less. For example, the mass fraction of the third compound may be 8%, 9%, 10%, 11%, 12%, 14%, etc. The mass fraction of the fourth compound in the liquid crystal composition is 1% or more, and the mass fraction of the fourth compound in the liquid crystal composition is 15% or less, for example, the mass fraction of the fourth compound may be 3%, 5%, 8%, 10%, 11%, 12%, 14%, etc.

[0076] More preferably, the mass fraction of the first compound in the liquid crystal composition is 5% or more and the mass fraction of the first compound in the liquid crystal composition is 18% or less. For example, the mass fraction of the first compound may be 8%, 10%, 12%, 13%, 15%, 16%, etc.; the mass fraction of the second compound in the liquid crystal composition is 5% or more and the mass fraction of the second compound in the liquid crystal composition is 20% or less. For example, the mass fraction of the second compound may be 6%, 8%, 10%, 12%, 15%, 18%, etc.; and the mass fraction of the third compound in the liquid crystal composition is 5% or more and the mass fraction of the third compound in the liquid crystal composition is 12% or less. For example, the mass fraction of the third compound may be 6%, 7%, 8%, 9%, 10%, 11%, etc. The mass fraction of the fourth compound in the liquid crystal composition is 1% or more, and the mass fraction of the fourth compound in the liquid crystal composition is 10% or less, for example, the mass fraction of the fourth compound may be 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, etc.

[0077] In some embodiments, when the liquid crystal composition further comprises the fifth compound, the mass fraction of the fifth compound in the liquid crystal composition is 1% or more, and the mass fraction of the fifth compound in the liquid crystal composition is 30% or less, for example, 3%, 5%, 10%, 15%, 20%, 25%, etc. Preferably, the mass fraction of the fifth compound in the liquid crystal composition is 3% or more, and the mass fraction of the fifth compound in the liquid crystal composition is 20% or less, for example, 5%, 8%, 10%, 15%, 18%, etc. More preferably, the mass fraction of the fifth compound in the liquid crystal composition is 5% or more, and the mass fraction of the fifth compound in the liquid crystal composition is 15% or less, for example, 6%, 8%, 10%, 12%, etc.

[0078] In some embodiments, when the liquid crystal composition further comprises the sixth compound, the mass fraction of the sixth compound in the liquid crystal composition is 1% or more, and the mass fraction of the sixth compound in the liquid crystal composition is 20% or less, for example, 3%, 5%, 10%, 15%, 18%, etc. Preferably, the mass fraction of the sixth compound in the liquid crystal composition is 3% or more, and the mass fraction of the sixth compound in the liquid crystal composition is 15% or less, for example, 5%, 8%, 10%, 12%, etc. More preferably, the mass fraction of the sixth compound in the liquid crystal composition is 3% or more, and the mass fraction of the sixth compound in the liquid crystal composition is 10% or less, for example, 4%, 5%, 6%, 7%, 8%, 9%, etc.

[0079] In some embodiments, when the liquid crystal composition further comprises the seventh compound, the mass fraction of the seventh compound in the liquid crystal composition is 1% or more, and the mass fraction of the seventh compound in the liquid crystal composition is 15% or less, for example, 2%, 3%, 5%, 10%, 12%, etc. Preferably, the mass fraction of the seventh compound in the liquid crystal composition is 1% or more, and the mass fraction of the seventh compound in the liquid crystal composition is 10% or less, for example, 2%, 3%, 5%, 8%, etc. More preferably, the mass fraction of the seventh compound in the liquid crystal composition is 2% or more, and the mass fraction of the seventh compound in the liquid crystal composition is 6% or less, for example, 3%, 4%, 5%, etc.

[0080] In some embodiments, the mass fraction of the eighth compound in the liquid crystal composition is 15% or more, and the mass fraction of the eighth compound in the liquid crystal composition is 70% or less, for example, 18%, 20%, 22%, 25%, 28%, 30%, 32%, 35%, 38%, 40%, 42%, 45%, 46%, 48%, 50%, 52%, 55%, 58%, 60%, 62%, 65%, 68%, etc. Preferably, the mass fraction of the eighth compound in the liquid crystal composition is 20% or more, and the mass fraction of the eighth compound in the liquid crystal composition is 60% or less. In some embodiments, the optical anisotropy value of the liquid crystal composition at 25°C is not less than 0.09, and the optical anisotropy value of the liquid crystal composition at 25°C is not more than 0.22, for example, 0.1, 0.105, 0.11, 0.115, 0.12, 0.125, 0.15, 0.175, 0.2, 0.21, etc., so as to make the optical anisotropy value of the liquid crystal composition within an appropriate range, improve the light transmittance of the liquid crystal composition, ensure that the light transmittance of the liquid crystal composition is within an appropriate range, and avoid the optical anisotropy value of the liquid crystal composition affecting the optical performance of the liquid crystal composition.

[0081] In some embodiments, the rotational viscosity of the liquid crystal composition at 25° C. is 40 mPa·s or more, and the rotational viscosity of the liquid crystal composition at 25° C. is 100 mPa·s or less, e.g., 45 mPa·s, 50 mPa·s, 55 mPa·s, 60 mPa·s, 65 mPa·s, 70 mPa·s, 75 mPa·s, 80 mPa·s, 85 mPa·s, 90 mPa·s, 95 mPa·s, etc., so as to make the rotational viscosity of the liquid crystal composition within an appropriate range, improve the rotational speed of the liquid crystal composition, ensure that the response time of the liquid crystal composition is within an appropriate range, and avoid the rotational viscosity of the liquid crystal composition affecting the performance of the liquid crystal composition.

[0082] In some embodiments, the bending modulus of the liquid crystal composition is 10 or more, the bending modulus of the liquid crystal composition is 26 or less, for example, 11, 12, 13, 14, 15, 18, 20, 22, 24, 25, etc., and / or the splay modulus of the liquid crystal composition is 10 or more, the splay modulus of the liquid crystal composition is 26 or less, for example, 12, 13, 14, 15, 18, 20, 22, 24, 25, etc., and the bending modulus of the liquid crystal composition and / or the splay modulus of the liquid crystal composition are within the above ranges, which is advantageous for the liquid crystal composition to obtain an appropriate average value of the elastic modulus, and effectively improves the response speed of the display panel when the liquid crystal composition is applied to the display panel to obtain a faster response time.

[0083] In some embodiments, the dielectric anisotropy value of the liquid crystal composition at 25°C is less than 0, and the dielectric anisotropy value of the liquid crystal composition at 25°C is -5 or more, for example, -4.8, -4.5, -4, -3.5, -3, -2, -1, etc., which is advantageous for reducing the driving voltage required to drive the liquid crystal composition, thereby reducing the driving voltage of a liquid crystal display panel to which the liquid crystal composition is applied, and reducing the power consumption of a liquid crystal display panel to which the liquid crystal composition is applied.

[0084] In some embodiments, the clearing point of the liquid crystal composition is preferably 70°C to 135°C. For example, in order to avoid a decrease in high temperature resistance of the liquid crystal composition due to the clearing point being too low, the clearing point of the liquid crystal composition may be 75°C, 77°C, 78°C, 80°C, 82°C, 84°C, 88°C, 90°C, 92°C, 95°C, 100°C, 105°C, 110°C, 115°C, 120°C, 125°C, 130°C, etc.

[0085] Referring to FIG. 1, an exemplary method for preparing the liquid crystal composition provided in the present invention is as follows.

[0086] The method for producing the liquid crystal composition includes steps S100 to S300.

[0087] S100: The first compound, the second compound, the third compound, and the fourth compound are weighed out in a first order by mass percentage and mixed to obtain a first mixture.

[0088] In the first order, the first compound, the second compound, the third compound, and the fourth compound are preferably weighed and mixed in order from lowest to highest melting point.

[0089] When the liquid crystal composition further includes at least one of the fifth compound, the sixth compound, and the seventh compound, the first mixture further includes mixing at least one of the fifth compound, the sixth compound, and the seventh compound with the first compound, the second compound, the third compound, and the fourth compound in the first order to form the first mixture.

[0090] S200: The first mixture is stirred at a first heating temperature to thoroughly mix the first compound, the second compound, the third compound, and the fourth compound in the first mixture.

[0091] The first heating temperature is preferably 60°C to 100°C.

[0092] When the first mixture contains at least one of the fifth compound, the sixth compound, and the seventh compound, the at least one of the fifth compound, the sixth compound, and the seventh compound is thoroughly mixed with the first compound, the second compound, the third compound, and the fourth compound.

[0093] S300: The first mixture is cooled to room temperature and packaged to obtain the liquid crystal composition.

[0094] Exemplary combinations of the liquid crystal composition of the present invention are as shown in the following exemplary Examples 1 to 5.

[0095] Example 1 Table 1 shows the structural formula and mass fraction of each compound in the liquid crystal composition selected in this example.

[0096] [Table 1]

[0097] The liquid crystal composition obtained in Example 1 had the following performance parameters: Tni: 82°C, γ1: 64 mPa·s, Δn: 0.105, ne: 1.582, Δε: -4.3, ε ⊥ :8.0,K 11 :13.2,K 33 The liquid crystal composition had a refractive index of 15.3, and no crystals were precipitated even after the liquid crystal composition was left at −20° C. for 480 hours. Here, Tni represents the clearing point of the liquid crystal composition, γ1 represents the rotational viscosity of the liquid crystal composition at 25° C., Δn represents the optical anisotropy value of the liquid crystal composition at 25° C., ne represents the refractive index of the extraordinary light of the liquid crystal composition, Δε represents the dielectric anisotropy value of the liquid crystal composition at 25° C., and ε ⊥ represents the dielectric constant of the liquid crystal composition in the direction perpendicular to the long axis of the liquid crystal molecule, and K 11 represents the bending elastic modulus of the liquid crystal composition, and K 33 represents the splay modulus of the liquid crystal composition.

[0098] Example 2 Table 2 shows the structural formula and mass fraction of each compound in the liquid crystal composition selected in this example.

[0099] [Table 2]

[0100] The liquid crystal composition obtained in Example 2 had the following performance parameters: Tni: 83°C, γ1: 68 mPa·s, Δn: 0.098, ne: 1.565, Δε: -4.0, ε ⊥ :7.8,K 11 :14.5,K 33 The liquid crystal composition did not precipitate crystals even after being left at -20°C for 480 hours.

[0101] Example 3 Table 3 shows the structural formula and mass fraction of each compound in the liquid crystal composition selected in this example.

[0102] [Table 3]

[0103] The liquid crystal composition obtained in Example 3 had the following performance parameters: Tni: 77°C, γ1: 70 mPa·s, Δn: 0.121, ne: 1.633, Δε: -2.4, ε ⊥ :6.3,K 11 :14.5,K 33 The liquid crystal composition did not precipitate crystals even after being left at -20°C for 480 hours.

[0104] Example 4 Table 4 shows the structural formula and mass fraction of each compound in the liquid crystal composition selected in this example.

[0105] [Table 4]

[0106] The liquid crystal composition obtained in Example 4 had the following performance parameters: Tni: 80°C, γ1: 79 mPa·s, Δn: 0.111, ne: 1.591, Δε: -4.7, ε ⊥ :8.5,K 11 :13.5,K 33 The liquid crystal composition did not precipitate crystals even after being left at -20°C for 480 hours.

[0107] Example 5 Table 5 shows the structural formula and mass fraction of each compound in the liquid crystal composition selected in this example.

[0108] [Table 5]

[0109] The liquid crystal composition obtained in Example 5 had the following performance parameters: Tni: 80°C, γ1: 56 mPa·s, Δn: 0.107, ne: 1.586, Δε: -3.6, ε ⊥ :7.3,K 11 :13.1,K 33 The liquid crystal composition did not precipitate crystals even after being left at -20°C for 480 hours.

[0110] Comparative Example 1 Table 6 shows the structural formula and mass fraction of each compound in the liquid crystal composition selected in this comparative example.

[0111] [Table 6]

[0112] The liquid crystal composition obtained in Comparative Example 1 had the following performance parameters: Tni: 78°C, γ1: 62 mPa·s, Δn: 0.106, ne: 1.580, Δε: -3.3, ε ⊥ :6.7,K 11 :14.2,K 33 The liquid crystal composition did not precipitate crystals even after being left at -20°C for 480 hours.

[0113] Comparative Example 2 Table 7 shows the structural formula and mass fraction of each compound in the liquid crystal composition selected in this comparative example.

[0114] [Table 7]

[0115] The liquid crystal composition obtained in Comparative Example 2 had the following performance parameters: Tni: 74°C, γ1: 75 mPa·s, Δn: 0.104, ne: 1.578, Δε: -3.6, ε ⊥ :7.6,K 11 :12.3,K 33 The liquid crystal composition did not precipitate crystals even after being left at -20°C for 480 hours.

[0116] The five sets of liquid crystal compositions provided in the above Examples 1 to 5 all have a clearing point between 77°C and 83°C, allowing the liquid crystal composition to have good high temperature resistance; they all have a rotational viscosity at 25°C between 56mPa·s and 79mPa·s, allowing the liquid crystal composition to have a good rotation speed, which is advantageous for shortening the response time of the liquid crystal composition; an optical anisotropy value at 25°C between 0.098 and 0.121, allowing the liquid crystal composition to have good light transmittance; a dielectric anisotropy value at 25°C between -4.7 and -2.4, which is advantageous for driving the liquid crystal composition at a low driving voltage, thereby reducing the power consumption of a display panel to which the liquid crystal composition is applied; and a flexural modulus of the liquid crystal composition between 13.1 and 14.5, and a splay modulus of the liquid crystal composition between 14.7 and 19.6, which is advantageous for improving the average elastic modulus of the liquid crystal composition, which effectively shortens the response time of the display panel when the liquid crystal composition is applied to the display panel. In Example 5, the fourth compound represented by general formula (IV) is added to the liquid crystal composition, which effectively reduces the viscosity of the liquid crystal composition in Example 5 and reduces the ratio of the viscosity to the bending modulus, thereby more effectively improving the response speed of the liquid crystal composition and improving the response time of the display panel when the liquid crystal composition is applied to a display panel. In Example 4, the fourth compound represented by general formula (IV) is added to the liquid crystal composition in Example 4, which effectively reduces the viscosity to the bending modulus of the liquid crystal composition in Example 4, compared to Comparative Example 2, which effectively reduces the ratio of the viscosity to the bending modulus of the liquid crystal composition in Example 4, thereby more effectively improving the response speed of the liquid crystal composition and improving the response time of the display panel when the liquid crystal composition is applied to a display panel.

[0117] 2, an embodiment of the present invention further provides a display panel 100, which includes a first substrate 101, a second substrate 102 disposed on the first substrate 101, and a liquid crystal layer 103 disposed between the first substrate 101 and the second substrate 102. Here, the liquid crystal layer 103 includes the liquid crystal composition described above.

[0118] The first substrate 101 may be an array substrate, and the second substrate 102 may be a color filter substrate. In some embodiments, when the first substrate 101 is an array substrate, the first substrate 101 includes a first substrate, an active layer located on the first substrate, a first insulating layer located on the active layer, a gate layer located on the first insulating layer, a second insulating layer located on the gate layer, a source-drain layer located on the second insulating layer, and a third insulating layer located on the source-drain layer, the source-drain layer including a source and a drain. The display panel further includes a common electrode layer and a pixel electrode layer, the pixel electrode layer is located on a side of the third insulating layer away from the first substrate, and the pixel electrode layer includes a pixel electrode electrically connected to the source or the drain. The common electrode layer may include a common electrode, and the common electrode layer may be disposed on the first substrate 101, and the common electrode layer may be located between the pixel electrode layer and the source-drain layer, or the common electrode layer may be located on a side of the pixel electrode layer away from the first substrate, and the common electrode layer may be disposed on the second substrate 102 including a second substrate, and the common electrode layer may be located on a side of the second substrate closer to the liquid crystal layer. The display panel further includes a color filter layer, which may be disposed on a side of the first substrate closer to the liquid crystal layer or on a side of the second substrate closer to the liquid crystal layer.

[0119] The display panel 100 may be a display panel of a display mode such as VA (Vertical Alignment), ECB (Electrically Controlled Birefringence), FFS (Fringe Field Switching) or IPS (In-Plane Switching).

[0120] The present invention improves the performance of a liquid crystal composition in terms of clearing point, viscosity, elastic modulus, etc., by including a first compound, a second compound, a third compound, and a fourth compound in the liquid crystal composition, thereby improving the response time of a display panel to which the liquid crystal composition is applied.

[0121] The embodiments of the present invention disclose a liquid crystal composition and a display panel, the liquid crystal composition comprising at least one first compound having a structure represented by general formula (IA) or general formula (IB), at least one second compound having a structure represented by general formula (II-A) or general formula (II-B), at least one third compound having a structure represented by general formula (III-A) or general formula (III-B), and at least one fourth compound having a structure represented by general formula (IV). By including the first compound, the second compound, the third compound, and the fourth compound in the liquid crystal composition, the present invention improves the performance of the liquid crystal composition in terms of clearing point, viscosity, elastic modulus, etc., thereby improving the response time of the display panel to which the liquid crystal composition is applied.

[0122] The liquid crystal composition and display panel provided in the examples of the present invention have been described in detail above. In this specification, the principles and embodiments of the present invention have been described using specific examples. The explanation of the above examples is merely intended to aid in understanding the method of the present invention and its core idea. Furthermore, a person skilled in the art may make changes to the specific embodiments and application scope based on the idea of ​​the present invention. As such, the present specification should not be construed as limiting the present invention.

Claims

1. A liquid crystal composition comprising at least one first compound having a structure represented by general formula (IA) or general formula (IB), at least one second compound having a structure represented by general formula (II-A) or general formula (II-B), at least one third compound having a structure represented by general formula (III-A) or general formula (III-B), at least one fourth compound having a structure represented by general formula (IV), and at least one sixth compound having a structure represented by general formula (VI). 【Chemistry 1】 【Chemistry 2】 【Chemistry 3】 【Chemistry 4】 【Chemistry 5】 【Chemistry 6】 【Chemistry 7】 【Chemistry 9】 wherein X is selected from O or S; n is selected from an integer of 0 to 7, R １ , R ２ , R ３ , R ４ are each independently H, F, Cl, Br, I, CN, SCN, NCS, or SF ５ , a substituted or unsubstituted alkyl group having 1 to 15 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 15 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 15 carbon atoms, a substituted or unsubstituted alkenyloxy group having 2 to 15 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 15 carbon atoms, and a substituted or unsubstituted alkynyloxy group having 2 to 15 carbon atoms; R 7 and R 8 are each independently selected from the group consisting of a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 10 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 10 carbon atoms, a substituted or unsubstituted alkenyloxy group having 2 to 10 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 10 carbon atoms, and a substituted or unsubstituted alkynyloxy group having 2 to 10 carbon atoms, and H in R 7 and R 8 is not substituted or at least one H is substituted with any one of F, Cl, Br, and I atoms.

2. The substituted alkyl group having 1 to 15 carbon atoms, the substituted alkoxy group having 1 to 15 carbon atoms, the substituted alkenyl group having 2 to 15 carbon atoms, the substituted alkenyloxy group having 2 to 15 carbon atoms, the substituted alkynyl group having 2 to 15 carbon atoms, and the substituted alkynyloxy group having 2 to 15 carbon atoms are The end groups are each independently CN or CF ３ being monosubstituted with At least one of the groups -CH ２ - is independently -O-, -S-, or -SO ２ -, -CO-, -C(O)O-, -OC(O)-, -OC(O)O-, -CF ２ O-, -OCF ２ --, --CH ２ -CH ２ -, -(CH ２ ) ３ -, -CF ２ -CF ２ -, -CF ２ -CH ２ --, --CH ２ -CF ２ -, -CHF-CHF-, -CH ２ O-, -OCH ２ Heteroatoms which are substituted with -, -CF=CH-, -CH=CF-, -CF=CF-, -CH=CH- or -C≡C- and are directly bonded to C are not directly bonded to each other; and 2. The liquid crystal composition according to claim 1, which satisfies at least one of the above conditions that at least one H of the groups is replaced with any one of F, Cl, Br and I atoms.

3. The liquid crystal composition according to claim 1 , further comprising at least one fifth compound having a structure represented by general formula (V): 【Chemistry 8】 (In the formula, R ５ , R ６ are each independently selected from the group consisting of a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 10 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 10 carbon atoms, a substituted or unsubstituted alkenyloxy group having 2 to 10 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 10 carbon atoms, and a substituted or unsubstituted alkynyloxy group having 2 to 10 carbon atoms; R ５ and R ６ In the formula, H is not substituted or at least one H is substituted with any one of F, Cl, Br, and I atoms.

4. 4. The liquid crystal composition according to claim 3, wherein the mass fraction of the fifth compound in the liquid crystal composition is 1% or more and the mass fraction of the fifth compound in the liquid crystal composition is 30% or less.

5. 2. The liquid crystal composition according to claim 1, wherein the mass fraction of the sixth compound in the liquid crystal composition is 1% or more, and the mass fraction of the sixth compound in the liquid crystal composition is 20% or less.

6. The liquid crystal composition according to claim 1 , further comprising at least one seventh compound having a structure represented by general formula (VII): 【Chemistry 10】 (In the formula, R ９ , R １０ are each independently selected from the group consisting of a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 10 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 10 carbon atoms, a substituted or unsubstituted alkenyloxy group having 2 to 10 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 10 carbon atoms, and a substituted or unsubstituted alkynyloxy group having 2 to 10 carbon atoms; R ９ and R １０ In the formula, H is not substituted or at least one H is substituted with any one of F, Cl, Br, and I atoms.

7. 7. The liquid crystal composition according to claim 6, wherein the mass fraction of the seventh compound in the liquid crystal composition is 1% or more, and the mass fraction of the seventh compound in the liquid crystal composition is 15% or less.

8. a mass fraction of the first compound in the liquid crystal composition is 1% or more, and a mass fraction of the first compound in the liquid crystal composition is 35% or less; a mass fraction of the second compound in the liquid crystal composition is 1% or more, and a mass fraction of the second compound in the liquid crystal composition is 35% or less; a mass fraction of the third compound in the liquid crystal composition is 1% or more, and a mass fraction of the third compound in the liquid crystal composition is 30% or less; The liquid crystal composition according to any one of claims 1 to 7, characterized in that a mass fraction of the fourth compound in the liquid crystal composition is 1% or more, and a mass fraction of the fourth compound in the liquid crystal composition is 30% or less.

9. A display panel, comprising: a first substrate; a second substrate disposed on the first substrate; and a liquid crystal layer disposed between the first substrate and the second substrate; The display panel according to claim 1, wherein the liquid crystal layer contains a liquid crystal composition according to any one of claims 1 to 7.

Images