Liquid crystal compositions and display panels

Abstract

To improve properties of liquid crystal compositions such as the clearing point, viscosity, and elastic coefficient, and thereby provide display panels improved in the response time.SOLUTION: A liquid composition comprises: a first compound including a structure where a cyclohexyl group and a fluorine-substituted phenyl group are linked through a single bond or a linear alkyl group having two carbon atoms; a second compound including a structure where a bicyclohexyl group and a fluorine-substituted phenyl group are linked through a single bond or a linear alkyl group having two carbon atoms; a third compound represented by the general formula (III-B); and a fourth compound represented by the general formula (IV).SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to a display area, and more specifically, to a liquid crystal composition and a display panel.

Background Art

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

[0003] Therefore, a liquid crystal composition and a display panel for solving the above technical problems are strongly desired.

Summary of the Invention

Problems to be Solved by the Invention

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

Means for Solving the Problems

[0005] The present invention provides a liquid crystal composition, which includes at least one first compound having a structure represented by general formula (I-A) or general formula (I-B), 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).

Chemical Formula

[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 each have a terminal group independently mono-substituted with CN or CF 3 , one or more of the -CH 2 - are each independently -O-, -S-, -SO 2 -, -CO-, -C(O)O-, -OC(O)-, -OC(O)O-, -CF 2 O-, -OCF2 -,-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 -,-CF=CH-,-CH=CF-,-CF=CF-,-CH=CH- or -C≡C- substituted, and heteroatoms directly bonded to C are not directly bonded to each other, and at least one of the H in the group is substituted with any one of the atoms F, Cl, Br, I, satisfying at least one of the above conditions.

[0007] Preferably, the liquid crystal composition further contains at least one fifth compound having a structure represented by the general formula (V).

Chemical formula

[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 the general formula (VI). [Chemical formula] (In the formula, R 7 , 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 unsubstituted or at least one H is substituted with any one of the atoms F, Cl, Br, and I.)

[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 the general formula (VII). [Chemical formula] (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, and H in R 9 and R 10 is unsubstituted or at least one H is substituted with any one of the atoms F, Cl, Br, and I.)

[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, 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, 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, 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, including a first substrate, a second substrate located on the first substrate, and a liquid crystal layer located between the first substrate and the second substrate, wherein the liquid crystal layer includes the liquid crystal composition described above.

Advantages of the Invention

[0015] 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.

Brief Description of the Drawings

[0016] To more clearly explain the technical solutions in the embodiments of the present invention, the drawings required for the description of the embodiments are briefly introduced below. However, the drawings in the following description are only a part of the embodiments of the present invention, and it is obvious that those skilled in the art can obtain other drawings based on these drawings without creative efforts.

Figure 1

Figure 2

Embodiments for Carrying Out the Invention

[0017] Hereinafter, with reference to the drawings in the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, not all 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" generally mean upper and lower in the state where the device is actually used or operating, unless otherwise stated, especially in the drawing direction of the drawings. "Inner" and "outer" relate to the outline of the device.

[0018] Currently, since the performance improvement of the material of the liquid crystal layer is desired, there is a problem that it is difficult to improve the display contrast and response time of the liquid crystal display panel.

[0019] The embodiments of the present invention provide a liquid crystal composition, which includes at least one first compound having a structure represented by general formula (I-A) or general formula (I-B), 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).

Chemical formula

Chemical formula

Chemical formula

[0020] The first compound has a structure represented by general formula (I-A) or general formula (I-B), and a cyclohexyl group and a phenyl group are linked by a single bond or a linear alkyl group having 2 carbon atoms, which is advantageous for maintaining the rod-like structure of the first compound and facilitating the 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 a low viscosity, which is advantageous for improving the response speed of the display panel when the liquid crystal composition is applied to the display panel, thereby improving the response speed of the display panel when the liquid crystal composition is applied to the 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 2 carbon atoms, which is advantageous for maintaining the rod-like structure of the second compound and facilitating the 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 a 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 performance of the liquid crystal composition.

[0022] The third compound has a structure represented by general formula (III-A) or general formula (III-B), in which 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 for maintaining the rod-like structure of the third compound and facilitating the 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, a high viscosity and a high optical anisotropy value. By adjusting the viscosity of the liquid crystal composition and improving the clearing point of the composition, and at the same time adjusting the optical anisotropy value of the liquid crystal composition, the optical anisotropy value of the liquid crystal composition is within an appropriate range, the light transmittance of the liquid crystal composition is improved, and the light transmittance of the liquid crystal composition is ensured to be within an appropriate range, and the influence of the optical anisotropy value of the liquid crystal composition on the optical performance of the liquid crystal composition is avoided.

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

[0024] Examples of the present invention include a liquid crystal composition containing a first compound, a second compound, a third compound, and a fourth compound, which improves the performance of the liquid crystal composition in terms of the clearing point, viscosity, elastic modulus, etc., thereby improving the response time of the 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 each independently monosubstituted at the terminal group with CN or CF 3 and one or more of the -CH 2 - groups are each independently -O-, -S-, -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 -,-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, and at least one of the above conditions is satisfied, that is, at least one H in the group is substituted with any one of the atoms F, Cl, Br, or I.

[0026] In some embodiments, R 1 , R 2 , R 3 , R 4When at least one of them 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, R 1 and R 2 and R 3 and R 4 at least one of the terminal groups is each independently H, CN or CF 3 monosubstituted by.

[0027] In some embodiments, when at least one of R 1 and R 2 and R 3 and R 4 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, R 1 and R 2 and R 3 and R 4 at least one of the one or more -CH 2 - is each independently -O-, -S-, -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 -, -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, R 1 , R 2 , R 3 , R 4 When at least one of 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 R 1 , R 2 , R 3 , R 4 is substituted with any one of the atoms F, Cl, Br, and I.

[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 -CH 2 - of 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 unsubstituted.

[0030] In some embodiments, R 1 , R 2 , R 3 , R 4 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. R 1 and / or R 2When 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, R 1 and / or R 2 at least one H of is substituted with an atom of any one of F, Cl, Br, and I. R 3 and / or R 4 When 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, R 3 and / or R 4 at least one H of is substituted with an atom of any one of F, Cl, Br, and I.

[0031] Preferably, R 1 , R 2 , R 3 , R 4 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, R 1 , R 2 , R 3 , R 4 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 R 1 , R 2 , R 3 , R 4 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, R1 , R 2 , R 3 , R 4 , when each of R 1 , R 2 , R 3 , R 4 , when each of R

[0035] R 1 , R 2 , R 3 , R 4 , when each of R

[0036] R 1 , R 2 , R 3 , R 4When each is independently selected from unsubstituted alkynyl groups, the unsubstituted alkynyl group can be an unsubstituted linear alkynyl group or an unsubstituted branched alkynyl group, and has at least one carbon-carbon triple bond. For example, it can be selected from unsubstituted linear alkynyl groups having 2 to 7 carbon atoms, more preferably an ethynyl group, a prop-1-alkynyl group, a prop-2-alkynyl group, a but-1-alkynyl group, a but-2-alkynyl group, a but-3-alkynyl group, a pent-1-alkynyl group, a pent-2-alkynyl group, a pent-3-alkynyl group, a pent-4-alkynyl group, a hex-1-alkynyl group, a hex-2-alkynyl group, a hex-3-alkynyl group, a hex-4-alkynyl group, a hex-5-alkynyl group, a hept-1-alkynyl group, a hept-2-alkynyl group, a hept-3-alkynyl group, a hept-4-alkynyl group, a hept-5-alkynyl group or a hept-6-alkynyl group, etc., and even more preferably a prop-2-alkynyl group, a but-2-alkynyl group, a but-3-alkynyl group, a pent-2-alkynyl group, a pent-3-alkynyl group or a pent-4-alkynyl group.

[0037] In some embodiments, n is selected from integers from 0 to 7, for example, it can be 0, 1, 2, 3, 4, 5, 6, 7. Preferably, n can be 1 or 2.

[0038] In some embodiments, the liquid crystal composition further comprises at least one fifth compound having a structure represented by the general formula (V).

Chemical formula

[0039] In the liquid crystal composition, the fifth compound has a high optical anisotropy value and a low viscosity, and 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 for reducing the viscosity of the liquid crystal composition, and improving the response speed of the display panel when the liquid crystal composition is applied to the display panel.)

[0040] In some embodiments, R 5 and R 6 When 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 R 5 and R 6 is unsubstituted.)

[0041] In some embodiments, 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 satisfies the condition that at least one H in the group is substituted with an atom of any of F, Cl, Br, and I.)

[0042] R 5 and R 6 When at least one of them 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 R 5 and R 6 is substituted with an atom of any of F, Cl, Br, and I.)

[0043] In some embodiments, R 5 and R 6 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, R 5 and R 6 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, R 5 and R 6 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 R 5 and R 6 are each independently selected from unsubstituted alkyl groups, the unsubstituted alkyl group can be an unsubstituted straight-chain alkyl group or an unsubstituted branched alkyl group, preferably an unsubstituted straight-chain alkyl group, and R 5 and R 6 when each independently selected from unsubstituted straight-chain alkyl groups having 1 to 7 carbon atoms, 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.

[0046] R 5 and R 6When each is independently selected from unsubstituted alkenyl groups, the unsubstituted alkenyl group can be an unsubstituted linear alkenyl group or an unsubstituted branched alkenyl group, and the alkenyl group can be isomers of E configuration and Z configuration, and has at least one carbon-carbon double bond, for example, it can be selected from unsubstituted linear alkenyl groups having 2 to 7 carbon atoms, more preferably vinyl group, prop-1-enyl group, prop-2-enyl group, but-1-enyl group, 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, hept-6-enyl group and the like.

[0047] In some embodiments, the liquid crystal composition further comprises at least one sixth compound having a structure represented by general formula (VI).

Chemical formula

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

[0049] In some embodiments, R 7 and R 8 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. When this is the case, H of R 7 and R 8 is unsubstituted.

[0050] In some embodiments, 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 satisfies the condition that at least one H of the group is substituted with any one of the atoms F, Cl, Br, and I.

[0051] R 7 and R 8 If at least one of them 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 R 7 and R 8 is substituted with any one of the atoms F, Cl, Br, and I.

[0052] In some embodiments, R 7 and R 8is 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, R 7 and R 8 are 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, R 7 and R 8 are 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 R 7 and R 8 are each independently selected from unsubstituted alkyl groups, the unsubstituted alkyl group can be an unsubstituted straight-chain alkyl group or an unsubstituted branched alkyl group, preferably an unsubstituted straight-chain alkyl group, and when R 7 and R 8 are each independently selected from unsubstituted straight-chain 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.

[0055] R 7 and R 8When each is independently selected from unsubstituted alkenyl groups, the unsubstituted alkenyl group can be an unsubstituted linear alkenyl group or an unsubstituted branched alkenyl group, and the alkenyl group can be isomers of E configuration and Z configuration, and has at least one carbon-carbon double bond, for example, it can be selected from unsubstituted linear alkenyl groups having 2 to 7 carbon atoms, more preferably vinyl group, prop-1-enyl group, prop-2-enyl group, but-1-enyl group, 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, hept-6-enyl group and the like.

[0056] In some embodiments, the liquid crystal composition further comprises at least one seventh compound having a structure represented by general formula (VII).

Chemical formula

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

[0058] In some embodiments, R 9 and R 10 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 in R 9 and R 10 is unsubstituted.

[0059] In some embodiments, 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 satisfies the condition that at least one H in the group is substituted with any one of F, Cl, Br, and I atoms.

[0060] R 9 and R 10 If at least one of them 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 R 9 and R 10 is substituted with any one of F, Cl, Br, and I atoms.

[0061] In some embodiments, R 9 and R 10is 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, R 9 and R 10 are 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 9 and R 10 are 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, when R 9 and R 10 are independently selected from unsubstituted alkyl groups, the unsubstituted alkyl group can be an unsubstituted straight-chain alkyl group or an unsubstituted branched alkyl group, preferably an unsubstituted straight-chain alkyl group, and when R 9 and R 10 are independently selected from unsubstituted straight-chain 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] R 9 and R 10When each is independently selected from unsubstituted alkenyl groups, the unsubstituted alkenyl group can be an unsubstituted linear alkenyl group or an unsubstituted branched alkenyl group, and the alkenyl group can be isomers of E configuration and Z configuration, and has at least one carbon-carbon double bond, for example, it can be selected from unsubstituted linear alkenyl groups having 2 to 7 carbon atoms, more preferably vinyl group, prop-1-enyl group, prop-2-enyl group, but-1-enyl group, but-2-enyl group, but-3-enyl group, penta-1-enyl group, penta-2-enyl group, penta-3-enyl group, penta-4-enyl group, hexa-1-enyl group, hexa-2-enyl group, hexa-3-enyl group, hexa-4-enyl group, hexa-5-enyl group, hepta-1-enyl group, hepta-2-enyl group, hepta-3-enyl group, hepta-4-enyl group, hepta-5-enyl group, hepta-6-enyl group and the like.

[0065] In some embodiments, the liquid crystal composition further comprises at least one eighth compound having a structure represented by general formula (VIII).

Chemical formula

[0066] In the liquid crystal composition, the eighth compound has a low clearing point and a low viscosity, which is advantageous for improving the response speed of the display panel when the liquid crystal composition is applied to the display panel, thereby reducing the response time of the display panel when the liquid crystal composition is applied to the 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 satisfy the condition that at least one H of the group is substituted with any one of the atoms F, Cl, Br, and I.

[0068] R 11 and R 12 If at least one of 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, then at least one H of R 11 and R 12 is substituted with any one of the atoms F, Cl, Br, and 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. Preferably, R 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 12When each is independently selected from unsubstituted alkyl groups, the unsubstituted alkyl group can be an unsubstituted straight-chain alkyl group or an unsubstituted branched alkyl group, preferably an unsubstituted straight-chain alkyl group, R 11 and R 12 When each is independently selected from unsubstituted straight-chain alkyl groups having 1 to 7 carbon atoms, it 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 When each is independently selected from unsubstituted alkenyl groups, the unsubstituted alkenyl group can be an unsubstituted straight-chain alkenyl group or an unsubstituted branched alkenyl group, and the alkenyl group can be isomers of E configuration and Z configuration, and has at least one carbon-carbon double bond. For example, it can be selected from unsubstituted straight-chain alkenyl groups 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-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, a hept-6-enyl group, etc.

[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 can 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 can 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 can 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 can 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 can 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 can be 8%, 10%, 12%, 15%, 18%, 20%, 25%, 28%, etc. 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 can 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 can 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 can 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 can be 8%, 10%, 12%, 15%, 18%, 20%, etc. 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 can 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 can be 3%, 5%, 8%, 10%, 11%, 12%, 14%, etc.

[0076] Even 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 can 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 can be 6%, 8%, 10%, 12%, 15%, 18%, etc. 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 can 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 can be 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, etc.

[0077] In some embodiments, when the liquid crystal composition further contains 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, it may be 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, it may be 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, it may be 6%, 8%, 10%, 12%, etc.

[0078] In some embodiments, when the liquid crystal composition further contains 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, it may be 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, it may be 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, it may be 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, and can be, 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, and can be, 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, and can be, 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, and can be, 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 0.09 or more, and the optical anisotropy value of the liquid crystal composition at 25 °C is 0.22 or less, and can be, for example, 0.1, 0.105, 0.11, 0.115, 0.12, 0.125, 0.15, 0.175, 0.2, 0.21, etc., to keep 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. For example, it is 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. By setting the rotational viscosity of the liquid crystal composition within an appropriate range, the rotational speed of the liquid crystal composition is improved, ensuring that the response time of the liquid crystal composition is within an appropriate range, and avoiding the rotational viscosity of the liquid crystal composition from affecting the performance of the liquid crystal composition.

[0082] In some embodiments, the flexural elastic modulus of the liquid crystal composition is 10 or more, and the flexural elastic modulus of the liquid crystal composition is 26 or less. For example, it is 11, 12, 13, 14, 15, 18, 20, 22, 24, 25, etc. And / or, the splay elastic modulus of the liquid crystal composition is 10 or more, and the splay elastic modulus of the liquid crystal composition is 26 or less. For example, it is 12, 13, 14, 15, 18, 20, 22, 24, 25, etc. When the flexural elastic modulus of the liquid crystal composition and / or the splay elastic modulus of the liquid crystal composition are within the above ranges, it is advantageous for the liquid crystal composition to obtain an appropriate average value of the elastic modulus, and effectively improve 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, it is -4.8, -4.5, -4, -3.5, -3, -2, -1, etc. This is advantageous for reducing the driving voltage required for driving the liquid crystal composition, thereby reducing the driving voltage of the liquid crystal display panel to which the liquid crystal composition is applied and reducing the power consumption of the 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 the reduction of the high temperature resistance performance of the liquid crystal composition due to the too low clearing point of the liquid crystal composition, the clearing point of the liquid crystal composition can 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 manufacturing method of the liquid crystal composition provided by the present invention is as follows.

[0086] The manufacturing method of the liquid crystal composition includes S100 to S300.

[0087] S100: First, weigh and mix the first compound, the second compound, the third compound, and the fourth compound in mass percentage in sequence to obtain a first mixture.

[0088] The first sequence preferably means weighing and mixing the first compound, the second compound, the third compound, and the fourth compound in sequence in ascending order of their melting points.

[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 sequence to form the first mixture.

[0090] S200: Stir the first mixture at a first heating temperature to sufficiently 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, at least one of the fifth compound, the sixth compound, and the seventh compound is sufficiently mixed with the first compound, the second compound, the third compound, and the fourth compound.

[0093] S300: Cool the first mixture to room temperature and package it to obtain the liquid crystal composition.

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

[0095] (Example 1) The structural formulas and mass fractions of the compounds in the liquid crystal composition selected in this example are shown in Table 1.

[0096]

Table 1

[0097] The liquid crystal composition obtained in Example 1 has performance parameters of Tni: 82 °C, γ 1 : 64 mPa·s, Δn: 0.105, ne: 1.582, Δε: -4.3, ε ⊥ : 8.0, K 11 : 13.2, K 33 : 15.3, and no crystals precipitated even after the liquid crystal composition was left standing at -20 °C for 480 h. Here, Tni represents the clearing point of the liquid crystal composition, γ 1 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 extraordinary light of the liquid crystal composition, Δε represents the dielectric anisotropy value of the liquid crystal composition at 25 °C, ε ⊥ represents the dielectric constant value of the liquid crystal composition in the direction perpendicular to the long axis of the liquid crystal molecules, K 11 represents the bend elastic modulus of the liquid crystal composition, K 33 represents the splay elastic modulus of the liquid crystal composition.

[0098] (Example 2) The structural formulas and mass fractions of the respective compounds in the liquid crystal composition selected in this example are shown in Table 2.

[0099] [Table 2]

[0100] The liquid crystal composition obtained in Example 2 has performance parameters of Tni: 83 °C, γ 1 : 68 mPa·s, Δn: 0.098, ne: 1.565, Δε: -4.0, ε ⊥ : 7.8, K 11 : 14.5, K 33 : 14.7, and no crystals precipitated even when the liquid crystal composition was left standing at -20 °C for 480 h.

[0101] (Example 3) The structural formulas and mass fractions of the respective compounds in the liquid crystal composition selected in this example are shown in Table 3.

[0102] [Table 3]

[0103] The liquid crystal composition obtained in Example 3 has performance parameters of Tni: 77 °C, γ 1 : 70 mPa·s, Δn: 0.121, ne: 1.633, Δε: -2.4, ε ⊥ : 6.3, K 11 : 14.5, K 33 : 19.6, and no crystals precipitated even when the liquid crystal composition was left standing at -20 °C for 480 h.

[0104] (Example 4) The structural formulas and mass fractions of the respective compounds in the liquid crystal composition selected in this example are shown in Table 4.

[0105] [Table 4]

[0106] The liquid crystal composition obtained in Example 4 has performance parameters of Tni: 80 °C, γ 1 : 79 mPa·s, Δn: 0.111, ne: 1.591, Δε: -4.7, ε ⊥ : 8.5, K 11 : 13.5, K 33 : 16.6, and no crystals precipitated even when the liquid crystal composition was left standing at -20 °C for 480 h.

[0107] (Example 5) The structural formulas and mass fractions of the respective compounds in the liquid crystal composition selected in this example are shown in Table 5.

[0108]

Table 5

[0109] The liquid crystal composition obtained in Example 5 has performance parameters of Tni: 80 °C, γ 1 : 56 mPa·s, Δn: 0.107, ne: 1.586, Δε: -3.6, ε ⊥ : 7.3, K 11 : 13.1, K 33 : 14.7, and no crystals precipitated even when the liquid crystal composition was left standing at -20 °C for 480 h.

[0110] (Comparative Example 1) The structural formulas and mass fractions of the respective compounds in the liquid crystal composition selected in this comparative example are shown in Table 6.

[0111]

Table 6

[0112] The liquid crystal composition obtained in Comparative Example 1 has performance parameters of Tni: 78 °C, γ 1 : 62 mPa·s, Δn: 0.106, ne: 1.580, Δε: -3.3, ε ⊥ : 6.7, K 11 : 14.2, K 33 : 15.4, and no crystals precipitated even when the liquid crystal composition was left standing at -20 °C for 480 h.

[0113] (Comparative Example 2) The structural formulas and mass fractions of the respective compounds in the liquid crystal composition selected in this comparative example are shown in Table 7.

[0114]

Table 7

[0115] The liquid crystal composition obtained in Comparative Example 2 had performance parameters of Tni: 74 °C, γ 1 : 75 mPa·s, Δn: 0.104, ne: 1.578, Δε: -3.6, ε ⊥ : 7.6, K 11 : 12.3, K 33 : 13.7, and no crystals precipitated even when the liquid crystal composition was left standing at -20 °C for 480 h.

[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, endowing the liquid crystal composition with good high-temperature resistance performance. The rotational viscosity at 25°C is all between 56 mPa·s and 79 mPa·s, endowing the liquid crystal composition with a good rotational speed, which is beneficial for shortening the response time of the liquid crystal composition. The optical anisotropy value at 25°C is between 0.098 and 0.121, endowing the liquid crystal composition with good light transmittance. The dielectric anisotropy value at 25°C is between -4.7 and -2.4, which is beneficial for driving the liquid crystal composition at a low driving voltage, thereby reducing the power consumption of the display panel to which the liquid crystal composition is applied. The bending elastic modulus of the liquid crystal composition is between 13.1 and 14.5, and the splay elastic modulus is between 14.7 and 19.6, which is beneficial for improving the average value of the elastic modulus of the liquid crystal composition, and effectively shortening the response time of the display panel when the liquid crystal composition is applied to the display panel. Compared with Comparative Example 1, Example 5 adds the fourth compound represented by the general formula (IV) to the liquid crystal composition, effectively reducing the viscosity of the liquid crystal composition in Example 5 and reducing the ratio of viscosity to bending elastic 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 the display panel. Compared with Comparative Example 2, Example 4 adds the fourth compound represented by the general formula (IV) to the liquid crystal composition, effectively reducing the ratio of viscosity to bending elastic 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 the display panel.

[0117] Referring to FIG. 2, the embodiment of the present invention further provides a display panel 100, which includes a first substrate 101, a second substrate 102 located on the first substrate 101, and a liquid crystal layer 103 located between the first substrate 101 and the second substrate 102. Here, the liquid crystal layer 103 includes the aforementioned liquid crystal composition.

[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 includes 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. The pixel electrode layer includes a pixel electrode electrically connected to the source or the drain. The common electrode layer includes a common electrode. The common electrode layer may be disposed on the first substrate 101, and the common electrode layer is located between the pixel electrode layer and the source-drain layer, or the common electrode layer is located on a side of the pixel electrode layer away from the first substrate. The common electrode layer may be disposed on the second substrate 102 including the second substrate, and the common electrode layer is located on a side of the second substrate close to the liquid crystal layer. The display panel further includes a color filter layer that may be disposed on a side of the first substrate close to the liquid crystal layer or on a side of the second substrate close 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-Ilane Iwitching).

[0120] The present invention improves the performance of the liquid crystal composition in terms of the 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 the display panel to which the liquid crystal composition is applied.

[0121] Embodiments of the present invention disclose a liquid crystal composition and a display panel. The liquid crystal composition includes at least one first compound having a structure represented by general formula (I-A) or general formula (I-B), 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] As described above, the liquid crystal composition and the display panel provided in the embodiments of the present invention have been described in detail. In this specification, the principles and embodiments of the present invention have been described using specific examples. The description of the above embodiments is only for helping to understand the method and the core idea of the present invention. Also, those skilled in the art can make changes to the specific embodiments and application scopes based on the idea of the present invention. As described above, this specification should not be understood as limiting the present invention.

Claims

**Claim 1** A liquid crystal composition, comprising at least one first compound having a structure represented by general formula (I-A) or general formula (I-B), 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). 【Chemical 1】 [Chemical Formula 2] [Chemical Formula 3] [Chemical Formula 4] 【Chemical Formula 5】 【Chemical Formula 6】 【Chemical Formula 7】 (In the formula, X is selected from O or S, n is selected from integers of 0 or more and 7 or less, R １ , R ２ , R ３ , R ４ are each independently selected from the group consisting of H, F, Cl, Br, I, CN, SCN, NCS, 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.). **Claim 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 The end groups are each independently mono-substituted with CN or CF ３ and One or more of the bases -CH ２ - is, independently of one another, -O-, -S-, -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 -, -CF=CH-, -CH=CF-, -CF=CF-, -CH=CH- or -C≡C-, and the heteroatoms directly bonded to C are not directly bonded to one another, and satisfy at least one of the above conditions that at least one H in the group is substituted with any one of the atoms F, Cl, Br, and I. The liquid crystal composition according to claim 1, characterized in that **Claim 3** The liquid crystal composition according to claim 1, further comprising at least one fifth compound having a structure represented by general formula (V). 【Chemical 8】 (wherein, 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, and H in R ５ and R ６ is unsubstituted or at least one H is substituted with an atom of any one of F, Cl, Br, and I.) **Claim 4** 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. The liquid crystal composition according to claim 3, characterized in that **Claim 5** The liquid crystal composition according to claim 1, further comprising at least one sixth compound having a structure represented by general formula (VI). 【Chemical Formula 9】 (wherein R ７ , R ８ are each independently 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, or a substituted or unsubstituted alkynyloxy group having 2 to 10 carbon atoms, and H in R ７ and R ８ is unsubstituted or at least one H is substituted with an atom of any one of F, Cl, Br, and I.) **Claim 6** 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. The liquid crystal composition according to claim 5, characterized in that **Claim 7** The liquid crystal composition according to claim 1, further comprising at least one seventh compound having a structure represented by general formula (VII). 【Chemical 10】 (wherein, 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, and H in R ９ and R １０ is unsubstituted or at least one H is substituted with any one of atoms of F, Cl, Br, and I.) **Claim 8** 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. The liquid crystal composition according to claim 7, characterized in that **Claim 9** 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. 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. 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. 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. The liquid crystal composition according to any one of claims 1 to 8, characterized in that.

10. A display panel including a first substrate, a second substrate located on the first substrate, and a liquid crystal layer located between the first substrate and the second substrate. Here, the liquid crystal layer includes the liquid crystal composition according to any one of claims 1 to 8. A display panel characterized by this.

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