Liquid crystal composition and display panel

Abstract

To provide a liquid crystal composition that improves the performance of the liquid crystal composition in terms of clearing point, elastic modulus, and the like, thereby improving the contrast ratio and product quality of display panels with the liquid crystal composition applied.SOLUTION: There is provided a liquid crystal composition including at least one first compound represented by formula (I), wherein, m and n are each independently selected from 0, 1, 2 and 3, and the sum of m and n is 1 or more; ring A is selected from the group consisting of rings represented in the figure; ring B's are each independently cyclohexene, cyclohexenylene, phenylene, and the like; Z's are each independently a single bond, -O-, -C(O)O-, and the like; R1 and R2 are each independently H, F, Cl, Br, or C1 to C15 alkyl group, or the like.SELECTED DRAWING: Figure 1

Description

[Technical field]

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

[0002] A liquid crystal display panel applies a voltage to the liquid crystal layer to adjust and control the optical properties of the materials in the liquid crystal layer, thereby realizing the display function of the liquid crystal display panel. The physical properties (e.g., viscosity, clearing point, dielectric anisotropy, optical anisotropy, elastic coefficient, etc.) of the liquid crystal material in the liquid crystal layer affect the display effect and product quality of the liquid crystal display panel. At present, there is still room for improvement in the performance of materials applied to the liquid crystal layer, which makes it difficult to improve the display effect and product quality of the display panel.

[0003] Therefore, there is a need 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 solve the technical problem that the material performance in the current liquid crystal layer has room for improvement, making it difficult to improve the display effect and product quality of the display panel. [Means for solving the problem]

[0005] The present invention provides a liquid crystal composition comprising at least one first compound represented by general formula (I). [ka] (wherein m and n are each independently selected from the group consisting of 0, 1, 2, and 3, and the sum of m and n is 1 or greater; [ka] Each occurrence of [ka] is selected from the group consisting of [ka] Each occurrence of [ka] is selected from the group consisting of [ka] At least one H in the formula is replaced with one of F, Cl, Br, I, or H; Z is independently selected from the group consisting of a single bond, -O-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CF2CF2-, -CHO-, -OCH2-, -CH=CH- and -C≡C-, and when any one Z is selected from the group consisting of a group having H, H in any one Z is not substituted or at least one H is substituted with any one atom of F, Cl, Br and I; R1 and R2 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 terminal groups of R1 and R2 are each independently mono-substituted with H, CN or CF3, and / or one or more -CH2- in R1 and R2 are each independently substituted with -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 H in R1 and R2 is not substituted, or at least one H is substituted with any one of F, Cl, Br, and I atoms.

[0007] Preferably, the first compound has a structure represented by at least one of general formulas I-1 to I-37. [ka] [ka]

[0008] Preferably, [ka] Each occurrence of [ka] is selected from the group consisting of:

[0009] Preferably, the first compound has a structure represented by at least one of general formulas IA-1 to IA-67. [ka] [ka]

[0010] Preferably, R1 and R2 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, and an unsubstituted alkenyl group having 2 to 7 carbon atoms.

[0011] Preferably, the liquid crystal composition further contains at least one second compound, and the second compound has a structure represented by at least one of general formulas II-1 to II-9. [ka] (wherein R3 and R4 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 R3 and R4 is not substituted or at least one H is substituted with any one atom of F, Cl, Br, and I.)

[0012] Preferably, the liquid crystal composition further contains at least one third compound, and the third compound has a structure represented by at least one of general formulas III-1 to III-5. [ka] Here, 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 atom or group of F, Cl, Br, I, CH3, or CN.

[0013] Preferably, in the liquid crystal composition, the mass fraction of the first compound is 1% or more, and the mass fraction of the second compound is 70% or less; In the liquid crystal composition, the mass fraction of the second compound is 10% or more, and the mass fraction of the second compound is 70% or less; In the liquid crystal composition, the mass fraction of the third compound is 10% or more, and the mass fraction of the third compound is 70% or less.

[0014] The present invention relates to a liquid crystal display device comprising 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, The liquid crystal layer includes the liquid crystal composition described above, thereby providing a display panel. Effect of the Invention

[0015] The present invention improves the performance of a liquid crystal composition in terms of clearing point, elastic coefficient, etc., by adding a first compound to the liquid crystal composition, thereby improving the contrast ratio and product quality 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 drawings necessary to be used in the description of the embodiments are briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any 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 structural schematic diagram of a display panel provided in an embodiment of the present application. 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. Obviously, the described embodiments are only a part 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 that a person skilled in the art can devise without making creative efforts are within the scope of protection of the present invention. 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, unless otherwise stated, the directional terms used, such as "up" and "down", generally refer to the up and down of the device in its actual use or operating state, specifically the drawing direction in the drawings, while "inside" and "outside" refer to the contour of the device.

[0018] At present, there is a problem that the performance of the materials for the liquid crystal layer has room for improvement, which makes it difficult to improve the display effect and product quality of the liquid crystal display panel.

[0019] An embodiment of the present invention provides a liquid crystal composition comprising at least one first compound represented by general formula (I). [ka] (wherein m and n are each independently selected from the group consisting of 0, 1, 2, and 3, and the sum of m and n is 1 or greater; [ka] Each occurrence of [ka] is selected from the group consisting of [ka] Each occurrence of [ka] is selected from the group consisting of [ka] At least one H in the formula is replaced with one of F, Cl, Br, I, or H; Z is independently selected from the group consisting of a single bond, -O-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CF2CF2-, -CHO-, -OCH2-, -CH=CH- and -C≡C-, and when any one Z is selected from the group consisting of a group having H, H in any one Z is not substituted or at least one H is substituted with any one atom of F, Cl, Br and I; R1 and R2 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 addition of the first compound is advantageous to increase the clearing point and the average value of the elastic coefficient of the liquid crystal composition, and can effectively improve the problem of light leakage in the dark state of a display panel when the liquid crystal composition is applied to a display surface, thereby improving the contrast ratio of the display panel and the product quality of the display panel when the liquid crystal composition is applied to a display surface.

[0021] In an embodiment of the present invention, the performance of the liquid crystal composition is improved in terms of clearing point, elastic modulus, etc. by adding a first compound to the liquid crystal composition, thereby improving the contrast ratio and product quality of a display panel to which the liquid crystal composition is applied.

[0022] In this embodiment, [ka] In each optional group, "-" represents the attachment site.

[0023] In some embodiments, the terminal groups of R1 and R2 are each independently mono-substituted with H, CN, or CF3.

[0024] In some embodiments, one or more -CH2- in R1 and R2 are each independently replaced with -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 joined to each other. H in R1 and R2 is not substituted, or at least one H is substituted with any one atom of F, Cl, Br, or I, i.e., H in R1 is not substituted, or at least one H is substituted with any one atom of F, Cl, Br, or I, and H in R2 is not substituted, or at least one H is substituted with any one atom of F, Cl, Br, or I.

[0025] In some embodiments, R1 and R2 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.

[0026] Preferably, R1 and R2 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.

[0027] More preferably, R1 and R2 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.

[0028] In some embodiments, when R1 and R2 are each independently selected from the group consisting of an unsubstituted alkyl group, an unsubstituted alkenyl group, and an unsubstituted alkynyl group, the unsubstituted alkyl group, the unsubstituted alkenyl group, and the unsubstituted alkynyl group are aliphatic hydrocarbon groups.

[0029] In some embodiments, when R1 and R2 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 and R2 are each independently selected from an unsubstituted linear alkyl group having 1 to 7 carbon atoms, the unsubstituted alkyl group may be selected from the group consisting of methyl, ethyl, propyl, butyl, pentyl, hexyl, and heptyl.

[0030] When R1 and R2 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 be selected from an unsubstituted linear alkenyl group having at least one carbon-carbon double bond and having 2 to 7 carbon atoms, more preferably vinyl, prop-1-enyl ... -2-enyl, but-1-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, hept-6-enyl, and the like.

[0031] When R1 and R2 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 be selected from an unsubstituted linear alkynyl group having at least one carbon-carbon triple bond and having 2 to 7 carbon atoms, more preferably ethynyl, prop-1-ynyl, prop-2-ynyl, but-1-ynyl, but-2-ynyl, but-3-ynyl, pent-1-ynyl, pent-2-ynyl, pent-3-ynyl, pent-4-ynyl, pent-5-ynyl, pent-6-ynyl, pent-7-ynyl, pent-8-ynyl, pent-9-ynyl, pent-10-ynyl, pent-11-ynyl, pent-12-ynyl, pent-13-ynyl, pent-14-ynyl, pent-15-ynyl, pent-16-ynyl, pent-17-ynyl, pent-18-ynyl, pent-19-ynyl, pent-20-ynyl, pent-21-ynyl, pent-22-ynyl, pent-23-ynyl, pent-24-ynyl, pent-25-ynyl, pent-26-ynyl, pent-27-ynyl, pent-28-ynyl, pent-29 ... and the like, and more preferably prop-2-ynyl, but-2-ynyl, but-3-ynyl, pent-2-ynyl, pent-3-ynyl, or pent-4-ynyl.

[0032] In some embodiments, the sum of m and n is greater than or equal to 1 and less than or equal to 3, which is advantageous for increasing the number of rigid rings in the first compound, thereby increasing the clearing point and the average elastic coefficient of the liquid crystal composition, and further effectively improving the problem of light leakage in the dark state of the display panel when the liquid crystal composition is applied to a display surface, thereby improving the contrast ratio of the display panel and the product quality of the display panel when the liquid crystal composition is applied to a display surface.

[0033] In some embodiments, the first compound has a structure represented by at least one of formulas I-1 to I-37. [ka] [ka]

[0034] Preferably, [ka] Each occurrence of [ka] Preferably, the compound is selected from the group consisting of: [ka] Each occurrence of, independently, [ka] is selected from the group consisting of:

[0035] In some embodiments, the first compound has a structure represented by at least one of formulas IA-1 to IA-67. [ka] [ka]

[0036] In some embodiments, the liquid crystal composition further comprises at least one second compound, and the second compound has a structure represented by at least one of general formulas II-1 to II-9. [ka] Here, R3 and R4 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. H in R3 and R4 is not substituted, or at least one H is substituted with any one atom of F, Cl, Br, or I, i.e., H in R3 is not substituted, or at least one H is substituted with any one atom of F, Cl, Br, or I, and H in R4 is not substituted, or at least one H is substituted with any one atom of F, Cl, Br, or I.

[0037] The second compound is a dielectrically neutral compound, and adjusts the viscosity, clearing point, dielectric anisotropy, optical anisotropy, elastic coefficient, etc. of the liquid crystal composition comprehensively to apply the liquid crystal composition to a display panel.

[0038] In some embodiments, R3 and R4 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, R3 and R4 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.

[0039] More preferably, R3 and R4 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.

[0040] In some embodiments, when 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 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 the group consisting of methyl, ethyl, propyl, butyl, pentyl, hexyl, and heptyl.

[0041] When 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 and Z-configuration, and may be selected from an unsubstituted linear alkenyl group having at least one carbon-carbon double bond and having 2 to 7 carbon atoms, more preferably vinyl, prop-1-enyl ... -2-enyl, but-1-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, hept-6-enyl, and the like.

[0042] In some embodiments, the liquid crystal composition further comprises at least one third compound, and the third compound has a structure represented by at least one of general formulas III-1 to III-5. [ka] Here, 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. H in R5 and R6 is not substituted, or at least one H is substituted with any one atom or group of F, Cl, Br, I, CH3, or CN, i.e., H in R5 is not substituted, or at least one H is substituted with any one atom or group of F, Cl, Br, I, CH3, or CN, and H in R6 is not substituted, or at least one H is substituted with any one atom or group of F, Cl, Br, I, CH3, or CN.

[0043] The third compound is a negative dielectric compound, and the negative dielectric compound and the neutral dielectric compound of the liquid crystal composition are mixed in a certain ratio to comprehensively adjust the viscosity, clearing point, dielectric anisotropy, optical anisotropy, elastic coefficient, etc. of the liquid crystal composition for application to a display panel.

[0044] 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.

[0045] 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.

[0046] 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, and when R5 and R6 are each independently selected from an unsubstituted linear alkyl group having 1 to 7 carbon atoms, the unsubstituted alkyl group may be selected from the group consisting of a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, a hexyl group, and a heptyl group.

[0047] 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 be selected from an unsubstituted linear alkenyl group having at least one carbon-carbon double bond and having 2 to 7 carbon atoms, more preferably vinyl, prop-1-enyl ... -2-enyl, but-1-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, hept-6-enyl, and the like.

[0048] In some embodiments, in the liquid crystal composition, the mass fraction of the first compound is 1% or more and the mass fraction of the first compound is 70% or less, for example, the mass fraction of the first compound may be 5%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, etc., and in the liquid crystal composition, the mass fraction of the second compound is 10% or more and the mass fraction of the second compound is 70% or less, for example, The mass fraction of the second compound may be 5%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, etc., and in the liquid crystal composition, the mass fraction of the third compound is 10% or more and the mass fraction of the third compound is 70% or less, for example, the mass fraction of the third compound may be 5%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, etc.

[0049] Preferably, in the liquid crystal composition, the mass fraction of the first compound is 1% or more and the mass fraction of the first compound is 50% or less. For example, the mass fraction of the first compound may be 5%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, etc.; in the liquid crystal composition, the mass fraction of the second compound is 10% or more and the mass fraction of the second compound is 60% or less. For example, the mass fraction of the second compound may be 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, etc.; in the liquid crystal composition, the mass fraction of the third compound is 10% or more and the mass fraction of the third compound is 50% or less. For example, the mass fraction of the third compound may be 15%, 20%, 25%, 30%, 35%, 40%, 45%, etc.

[0050] More preferably, in the liquid crystal composition, the mass fraction of the first compound is 1% or more and the mass fraction of the first compound is 40% or less. For example, the mass fraction of the first compound may be 5%, 10%, 15%, 20%, 25%, 30%, 35%, etc.; in the liquid crystal composition, the mass fraction of the second compound is 10% or more and the mass fraction of the second compound is 50% or less. For example, the mass fraction of the second compound may be 15%, 20%, 25%, 30%, 35%, 40%, 45%, etc.; and in the liquid crystal composition, the mass fraction of the third compound is 10% or more and the mass fraction of the third compound is 50% or less. For example, the mass fraction of the third compound may be 15%, 20%, 25%, 30%, 35%, 40%, 45%, etc.

[0051] In some embodiments, the birefringence difference of the liquid crystal composition at 25°C is 0.1 or more, and the birefringence difference of the liquid crystal composition at 25°C is 0.22 or less, for example, 0.105, 0.11, 0.115, 0.12, 0.125, 0.15, 0.175, 0.2, 0.21, etc., to make the birefringence difference of the liquid crystal composition within an appropriate range, to increase the light transmittance of the liquid crystal composition, to ensure that the light transmittance of the liquid crystal composition is within an appropriate range, and to avoid the influence of the birefringence difference of the liquid crystal composition on the optical performance of the liquid crystal composition.

[0052] In some embodiments, the rotational viscosity of the liquid crystal composition at 25° C. is 100 mPa·s or more, and the rotational viscosity of the liquid crystal composition at 25° C. is 200 mPa·s or less, e.g., 110 mPa·s, 115 mPa·s, 120 mPa·s, 130 mPa·s, 140 mPa·s, 150 mPa·s, 160 mPa·s, 170 mPa·s, 180 mPa·s, 190 mPa·s, etc., so as to make the rotational viscosity of the liquid crystal composition within an appropriate range, increase the rotational speed of the liquid crystal composition, ensure the response time of the liquid crystal composition within an appropriate range, and avoid the influence of the rotational viscosity of the liquid crystal composition on the performance of the liquid crystal composition.

[0053] In some embodiments, the bending elastic coefficient of the liquid crystal composition is 10 or more, and the bending elastic coefficient of the liquid crystal composition is 26 or less, e.g., 11, 12, 13, 14, 15, 18, 20, 22, 24, 25, etc., and / or the splay-bend elastic coefficient of the liquid crystal composition is 10 or more, and the splay-bend elastic coefficient of the liquid crystal composition is 26 or less, e.g., 12, 13, 14, 15, 18, 20, 22, 24, 25, etc., and setting the bending elastic coefficient of the liquid crystal composition and / or the splay-bend elastic coefficient of the liquid crystal composition within the above ranges is advantageous for the liquid crystal composition to obtain an appropriate average elastic coefficient, and effectively improves the problem of light leakage in the dark state of a display panel when the liquid crystal composition is applied to a display surface.

[0054] In some embodiments, the dielectric anisotropy value of the liquid crystal composition at 25°C is -10 or more, and the dielectric anisotropy value of the liquid crystal composition at 25°C is -1 or less, for example, -8, -6, -5, -4.2, -4.1, -4, -3.8, -3.7, -3.4, -3.2, -3, -2, -1.5, 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.

[0055] In some embodiments, the clearing point of the liquid crystal composition is preferably 60°C to 135°C. For example, the clearing point of the liquid crystal composition may be 62°C, 65°C, 68°C, 70°C, 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., thereby avoiding a decrease in high temperature resistance of the liquid crystal composition due to the clearing point of the liquid crystal composition being too low.

[0056] With reference to FIG. 1, an exemplary method for producing the liquid crystal composition provided in the present invention is as follows.

[0057] The method for producing the liquid crystal composition includes steps S100 to S300.

[0058] In S100, the first compound, the second compound, and the third compound are weighed and mixed in a first order by mass percent to obtain a first mixture.

[0059] The first order is preferably such that the first compound, the second compound, and the third compound are weighed and mixed in order of decreasing melting point.

[0060] In S200, the first mixture is stirred at a first heating temperature to thoroughly mix the first compound, the second compound, and the third compound in the first mixture.

[0061] The first heating temperature is preferably 60°C to 100°C.

[0062] In S300, the first mixture is cooled to room temperature and sealed and packaged to obtain the liquid crystal composition.

[0063] Exemplary composition forms of the liquid crystal composition of the present invention are as shown in Examples 1 to 5 below.

[0064] Example 1 Table 1 shows the structural formula and mass fraction of each compound in the liquid crystal composition selected in this example. [Table 1] TIFF2025056687000034.tif129170

[0065] The liquid crystal composition obtained in Example 1 had the following performance parameters: Tni: 77°C, γ1: 133 mPa·s, Δn: 0.1120, ne: 1.642, Δε: -2.4, ε ⊥ :5.3,K 11 :17.3,K 33The liquid crystal composition was left at -20°C for 480 hours, and no crystal precipitation occurred. 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 difference in birefringence of the liquid crystal composition at 25°C and represents the optical anisotropy of the liquid crystal composition, 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 molecules, and K 11 is the bending elastic constant of the liquid crystal composition, K 33 represents the splay-bend elastic coefficient of the liquid crystal composition.

[0066] Example 2 Table 2 shows the structural formula and mass fraction of each compound in the liquid crystal composition selected in this example. [Table 2] TIFF2025056687000036.tif160170

[0067] The liquid crystal composition obtained in Example 2 had the following performance parameters: Tni: 101°C, γ1: 146 mPa·s, Δn: 0.137, ne: 1.782, Δε: -2.0, ε ⊥ :4.8,K 11 :25.9, K 33 The liquid crystal composition was left at -20°C for 480 hours, and no crystal precipitation was observed.

[0068] Example 3 Table 3 shows the structural formula and mass fraction of each compound in the liquid crystal composition selected in this example. [Table 3] TIFF2025056687000038.tif179170

[0069] The liquid crystal composition obtained in Example 3 had the following performance parameters: Tni: 76°C, γ1: 153 mPa·s, Δn: 0.1043, ne: 1.5832, Δε: -3.1, ε ⊥ :6.2,K 11 :14.5,K 33 21.6, the liquid crystal composition was left at -20°C for 480 hours, and no crystal precipitation was observed.

[0070] Example 4 Table 4 shows the structural formula and mass fraction of each compound in the liquid crystal composition selected in this example. [Table 4] TIFF2025056687000040.tif205170

[0071] The liquid crystal composition obtained in Example 4 had the following performance parameters: Tni: 105°C, γ1: 169 mPa·s, Δn: 0.1108, ne: 1.650, Δε: -3.2, ε ⊥ :6.6,K 11 :18.7,K 33 The liquid crystal composition was left at -20°C for 480 hours, and no crystal precipitation was observed.

[0072] Example 5 Table 5 shows the structural formula and mass fraction of each compound in the liquid crystal composition selected in this example. [Table 5] TIFF2025056687000042.tif151170

[0073] The liquid crystal composition obtained in Example 5 had the following performance parameters: Tni: 77°C, γ1: 104 mPa·s, Δn: 0.1141, ne: 1.685, Δε: -3.4, ε ⊥ :7.0,K 11 :15.8,K 33 : 19.6, the liquid crystal composition was left at -20°C for 480 hours, and no crystal precipitation was observed.

[0074] [Table 6] TIFF2025056687000044.tif20170

[0075] The liquid crystal composition obtained in Comparative Example 1 had the following performance parameters: Tni: 95°C, γ1: 145 mPa·s, Δn: 0.1062, ne: 1.593, Δε: -3.0, ε ⊥ :6.1,K 11 :16.8,K 33 19.2, the liquid crystal composition was left at -20°C for 480 hours, and no crystal precipitation was observed.

[0076] The five sets of liquid crystal compositions provided in the above Examples 1 to 5 all have a clearing point between 76°C and 105°C, which allows the liquid crystal composition to have good high temperature resistance; they all have a rotational viscosity at 25°C between 104mPa·s and 169mPa·s, which allows the liquid crystal composition to have good rotation speed and is favorable for shortening the response time of the liquid crystal composition; they have a birefringence difference at 25°C between 0.1043 and 0.137, which allows the liquid crystal composition to have good light transmittance; their dielectric anisotropy values ​​at 25°C between -3.4 and -2, which are favorable for driving the liquid crystal composition at a low driving voltage and thereby reducing the power consumption of a display panel to which the liquid crystal composition is applied; the bending elastic coefficients of the liquid crystal compositions are between 14.5 and 25.9, and the splay-bend elastic coefficients are between 19.6 and 23.9, which are favorable for improving the average elastic coefficients of the liquid crystal compositions; and when the liquid crystal compositions are applied to a display surface, the problem of light leakage in the dark state of the display panel is effectively improved. Referring to Example 4 and Comparative Example 1, compared with Comparative Example 1, Example 4 effectively improves the clearing point, bending elastic modulus and splay-bend elastic modulus of the liquid crystal composition by adding the first compound, thereby improving the performance of the liquid crystal composition in terms of clearing point, elastic modulus, etc., which is advantageous in improving the contrast ratio and product quality of a display panel to which the liquid crystal composition is applied.

[0077] 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. Among them, the liquid crystal layer 103 includes the liquid crystal composition described above.

[0078] The first substrate 101 may be an array substrate, and the second substrate 102 may be a color film 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 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, the pixel electrode layer includes a pixel electrode, and the pixel electrode is electrically connected to the source or the drain. The common electrode layer may include a common electrode, and the common electrode layer may be provided 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 provided on the second substrate 102, and the second substrate 102 includes 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 may further include a color film layer, and the color film layer may be provided 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.

[0079] 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).

[0080] The display panel provided by the present invention improves the performance of the liquid crystal composition in terms of clearing point, elastic coefficient, etc. by adding a first compound as represented by general formula (I) to the liquid crystal composition used in the liquid crystal layer, thereby improving the contrast ratio and product quality of the display panel to which the liquid crystal composition is applied.

[0081] The embodiments of the present invention disclose a liquid crystal composition and a display panel, the liquid crystal composition comprises at least one first compound represented by general formula (I), and the present invention improves the performance of the liquid crystal composition in terms of clearing point, elastic coefficient, etc., by adding the first compound to the liquid crystal composition, thereby improving the contrast ratio and product quality of the display panel to which the liquid crystal composition is applied.

[0082] The above provides a detailed introduction of the liquid crystal composition and display panel provided in the examples of the present invention, and the present specification uses specific examples to explain the principles and embodiments of the present invention. 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 can make changes in both the specific embodiments and the scope of application based on the idea of ​​the present invention. In summary, the contents of the present specification should not be construed as limiting the present invention.

Claims

1. It comprises at least one first compound represented by general formula (I), 【Chemistry 1】 wherein m and n are each independently selected from the group consisting of 0, 1, 2, and 3, and the sum of m and n is 1 or greater; 【Chemistry 2】 Each occurrence of 【Chemistry 3】 is selected from the group consisting of 【Chemistry 4】 Each occurrence of 【Chemistry 5】 is selected from the group consisting of 【Chemistry 6】 At least one H in the formula (I) is replaced with any one atom of F, Cl, Br, I, or H; Z is independently a single bond, -O-, -C(O)O-, -OC(O)-, or -CF ２ O-, -OCF ２ --, --CH ２ CH ２ -, -CF ２ CF ２ --, --CH ２ O-, -OCH ２ -, -CH=CH-, and -C≡C-; when any one Z is selected from the group consisting of a group having H, H in any one Z is not substituted or at least one H is substituted with any one atom of F, Cl, Br, and I; R １ and R ２ 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.

2. R １ and R ２ each end group is independently H, CN or CF ３ and / or R １ and R ２ One or more -CH ２ Each - 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 substituted with -, -CF=CH-, -CH=CF-, -CF=CF-, -CH=CH- or -C≡C- and directly bonded to C are not directly bonded to each other, R １ and R ２ 2. The liquid crystal composition according to claim 1, wherein H in is not substituted or at least one H is substituted with any one atom of F, Cl, Br and I.

3. 2. The liquid crystal composition according to claim 1, wherein the first compound has a structure represented by at least one of general formulas I-1 to I-37. 【Chemistry 7(1)】 【Chemistry 7(2)】 【Request 4】 【Chemical 8】 Each occurrence of 【Chemistry 9】 The liquid crystal composition according to claim 3 , wherein the compound is selected from the group consisting of:

5. 4. The liquid crystal composition according to claim 3, wherein the first compound has a structure represented by at least one of general formulas IA-1 to IA-67. 【Chemistry 10(1)】 【Chemistry 10(2)】

6. R １ and R ２ 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, and an unsubstituted alkenyl group having 2 to 7 carbon atoms.

7. The liquid crystal composition further includes at least one second compound, and the second compound has a structure represented by at least one of general formulas II-1 to II-9, 【Chemistry 11】 Here, R ３ and R ４ 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 ３ and R ４ The liquid crystal composition according to any one of claims 1 to 6, wherein H in is not substituted, or at least one H is substituted with any one atom of F, Cl, Br, and I.

8. The liquid crystal composition further includes at least one third compound, and the third compound has a structure represented by at least one of general formulas III-1 to III-5, 【Chemistry 12】 Here, R ５ and 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 H in is not substituted or at least one H is F, Cl, Br, I, CH ３ 8. The liquid crystal composition according to claim 7, wherein said compound is substituted with any one of an atom or group selected from the group consisting of CN and CN.

9. In the liquid crystal composition, the mass fraction of the first compound is 1% or more, and the mass fraction of the second compound is 70% or less; In the liquid crystal composition, the mass fraction of the second compound is 10% or more and the mass fraction of the second compound is 70% or less; 9. The liquid crystal composition according to claim 8, wherein the mass fraction of the third compound in the liquid crystal composition is 10% or more and 70% or less.

10. 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; A display panel, wherein the liquid crystal layer contains the liquid crystal composition according to any one of claims 1 to 6.

11. 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; 8. A display panel, wherein the liquid crystal layer comprises the liquid crystal composition according to claim 7.

12. 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; 9. A display panel, wherein the liquid crystal layer comprises the liquid crystal composition according to claim 8.

13. 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; 10. A display panel, wherein the liquid crystal layer comprises the liquid crystal composition according to claim 9.

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