Liquid crystal composition and display panel

Abstract

This invention discloses a liquid crystal composition and a display panel. The liquid crystal composition includes at least two first compounds, at least one second compound, and at least one third compound. The first compound has a structure as shown in general formula (I), the second compound has a structure as shown in general formula (II), and the third compound has a structure as shown in general formula (III). The first compound includes at least two compounds as shown in formulas (I-a), (I-b), and (I-c). By including the first, second, and third compounds in the liquid crystal composition, and with the first compound having a specific structural compound, this invention improves the performance of the liquid crystal composition in terms of clearing point, viscosity, and elasticity, thereby improving the response time of the display panel using the liquid crystal composition.

Description

Technical Field

[0001] This invention relates to the field of displays, and more specifically to a liquid crystal composition and a display panel. Background Technology

[0002] Liquid crystal display (LCD) panels utilize the application of voltage to the liquid crystal layer to control the optical properties of the materials within it, thereby enabling the display function. The physical properties of the liquid crystal material (such as viscosity, clearing point, dielectric anisotropy, optical anisotropy, and elastic modulus) affect the display performance of the LCD panel, particularly in aspects like response time. Currently, the performance of materials used in liquid crystal layers still needs improvement, hindering advancements in aspects such as response time.

[0003] Therefore, there is an urgent need for a liquid crystal composition and display panel to solve the above-mentioned technical problems. Summary of the Invention

[0004] This invention provides a method to alleviate the technical problem that the response time of display panels is difficult to improve due to the need to improve the material properties in the liquid crystal layer.

[0005] This invention provides a liquid crystal composition comprising at least two first compounds, at least one second compound, and at least one third compound;

[0006] The first compound has a structure as shown in general formula (Ⅰ):

[0007]

[0008] The second compound has a structure as shown in general formula (II):

[0009]

[0010] The third compound has a structure as shown in general formula (Ⅲ):

[0011]

[0012] The first compound includes at least two of the compounds shown in formula (I-a), formula (I-b), and formula (I-c):

[0013]

[0014] X is selected from O or S;

[0015] n is selected from integers greater than or equal to 0 and less than or equal to 7;

[0016] Each time R1, R2, R3, and R4 appear, they are independently selected from H, F, Cl, Br, I, CN, SCN, NCS, SF5, substituted or unsubstituted alkyl groups having 1-15 carbon atoms, substituted or unsubstituted alkoxy groups having 1-15 carbon atoms, substituted or unsubstituted alkenyl groups having 2-15 carbon atoms, substituted or unsubstituted alkenyloxy groups having 2-15 carbon atoms, substituted or unsubstituted alkynyl groups having 2-15 carbon atoms, and substituted or unsubstituted alkynyloxy groups having 2-15 carbon atoms.

[0017] Preferably, the substituted alkyl group having 1-15 carbon atoms, the substituted alkoxy group having 1-15 carbon atoms, the substituted alkenyl group having 2-15 carbon atoms, the substituted alkenyl group having 2-15 carbon atoms, the substituted alkynyl group having 2-15 carbon atoms, and the substituted alkynyl group having 2-15 carbon atoms satisfy at least one of the following conditions:

[0018] The terminal groups are independently monosubstituted by CN or CF3;

[0019] One or more -CH2- groups are independently replaced by -O-, -S-, -SO2-, -CO-, -C(O)O-, -OC(O)-, -OC(O)O-, -CF2O-, -OCF2-, -CH2-CH2-, -(CH2)3-, -CF2-CF2-, -CF2-CH2-, -CH2-CF2-, -CHF-CHF-, -CH2O-, -OCH2-, -CF=CH-, -CH=CF-, -CF=CF-, -CH=CH- or -C≡C-, and the heteroatoms directly bonded to C are not directly bonded to each other;

[0020] At least one H in the group is replaced by any one of F, Cl, Br, or I atoms.

[0021] Preferably, when the first compound includes the compound shown in formula (I-a), the mass fraction of the compound shown in formula (I-a) in the liquid crystal composition is greater than or equal to 15%, and the mass fraction of the compound shown in formula (I-a) in the liquid crystal composition is less than or equal to 65%.

[0022] When the first compound includes the compound shown in formula (I-b), the mass fraction of the compound shown in formula (I-b) in the liquid crystal composition is greater than or equal to 2%, and the mass fraction of the compound shown in formula (I-b) in the liquid crystal composition is less than or equal to 35%.

[0023] When the first compound includes the compound shown in formula (I-c), the mass fraction of the compound shown in formula (I-c) in the liquid crystal composition is greater than or equal to 1%, and the mass fraction of the compound shown in formula (I-c) in the liquid crystal composition is less than or equal to 25%.

[0024] Preferably, when the first compound includes the compound shown in formula (I-a), the mass fraction of the compound shown in formula (I-a) in the liquid crystal composition is greater than or equal to 20%, and the mass fraction of the compound shown in formula (I-a) in the liquid crystal composition is less than or equal to 55%.

[0025] When the first compound includes the compound shown in formula (I-b), the mass fraction of the compound shown in formula (I-b) in the liquid crystal composition is greater than or equal to 5%, and the mass fraction of the compound shown in formula (I-b) in the liquid crystal composition is less than or equal to 30%.

[0026] When the first compound includes the compound shown in formula (I-c), the mass fraction of the compound shown in formula (I-c) in the liquid crystal composition is greater than or equal to 3%, and the mass fraction of the compound shown in formula (I-c) in the liquid crystal composition is less than or equal to 20%.

[0027] Preferably, the first compound further includes at least one of the following compounds:

[0028]

[0029] Preferably, the liquid crystal composition further includes at least one of the following: a fourth compound having the structure shown in general formula (IV), a fifth compound having the structure shown in general formula (V), a sixth compound having the structure shown in general formula (VI), a seventh compound having the structure shown in general formula (VII), an eighth compound having the structure shown in general formula (VIII), a ninth compound having the structure shown in general formula (IX), and a tenth compound having the structure shown in general formula (X).

[0030]

[0031] Among them, R5, R6, R7, R8, R9, R 10 R 11 R 12 R 13 R 14 R 15 R 16 R 17 R 18Each time it appears, it is independently selected from substituted or unsubstituted alkyl groups having 1-10 carbon atoms, substituted or unsubstituted alkoxy groups having 1-10 carbon atoms, substituted or unsubstituted alkenyl groups having 2-10 carbon atoms, substituted or unsubstituted alkenyloxy groups having 2-10 carbon atoms, substituted or unsubstituted alkynyl groups having 2-10 carbon atoms, and substituted or unsubstituted alkynyloxy groups having 2-10 carbon atoms.

[0032] Preferably, the mass fraction of the fourth compound in the liquid crystal composition is greater than or equal to 0%, and the mass fraction of the fourth compound in the liquid crystal composition is less than or equal to 40%.

[0033] The fifth compound has a mass fraction greater than or equal to 0% in the liquid crystal composition, and the mass fraction of the fifth compound in the liquid crystal composition is less than or equal to 15%.

[0034] The sixth compound has a mass fraction greater than or equal to 0% in the liquid crystal composition, and the mass fraction of the sixth compound in the liquid crystal composition is less than or equal to 15%.

[0035] The seventh compound has a mass fraction greater than or equal to 0% in the liquid crystal composition, and the mass fraction of the seventh compound in the liquid crystal composition is less than or equal to 35%.

[0036] The eighth compound has a mass fraction greater than or equal to 0% in the liquid crystal composition, and the eighth compound has a mass fraction less than or equal to 35% in the liquid crystal composition;

[0037] The mass fraction of the ninth compound in the liquid crystal composition is greater than or equal to 0%, and the mass fraction of the ninth compound in the liquid crystal composition is less than or equal to 35%.

[0038] The tenth compound has a mass fraction greater than or equal to 0% in the liquid crystal composition, and the mass fraction of the tenth compound in the liquid crystal composition is less than or equal to 30%.

[0039] Preferably, the liquid crystal composition further includes at least one stabilizer having the following structure:

[0040]

[0041] Among them, R 19 Each time it appears, it is independently selected from substituted or unsubstituted alkyl groups having 1 to 5 carbon atoms.

[0042] Preferably, the mass fraction of the first compound in the liquid crystal composition is greater than or equal to 15%, and the mass fraction of the first compound in the liquid crystal composition is less than or equal to 70%.

[0043] The second compound has a mass fraction of 1% or more in the liquid crystal composition, and the mass fraction of the second compound in the liquid crystal composition is less than or equal to 15%.

[0044] The third compound has a mass fraction of greater than or equal to 1% in the liquid crystal composition and a mass fraction of less than or equal to 20% in the liquid crystal composition.

[0045] The present invention also provides a display panel, 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;

[0046] The liquid crystal layer comprises the liquid crystal composition as described above.

[0047] The present invention improves the performance of the liquid crystal composition in terms of clearing point, viscosity, and elasticity by including a first compound, a second compound, and a third compound in the liquid crystal composition, wherein the first compound has a specific structural compound. This improves the response time of the display panel using the liquid crystal composition. Attached Figure Description

[0048] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0049] Figure 1 This is a flowchart of a method for preparing a liquid crystal composition according to an embodiment of the present invention;

[0050] Figure 2 This is a schematic diagram of a display panel provided in an embodiment of the present invention. Detailed Implementation

[0051] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Furthermore, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present invention and are not intended to limit the present invention. In the present invention, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0052] Currently, due to the need to improve the performance of liquid crystal layer materials, there is a problem that the response time of liquid crystal display panels is difficult to improve.

[0053] This invention provides a liquid crystal composition comprising at least two first compounds, at least one second compound, at least one third compound, and at least one fourth compound;

[0054] The first compound has a structure as shown in general formula (Ⅰ):

[0055]

[0056] The second compound has a structure as shown in general formula (II):

[0057]

[0058] The third compound has a structure as shown in general formula (Ⅲ):

[0059]

[0060] The first compound includes at least two of the compounds shown in formula (I-a), formula (I-b), and formula (I-c):

[0061]

[0062] X is selected from O or S;

[0063] n is selected from integers greater than or equal to 0 and less than or equal to 7;

[0064] Each time R1, R2, R3, and R4 appear, they are independently selected from H, F, Cl, Br, I, CN, SCN, NCS, SF5, substituted or unsubstituted alkyl groups having 1-15 carbon atoms, substituted or unsubstituted alkoxy groups having 1-15 carbon atoms, substituted or unsubstituted alkenyl groups having 2-15 carbon atoms, substituted or unsubstituted alkenyloxy groups having 2-15 carbon atoms, substituted or unsubstituted alkynyl groups having 2-15 carbon atoms, and substituted or unsubstituted alkynyloxy groups having 2-15 carbon atoms.

[0065] In the liquid crystal composition, the first compound has a low clearing point and low viscosity, which is beneficial 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. Specifically, the compounds shown in formula (I-a) and (I-b) both have extremely low viscosity and are dielectrically neutral compounds, used to reduce the viscosity of the composition, thereby improving the response speed of the display panel when the liquid crystal composition is applied to the display panel; the compound shown in formula (I-c) has low viscosity and is dielectrically neutral, used to be added to the liquid crystal composition when the addition amount of the compound shown in formula (I-a) and / or the compound shown in formula (I-b) reaches the upper limit.

[0066] In the liquid crystal composition, the second compound has a moderate viscosity, a large absolute value of dielectric anisotropy, and a large absolute value of birefringence difference. By adjusting the viscosity of the liquid crystal composition, adjusting the optical anisotropy of the liquid crystal composition, and increasing the absolute value of dielectric anisotropy, the light transmittance of the liquid crystal composition is kept within a suitable range, while 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 the liquid crystal composition, the third compound has a high clearing point, low viscosity, a large absolute value of dielectric anisotropy, and a large absolute value of birefringence difference. It is used to adjust the viscosity of the liquid crystal composition, increase the clearing point of the liquid crystal composition, and increase the absolute value of dielectric anisotropy of the liquid crystal composition, so as to improve the high temperature resistance of the liquid crystal composition and improve the response speed of the display panel when the liquid crystal composition is applied to the display panel.

[0068] The embodiments of the present invention improve the performance of the liquid crystal composition in terms of clearing point, viscosity, and elasticity by including a first compound, a second compound, and a third compound in the liquid crystal composition, wherein the first compound has a specific structural compound. This improves the response time of the display panel using the liquid crystal composition.

[0069] In some embodiments, the substituted alkyl group having 1-15 carbon atoms, the substituted alkoxy group having 1-15 carbon atoms, the substituted alkenyl group having 2-15 carbon atoms, the substituted alkenyl group having 2-15 carbon atoms, the substituted alkynyl group having 2-15 carbon atoms, and the substituted alkynyl group having 2-15 carbon atoms satisfy at least one of the following conditions:

[0070] The terminal groups are independently monosubstituted by CN or CF3;

[0071] One or more -CH2- groups are independently replaced by -O-, -S-, -SO2-, -CO-, -C(O)O-, -OC(O)-, -OC(O)O-, -CF2O-, -OCF2-, -CH2-CH2-, -(CH2)3-, -CF2-CF2-, -CF2-CH2-, -CH2-CF2-, -CHF-CHF-, -CH2O-, -OCH2-, -CF=CH-, -CH=CF-, -CF=CF-, -CH=CH- or -C≡C-, and the heteroatoms directly bonded to C are not directly bonded to each other;

[0072] At least one H in the group is replaced by any one of F, Cl, Br, or I atoms.

[0073] In some embodiments, when at least one of R1, R2, R3, and R4 is selected from substituted alkyl groups having 1-15 carbon atoms, substituted alkoxy groups having 1-15 carbon atoms, substituted alkenyl groups having 2-15 carbon atoms, substituted alkenyloxy groups having 2-15 carbon atoms, substituted alkynyl groups having 2-15 carbon atoms, or substituted alkynyloxy groups having 2-15 carbon atoms, the terminal groups of at least one of R1, R2, R3, and R4 are each independently monosubstituted by H, CN, or CF3.

[0074] In some embodiments, when at least one of R1, R2, R3, and R4 is selected from substituted alkyl groups having 1-15 carbon atoms, substituted alkoxy groups having 1-15 carbon atoms, substituted alkenyl groups having 2-15 carbon atoms, substituted alkenyl groups having 2-15 carbon atoms, substituted alkynyl groups having 2-15 carbon atoms, or substituted alkynyl groups having 2-15 carbon atoms, one or more -CH2- groups of at least one of R1, R2, R3, and R4 are independently replaced by -O-, -S-, or -SO-, respectively. 2-, -CO-, -C(O)O-, -OC(O)-, -OC(O)O-, -CF2O-, -OCF2-, -CH2-CH2-, -(CH2)3-, -CF2-CF2-, -CF2-CH2-, -CH2-CF2-, -CHF-CHF-, -CH2O-, -OCH2-, -CF=CH-, -CH=CF-, -CF=CF-, -CH=CH- or -C≡C- substitution, and heteroatoms directly bonded to C are not directly bonded to each other.

[0075] In some embodiments, when at least one of R1, R2, R3, and R4 is selected from H, a substituted alkyl group having 1-15 carbon atoms, a substituted alkoxy group having 1-15 carbon atoms, a substituted alkenyl group having 2-15 carbon atoms, an alkenyloxy group having 2-15 carbon atoms, a substituted alkynyl group having 2-15 carbon atoms, or a substituted alkynyloxy group having 2-15 carbon atoms, at least one H in at least one of R1, R2, R3, and R4 is substituted by any atom selected from F, Cl, Br, and I.

[0076] In some embodiments, when there is an unsubstituted alkyl group having 1-15 carbon atoms, an unsubstituted alkoxy group having 1-15 carbon atoms, an unsubstituted alkenyl group having 2-15 carbon atoms, an unsubstituted alkenyl group having 2-15 carbon atoms, an unsubstituted alkynyl group having 2-15 carbon atoms, or an unsubstituted alkynyl group having 2-15 carbon atoms, any H, terminal group, or -CH2- in the unsubstituted alkyl group having 1-15 carbon atoms, an unsubstituted alkoxy group having 1-15 carbon atoms, an unsubstituted alkenyl group having 2-15 carbon atoms, an unsubstituted alkenyl group having 2-15 carbon atoms, or an unsubstituted alkynyl group having 2-15 carbon atoms is not substituted.

[0077] In some embodiments, R1, R2, R3, and R4 are each independently selected from H, F, Cl, Br, substituted or unsubstituted alkyl groups having 1-7 carbon atoms, substituted or unsubstituted alkoxy groups having 1-7 carbon atoms, substituted or unsubstituted alkenyl groups having 2-7 carbon atoms, substituted or unsubstituted alkenyloxy groups having 2-7 carbon atoms, substituted or unsubstituted alkynyl groups having 2-7 carbon atoms, and substituted or unsubstituted alkynyloxy groups having 2-7 carbon atoms.

[0078] Preferably, each time R1, R2, R3, and R4 appear, they are independently selected from H, F, unsubstituted alkyl groups having 1-7 carbon atoms, unsubstituted alkoxy groups having 1-7 carbon atoms, unsubstituted alkenyl groups having 2-7 carbon atoms, unsubstituted alkenyl groups having 2-7 carbon atoms, unsubstituted alkynyl groups having 2-7 carbon atoms, and unsubstituted alkynyl groups having 2-7 carbon atoms.

[0079] More preferably, each time R1, R2, R3, and R4 appear, they are independently selected from H, F, a non-substituted alkyl group having 1-5 carbon atoms, a non-substituted alkoxy group having 1-5 carbon atoms, and a non-substituted alkenyl group having 2-5 carbon atoms.

[0080] In some embodiments, when R1, R2, R3, and R4 are each independently selected from unsubstituted alkyl, unsubstituted alkenyl, or unsubstituted alkynyl groups, the unsubstituted alkyl, unsubstituted alkenyl, and unsubstituted alkynyl groups are aliphatic hydrocarbon groups.

[0081] In some embodiments, when R1, R2, R3, and R4 are each independently selected from unsubstituted alkyl groups, the unsubstituted alkyl group can be a nonsubstituted straight-chain alkyl group or a nonsubstituted branched alkyl group, preferably a nonsubstituted straight-chain alkyl group; when R1, R2, R3, and R4 are each independently selected from unsubstituted straight-chain alkyl groups having 1 to 7 carbon atoms, they can be selected from, for example: methyl, ethyl, propyl, butyl, pentyl, hexyl, or heptyl.

[0082] When R1, R2, R3, and R4 are each 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 an E-configuration or a Z-configuration isomer, and has at least one carbon-carbon double bond. It can be selected from unsubstituted straight-chain alkenyl groups having 2-7 carbon atoms, more preferably vinyl, propenyl, propenyl, butenyl, butenyl, butenyl, butenyl, pentenyl, pentenyl, pentenyl, pentenyl, pentenyl, pentenyl, pentenyl, pentenyl, hexenyl, hexenyl, hexenyl, 3-enyl, hexenyl, 4-enyl, hexenyl, 5-enyl, heptenyl, heptenyl, heptenyl, heptenyl, heptenyl, 3-enyl, heptenyl, 4-enyl, heptenyl, 5-enyl, heptenyl, 6-enyl, etc.

[0083] When R1, R2, R3, and R4 are each independently selected from unsubstituted alkynyl groups, the unsubstituted alkynyl group can be an unsubstituted straight-chain alkynyl group or an unsubstituted branched-chain alkynyl group, and must have at least one carbon-carbon triple bond. It can be selected from unsubstituted straight-chain alkynyl groups having 2-7 carbon atoms, more preferably ethynyl, propynyl, propynyl-1-yl, propynyl-2-yl, butynyl, butynyl-2-yl, butynyl-3-yl, pentynyl, pentynyl-2-yl, etc. - Acynyl, pentylo-3-acynyl, pentylo-4-acynyl, hex-1-acynyl, hex-2-acynyl, hex-3-acynyl, hex-4-acynyl, hex-5-acynyl, hep-1-acynyl, hep-2-acynyl, hep-3-acynyl, hep-4-acynyl, hep-5-acynyl, or hep-6-acynyl; more preferably propylo-2-acynyl, butylo-2-acynyl, butylo-3-acynyl, pentylo-2-acynyl, pentylo-3-acynyl, or pentylo-4-acynyl.

[0084] In some embodiments, the first compound may include compounds shown in formulas (I-a) and (I-c), or the first compound may include compounds shown in formulas (I-b) and (I-c), or the first compound may include compounds shown in formulas (I-a), (I-b), and (I-c). Since the compound shown in formula (I-a) is unstable under ultraviolet light, when the liquid crystal composition is applied to a display panel and a pretilt angle is formed using ultraviolet light alignment (e.g., a display panel in a vertically oriented display mode), the first compound preferably includes compounds shown in formulas (I-b) and (I-c) but not the compound shown in formula (I-a).

[0085] In some embodiments, when the first compound includes the compound shown in formula (I-a), the mass fraction of the compound shown in formula (I-a) in the liquid crystal composition is greater than or equal to 15%, and the mass fraction of the compound shown in formula (I-a) in the liquid crystal composition is less than or equal to 65%. For example, it can be 20%, 22%, 25%, 28%, 30%, 32%, 35%, 38%, 40%, 42%, 45%, 48%, 50%, 52%, 55%, 58%, 60%, 62%, etc. Preferably, when the first compound includes the compound shown in formula (I-a), the mass fraction of the compound shown in formula (I-a) in the liquid crystal composition is greater than or equal to 20%, and the mass fraction of the compound shown in formula (I-a) in the liquid crystal composition is less than or equal to 55%. More preferably, when the first compound includes the compound shown in formula (I-a), the mass fraction of the compound shown in formula (I-a) in the liquid crystal composition is greater than or equal to 25%, and the mass fraction of the compound shown in formula (I-a) in the liquid crystal composition is less than or equal to 50%.

[0086] In some embodiments, when the first compound includes the compound shown in formula (I-b), the mass fraction of the compound shown in formula (I-b) in the liquid crystal composition is greater than or equal to 2%, and the mass fraction of the compound shown in formula (I-b) in the liquid crystal composition is less than or equal to 35%. For example, it can be 3%, 5%, 8%, 10%, 12%, 15%, 18%, 20%, 25%, 28%, 30%, 32%, etc. Preferably, when the first compound includes the compound shown in formula (I-b), the mass fraction of the compound shown in formula (I-b) in the liquid crystal composition is greater than or equal to 5%, and the mass fraction of the compound shown in formula (I-b) in the liquid crystal composition is less than or equal to 30%. More preferably, when the first compound includes the compound shown in formula (I-b), the mass fraction of the compound shown in formula (I-b) in the liquid crystal composition is greater than or equal to 10%, and the mass fraction of the compound shown in formula (I-b) in the liquid crystal composition is less than or equal to 25%.

[0087] In some embodiments, when the first compound includes the compound shown in formula (I-c), the mass fraction of the compound shown in formula (I-c) in the liquid crystal composition is greater than or equal to 1%, and the mass fraction of the compound shown in formula (I-c) in the liquid crystal composition is less than or equal to 25%, for example, it can be 2%, 3%, 5%, 8%, 10%, 12%, 15%, 18%, 20%, 22%, etc. Preferably, when the first compound includes the compound shown in formula (I-c), the mass fraction of the compound shown in formula (I-c) in the liquid crystal composition is greater than or equal to 3%, and the mass fraction of the compound shown in formula (I-c) in the liquid crystal composition is less than or equal to 20%. More preferably, when the first compound includes the compound shown in formula (I-c), the mass fraction of the compound shown in formula (I-c) in the liquid crystal composition is greater than or equal to 5%, and the mass fraction of the compound shown in formula (I-c) in the liquid crystal composition is less than or equal to 15%.

[0088] In some embodiments, the first compound further includes at least one of the following compounds:

[0089]

[0090] In some embodiments, the first compound has a mass fraction greater than or equal to 15% in the liquid crystal composition and less than or equal to 70% in the liquid crystal composition. For example, it can be 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 first compound has a mass fraction greater than or equal to 20% in the liquid crystal composition and less than or equal to 60% in the liquid crystal composition. More preferably, the first compound has a mass fraction greater than or equal to 25% in the liquid crystal composition and less than or equal to 55% in the liquid crystal composition.

[0091] In some embodiments, the first compound comprises at least two of the compounds shown in formulas (I-a), (I-b), and (I-c). Therefore, the sum of the mass fractions of the compounds shown in formulas (I-a), (I-b), and (I-c) in the liquid crystal composition is less than or equal to 70%, for example, it can be 25%, 37%, 40%, 45%, 50%, 65%, etc. Preferably, the sum of the mass fractions of the compounds shown in formulas (I-a), (I-b), and (I-c) in the liquid crystal composition is less than or equal to 60%. More preferably, the sum of the mass fractions of the compounds shown in formulas (I-a), (I-b), and (I-c) in the liquid crystal composition is less than or equal to 55%.

[0092] In some embodiments, the second compound has a mass fraction greater than or equal to 1% in the liquid crystal composition and less than or equal to 15% in the liquid crystal composition, for example, it can be 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, etc. Preferably, the second compound has a mass fraction greater than or equal to 1% in the liquid crystal composition and less than or equal to 10% in the liquid crystal composition. More preferably, the second compound has a mass fraction greater than or equal to 2% in the liquid crystal composition and less than or equal to 6% in the liquid crystal composition.

[0093] In some embodiments, the third compound has a mass fraction greater than or equal to 1% in the liquid crystal composition and less than or equal to 20% in the liquid crystal composition, for example, it can be 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 18%, etc. Preferably, the third compound has a mass fraction greater than or equal to 1% in the liquid crystal composition and less than or equal to 15% in the liquid crystal composition. More preferably, the third compound has a mass fraction greater than or equal to 3% in the liquid crystal composition and less than or equal to 10% in the liquid crystal composition.

[0094] By utilizing the different properties of the first, second, and third compounds, the properties of the liquid crystal composition can be adjusted by modifying their proportions. For example, the response time of the liquid crystal composition when applied to a display panel can be adjusted to meet the response time requirements of different types of display panels. Furthermore, when applied to a display panel, the liquid crystal composition can reduce the response time from 30ms to 25ms, effectively shortening the response time of the display panel using the liquid crystal composition. In addition, the high absolute value of the difference in birefringence between the second and third compounds effectively compensates for the transmittance loss caused by reducing the thickness of the liquid crystal layer in the display panel to lower the response time, thus ensuring that the display panel using the liquid crystal composition shortens the response time without reducing light transmittance. Simultaneously, the high absolute value of the dielectric anisotropy of the liquid crystal composition helps to reduce the driving voltage of the display panel using the liquid crystal composition, thereby reducing power consumption.

[0095] In some embodiments, the liquid crystal composition further includes at least one fourth compound having a structure as shown in general formula (IV):

[0096]

[0097] In the liquid crystal composition, the fourth compound has a high absolute value of birefringence difference and low viscosity, which is beneficial for adjusting the optical anisotropy of the liquid crystal composition so that the optical anisotropy of the liquid crystal composition is within a suitable range, and for reducing the viscosity of the liquid crystal composition, thereby improving the response speed of the display panel when the liquid crystal composition is applied to the display panel.

[0098] In some embodiments, the fourth compound has a mass fraction greater than or equal to 0% in the liquid crystal composition and a mass fraction less than or equal to 40% in the liquid crystal composition. For example, it can be 3%, 5%, 6%, 8%, 10%, 12%, 15%, 18%, 20%, 22%, 25%, 28%, 30%, 32%, 35%, 38%, etc. Preferably, when the liquid crystal composition includes the fourth compound, the mass fraction of the fourth compound in the liquid crystal composition is greater than or equal to 5% and the mass fraction of the fourth compound in the liquid crystal composition is less than or equal to 35%. More preferably, when the liquid crystal composition includes the fourth compound, the mass fraction of the fourth compound in the liquid crystal composition is greater than or equal to 8% and the mass fraction of the fourth compound in the liquid crystal composition is less than or equal to 25%.

[0099] In some embodiments, the liquid crystal composition further includes at least one fifth compound having a structure as shown in general formula (V):

[0100]

[0101] The fifth compound is a dielectric negative material with a high clearing point, a high absolute value of birefringence difference, and low viscosity. This is beneficial for improving the high temperature resistance of the liquid crystal composition, adjusting the optical anisotropy of the liquid crystal composition to keep it within a suitable range, 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.

[0102] In some embodiments, the fifth compound has a mass fraction greater than or equal to 0% in the liquid crystal composition and a mass fraction less than or equal to 15% in the liquid crystal composition, for example, it can be 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, etc. Preferably, when the liquid crystal composition includes the fifth compound, the mass fraction of the fifth compound in the liquid crystal composition is greater than or equal to 2% and the mass fraction of the fifth compound in the liquid crystal composition is less than or equal to 12%. More preferably, when the liquid crystal composition includes the fifth compound, the mass fraction of the fifth compound in the liquid crystal composition is greater than or equal to 4% and the mass fraction of the fifth compound in the liquid crystal composition is less than or equal to 8%.

[0103] In some embodiments, the liquid crystal composition further includes at least one sixth compound having a structure as shown in general formula (VI):

[0104]

[0105] The sixth compound has a high absolute value of birefringence difference, a high clearing point, a high elastic modulus, and a moderate viscosity, which is beneficial for improving the high temperature resistance of the liquid crystal composition and adjusting the optical anisotropy of the liquid crystal composition so that the optical anisotropy of the liquid crystal composition is within a suitable range.

[0106] In some embodiments, the sixth compound has a mass fraction greater than or equal to 0% in the liquid crystal composition and a mass fraction less than or equal to 15% in the liquid crystal composition, for example, it can be 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 12%, 14%, etc. Preferably, when the liquid crystal composition includes the sixth compound, the mass fraction of the sixth compound in the liquid crystal composition is greater than or equal to 1% and the mass fraction of the sixth compound in the liquid crystal composition is less than or equal to 10%. More preferably, when the liquid crystal composition includes the sixth compound, the mass fraction of the sixth compound in the liquid crystal composition is greater than or equal to 2% and the mass fraction of the sixth compound in the liquid crystal composition is less than or equal to 6%.

[0107] In some embodiments, the liquid crystal composition further includes at least one seventh compound having a structure as shown in general formula (Ⅶ):

[0108]

[0109] The seventh compound has a high absolute value of birefringence difference, a high clearing point, a high elastic modulus, and a moderate viscosity, which is beneficial for improving the high temperature resistance of the liquid crystal composition, adjusting the optical anisotropy of the liquid crystal composition so that the optical anisotropy of the liquid crystal composition is within a suitable range, and improving the response speed of the display panel when the liquid crystal composition is applied to the display panel.

[0110] In some embodiments, the seventh compound has a mass fraction greater than or equal to 0% in the liquid crystal composition and a mass fraction less than or equal to 35% in the liquid crystal composition. For example, it can be 2%, 3%, 5%, 6%, 7%, 10%, 12%, 15%, 16%, 18%, 20%, 22%, 24%, 25%, 26%, 28%, 30%, 32%, 33%, etc. Preferably, when the liquid crystal composition includes the seventh compound, the mass fraction of the seventh compound in the liquid crystal composition is greater than or equal to 3% and the mass fraction of the seventh compound in the liquid crystal composition is less than or equal to 30%. More preferably, when the liquid crystal composition includes the seventh compound, the mass fraction of the seventh compound in the liquid crystal composition is greater than or equal to 5% and the mass fraction of the seventh compound in the liquid crystal composition is less than or equal to 25%.

[0111] In some embodiments, the liquid crystal composition further includes at least one eighth compound having a structure as shown in general formula (VIII):

[0112]

[0113] The eighth compound has a high clearing point, a high elastic modulus, and a medium viscosity, which is beneficial for improving the high temperature resistance 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.

[0114] In some embodiments, the eighth compound has a mass fraction greater than or equal to 0% in the liquid crystal composition and a mass fraction less than or equal to 35% in the liquid crystal composition. For example, it can be 2%, 3%, 5%, 6%, 7%, 10%, 12%, 15%, 16%, 18%, 20%, 22%, 24%, 25%, 26%, 28%, 30%, 32%, 33%, etc. Preferably, when the liquid crystal composition includes the eighth compound, the mass fraction of the eighth compound in the liquid crystal composition is greater than or equal to 3% and the mass fraction of the eighth compound in the liquid crystal composition is less than or equal to 30%. More preferably, when the liquid crystal composition includes the eighth compound, the mass fraction of the eighth compound in the liquid crystal composition is greater than or equal to 5% and the mass fraction of the eighth compound in the liquid crystal composition is less than or equal to 25%.

[0115] In some embodiments, the liquid crystal composition further includes at least one ninth compound having a structure as shown in general formula (IX):

[0116]

[0117] The ninth compound has a moderate absolute value of dielectric anisotropy, a high clearing point, a high elastic modulus, and a high viscosity, which is beneficial for improving the high temperature resistance of the liquid crystal composition, adjusting 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.

[0118] In some embodiments, the ninth compound has a mass fraction greater than or equal to 0% in the liquid crystal composition and a mass fraction less than or equal to 35% in the liquid crystal composition. For example, it can be 2%, 3%, 5%, 6%, 7%, 10%, 12%, 15%, 16%, 18%, 20%, 22%, 24%, 25%, 26%, 28%, 30%, 32%, 33%, etc. Preferably, when the liquid crystal composition includes the ninth compound, the mass fraction of the ninth compound in the liquid crystal composition is greater than or equal to 3% and the mass fraction of the ninth compound in the liquid crystal composition is less than or equal to 25%. More preferably, when the liquid crystal composition includes the ninth compound, the mass fraction of the ninth compound in the liquid crystal composition is greater than or equal to 5% and the mass fraction of the ninth compound in the liquid crystal composition is less than or equal to 20%.

[0119] In some embodiments, the liquid crystal composition further includes at least one tenth compound having a structure as shown in general formula (X):

[0120]

[0121] The tenth compound has a moderate absolute value of dielectric anisotropy, a high clearing point, a high absolute value of birefringence difference, a high elastic modulus, and a high viscosity, which is beneficial for improving the high temperature resistance of the liquid crystal composition, adjusting the viscosity and optical anisotropy 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.

[0122] In some embodiments, the tenth compound has a mass fraction greater than or equal to 0% in the liquid crystal composition and a mass fraction less than or equal to 30% in the liquid crystal composition. For example, it can be 1%, 2%, 3%, 5%, 6%, 8%, 10%, 12%, 14%, 15%, 16%, 17%, 18%, 20%, 22%, 24%, 25%, 28%, etc. Preferably, when the liquid crystal composition includes the tenth compound, the mass fraction of the tenth compound in the liquid crystal composition is greater than or equal to 3% and the mass fraction of the tenth compound in the liquid crystal composition is less than or equal to 25%. More preferably, when the liquid crystal composition includes the tenth compound, the mass fraction of the tenth compound in the liquid crystal composition is greater than or equal to 5% and the mass fraction of the tenth compound in the liquid crystal composition is less than or equal to 20%.

[0123] In some embodiments, in the structures shown in general formula (IV) to general formula (X), R5, R6, R7, R8, R9, R 10 R 11 R 12 R 13 R 14 R 15 R 16 R 17 R 18 Each time it appears, it is independently selected from substituted or unsubstituted alkyl groups having 1-10 carbon atoms, substituted or unsubstituted alkoxy groups having 1-10 carbon atoms, substituted or unsubstituted alkenyl groups having 2-10 carbon atoms, substituted or unsubstituted alkenyloxy groups having 2-10 carbon atoms, substituted or unsubstituted alkynyl groups having 2-10 carbon atoms, and substituted or unsubstituted alkynyloxy groups having 2-10 carbon atoms.

[0124] In some embodiments, the substituted alkyl group having 1-10 carbon atoms, the substituted alkoxy group having 1-10 carbon atoms, the substituted alkenyl group having 2-10 carbon atoms, the substituted alkenyl group having 2-10 carbon atoms, the substituted alkynyl group having 2-10 carbon atoms, and the substituted alkynyl group having 2-10 carbon atoms satisfy the following conditions:

[0125] At least one H in the group is replaced by any one of F, Cl, Br, or I atoms.

[0126] In some embodiments, R5, R6, R7, R8, R9, R 10 R 11 R 12 R 13 R 14 R 15 R 16 R17 R 18 Each time it appears, it is independently selected from unsubstituted alkyl groups having 1-10 carbon atoms, unsubstituted alkoxy groups having 1-10 carbon atoms, unsubstituted alkenyl groups having 2-10 carbon atoms, unsubstituted alkenyloxy groups having 2-10 carbon atoms, unsubstituted alkynyl groups having 2-10 carbon atoms, or unsubstituted alkynyloxy groups having 2-10 carbon atoms.

[0127] In some embodiments, R5, R6, R7, R8, R9, R 10 R 11 R 12 R 13 R 14 R 15 R 16 R 17 R 18 Each time it appears, at least one of them is selected from substituted or unsubstituted alkyl groups having 1-7 carbon atoms, substituted or unsubstituted alkoxy groups having 1-7 carbon atoms, and substituted or unsubstituted alkenyl groups having 2-7 carbon atoms. Preferably, R5, R6, R7, R8, R9, R 10 R 11 R 12 R 13 R 14 R 15 R 16 R 17 R 18 Each time it appears, it is independently selected from unsubstituted alkyl groups having 1-7 carbon atoms, unsubstituted alkoxy groups having 1-7 carbon atoms, and unsubstituted alkenyl groups having 2-7 carbon atoms.

[0128] More preferably, R5, R6, R7, R8, R9, R 10 R 11 R 12 R 13 R 14 R 15 R 16 R 17 R 18 Each time it appears, it is independently selected from unsubstituted alkyl groups having 1-5 carbon atoms, unsubstituted alkoxy groups having 1-5 carbon atoms, and unsubstituted alkenyl groups having 2-5 carbon atoms.

[0129] In some embodiments, when R5, R6, R7, R8, R9, R 10 R 11 R 12 R 13 R 14 R15 R 16 R 17 R 18 When at least one of them is selected from unsubstituted alkyl groups, the unsubstituted alkyl group can be a non-substituted straight-chain alkyl group or a non-substituted branched-chain alkyl group, preferably a non-substituted straight-chain alkyl group; R5, R6, R7, R8, R9, R 10 R 11 R 12 R 13 R 14 R 15 R 16 R 17 R 18 Each time it appears, it is independently selected from non-substituted straight-chain alkyl groups having 1 to 7 carbon atoms, such as methyl, ethyl, propyl, butyl, pentyl, hexyl, or heptyl.

[0130] When R5, R6, R7, R8, R9, R 10 R 11 R 12 R 13 R 14 R 15 R 16 R 17 R 18 When at least one of the components is 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 an E-configuration and a Z-configuration isomer, and has at least one carbon-carbon double bond. It can be selected from unsubstituted straight-chain alkenyl groups having 2-7 carbon atoms, more preferably vinyl, propenyl, propenyl, butenyl, butenyl, butenyl, butenyl, pentenyl, pentenyl, pentenyl, pentenyl, pentenyl, pentenyl, pentenyl, pentenyl, hexenyl, hexenyl, hexenyl, 3-enyl, hexenyl, 4-enyl, hexenyl, 5-enyl, heptenyl, heptenyl, heptenyl, heptenyl, 3-enyl, heptenyl, 4-enyl, heptenyl, 5-enyl, heptenyl, 6-enyl, etc.

[0131] In some embodiments, the liquid crystal composition further includes at least one stabilizer having the following structure:

[0132]

[0133] Among them, R 19 Each time it appears, it is independently selected from substituted or unsubstituted alkyl groups having 1 to 5 carbon atoms.

[0134] The stabilizer is used to stabilize the liquid crystal composition under conditions such as high temperature and ultraviolet light when the liquid crystal composition is applied to a display panel, thereby improving the product quality of the display panel using the liquid crystal composition.

[0135] In some embodiments, the substituted alkyl groups having 1-5 carbon atoms satisfy the following conditions:

[0136] At least one H in the group is replaced by any one of F, Cl, Br, or I atoms.

[0137] In some embodiments, R 19 Each time it appears, it is selected from non-substituted alkyl groups having 1-5 carbon atoms, such as non-substituted straight-chain alkyl groups or non-substituted branched alkyl groups having 1-5 carbon atoms.

[0138] In some embodiments, the difference in birefringence of the liquid crystal composition at 25°C is greater than or equal to 0.09, and the optical anisotropy value of the liquid crystal composition at 25°C is less than or equal to 0.22, for example: 0.1, 0.102, 0.104, 0.105, 0.106, 0.108, 0.11, 0.115, 0.12, 0.125, 0.15, 0.175, 0.2, 0.21, etc., so that the difference in birefringence of the liquid crystal composition is within a suitable range, ensuring that the light transmittance of the liquid crystal composition is within a suitable range, so as to adapt to various display panels with different application requirements.

[0139] In some embodiments, the rotational viscosity of the liquid crystal composition at 25°C is greater than or equal to 40 mPa·s, and the rotational viscosity of the liquid crystal composition at 25°C is less than or equal to 100 mPa·s, for example: 45 mPa·s, 50 mPa·s, 52 mPa·s, 55 mPa·s, 60 mPa·s, 65 mPa·s, 70 mPa·s, 75 mPa·s, 80 mPa·s, 85 mPa·s, 90 mPa·s, 95 mPa·s, etc., so that the rotational viscosity of the liquid crystal composition is within a suitable range, thereby increasing the rotational speed of the liquid crystal composition and ensuring that the response time of the liquid crystal composition is within a suitable range.

[0140] In some embodiments, the flexural elasticity coefficient of the liquid crystal composition is greater than or equal to 10, and the flexural elasticity coefficient of the liquid crystal composition is less than or equal to 26, for example: 10.5, 10.6, 10.8, 11, 12, 13, 13.1, 13.5, 14, 14.2, 15, 18, 20, 22, 24, 25, etc.; and / or, the flexural elasticity coefficient of the liquid crystal composition is greater than or equal to 10, and the flexural elasticity coefficient of the liquid crystal composition is less than or equal to 26, for example: 10.5, 10.6, 11, 12, 13, 13.5, 13.7, 14, 15, 16, 16.1, 16.5, 18, 20, 22, 24, 25, etc.; the flexural elasticity coefficient and / or the flexural elasticity coefficient of the liquid crystal composition being within the above ranges is beneficial for the liquid crystal composition to obtain a suitable average value of elasticity coefficient, effectively improving the response speed of the display panel when the liquid crystal composition is applied to the display surface, thereby obtaining a faster response time.

[0141] In some embodiments, the dielectric constant anisotropy value of the liquid crystal composition at 25°C is less than 0, and the dielectric constant anisotropy value of the liquid crystal composition at 25°C is greater than or equal to -5, for example: -4.8, -4.5, -4.1, -4, -3.5, -3.4, -3.2, -3, -2, -1, etc., which is beneficial to reduce the driving voltage required to drive the liquid crystal composition, thereby reducing the driving voltage of the liquid crystal display panel using the liquid crystal composition and reducing the power consumption of the liquid crystal display panel using the liquid crystal composition.

[0142] In some embodiments, the clearing point of the liquid crystal composition is preferably between 70°C and 135°C. For example, the clearing point of the liquid crystal composition can be 75°C, 77°C, 79°C, 80°C, 82°C, 84°C, 85°C, 88°C, 90°C, 92°C, 95°C, 100°C, 105°C, 110°C, 115°C, 120°C, 125°C, 130°C, etc., to avoid the liquid crystal composition's high-temperature resistance being reduced due to an excessively low clearing point.

[0143] Please see Figure 1 An exemplary method for preparing the liquid crystal composition provided by the present invention is as follows:

[0144] The method for preparing the liquid crystal composition includes:

[0145] S100: Weigh and mix the first compound, the second compound, and the third compound in a first order by mass percentage to obtain a first mixture.

[0146] The preferred order is that the first compound, the second compound, and the third compound are weighed and mixed in order of increasing melting point.

[0147] When the liquid crystal composition further includes at least one of the fifth compound, the sixth compound, the seventh compound, the eighth compound, the ninth compound, and the tenth compound, the first mixture further includes at least one of the fifth compound, the sixth compound, the seventh compound, the eighth compound, the ninth compound, and the tenth compound, which are mixed with the first compound, the second compound, and the third compound in the first order to form the first mixture.

[0148] S200: Stir the first mixture at a first heating temperature to ensure that the first compound, the second compound, and the third compound in the first mixture are fully mixed.

[0149] The first heating temperature is preferably 60°C to 100°C.

[0150] When the first mixture contains at least one of the fifth compound, the sixth compound, the seventh compound, the eighth compound, the ninth compound, and the tenth compound, at least one of the fifth compound, the sixth compound, the seventh compound, the eighth compound, the ninth compound, and the tenth compound is thoroughly mixed with the first compound, the second compound, and the third compound.

[0151] S300: Cool the first mixture to room temperature and encapsulate it to obtain the liquid crystal composition.

[0152] Exemplary configurations of the liquid crystal composition of the present invention are shown in Exemplary Embodiments 1 to 3 below.

[0153] Example 1

[0154] The structural formulas and mass fractions of each compound in the liquid crystal composition selected in this embodiment are shown in Table 1:

[0155] Table 1: Components of the Liquid Crystal Composition

[0156]

[0157]

[0158] The liquid crystal composition obtained in Example 1 has the following performance parameters: Tni: 82℃, γ 1: 60mPa·s, Δn: 0.110, ne: 1.583, Δε: -3.0, ε ⊥ 6.2, K 11 14.2, K 3316.1, No crystals precipitated after the liquid crystal composition was placed at -20℃ for 480 h. Wherein, Tni represents the clearing point of the liquid crystal composition; γ1 represents the rotational viscosity of the liquid crystal composition at 25℃; Δn is the difference in birefringence of the liquid crystal composition at 25℃, representing the optical anisotropy of the liquid crystal composition; ne represents the refractive index of the liquid crystal composition for unusual light; Δε represents the anisotropic value of the dielectric constant of the liquid crystal composition at 25℃; ε ⊥ K represents the dielectric constant of the liquid crystal composition in the direction perpendicular to the long axis of the liquid crystal molecules. 11 K represents the flexural elasticity coefficient of the liquid crystal composition. 33 This represents the stretch elastic coefficient of the liquid crystal composition.

[0159] Example 2

[0160] The structural formulas and mass fractions of each compound in the liquid crystal composition selected in this embodiment are shown in Table 2:

[0161] Table 2: Components of the Liquid Crystal Composition

[0162]

[0163]

[0164]

[0165] The liquid crystal composition obtained in Example 2 has the following performance parameters: Tni: 85℃, γ 1: 65mPa·s, Δn: 0.109, ne: 1.578, Δε: -4.1, ε ⊥ 8.0, K 11 13.1, K 33 :13.7, No crystals precipitated after the liquid crystal composition was placed at -20°C for 480 hours.

[0166] Example 3

[0167] The structural formulas and mass fractions of each compound in the liquid crystal composition selected in this embodiment are shown in Table 3:

[0168] Table 3: Components of the Liquid Crystal Composition

[0169]

[0170]

[0171] The liquid crystal composition obtained in Example 3 has the following performance parameters: Tni: 79℃, γ1: 52 mPa·s, Δn: 0.107, ne: 1.569, Δε: -3.4, ε ⊥ 6.7, K11 10.8, K 33 :10.6, No crystals precipitated after the liquid crystal composition was placed at -20°C for 480 hours.

[0172] Comparative Example 1

[0173] The structural formulas and mass fractions of each compound in the liquid crystal composition selected in this comparative example are shown in Table 4:

[0174] Table 4: Components of the Liquid Crystal Composition

[0175]

[0176]

[0177] The liquid crystal composition obtained in Comparative Example 1 has the following performance parameters: Tni: 80℃, γ 1: 65mPa·sΔn:0.104,ne:1.561,Δε:-3.0,ε ⊥ 6.1, K 11 13.9, K 33 :15.4, No crystals precipitated after the liquid crystal composition was placed at -20°C for 480 hours.

[0178] The three liquid crystal compositions provided in Examples 1 to 3 above all have a clearing point between 79°C and 85°C, giving them good high-temperature resistance; their rotational viscosity at 25°C is between 52 mPa·s and 65 mPa·s, giving them good rotational speed, which is beneficial for shortening the response time of the liquid crystal compositions; the difference in birefringence at 25°C is between 0.107 and 0.110, giving them good light transmittance; the anisotropy of the dielectric constant at 25°C is between -4.1 and -3.0, which is beneficial for driving the liquid crystal compositions at a lower driving voltage, thereby reducing the power consumption of the display panel using the liquid crystal compositions; the flexural elasticity coefficient of the liquid crystal compositions is between 10.8 and 14.2, and the stretch elasticity coefficient is between 10.6 and 16.1, which is beneficial for shortening the response time of the display panel when the liquid crystal compositions are applied to the display surface. Compared with Comparative Example 1, Example 1 effectively reduced the viscosity of the liquid crystal composition and improved the clearing point of the liquid crystal composition by having a first compound, a second compound and a third compound in the liquid crystal composition. It also improved the elasticity coefficient, which is beneficial to shorten the response time of the display panel using the liquid crystal composition.

[0179] Please see Figure 2This invention also 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. The liquid crystal layer 103 includes the liquid crystal composition described above.

[0180] 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 on the substrate, a first insulating layer on the active layer, a gate layer on the first insulating layer, a second insulating layer on the gate layer, a source-drain layer on the second insulating layer, and a third insulating layer on the source-drain layer, wherein the source-drain layer includes a source and a drain. The display panel further includes a common electrode layer and a pixel electrode layer, wherein the pixel electrode layer is located on the side of the third insulating layer away from the first substrate, and the pixel electrode layer includes a pixel electrode, which is electrically connected to the source or the drain. The common electrode layer includes a common electrode, which may be disposed on the first substrate 101, located between the pixel electrode layer and the source / drain layer, or located on the side of the pixel electrode layer away from the first substrate; the common electrode layer may also be disposed on the second substrate 102, which includes a second substrate, with the common electrode layer located on the side of the second substrate closer to the liquid crystal layer. The display panel further includes a color filter layer, which may be disposed on the side of the first substrate closer to the liquid crystal layer or on the side of the second substrate closer to the liquid crystal layer.

[0181] The display panel 100 can be a display panel with display modes such as VA (Vertical Alignment), ECB (Electrically Controlled Birefringence), FFS (Fringe Field Switching), or IPS (In-Ilane Iwitching).

[0182] The present invention improves the performance of the liquid crystal composition in terms of clearing point, viscosity, and elasticity by including a first compound, a second compound, and a third compound in the liquid crystal composition, wherein the first compound has a specific structural compound. This improves the response time of the display panel using the liquid crystal composition.

[0183] This invention discloses a liquid crystal composition and a display panel. The liquid crystal composition includes at least two first compounds, at least one second compound, and at least one third compound. The first compound has a structure as shown in general formula (I), the second compound has a structure as shown in general formula (II), and the third compound has a structure as shown in general formula (III). The first compound includes at least two compounds shown in formulas (I-a), (I-b), and (I-c). By including the first, second, and third compounds in the liquid crystal composition, and with the first compound having a specific structural compound, this invention improves the performance of the liquid crystal composition in terms of clearing point, viscosity, and elasticity, thereby improving the response time of the display panel using the liquid crystal composition.

[0184] The liquid crystal composition and display panel provided by the embodiments of the present invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A liquid crystal composition, characterized by comprising The liquid crystal composition comprises at least two first compounds, at least one second compound, and at least one third compound; The first compound has a structure as shown in general formula (Ⅰ): (Ⅰ) The second compound has a structure as shown in general formula (II): (Ⅱ) The third compound has a structure as shown in general formula (Ⅲ): (Ⅲ) The first compound includes at least one of the compounds shown in formula (I-c) and the compounds shown in formulas (I-a) and (I-b): (Ⅰ-a) (Ⅰ-b) (Ⅰ-c) R1 is selected from alkyl groups having 1-15 unsubstituted carbon atoms; In formula (Ⅰ), R2 is selected from alkyl groups having 1-15 unsubstituted carbon atoms or alkenyl groups having 2-15 unsubstituted carbon atoms; In formula (II), R2 is selected from unsubstituted alkoxy groups having 1-15 carbon atoms; R3 is selected from H or an alkenyl group having 2-15 unsubstituted carbon atoms; R4 is selected from unsubstituted alkoxy groups having 1-15 carbon atoms; The first compound contains a mass fraction of 15% or more and less than or equal to 70% in the liquid crystal composition; The second compound has a mass fraction of 1% or more in the liquid crystal composition, and the mass fraction of the second compound in the liquid crystal composition is less than or equal to 15%. The third compound has a mass fraction of greater than or equal to 1% in the liquid crystal composition and a mass fraction of less than or equal to 20% in the liquid crystal composition.

2. The liquid crystal composition according to claim 1, characterized by When the first compound includes the compound shown in formula (I-a), the mass fraction of the compound shown in formula (I-a) in the liquid crystal composition is greater than or equal to 15%, and the mass fraction of the compound shown in formula (I-a) in the liquid crystal composition is less than or equal to 65%. When the first compound includes the compound shown in formula (I-b), the mass fraction of the compound shown in formula (I-b) in the liquid crystal composition is greater than or equal to 2%, and the mass fraction of the compound shown in formula (I-b) in the liquid crystal composition is less than or equal to 35%. When the first compound includes the compound shown in formula (I-c), the mass fraction of the compound shown in formula (I-c) in the liquid crystal composition is greater than or equal to 1%, and the mass fraction of the compound shown in formula (I-c) in the liquid crystal composition is less than or equal to 25%.

3. The liquid crystal composition according to claim 2, characterized by When the first compound includes the compound shown in formula (I-a), the mass fraction of the compound shown in formula (I-a) in the liquid crystal composition is greater than or equal to 20%, and the mass fraction of the compound shown in formula (I-a) in the liquid crystal composition is less than or equal to 55%. When the first compound includes the compound shown in formula (I-b), the mass fraction of the compound shown in formula (I-b) in the liquid crystal composition is greater than or equal to 5%, and the mass fraction of the compound shown in formula (I-b) in the liquid crystal composition is less than or equal to 30%. When the first compound includes the compound shown in formula (I-c), the mass fraction of the compound shown in formula (I-c) in the liquid crystal composition is greater than or equal to 3%, and the mass fraction of the compound shown in formula (I-c) in the liquid crystal composition is less than or equal to 20%.

4. The liquid crystal composition according to claim 1, characterized by The first compound also includes at least one of the following compounds: 、 、 、 。 5. The liquid crystal composition according to claim 1, wherein The liquid crystal composition further includes at least one of the following: a fourth compound having the structure shown in general formula (IV), a fifth compound having the structure shown in general formula (V), a sixth compound having the structure shown in general formula (VI), a seventh compound having the structure shown in general formula (VII), an eighth compound having the structure shown in general formula (VIII), a ninth compound having the structure shown in general formula (IX), and a tenth compound having the structure shown in general formula (X). (IV) (Ⅴ) (Ⅵ) (Ⅶ) (VIII) (IX) (X) Among them, R5, R6, R7, R8, R9, R 10 R 11 R 12 R 13 R 14 R 15 R 16 R 17 R 18 Each time it appears, it is independently selected from substituted or unsubstituted alkyl groups having 1-10 carbon atoms, substituted or unsubstituted alkoxy groups having 1-10 carbon atoms, substituted or unsubstituted alkenyl groups having 2-10 carbon atoms, substituted or unsubstituted alkenyloxy groups having 2-10 carbon atoms, substituted or unsubstituted alkynyl groups having 2-10 carbon atoms, and substituted or unsubstituted alkynyloxy groups having 2-10 carbon atoms.

6. The liquid crystal composition according to claim 5, characterized by The mass fraction of the fourth compound in the liquid crystal composition is greater than or equal to 0%, and the mass fraction of the fourth compound in the liquid crystal composition is less than or equal to 40%. The fifth compound has a mass fraction greater than or equal to 0% in the liquid crystal composition, and the mass fraction of the fifth compound in the liquid crystal composition is less than or equal to 15%. The sixth compound has a mass fraction greater than or equal to 0% in the liquid crystal composition, and the mass fraction of the sixth compound in the liquid crystal composition is less than or equal to 15%. The seventh compound has a mass fraction greater than or equal to 0% in the liquid crystal composition, and the mass fraction of the seventh compound in the liquid crystal composition is less than or equal to 35%. The eighth compound has a mass fraction greater than or equal to 0% in the liquid crystal composition, and the eighth compound has a mass fraction less than or equal to 35% in the liquid crystal composition. The mass fraction of the ninth compound in the liquid crystal composition is greater than or equal to 0%, and the mass fraction of the ninth compound in the liquid crystal composition is less than or equal to 35%. The tenth compound has a mass fraction greater than or equal to 0% in the liquid crystal composition, and the mass fraction of the tenth compound in the liquid crystal composition is less than or equal to 30%.

7. The liquid crystal composition according to claim 1, characterized by The liquid crystal composition further includes at least one stabilizer having the following structure: wherein R 19 each occurrence is independently selected from substituted or unsubstituted alkyl having 1-5 carbon atoms.

8. The liquid crystal composition according to any one of claims 1 to 7, characterized by, The first compound has a mass fraction of 15% or more in the liquid crystal composition, and the first compound has a mass fraction of less than or equal to 70% in the liquid crystal composition; The second compound has a mass fraction of 1% or more in the liquid crystal composition, and the mass fraction of the second compound in the liquid crystal composition is less than or equal to 15%. The third compound has a mass fraction of greater than or equal to 1% in the liquid crystal composition and a mass fraction of less than or equal to 20% in the liquid crystal composition.

9. A display panel, characterized by, It includes 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 comprises a liquid crystal composition as described in any one of claims 1 to 8.

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