Liquid crystal composition and application thereof

Abstract

The invention relates to the technical field of liquid crystal materials, in particular to a liquid crystal composition and application thereof.The liquid crystal composition comprises one or more compounds with the structure shown in the general formula I, one or more compounds with the structure shown in the general formula II and one or more compounds with the structure shown in the general formula III, and one or more compounds with structures as shown in a general formula IV. The liquid crystal composition provided by the invention has the excellent properties of low rotary viscosity, large elastic constant, large optical anisotropy, high response speed, good low-temperature intersolubility and the like, can effectively improve the response speed of a liquid crystal display, and can be used for fast-response liquid crystal display of multiple display modes; when the liquid crystal composition is used in a VA, IPS or FFS mode display, the display effect of a liquid crystal display can be obviously improved, and the liquid crystal composition is particularly suitable for IPS and FFS mode liquid crystal displays.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid crystal materials, in particular to a liquid crystal composition and application thereof, and specifically to a dibenzothiophene liquid crystal composition containing cyclopentene and application thereof. Background Art

[0002] At present, LCD (liquid crystal display) product technology has matured, successfully solving technical problems such as viewing angle, resolution, color saturation and brightness, and its display performance has approached or exceeded that of CRT displays. Large-size and medium-sized LCDs have gradually occupied the mainstream position of flat panel displays in their respective fields. However, due to the constraints of the liquid crystal material itself (high viscosity), the response time has become the main factor affecting high-performance displays.

[0003] Negative liquid crystal was proposed in the late 1980s. It is mainly used in VA mode. Its main advantage is high contrast, and its main disadvantage is small viewing angle and slow response time. With the development of display technology, MVA, PVA, PSVA and other technologies have emerged one after another, and the response time and viewing angle problems have been improved to a certain extent. In recent years, as touch screens have become the mainstream of the mobile device market, IPS and FFS hard screen displays have inherent advantages. IPS and FFS displays can use both positive and negative liquid crystals. Due to the curved electric field in this type of display, positive liquid crystals are arranged along the direction of the electric field lines, which causes the molecules to bend, resulting in a decrease in transmittance; negative liquid crystals are arranged perpendicular to the direction of the electric field lines, so the transmittance will be greatly improved. It is currently the best way to increase transmittance and reduce backlight power consumption. However, the response time problem of negative liquid crystals is a major problem currently encountered. The response time of FFS displays using negative liquid crystals is 50% or more slower than that of FFS displays using positive liquid crystals.

[0004] Therefore, how to improve the response time of negative liquid crystal has become the core issue at present. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a liquid crystal composition and its application. The liquid crystal composition provided by the present invention has excellent properties such as low rotational viscosity, large elastic constant, large optical anisotropy, fast response speed and good low-temperature miscibility, and can effectively improve the response speed of liquid crystal displays.

[0006] In a first aspect, the present invention provides a liquid crystal composition, comprising one or more compounds of the structure shown in general formula I, one or more compounds of the structure shown in general formula II, one or more compounds of the structure shown in general formula III, and one or more compounds of the structure shown in general formula IV;

[0007] in,

[0008]

[0009] Wherein, R1 is selected from any one of an alkyl group of 1 to 7 carbon atoms or an alkenyl group of 2 to 7 carbon atoms;

[0010]

[0011] Wherein, R2 and R3 are each independently selected from any one of an alkyl or alkoxy group having 1 to 7 carbon atoms, and an alkenyl group having 2 to 7 carbon atoms;

[0012]

[0013] Wherein, R4 and R5 are each independently selected from any one of an alkyl or alkoxy group having 1 to 7 carbon atoms, and an alkenyl group having 2 to 7 carbon atoms, Selected from

[0014]

[0015] Wherein, R6 and R7 are each independently selected from any one of an alkyl or alkoxy group having 1 to 7 carbon atoms, and an alkenyl group having 2 to 7 carbon atoms, Selected from

[0016] The 1-7 can be 1, 2, 3, 4, 5, 6, 7, etc., and the 2-7 can be 2, 3, 4, 5, 6, 7, etc.

[0017] The liquid crystal composition provided by the present invention has excellent properties such as low rotational viscosity, large elastic constant, large optical anisotropy, fast response speed and good low-temperature miscibility, and can effectively improve the response speed of liquid crystal displays. Specifically:

[0018] Response time and elastic constant K of liquid crystal compositions 11It is a positive correlation, and it is negatively correlated with the rotational viscosity γ1, that is, the response time of the liquid crystal is limited by the rotational viscosity and elastic constant of the liquid crystal. Reducing the rotational viscosity of the liquid crystal composition and increasing the elastic constant have a significant effect on reducing the response time of the liquid crystal display and improving the response speed of the liquid crystal display. In the liquid crystal composition provided by the present invention, the compound of the structure shown in the general formula I is a dibenzothiophene compound containing a cyclopentene end group, which has a large dielectric constant, a large elastic constant and a high clearing point; the compound of the structure shown in the general formula II is a compound containing bicyclohexane, which is a two-ring neutral compound, which has good low-temperature solubility and low rotational viscosity and negative dielectric constant, and can effectively improve the miscibility of the liquid crystal composition; the compound of the structure shown in the general formula III is a compound containing a three-ring negative dielectric constant, which has a large negative dielectric constant and a high clearing point, and can further increase the operating temperature of the liquid crystal display and reduce the driving voltage; the compound of the structure shown in the general formula IV is a two-ring negative dielectric constant compound, which has a low clearing point and good low-temperature solubility, and can effectively reduce the driving voltage. The four work synergistically, so that the liquid crystal composition provided by the present invention has a smaller γ1 / K 11 The ratio can greatly improve the response speed of the liquid crystal display and can be used for fast-response liquid crystal displays in various display modes.

[0019] As a preferred technical solution of the present invention, R1 is selected from any one of a straight-chain alkyl group with 1 to 5 carbon atoms or a straight-chain alkenyl group with 2 to 5 carbon atoms.

[0020] As a preferred technical solution of the present invention, R2 is selected from any one of a straight-chain alkyl group with 1 to 5 carbon atoms or a straight-chain alkenyl group with 2 to 3 carbon atoms.

[0021] As a preferred technical solution of the present invention, R3 is selected from any one of a straight-chain alkyl group with 1 to 5 carbon atoms or a straight-chain alkenyl group with 2 to 5 carbon atoms.

[0022] As a preferred technical solution of the present invention, R4 is selected from any one of a straight-chain alkyl group having 1 to 5 carbon atoms or a straight-chain alkenyl group having 2 to 5 carbon atoms.

[0023] As a preferred technical solution of the present invention, R5 is selected from any one of a straight-chain alkyl group with 1 to 5 carbon atoms or a straight-chain alkoxy group with 1 to 5 carbon atoms, wherein the O atom is a connecting group connected to the benzene ring.

[0024] As a preferred technical solution of the present invention, R6 is selected from any one of a straight-chain alkyl group with 1 to 5 carbon atoms or a straight-chain alkenyl group with 2 to 5 carbon atoms.

[0025] As a preferred technical solution of the present invention, R7 is selected from any one of a straight-chain alkyl group with 1 to 5 carbon atoms or a straight-chain alkoxy group with 1 to 5 carbon atoms, wherein the O atom is a connecting group connected to the benzene ring.

[0026] In the present invention, the alkyl group of 1-5 carbon atoms can be methyl, ethyl, propyl, butyl or pentyl, etc., the alkoxy group of 1-5 carbon atoms can be methoxy, ethoxy, propoxy, butoxy or pentyl, the O atom is a connecting group connected to the benzene ring, and the alkenyl group of 2-5 carbon atoms can be vinyl, propenyl, butenyl or pentenyl, and can be a terminal alkenyl or a non-terminal alkenyl.

[0027] As a preferred technical solution of the present invention, the compound with the structure shown in general formula I is selected from any one of the following compounds:

[0028]

[0029] As a preferred technical solution of the present invention, the compound with the structure shown in general formula II is selected from any one of the following compounds:

[0030]

[0031] As a preferred technical solution of the present invention, the compound with the structure shown in general formula III is selected from any one of the following compounds:

[0032]

[0033]

[0034]

[0035]

[0036]

[0037] As a preferred technical solution of the present invention, the compound with the structure shown in general formula IV is selected from any one of the following compounds:

[0038]

[0039]

[0040]

[0041]

[0042] As a preferred technical solution of the present invention, based on the total mass of the liquid crystal composition as 100%, the content of the compound with the structure shown in general formula I is 1-20%, the content of the compound with the structure shown in general formula II is 1-60%, the content of the compound with the structure shown in general formula III is 1-50%, and the content of the compound with the structure shown in general formula IV is 1-30%.

[0043] Among them, the content of the compound with the structure shown in the general formula I is 1-20%, for example, it can be 1%, 2%, 5%, 8%, 10%, 12%, 14%, 16%, 18%, 20%, etc.; the content of the compound with the structure shown in the general formula II is 1-60%, for example, it can be 1%, 5%, 10%, 20%, 30%, 40%, 50%, 60%, etc.; the content of the compound with the structure shown in the general formula III is 1-50%, for example, it can be 1%, 5%, 10%, 20%, 30%, 40%, 50%, etc.; the content of the compound with the structure shown in the formula IV is 1-30%, for example, it can be 1%, 5%, 10%, 20%, 30%, etc.

[0044] As a preferred technical solution of the present invention, based on the total mass of the liquid crystal composition as 100%, the content of the compound with the structure shown in general formula I is 1-15%, the content of the compound with the structure shown in general formula II is 20-55%, the content of the compound with the structure shown in general formula III is 10-50%, and the content of the compound with the structure shown in general formula IV is 1-20%.

[0045] As a preferred technical solution of the present invention, based on the total mass of the liquid crystal composition as 100%, the content of the compound with the structure shown in general formula I is 5-15%, the content of the compound with the structure shown in general formula II is 30-55%, the content of the compound with the structure shown in general formula III is 25-50%, and the content of the compound with the structure shown in general formula IV is 5-20%.

[0046] As a preferred technical solution of the present invention, based on the total mass of the liquid crystal composition as 100%, the content of the compound with the structure shown in general formula I is 10-15%, the content of the compound with the structure shown in general formula II is 30-55%, the content of the compound with the structure shown in general formula III is 25-40%, and the content of the compound with the structure shown in general formula IV is 5-15%.

[0047] As a preferred technical solution of the present invention, the liquid crystal composition further comprises one or more compounds of the structure shown in general formula V:

[0048]

[0049] Wherein, R8 and R9 are each independently selected from any one of an alkyl group of 1 to 7 carbon atoms or an alkenyl group of 2 to 7 carbon atoms.

[0050] The compound of the structure shown in the general formula V provided by the present invention is a two-ring neutral compound with low rotational viscosity and good low-temperature solubility. Adding it to the liquid crystal composition helps to further reduce the rotational viscosity of the liquid crystal composition by combining with the compounds shown in the general formulas I to IV.

[0051] As a preferred technical solution of the present invention, R8 is selected from any one of a straight-chain alkyl group with 1 to 5 carbon atoms or a straight-chain alkenyl group with 2 to 5 carbon atoms.

[0052] As a preferred technical solution of the present invention, R9 is selected from any one of a straight-chain alkyl group with 1 to 5 carbon atoms or a straight-chain alkenyl group with 2 to 5 carbon atoms.

[0053] In the present invention, the alkyl group of 1-5 carbon atoms may be methyl, ethyl, propyl, butyl or pentyl, and the alkenyl group of 2-5 carbon atoms may be vinyl, propenyl, butenyl or pentenyl, and may be a terminal alkenyl or a non-terminal alkenyl.

[0054] As a preferred technical solution of the present invention, the compound with the structure represented by the general formula V is selected from any one of the following compounds:

[0055]

[0056]

[0057] As a preferred technical solution of the present invention, based on the total mass of the liquid crystal composition as 100%, the content of the compound of the structure represented by the general formula V is 0.1-15%, for example, 0.1%, 0.5%, 1%, 2%, 3%, 3.2%, 3.5%, 3.8%, 4%, 4.2%, 4.5%, 4.8%, 5%, 5.2%, 5.5%, 6%, 8%, 10%, 12%, 14%, 15%, etc.

[0058] When the compound of the structure shown in Formula V is within the content range defined in the present invention, it is more beneficial to improve the response time of the liquid crystal display.

[0059] As a preferred technical solution of the present invention, based on the total mass of the liquid crystal composition being 100%, the content of the compound having the structure represented by the general formula V is 0.1-10%, and more preferably 5-8%.

[0060] As a preferred technical solution of the present invention, the liquid crystal composition further comprises one or more compounds of the structure shown in general formula VI:

[0061]

[0062] Among them, R 10 , R 11 Each is independently selected from any one of an alkyl group or an alkoxy group having 1 to 7 carbon atoms.

[0063] The compound represented by the general formula VI provided by the present invention is a quaternary compound, which has the function of improving high temperature reliability. Its addition to the liquid crystal composition helps to further improve the high temperature reliability of the liquid crystal composition by combining with the compounds represented by the general formulas I to V.

[0064] As a preferred technical solution of the present invention, R 10 Selected from straight chain alkyl groups of 2 to 4 carbon atoms.

[0065] As a preferred technical solution of the present invention, R 11 Selected from straight chain alkyl groups of 1 to 5 carbon atoms.

[0066] In the present invention, the alkyl group of 1 to 5 carbon atoms may be a methyl group, an ethyl group, a propyl group, a butyl group or a pentyl group.

[0067] As a preferred technical solution of the present invention, the compound with the structure represented by the general formula VI is selected from any one of the following compounds:

[0068]

[0069] As a preferred technical solution of the present invention, based on the total mass of the liquid crystal composition as 100%, the content of the compound with the structure represented by the general formula VI is 0.1-10%, for example, 0.1%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, etc.

[0070] As a preferred technical solution of the present invention, based on the total mass of the liquid crystal composition as 100%, the content of the compound with the structure represented by general formula VI is 0.1-5%, preferably 0.1-3%, more preferably 0.1-1%, and most preferably 0.5-1%.

[0071] When the compound of the structure represented by formula VI of the present invention is within the above-mentioned limited content range, it is more conducive to improving the response time of the liquid crystal display.

[0072] The present invention has no special restrictions on the preparation method of the liquid crystal composition. It can be produced by mixing two or more compounds in a conventional manner, such as preparing it by mixing different components at high temperature and dissolving them in each other, wherein the liquid crystal composition is dissolved in an organic solvent and mixed, and then the solvent is distilled off under reduced pressure; or the liquid crystal composition of the present invention can be prepared according to conventional methods, such as dissolving a component with a smaller content in a main component with a larger content at a higher temperature, or dissolving each component in an organic solvent, such as acetone, chloroform or methanol, and then mixing the solutions to remove the solvent to obtain the liquid crystal composition.

[0073] In a second aspect, the present invention provides an application of the liquid crystal composition described in the first aspect in the field of liquid crystal display.

[0074] As a preferred technical solution of the present invention, the application of the liquid crystal composition in a VA, IPS or FFS mode liquid crystal display is further preferably applied in an IPS or FFS mode liquid crystal display.

[0075] The liquid crystal composition provided by the present invention can be used for fast-response liquid crystal displays of various display modes. Its use in VA, IPS or FFS mode displays can significantly improve the display effect of the liquid crystal display, and is particularly suitable for IPS and FFS mode liquid crystal displays.

[0076] The technical solution provided by the embodiment of the present invention has the following advantages compared with the prior art:

[0077] 1. The liquid crystal composition provided by the present invention has excellent properties such as low rotational viscosity, large elastic constant, large optical anisotropy, fast response speed and good low-temperature miscibility, and can effectively improve the response speed of liquid crystal displays.

[0078] 2. The liquid crystal composition provided by the present invention can be used for fast-response liquid crystal displays in various display modes. Its use in VA, IPS or FFS mode displays can significantly improve the display effect of the liquid crystal display, and is particularly suitable for IPS and FFS mode liquid crystal displays. DETAILED DESCRIPTION

[0079] In order to more clearly understand the above-mentioned objectives, features and advantages of the present invention, the scheme of the present invention will be further described below. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0080] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present invention, rather than all of the embodiments.

[0081] In the following examples, the raw materials used can be obtained from public commercial sources unless otherwise specified. Unless otherwise specified, the percentages in the present invention are weight percentages; the temperature unit is ° C.

[0082] Examples 1-6

[0083] This embodiment provides a liquid crystal composition and a preparation method thereof. The specific composition of the liquid crystal composition is shown in Table 1:

[0084] Table 1

[0085]

[0086]

[0087] The preparation method adopts a thermal dissolution method and comprises the following steps:

[0088] The component compounds are weighed on a balance according to the mass percentage. There is no specific requirement for the weighing and adding order. Usually, the liquid crystal compounds are weighed and mixed in descending order of melting point. The components are heated and stirred at 60-100° C. to dissolve evenly. The components are then filtered and finally packaged to obtain the liquid crystal composition.

[0089] Embodiment 7-8

[0090] This embodiment provides a liquid crystal composition and a preparation method thereof. The preparation method is the same as that of Embodiment 1. The specific composition of the liquid crystal composition is shown in Table 2:

[0091] Table 2

[0092]

[0093]

[0094] Examples 9-14

[0095] This embodiment provides a liquid crystal composition and a preparation method thereof. The preparation method is the same as that of Embodiment 1. The specific composition of the liquid crystal composition is shown in Table 3:

[0096] Table 3

[0097]

[0098] Comparative Example 1

[0099] This comparative example provides a liquid crystal composition and a preparation method thereof. The preparation method is the same as that of Example 1. The specific composition of the liquid crystal composition is shown in Table 4:

[0100] Table 4

[0101]

[0102]

[0103] Comparative Example 2

[0104] This comparative example provides a liquid crystal composition and a preparation method thereof. The preparation method is the same as that of Example 1. The specific composition of the liquid crystal composition is shown in Table 5:

[0105] Table 5

[0106]

[0107] Performance Testing

[0108] The performance of the liquid crystal compositions prepared in the examples and comparative examples was tested.

[0109] Δn represents optical anisotropy (25°C); Δε represents dielectric anisotropy (25°C, 1000 Hz); γ1 represents rotational viscosity (mPa·s, 25°C); Cp represents the clearing point of the liquid crystal composition (°C); K 11 , K 33 represent the splay and bending elastic constants (pN, 25°C), respectively.

[0110] The test method is as follows:

[0111] Δn: Use DR-M2 Abbe refractometer, evenly apply the alignment agent on the glass surface of the refractometer, then add liquid crystal to align the liquid crystal molecules vertically, measure ne and no, and obtain Δn.

[0112] Cp: ​​Place the test box filled with liquid crystal into the Instec microthermal analyzer and heat it at a fixed rate. The observed phase transition temperature is the Cp.

[0113] Δε、K 11 , K 33 , γ1: The liquid crystal CV curve was measured using the Instec PP1 physical parameter tester, and Δε, K were calculated 11 , K 33 , γ1 and other parameters.

[0114] The results are shown in Table 6:

[0115] Table 6

[0116] project Δn Δε Cp γ1 K11 K33 γ1 / K11 Example 1 0.108 -3.84 80.1 85.5 14.60 14.73 5.86 Example 2 0.108 -3.75 80.1 83.5 14.31 14.54 5.83 Example 3 0.108 -3.73 80.9 84.4 14.66 14.88 5.75 Example 4 0.107 -3.81 74.7 79.8 14.21 14.34 5.61 Example 5 0.108 -3.81 79.7 87.8 14.74 14.07 5.95 Example 6 0.104 -4.09 80.9 79.03 15.00 14.08 5.26 Example 7 0.103 -3.52 113.4 142.9 24.82 22.67 5.75 Example 8 0.103 -3.44 111.8 139.7 24.60 21.94 5.68 Example 9 0.087 -2.35 87.7 70.4 16.96 17.07 4.15 Example 10 0.091 -2.77 85.0 77.6 16.86 17.17 4.56 Embodiment 11 0.088 -2.37 86.6 72.3 17.09 17.17 4.23 Example 12 0.094 -2.91 78.6 57.7 15.44 14.55 3.73 Example 13 0.092 -2.86 79.7 60.1 15.88 15.04 3.78 Embodiment 14 0.092 -2.95 80.4 62.5 15.64 16.75 3.99 Comparative Example 1 0.108 -3.76 79.7 94.5 14.01 15.65 6.74 Comparative Example 2 0.087 -2.38 87.0 84.2 16.25 17.88 5.16

[0117] It can be found from the above table that, compared with Comparative Example 1, the dielectric anisotropy (Δε), clearing point (Cp), and optical anisotropy (Δn) of the liquid crystal compositions of Examples 1-6 are not much different. In this case, the liquid crystal mixtures provided in the examples have a smaller γ1 / K11, and the same is true for Examples 9-14 compared with Comparative Example 2, that is, the liquid crystal compositions provided by the present invention have higher contrast and faster response speed.

[0118] Compared with the embodiments, comparative examples 1 and 2 reduce the compound represented by general formula I, and the embodiments have a larger elastic constant and a lower rotational viscosity than the comparative examples, that is, there is a synergistic relationship between the components in the liquid crystal composition provided by the present invention, and the compound represented by general formula I is one of the indispensable components in the liquid crystal composition provided by the present invention.

[0119] From the above examples, it can be seen that the liquid crystal composition provided by the present invention has a large elastic constant, suitable optical anisotropy, good low-temperature miscibility, low rotational viscosity, and excellent light stability and thermal stability, which can reduce the response time of the liquid crystal display, thereby solving the problem of slow response speed of the liquid crystal display. Therefore, the liquid crystal composition provided by the present invention is suitable for fast-response VA, IPS and FFS type TFT liquid crystal display devices, especially for IPS and FFS liquid crystal display devices.

[0120] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0121] The above description is only a specific embodiment of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments described herein, but should conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A liquid crystal composition, characterized in that: The liquid crystal composition comprises one or more compounds of the structure shown in general formula I, one or more compounds of the structure shown in general formula II, one or more compounds of the structure shown in general formula III, and one or more compounds of the structure shown in general formula IV; in, Wherein, R1 is selected from any one of an alkyl group of 1 to 7 carbon atoms or an alkenyl group of 2 to 7 carbon atoms; Wherein, R2 and R3 are each independently selected from any one of an alkyl or alkoxy group having 1 to 7 carbon atoms, and an alkenyl group having 2 to 7 carbon atoms; Wherein, R4 and R5 are each independently selected from any one of an alkyl or alkoxy group having 1 to 7 carbon atoms, and an alkenyl group having 2 to 7 carbon atoms, Selected from Wherein, R6 and R7 are each independently selected from any one of an alkyl or alkoxy group having 1 to 7 carbon atoms, and an alkenyl group having 2 to 7 carbon atoms, Selected from 2. The liquid crystal composition according to claim 1, characterized in that: The compound of the structure shown in general formula I is selected from any one of the following compounds: And / or, the compound having the structure shown in general formula II is selected from any one of the following compounds:

3. The liquid crystal composition according to claim 1 or 2, characterized in that: The compound of the structure shown in general formula III is selected from any one of the following compounds:

4. The liquid crystal composition according to any one of claims 1 to 3, characterized in that: The compound represented by the general formula IV is selected from any one of the following compounds:

5. The liquid crystal composition according to any one of claims 1 to 4, characterized in that: Based on the total mass of the liquid crystal composition as 100%, the content of the compound of the structure represented by general formula I is 1-20%, the content of the compound of the structure represented by general formula II is 1-60%, the content of the compound of the structure represented by general formula III is 1-50%, and the content of the compound of the structure represented by general formula IV is 1-30%; Preferably, based on the total mass of the liquid crystal composition as 100%, the content of the compound of the structure represented by general formula I is 1-15%, the content of the compound of the structure represented by general formula II is 20-55%, the content of the compound of the structure represented by general formula III is 10-50%, and the content of the compound of the structure represented by general formula IV is 1-20%; Preferably, based on the total mass of the liquid crystal composition as 100%, the content of the compound of the structure represented by general formula I is 5-15%, the content of the compound of the structure represented by general formula II is 30-55%, the content of the compound of the structure represented by general formula III is 25-50%, and the content of the compound of the structure represented by general formula IV is 5-20%; Preferably, based on the total mass of the liquid crystal composition as 100%, the content of the compound with the structure shown in general formula I is 10-15%, the content of the compound with the structure shown in general formula II is 30-55%, the content of the compound with the structure shown in general formula III is 25-40%, and the content of the compound with the structure shown in general formula IV is 5-15%.

6. The liquid crystal composition according to any one of claims 1 to 5, characterized in that: The liquid crystal composition further comprises one or more compounds of the structure shown in general formula V: Wherein, R8 and R9 are each independently selected from any one of an alkyl group of 1 to 7 carbon atoms or an alkenyl group of 2 to 7 carbon atoms; Preferably, the compound of the structure represented by the general formula V is selected from any one of the following compounds:

7. The liquid crystal composition according to claim 6, characterized in that: Based on the total mass of the liquid crystal composition being 100%, the content of the compound having the structure represented by the general formula V is 0.1-15%, preferably 0.1-10%, and more preferably 5-8%.

8. The liquid crystal composition according to any one of claims 1 to 7, characterized in that: The liquid crystal composition further comprises one or more compounds of the structure shown in general formula VI: Among them, R 10 , R 11 Each independently selected from any one of an alkyl group or an alkoxy group having 1 to 7 carbon atoms; Preferably, the compound having the structure represented by the general formula VI is selected from any one of the following compounds:

9. The liquid crystal composition according to claim 8, characterized in that: Based on the total mass of the liquid crystal composition as 100%, the content of the compound having the structure represented by the general formula VI is 0.1-10%, preferably 0.1-5%, further preferably 0.1-3%, more preferably 0.1-1%, and most preferably 0.5-1%.

10. Use of the liquid crystal composition according to any one of claims 1 to 9 in the field of liquid crystal display.

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