Liquid crystal composition and application thereof

Abstract

The invention relates to the technical field of liquid crystal display, in particular to a liquid crystal composition and application thereof. The liquid crystal composition provided by the invention has the advantages of high elastic constant, low rotary viscosity, high response speed, high optical anisotropy, good low-temperature intersolubility and other excellent performances, can be used for liquid crystal display of various display modes, can realize high contrast and quick response, and has wide application prospects. When the liquid crystal composition is applied to 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 field of liquid crystal display technology, and in particular to a liquid crystal composition and applications thereof. Background Art

[0002] At present, LCD displays, as the most mainstream displays, have been widely used in various products. Among them, IPS and FFS mode displays are widely used in mobile phones, computers, TVs, etc. because of their unique hard screen characteristics and very wide viewing angle characteristics.

[0003] The planar arrangement of IPS and FFS liquid crystals leads to light leakage in the dark state, significantly inferior to VA-type displays (MVA, PVA, UV2A, PSVA) in terms of contrast performance. Research has found that during the initial alignment of liquid crystal molecules, surface defects in the alignment layer can cause disorder in the liquid crystal molecules, leading to dark-state light leakage. Improving this disordered liquid crystal alignment is a key issue in improving the contrast of IPS and FFS displays.

[0004] Research has found that increasing the elastic constant of liquid crystals helps improve the arrangement of liquid crystal molecules. It is well known in the art that increasing the clearing point of a liquid crystal composition can achieve the purpose of increasing the elastic constant. However, the increase in the clearing point usually leads to an increase in the rotational viscosity, which in turn causes the response time of the liquid crystal display to become longer.

[0005] Therefore, it is of great significance to provide a liquid crystal composition having a large elastic constant and a low rotational viscosity. Summary of the Invention

[0006] 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 a large elastic constant, a low rotational viscosity and a fast response speed, and also has excellent properties such as large optical anisotropy and good low-temperature miscibility. It can be used for liquid crystal displays in various display modes, can achieve high contrast and fast response, and can significantly improve the display effect of the liquid crystal display when applied to VA, IPS or FFS mode displays, and is particularly suitable for IPS and FFS mode liquid crystal displays.

[0007] In a first aspect, the present invention provides a liquid crystal composition comprising one or more compounds of formula I, one or more compounds of formula II, and one or more compounds of formula III;

[0008] in,

[0009]

[0010] wherein R1 and R2 are each independently selected from any one of an alkyl group of 1 to 10 carbon atoms or an alkenyl group of 2 to 7 carbon atoms, the alkyl group is an alkyl group substituted or unsubstituted with a fluorine atom, and the alkenyl group is an alkenyl group substituted or unsubstituted with a fluorine atom;

[0011]

[0012] wherein R3 and R4 are each independently selected from any one of an alkyl group having 1 to 7 carbon atoms, an alkoxy group having 1 to 7 carbon atoms, an alkenyl group having 2 to 7 carbon atoms, or an alkenyloxy group having 2 to 7 carbon atoms;

[0013]

[0014] wherein R5 and R6 are each independently selected from any one of an alkyl group having 1 to 7 carbon atoms, an alkoxy group having 1 to 7 carbon atoms, an alkenyl group having 2 to 7 carbon atoms, or an alkenyloxy group having 2 to 7 carbon atoms, Selected from Any one or more of, -* represents the connecting bond of the group.

[0015] Among them, the 1-10 can be 1, 2, 4, 6, 8, 10, etc., the 1-7 can be 1, 2, 4, 7, etc., and the 2-7 can be 2, 4, 6, 7, etc.

[0016] The liquid crystal composition provided by the present invention has a large elastic constant, a low rotational viscosity, a fast response speed, and excellent properties such as large optical anisotropy and good low-temperature miscibility. It can be used in liquid crystal displays of various display modes, can achieve high contrast and fast response, and can significantly improve the display effect of liquid crystal displays when applied to VA, IPS or FFS mode displays. It is particularly suitable for IPS and FFS mode liquid crystal displays. Specifically:

[0017] The liquid crystal composition provided by the present invention includes one or more compounds represented by general formula I, one or more compounds represented by general formula II, and one or more compounds represented by general formula III, wherein the compound represented by general formula I is a large dielectric negative liquid crystal monomer that can significantly reduce the driving voltage, the compound represented by general formula II is a compound having a bicyclohexane structure and has good low-temperature solubility, and the compound represented by general formula III is a neutral compound containing a tricyclic structure and has a high clearing point and a large elastic constant. The synergistic effect of the three can increase the elastic constant of the liquid crystal composition while reducing the rotational viscosity, thereby effectively improving the contrast and response time of the liquid crystal display when applied to the liquid crystal display, and 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.

[0018] As a preferred technical solution of the present invention, the compound represented by the general formula I is selected from any one or more of the following compounds IA1-IA22, IB1-IB20:

[0019]

[0020]

[0021] In the present invention, unless otherwise specified, “-C n H 2n+1 " represents an alkyl group (e.g., -C3H7, -C4H9, -C5H 11 etc.), all refer to straight-chain alkyl groups.

[0022] As a preferred technical solution of the present invention, the compound represented by the general formula II is selected from any one or more of the following compounds IIA1-IIA12, IIB1-IIB14:

[0023]

[0024] As a preferred technical solution of the present invention, the compound represented by the general formula III is selected from any one or more of the following compounds IIIA1-IIIA48, IIIB1-IIIB48, and IIIC1-IIIC48:

[0025]

[0026]

[0027]

[0028]

[0029] As a preferred technical solution of the present invention, the mass ratio of the compound represented by general formula I, the compound represented by general formula II and the compound represented by general formula III in the liquid crystal composition is (1-30):(20-60):(1-30), for example, 1:20:1, 10:40:10, 20:50:20, 30:60:30, 5:40:20, 10:30:25, 15:20:20, etc.

[0030] As a preferred technical solution of the present invention, the liquid crystal composition further comprises one or more compounds represented by general formula IV:

[0031]

[0032] Wherein, R7 and R8 are each independently selected from an alkyl group of 1 to 7 carbon atoms or an alkoxy group of 1 to 7 carbon atoms, m is 1 or 2, Selected from Any one or more of, and m in general formula IV Independent of each other, -* represents the connecting bond of the group.

[0033] The compound represented by the general formula IV provided by the present invention has negative dielectric anisotropy and can further improve the dielectric anisotropy of the liquid crystal composition.

[0034] As a preferred technical solution of the present invention, the compound represented by the general formula IV is selected from any one or more of the following compounds IVA1-IVA24, IVB1-IVB24, IVC1-IVC24, IFD1-IVD24, IVE1-IVE24, and IFF1-IVF24:

[0035]

[0036]

[0037]

[0038]

[0039]

[0040]

[0041] 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 represented by general formula I is 1-30%, the content of the compound represented by general formula II is 20-60%, the content of the compound represented by general formula III is 1-30%, and the content of the compound represented by general formula IV is 10-50%.

[0042] When the content of each component in the liquid crystal composition is within the above range, a more significant synergistic effect can be achieved between the components, thereby effectively improving the comprehensive application performance of the liquid crystal composition.

[0043] 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 represented by general formula I is 5-25%, the content of the compound represented by general formula II is 30-50%, the content of the compound represented by general formula III is 10-30%, and the content of the compound represented by general formula IV is 20-45%.

[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 represented by general formula I is 5-20%, the content of the compound represented by general formula II is 40-50%, the content of the compound represented by general formula III is 10-25%, and the content of the compound represented by general formula IV is 30-45%.

[0045] As a preferred technical solution of the present invention, the liquid crystal composition further comprises one or more compounds represented by general formula V:

[0046]

[0047] Among them, R9 and R 10 Each is independently selected from any one of an alkyl group having 1 to 7 carbon atoms, an alkoxy group having 1 to 7 carbon atoms, or an alkenyl group having 2 to 7 carbon atoms, and n is 1 or 2.

[0048] The compound represented by the general formula V provided by the present invention is a compound having a methoxy bridge structure, which cooperates with other components to further improve the dielectric anisotropy of the liquid crystal composition.

[0049] As a preferred technical solution of the present invention, the compound represented by the general formula V is selected from any one or more of the following compounds VA1-VA12, VB1-VB12, VC1-VC12, and DD1-DD12:

[0050]

[0051]

[0052] 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 represented by general formula I is 1-30%, the content of the compound represented by general formula II is 20-60%, the content of the compound represented by general formula III is 1-30%, and the content of the compound represented by general formula V is 10-40%.

[0053] When the content of each component in the liquid crystal composition is within the above range, a more significant synergistic effect can be achieved between the components, thereby effectively improving the comprehensive application performance of the liquid crystal composition.

[0054] 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 represented by general formula I is 5-25%, the content of the compound represented by general formula II is 30-55%, the content of the compound represented by general formula III is 10-30%, and the content of the compound represented by general formula V is 20-40%.

[0055] 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 represented by general formula I is 5-20%, the content of the compound represented by general formula II is 40-55%, the content of the compound represented by general formula III is 10-25%, and the content of the compound represented by general formula V is 20-30%.

[0056] The present invention does not impose any particular restrictions on the preparation method of the liquid crystal composition. It can be produced by mixing two or more compounds using conventional methods, such as by mixing different components at high temperature and dissolving them in each other, wherein the liquid crystal composition is dissolved in a solvent for the compound 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.

[0057] 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, preferably in a VA, IPS or FFS mode display.

[0058] The technical solution provided by the embodiment of the present invention has the following advantages compared with the existing technology:

[0059] The liquid crystal composition provided by the present invention has a large elastic constant, a low rotational viscosity, a fast response speed, and excellent properties such as large optical anisotropy and good low-temperature miscibility. It can be used in liquid crystal displays of various display modes, can achieve high contrast and fast response, and can significantly improve the display effect of liquid crystal displays when applied to VA, IPS or FFS mode displays. It is particularly suitable for IPS and FFS mode liquid crystal displays. DETAILED DESCRIPTION

[0060] 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, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0061] 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 the embodiments.

[0062] Example 1

[0063] This embodiment provides a liquid crystal composition and a preparation method thereof. The components and contents of the liquid crystal composition are shown in Table 1:

[0064] Table 1

[0065]

[0066]

[0067] The preparation method comprises: weighing the liquid crystal compounds by weight percentage using a balance, wherein there is no specific requirement for the weighing and adding order, and the liquid crystal compounds are usually weighed and mixed in descending order of melting point, heating and stirring at 60-100° C. to make the components melt evenly, then filtering, rotary evaporating, and finally packaging to obtain the product.

[0068] Example 2

[0069] This embodiment provides a liquid crystal composition and a preparation method thereof. The preparation method is the same as that of Example 1. The components and contents of the liquid crystal composition are shown in Table 2:

[0070] Table 2

[0071]

[0072]

[0073] Example 3

[0074] This embodiment provides a liquid crystal composition and a preparation method thereof. The preparation method is the same as that of Example 1. The components and their contents in the liquid crystal composition are shown in Table 3:

[0075] Table 3

[0076] Compound content / % ⅠB19 4 ⅠA10 6 ⅡA1 20 ⅡA2 4 ⅡA4 8 ⅡB11 10 ⅢA6 6 ⅢA2 8 ⅣA14 12 ⅣD10 6 ⅣD14 6 ⅣD16 5 ⅣD13 5

[0077] Example 4

[0078] This embodiment provides a liquid crystal composition and a preparation method thereof. The preparation method is the same as that of Example 1. The components and their contents in the liquid crystal composition are shown in Table 4:

[0079] Table 4

[0080] Compound content / % ⅠA14 4 ⅠA10 6 ⅡA1 21 ⅡA2 4 ⅡA4 8 ⅡB11 10 ⅢA6 6 ⅢA2 8 ⅣA14 11 ⅣD10 6 ⅣC14 6 ⅣE14 4 ⅣD18 6

[0081] Example 5

[0082] This embodiment provides a liquid crystal composition and a preparation method thereof. The preparation method is the same as that of Example 1. The components and their contents in the liquid crystal composition are shown in Table 5:

[0083] Table 5

[0084]

[0085]

[0086] Example 6

[0087] This embodiment provides a liquid crystal composition and a preparation method thereof. The preparation method is the same as that of Example 1. The components and their contents in the liquid crystal composition are shown in Table 6:

[0088] Table 6

[0089] Compound content / % ⅠA10 5 ⅠA11 6 ⅡA1 25 ⅡA2 8 ⅡA4 8 ⅡB11 8 ⅢB2 10 ⅢB25 6 ⅤA7 9 ⅤC7 15

[0090] Example 7

[0091] This embodiment provides a liquid crystal composition and a preparation method thereof. The preparation method is the same as that of Example 1. The components and their contents in the liquid crystal composition are shown in Table 7:

[0092] Table 7

[0093]

[0094]

[0095] Example 8

[0096] This embodiment provides a liquid crystal composition and a preparation method thereof. The preparation method is the same as that of Example 1. The components and their contents in the liquid crystal composition are shown in Table 8:

[0097] Table 8

[0098] Compound content / % ⅠA10 5 ⅠB8 5 ⅡA1 22.5 ⅡA2 8 ⅡA4 8 ⅡB11 10 ⅢB2 10 ⅢB6 7 ⅤC7 15 ⅤA7 9.5

[0099] Example 9

[0100] This embodiment provides a liquid crystal composition and a preparation method thereof. The preparation method is the same as that of Example 1. The components and contents of the liquid crystal composition are shown in Table 9:

[0101] Table 9

[0102] Compound content / % ⅠA3 6 ⅠB8 4 ⅡA1 23 ⅡA2 8 ⅡA4 8 ⅡB11 10 ⅢB2 5 ⅢB6 7 ⅢB8 5 ⅤA11 9 ⅤC7 15

[0103] Example 10

[0104] This embodiment provides a liquid crystal composition and a preparation method thereof. The preparation method is the same as that of Example 1. The components and contents of the liquid crystal composition are shown in Table 10:

[0105] Table 10

[0106]

[0107]

[0108] Example 11

[0109] This embodiment provides a liquid crystal composition and a preparation method thereof. The preparation method is the same as that of Example 1. The components and contents of the liquid crystal composition are shown in Table 11:

[0110] Table 11

[0111] Compound content / % ⅠA3 5 ⅠA8 5 ⅠA9 5 ⅠB4 5 ⅠB10 5 ⅡA1 15 ⅡA2 3 ⅡB6 2 ⅡA4 5 ⅡB10 10 ⅡB11 10 ⅢA25 10 ⅢA2 8 ⅢB6 3 ⅢA6 8 ⅢC6 1

[0112] Example 12

[0113] This embodiment provides a liquid crystal composition and a preparation method thereof. The preparation method is the same as that of Example 1. The components and contents of the liquid crystal composition are shown in Table 12:

[0114] Table 12

[0115] Compound content / % ⅠA6 5 ⅡA1 20 ⅡA2 5 ⅡA4 5 ⅡB10 5 ⅡB11 5 ⅢA2 5 ⅢB6 5 ⅣA6 14 ⅣB7 2 ⅣC8 10 ⅣD3 6 ⅣE10 2 ⅣF5 1 ⅣC5 6 ⅣC9 4

[0116] Example 13

[0117] This embodiment provides a liquid crystal composition and a preparation method thereof. The preparation method is the same as that of Example 1. The components and contents of the liquid crystal composition are shown in Table 13:

[0118] Table 13

[0119]

[0120]

[0121] Comparative Example 1

[0122] 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 components and contents of the liquid crystal composition are shown in Table 14:

[0123] Table 14

[0124] Compound Weight percentage (%) ⅠA10 0 ⅠA11 0 ⅡA1 22.2 ⅡA2 4.4 ⅡA4 8.9 ⅡB11 11.1 ⅢB2 8.9 ⅢB6 6.7 ⅣA14 7.8 ⅣA16 6.7 ⅣC13 11.1 ⅣC14 6.7 ⅣC10 5.5

[0125] Comparative Example 2

[0126] 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 components and contents of the liquid crystal composition are shown in Table 15:

[0127] Table 15

[0128] Compound content / % ⅠA3 0 ⅠA19 0 ⅡA1 26.3 ⅡA2 8.9 ⅡA4 8.9 ⅡB11 10 ⅢB2 10 ⅢB8 8.9 ⅤA3 10.3 ⅤC3 16.7

[0129] Comparative Example 3

[0130] 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 components and contents of the liquid crystal composition are shown in Table 16:

[0131] Table 16

[0132]

[0133]

[0134] Performance Testing

[0135] The liquid crystal compositions obtained in the examples and comparative examples were tested:

[0136] Δn represents the optical anisotropy (25°C, wavelength: 589 nm), which was measured using an Abbe refractometer; Δε represents the dielectric anisotropy (25°C, 1000 Hz), which was measured using an INSTEC liquid crystal detection instrument; γ1 represents the rotational viscosity (mPa.s, 25°C), which was measured using a viscometer; Cp represents the clearing point of the liquid crystal composition (°C), which was measured using a polarizing microscope; K 11 , K 22 , K 33 Represents the flexural, torsion and bending elastic constants (pN, 25°C), respectively, and was tested using an Instec physical property measuring instrument. The results are shown in Table 17:

[0137] Table 17

[0138]

[0139]

[0140] In the FFS display mode, 1. Response time: The liquid crystal response time is proportional to the rotational viscosity (γ1) and inversely proportional to the elastic constant (K11). That is, the response time can be characterized by γ1 / K11. The smaller γ1 / K11 is, the faster the response time is. 2. Transmittance: The liquid crystal transmittance is proportional to the delay amount (Δnd). That is, the larger Δnd is, the higher the transmittance is. 3. Contrast: The liquid crystal contrast is proportional to the elastic constant (K11). That is, the larger K11 is, the higher the contrast is. 4. Driving voltage: The liquid crystal driving voltage is inversely proportional to the dielectric anisotropy constant (Δε). That is, the smaller Δε is, the higher the driving voltage is.

[0141] From the results in Table 17, it can be found that the γ1 / K11 of the embodiment of the present invention and the comparative example 1-2 are basically at the same level, indicating that the response time is basically the same, but the Δnd, Δε and K11 of the embodiment 1-13 are larger than those of the comparative example 1-2, indicating that the transmittance of the embodiment 1-13 is higher than that of the comparative example 1-2, the driving voltage is lower, and the contrast is higher, so it is more energy-efficient in application and the contrast of the display is also higher. The Δnd and Δε of the embodiment of the present invention and the comparative example 3 are basically at the same level, indicating that their transmittance is consistent with the driving voltage, but the K11 of the embodiment is larger and the γ1 / K11 is smaller, indicating that the contrast of the embodiment of the present invention is higher than that of the comparative example 3 and the response speed is faster. It shows that the lack of the compound represented by general formula I in the liquid crystal composition will lead to deterioration of display performance (such as response time, transmittance, contrast, and driving voltage). The compound represented by general formula I is an indispensable component, and the components are inseparable and act synergistically.

[0142] In summary, the liquid crystal composition provided by the present invention has a large elastic constant, high resistivity, suitable optical anisotropy, good low-temperature miscibility, low rotational viscosity, and excellent light and thermal stability. It can reduce the response time of liquid crystal displays, thereby solving the problem of slow response speed of liquid crystal displays. Therefore, the liquid crystal composition provided by the present invention is suitable for fast-response, high-contrast VA, IPS, and FFS type TFT liquid crystal displays, and is particularly suitable for IPS and FFS liquid crystal displays.

[0143] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0144] The foregoing description is intended only to provide specific embodiments of the present invention, which will enable those skilled in the art to understand and implement the present invention. Various modifications to these embodiments will be readily 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 is not intended to be limited to the embodiments described herein, but is to be construed in the widest manner 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 represented by general formula I, one or more compounds represented by general formula II, and one or more compounds represented by general formula III; in, wherein R1 and R2 are each independently selected from any one of an alkyl group of 1 to 10 carbon atoms or an alkenyl group of 2 to 7 carbon atoms, the alkyl group is an alkyl group substituted or unsubstituted with a fluorine atom, and the alkenyl group is an alkenyl group substituted or unsubstituted with a fluorine atom; wherein R3 and R4 are each independently selected from any one of an alkyl group having 1 to 7 carbon atoms, an alkoxy group having 1 to 7 carbon atoms, an alkenyl group having 2 to 7 carbon atoms, or an alkenyloxy group having 2 to 7 carbon atoms; wherein R5 and R6 are each independently selected from any one of an alkyl group having 1 to 7 carbon atoms, an alkoxy group having 1 to 7 carbon atoms, an alkenyl group having 2 to 7 carbon atoms, or an alkenyloxy group having 2 to 7 carbon atoms, Selected from Any one or more of, -* represents the connecting bond of the group.

2. The liquid crystal composition according to claim 1, wherein The compound represented by the general formula I is selected from any one or more of the following compounds:

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

5. The liquid crystal composition according to any one of claims 1 to 4, characterized in that: The mass ratio of the compound represented by general formula I, the compound represented by general formula II and the compound represented by general formula III in the liquid crystal composition is (1-30):(20-60):(1-30).

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 represented by the general formula IV: Wherein, R7 and R8 are each independently selected from an alkyl group of 1 to 7 carbon atoms or an alkoxy group of 1 to 7 carbon atoms, m is 1 or 2, Selected from Any one or more of, and m in general formula IV Independent of each other, -* represents the connecting bond of the group; Preferably, the compound represented by the general formula IV is selected from any one or more of the following compounds:

7. The liquid crystal composition according to claim 6, wherein Based on the total mass of the liquid crystal composition as 100%, the content of the compound represented by general formula I is 1-30%, the content of the compound represented by general formula II is 20-60%, the content of the compound represented by general formula III is 1-30%, and the content of the compound represented by general formula IV is 10-50%; Preferably, based on the total mass of the liquid crystal composition as 100%, the content of the compound represented by general formula I is 5-25%, the content of the compound represented by general formula II is 30-50%, the content of the compound represented by general formula III is 10-30%, and the content of the compound represented by general formula IV is 20-45%; Preferably, based on the total mass of the liquid crystal composition as 100%, the content of the compound represented by general formula I is 5-20%, the content of the compound represented by general formula II is 40-50%, the content of the compound represented by general formula III is 10-25%, and the content of the compound represented by general formula IV is 30-45%.

8. 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 represented by general formula V: Among them, R9 and R 10 Each is independently selected from any one of an alkyl group of 1 to 7 carbon atoms, an alkoxy group of 1 to 7 carbon atoms, or an alkenyl group of 2 to 7 carbon atoms, and n is 1 or 2; Preferably, the compound represented by the general formula V is selected from any one or more 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 represented by general formula I is 1-30%, the content of the compound represented by general formula II is 20-60%, the content of the compound represented by general formula III is 1-30%, and the content of the compound represented by general formula V is 10-40%; Preferably, based on the total mass of the liquid crystal composition as 100%, the content of the compound represented by general formula I is 5-25%, the content of the compound represented by general formula II is 30-55%, the content of the compound represented by general formula III is 10-30%, and the content of the compound represented by general formula V is 20-40%; Preferably, based on the total mass of the liquid crystal composition as 100%, the content of the compound represented by general formula I is 5-20%, the content of the compound represented by general formula II is 40-55%, the content of the compound represented by general formula III is 10-25%, and the content of the compound represented by general formula V is 20-30%.

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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