A negative liquid crystal composition and use thereof

Abstract

The application provides a negative liquid crystal composition and application thereof, and belongs to the technical field of liquid crystal materials. The negative liquid crystal composition comprises at least one compound represented by a general formula I, at least one compound represented by a general formula II, at least one compound represented by a general formula III, at least one compound represented by a general formula IV and at least one compound represented by a general formula V. The negative liquid crystal composition provided by the application has low rotational viscosity, large elastic constant, small optical dispersion, good low-temperature mutual solubility, relatively high transmittance and fast response speed, can be used for fast response liquid crystal display of various display modes, improves the transmittance and contrast ratio, and is especially suitable for IPS and FFS mode liquid crystal displays.

Description

Technical Field

[0001] This invention belongs to the field of liquid crystal material technology, specifically relating to a negative liquid crystal composition and its application. Background Technology

[0002] With the advancement of the information age, liquid crystal display technology is also constantly developing. People have increasingly higher requirements for the performance of liquid crystal displays, which has also stimulated people's research interest in liquid crystal materials, making liquid crystal technology a hot topic and continuing to develop.

[0003] Currently, LCD monitors are developing towards larger sizes, wider viewing angles, higher contrast ratios, and faster response times, with the performance of negative liquid crystals playing a crucial role. Among them, IPS (In-Plane Switching) and FFS (Fringe Field Switching) monitors are widely used in mobile phones, laptops, tablets, computer monitors, and televisions due to their unique hard screen characteristics and very wide viewing angles. However, IPS and FFS displays, due to their unique liquid crystal planar alignment, are prone to light leakage in dark conditions, resulting in significantly inferior contrast performance compared to VA-type (MVA, PVA, UV2A, PSVA) monitors. Research has found that during the initial alignment of liquid crystal molecules, alignment defects on the surface of the alignment layer material can lead to disordered liquid crystal molecule alignment, resulting in light leakage in dark conditions. Therefore, improving the disordered liquid crystal alignment has become an important issue in improving IPS and FFS monitors. Research has shown that increasing the elastic constant of the liquid crystal helps improve the alignment of liquid crystal molecules.

[0004] For IPS and FFS mode displays, both positive (positive dielectric anisotropy) and negative (negative dielectric anisotropy) liquid crystals can be used. Because negative liquid crystal molecules align perpendicular to the electric field lines under the influence of an electric field, while positive liquid crystal molecules align along the electric field lines, negative liquid crystals have a greater retardation and higher transmittance. However, since different wavelengths of light have different transmittance through liquid crystal materials, and the greater the refractive index dispersion of the liquid crystal material, the lower the transmittance, this limits the improvement of the transmittance of negative liquid crystals. To further improve the transmittance of liquid crystals, it is necessary to address the significant difference in transmittance of liquid crystals under different wavelengths of light. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the present invention aims to provide a negative liquid crystal composition and its applications. This negative liquid crystal composition exhibits low dispersion under different wavelengths of light and high transmittance, thereby improving the contrast of liquid crystal displays.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] In a first aspect, the present invention provides a negative liquid crystal composition comprising at least one compound represented by general formula I, at least one compound represented by general formula II, at least one compound represented by general formula III, at least one compound represented by general formula IV and at least one compound represented by general formula V.

[0008]

[0009]

[0010] In the general formula I, R1 represents an alkyl group with 1-7 carbon atoms (e.g., 1, 2, 3, 4, 5, 6 or 7) or an alkenyl group with 2-7 carbon atoms (e.g., 2, 3, 4, 5, 6 or 7), and n represents 0, 1 or 2.

[0011] In the general formula II, R2 and R3 each independently represent an alkyl group with 1 to 7 carbon atoms (e.g., 1, 2, 3, 4, 5, 6 or 7), an alkoxy group with 1 to 7 carbon atoms (e.g., 1, 2, 3, 4, 5, 6 or 7), or an alkenyl group with 2 to 7 carbon atoms (e.g., 2, 3, 4, 5, 6 or 7).

[0012] In general formula III, R4 and R5 each independently represent an alkyl group with 1-7 carbon atoms (e.g., 1, 2, 3, 4, 5, 6, or 7), an alkoxy group with 1-7 carbon atoms (e.g., 1, 2, 3, 4, 5, 6, or 7), or an alkenyl group with 2-7 carbon atoms (e.g., 2, 3, 4, 5, 6, or 7), and m represents 1 or 2. represent And the m in general formula III They are independent of each other, where -* represents the linking bond of the groups;

[0013] In the general formula IV, R6 and R7 each independently represent an alkyl group with 1-7 carbon atoms (e.g., 1, 2, 3, 4, 5, 6 or 7), an alkoxy group with 1-7 carbon atoms (e.g., 1, 2, 3, 4, 5, 6 or 7), or an alkenyl group with 2-7 carbon atoms (e.g., 2, 3, 4, 5, 6 or 7).

[0014] In the general formula V, R8 and R9 each independently represent an alkyl group with 1-7 carbon atoms (e.g., 1, 2, 3, 4, 5, 6, or 7), an alkoxy group with 1-7 carbon atoms (e.g., 1, 2, 3, 4, 5, 6, or 7), or an alkenyl group with 2-7 carbon atoms (e.g., 2, 3, 4, 5, 6, or 7), and p represents 1 or 2. represent And the p elements in the general formula V They are independent of each other, where -* represents the linking bond of the groups.

[0015] In the liquid crystal composition provided by this invention, the compound represented by general formula I is a compound containing dibenzothiophene, which has a large dielectric constant and low rotational viscosity; the compound represented by general formula II is a dicyclohexane compound, which has low rotational viscosity and excellent miscibility, and is an essential component of fast-response liquid crystal displays; the compound represented by general formula III is a tricyclic neutral compound, which has a high clearing point and good low-temperature solubility, and can effectively improve the clearing point of the liquid crystal composition; the compound represented by general formula IV is a compound containing diacetylene, which has a large n... o and smaller n e Its refractive index (Δn=n e -n o The negative dielectric anisotropy, when combined with other liquid crystal components, can effectively reduce the dispersion of the liquid crystal composition, thereby improving transmittance and contrast. The compound represented by the general formula V has negative dielectric anisotropy; its addition to the liquid crystal composition can further enhance the dielectric anisotropy of the liquid crystal composition, reducing the driving voltage of the liquid crystal display. Through the synergistic effect of the above components, the resulting negative liquid crystal composition exhibits low rotational viscosity, high elastic constant, low optical dispersion, good low-temperature miscibility, high transmittance, and fast response speed.

[0016] In some embodiments of the present invention, in general formula I, R1 represents an alkyl group with 1-5 carbon atoms or a monoalkenyl group with 2-5 carbon atoms, and n represents 0 or 1.

[0017] In some embodiments of the present invention, the compound represented by general formula I includes one or more of the compounds represented by formulas IA1-IA12 and IB1-IB12.

[0018]

[0019] In some embodiments of the present invention, in general formula II, R2 and R3 each independently represent an alkyl group with 1-5 carbon atoms or a monoalkenyl group with 2-5 carbon atoms.

[0020] In some embodiments of the present invention, the compounds represented by general formula II include one or more of the compounds represented by formulas IIA1-IIA12, IIB1-IIB14 and IIC1-IIC4;

[0021]

[0022] In some embodiments of the present invention, in general formula III, R4 represents an alkyl group with 1-5 carbon atoms or a monoalkenyl group with 2-5 carbon atoms, R5 represents an alkyl group with 1-5 carbon atoms or an alkoxy group with 1-5 carbon atoms, and m is 1.

[0023] In some embodiments of the present invention, the compounds represented by general formula III include one or more of the compounds represented by formulas IIIA1-IIIA48, IIIB1-IIIB48 and IIIC1-IIIC48.

[0024]

[0025]

[0026]

[0027]

[0028]

[0029] In some embodiments of the present invention, in general formula IV, R6 and R7 each independently represent an alkyl group of 1-5 carbon atoms or an alkoxy group of 1-5 carbon atoms, or one of R6 and R7 represents an alkyl group of 1-5 carbon atoms and the other represents a monoalkenyl group of 2-5 carbon atoms.

[0030] In some embodiments of the present invention, the compound represented by general formula IV includes one or more of the compounds represented by formulas IVA1-IVA15, IVB1-IVB20 and IVC1-IVC15.

[0031]

[0032]

[0033]

[0034] In some embodiments of the present invention, in general formula V, R8 represents an alkyl group with 1-5 carbon atoms or a monoalkenyl group with 2-5 carbon atoms, and R9 represents an alkyl group with 1-5 carbon atoms or an alkoxy group with 1-5 carbon atoms.

[0035] In some embodiments of the present invention, the compounds represented by general formula V include one or more of the compounds represented by formulas VA1-VA48, VB1-VB48, VC1-VC48, VD1-VD48, VE1-VE48, VF1-VF48 and VG1-VG48.

[0036]

[0037]

[0038]

[0039]

[0040]

[0041]

[0042]

[0043]

[0044]

[0045]

[0046] In this invention, unless otherwise specified, "-C" refers to... n H 2n+1 " indicates an alkyl group (e.g., -C3H7, -C4H9, -C5H) 11 、) both refer to straight-chain alkyl groups.

[0047] In some embodiments of the present invention, the negative liquid crystal composition comprises the following components by mass percentage:

[0048] The compound represented by general formula I is 1% to 30%, for example, it can be 1%, 2%, 3%, 5%, 6%, 8%, 10%, 12%, 13%, 15%, 16%, 18%, 20%, 22%, 23%, 25%, 26%, 28%, or 30%, etc.;

[0049] The compounds represented by general formula II range from 1% to 40%, for example, they can be 1%, 2%, 3%, 5%, 6%, 8%, 10%, 12%, 13%, 15%, 16%, 18%, 20%, 22%, 23%, 25%, 26%, 28%, 30%, 32%, 33%, 35%, 36%, 38%, or 40%, etc.

[0050] The compounds represented by general formula III are 1% to 30%, for example, 1%, 2%, 3%, 5%, 6%, 8%, 10%, 12%, 13%, 15%, 16%, 18%, 20%, 22%, 23%, 25%, 26%, 28%, or 30%, etc.;

[0051] The compound represented by general formula IV is 1% to 30%, for example, it can be 1%, 2%, 3%, 5%, 6%, 8%, 10%, 12%, 13%, 15%, 16%, 18%, 20%, 22%, 23%, 25%, 26%, 28%, or 30%, etc.;

[0052] The compound represented by general formula V is 1% to 50%, for example, it can be 1%, 2%, 3%, 5%, 6%, 8%, 10%, 12%, 13%, 15%, 16%, 18%, 20%, 22%, 23%, 25%, 26%, 28%, 30%, 32%, 33%, 35%, 36%, 38%, 40%, 42%, 43%, 45%, 46%, 48%, or 50%, etc.

[0053] In some preferred embodiments of the present invention, the negative liquid crystal composition comprises the following components in weight percentages: 3-25% of compounds represented by general formula I; 5-40% of compounds represented by general formula II; 3-30% of compounds represented by general formula III; 5-30% of compounds represented by general formula IV; and 5-45% of compounds represented by general formula V.

[0054] In some preferred embodiments of the present invention, the negative liquid crystal composition comprises the following components in weight percentages: 5-25% of compounds represented by general formula I; 10-40% of compounds represented by general formula II; 3-25% of compounds represented by general formula III; 5-25% of compounds represented by general formula IV; and 20-45% of compounds represented by general formula V.

[0055] In some preferred embodiments of the present invention, the negative liquid crystal composition comprises the following components in weight percentages: 8-20% of compounds represented by general formula I; 15-35% of compounds represented by general formula II; 3-20% of compounds represented by general formula III; 10-20% of compounds represented by general formula IV; and 25-48% of compounds represented by general formula V.

[0056] In a second aspect, the present invention provides an application of the negative liquid crystal composition as described in the first aspect, wherein the negative liquid crystal composition is used in a liquid crystal display, preferably in a VA, IPS or FFS mode display, and more preferably in an IPS or FFS mode liquid crystal display.

[0057] The present invention does not impose any particular limitation on the preparation method of the negative liquid crystal composition, and conventional methods can be used to prepare it by mixing two or more compounds. For example, it can be prepared by mixing different components at high temperature and dissolving them in each other; or, the component with a smaller content can be dissolved in the main component with a larger content at a higher temperature; or, the components can be dissolved in an organic solvent (such as acetone, chloroform, or methanol), and then the solutions are mixed and the solvent is removed.

[0058] Compared with the prior art, the present invention has the following beneficial effects:

[0059] The negative liquid crystal composition provided by this invention has low rotational viscosity, large elastic constant, small optical dispersion, good low-temperature miscibility, high transmittance and fast response speed. It can be used for fast-response liquid crystal displays in various display modes. It can significantly improve the display effect of liquid crystal displays in VA, IPS or FFS mode displays, and improve transmittance and contrast. It is especially suitable for IPS and FFS mode liquid crystal displays. Attached Figure Description

[0060] Figure 1 The VT curves are for the liquid crystal compositions provided in Examples 1, 10 and Comparative Example 1 of the present invention. Detailed Implementation

[0061] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0062] In this embodiment of the invention, the performance of the liquid crystal compound was tested using the following method:

[0063] △n: Represents optical anisotropy (25℃), measured using an Abbe refractometer;

[0064] △ε: Represents dielectric anisotropy (25℃, 1000Hz), measured using an INSTEC liquid crystal testing instrument;

[0065] γ1: Represents rotational viscosity (mPa·s, 25℃), measured using a viscometer;

[0066] K 11 K 33 The values ​​represent the development and flexural elastic constants (pN, 25℃), respectively, measured using an Instec property measuring instrument.

[0067] In this embodiment of the invention, the liquid crystal composition is prepared by a thermal dissolution method, which includes the following steps: weighing the liquid crystal compound by weight percentage using a balance, wherein there is no specific requirement for the order of weighing and adding, usually weighing and mixing in order of the melting point of the liquid crystal compound from high to low, heating and stirring at 60 to 100°C to make the components evenly mixed, then filtering, and finally encapsulating to obtain the target sample.

[0068] Example 1

[0069] This embodiment provides a negative liquid crystal composition, the composition and properties of which are as follows.

[0070]

[0071] Example 2

[0072] This embodiment provides a negative liquid crystal composition, the composition and properties of which are as follows.

[0073]

[0074] Example 3

[0075] This embodiment provides a negative liquid crystal composition, the composition and properties of which are as follows.

[0076]

[0077]

[0078] Example 4

[0079] This embodiment provides a negative liquid crystal composition, the composition and properties of which are as follows.

[0080]

[0081] Example 5

[0082] This embodiment provides a negative liquid crystal composition, the composition and properties of which are as follows.

[0083]

[0084]

[0085] Example 6

[0086] This embodiment provides a negative liquid crystal composition, the composition and properties of which are as follows.

[0087]

[0088] Example 7

[0089] This embodiment provides a negative liquid crystal composition, the composition and properties of which are as follows.

[0090]

[0091] Example 8

[0092] This embodiment provides a negative liquid crystal composition, the composition and properties of which are as follows.

[0093]

[0094] Example 9

[0095] This embodiment provides a negative liquid crystal composition, the composition and properties of which are as follows.

[0096]

[0097] Example 10

[0098] This embodiment provides a negative liquid crystal composition, the composition and properties of which are as follows.

[0099]

[0100] Example 11

[0101] This embodiment provides a negative liquid crystal composition, the composition and properties of which are as follows.

[0102]

[0103]

[0104] Example 12

[0105] This embodiment provides a negative liquid crystal composition, the composition and properties of which are as follows.

[0106]

[0107]

[0108] Comparative Example 1

[0109] This comparative example provides a liquid crystal composition with the following composition and properties.

[0110]

[0111] Comparative Example 2

[0112] This comparative example provides a liquid crystal composition that differs from Example 1 only in that it does not contain the compound represented by general formula I (the mass ratio between other components remains unchanged).

[0113] Comparative Example 3

[0114] This comparative example provides a liquid crystal composition that differs from Example 1 only in that it does not contain the compound represented by general formula II (the mass ratio between other components remains unchanged).

[0115] Comparative Example 4

[0116] This comparative example provides a liquid crystal composition that differs from Example 1 only in that it does not contain the compound represented by general formula III (the mass ratio between other components remains unchanged).

[0117] Comparative Example 5

[0118] This comparative example provides a liquid crystal composition that differs from Example 1 only in that it does not contain the compound represented by general formula IV (the mass ratio between other components remains unchanged).

[0119] Comparative Example 6

[0120] This comparative example provides a liquid crystal composition that differs from Example 1 only in that it does not contain the compound represented by general formula V (the mass ratio between other components remains unchanged).

[0121] The optical anisotropy values ​​of the liquid crystal compositions obtained in Examples 1, 10 and Comparative Example 1 were statistically compared, as shown in Table 1.

[0122] Table 1

[0123] Performance parameters Example 1 Example 10 Comparative Example 1 △n(480) 0.0929 0.0931 0.0964 △n(546) 0.0914 0.0916 0.0925 △n(589) 0.0910 0.0910 0.0909 △n(656) 0.0905 0.0904 0.0890

[0124] As can be seen from Table 1, compared with Comparative Example 1, under the same conditions of Δn(589), the refractive index of the liquid crystal compositions of Example 1 and Example 10 is significantly smaller at short wavelengths and significantly larger at long wavelengths. Therefore, the light dispersion of the liquid crystal compositions of Example 1 and Example 10 is smaller.

[0125] Simulation experiments were conducted using Techwiz optical simulation software. The liquid crystal compositions obtained in Example 1, Example 10, and Comparative Example 1 were compared through optical simulation, and VT curves were plotted (e.g., ...). Figure 1 As shown), the maximum transmittance (T) was obtained. max The transmittance is calculated by taking the transmittance of Comparative Example 1 as 100% and obtaining the transmittance percentage of the Example. The results are shown in Table 2.

[0126] Table 2

[0127] Performance parameters Comparative Example 1 Example 1 Example 10 <![CDATA[T max ]]> 0.3067 0.3151 0.3151 T％ 100％ 102.74％ 102.74％

[0128] from Figure 1As can be seen from Table 2, compared with Comparative Example 1, the transmittance of the liquid crystal compositions of Example 1 and Example 10 is increased by about 2.7%. This indicates that when a liquid crystal display is manufactured using the same technical conditions, the liquid crystal composition provided by the present invention has a higher transmittance and can significantly reduce the brightness of the backlight, thereby achieving the effect of energy saving.

[0129] The properties of the liquid crystal compositions provided in Comparative Examples 2-6 are shown in Table 3.

[0130] Table 3

[0131] Performance parameters Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6 △ε -3.05 -1.89 -4.71 -3.50 -4.04 -0.73 γ1 85.2 44.2 130.4 57.3 103.3 36.5 K11 16.92 15.42 19.20 12.78 17.86 14.96 K33 15.80 16.06 17.46 11.28 17.17 11.84 △n(480) 0.0929 0.0948 0.1168 0.0964 0.1123 0.0740 △n(546) 0.0914 0.0839 0.1131 0.0935 0.1084 0.0715 △n(589) 0.0910 0.0834 0.1113 0.0918 0.1063 0.0705 △n(656) 0.0905 0.0830 0.0998 0.0900 0.1045 0.0695

[0132] As shown in Table 3, compared with Example 1, Comparative Examples 2-6 lack compounds represented by General Formula I, General Formula II, General Formula III, General Formula IV, and General Formula V, respectively. The liquid crystal compositions obtained in Comparative Examples 2 and 6 have lower dielectric constants than those in Example 1, requiring higher driving voltages and resulting in higher energy consumption, which is detrimental to the application of liquid crystal displays. The liquid crystal compositions obtained in Comparative Examples 3 and 5 have higher rotational viscosity (γ1) and slower response times than those in Example 1; the liquid crystal composition obtained in Comparative Example 4 has lower elastic constant (K11) and lower contrast than that in Example 1. Therefore, the lack of any one component significantly reduces the display performance and characteristics of the composition. This indicates that the five components in the liquid crystal composition of the present invention have a synergistic relationship; the lack of any one of them will make it difficult for the performance of the liquid crystal composition to meet the requirements of this application.

[0133] The above description is merely a specific embodiment of this disclosure, enabling those skilled in the art to understand or implement it. 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 this disclosure. Therefore, this disclosure is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A negative liquid crystal composition, characterized in that, It comprises the following components in mass percentage: 5-25% of at least one compound represented by general formula I, 10-40% of at least one compound represented by general formula II, 3-25% of at least one compound represented by general formula III, 5-25% of at least one compound represented by general formula IV, and 20-50% of at least one compound represented by general formula V; I； II; III; IV; V； In the general formula I, R1 represents an alkyl group with 1-7 carbon atoms or an alkenyl group with 2-7 carbon atoms, and n represents 0, 1 or 2. In the general formula II, R2 and R3 each independently represent an alkyl group with 1-7 carbon atoms, an alkoxy group with 1-7 carbon atoms, or an alkenyl group with 2-7 carbon atoms; In general formula III, R4 and R5 each independently represent an alkyl group with 1-7 carbon atoms, an alkoxy group with 1-7 carbon atoms, or an alkenyl group with 2-7 carbon atoms, and m represents 1 or 2. represent , or And m in general formula III They are independent of each other, among which Represents the connecting bond of a group; In the general formula IV, R6 and R7 each independently represent an alkyl group with 1-7 carbon atoms, an alkoxy group with 1-7 carbon atoms, or an alkenyl group with 2-7 carbon atoms. In the general formula V, R8 and R9 each independently represent an alkyl group with 1-7 carbon atoms, an alkoxy group with 1-7 carbon atoms, or an alkenyl group with 2-7 carbon atoms, and p represents 1 or 2. represent , or And the p elements in the general formula V They are independent of each other, among which The connecting bond of the group.

2. The negative liquid crystal composition according to claim 1, characterized in that, In the general formula I, R1 represents an alkyl group with 1-5 carbon atoms or a monoalkenyl group with 2-5 carbon atoms, and n represents 0 or 1.

3. The negative liquid crystal composition according to claim 2, characterized in that, The compounds represented by general formula I include one or more of the compounds represented by formulas IA1-IA12 and IB1-IB12; 4. The negative liquid crystal composition according to claim 1, characterized in that, In the general formula II, R2 and R3 each independently represent an alkyl group with 1-5 carbon atoms or a monoalkenyl group with 2-5 carbon atoms.

5. The negative liquid crystal composition according to claim 4, characterized in that, The compounds represented by general formula II include one or more of the compounds represented by formulas IIA1-IIA12, IIB1-IIB14 and IIC1-IIC4; 6. The negative liquid crystal composition according to claim 1, characterized in that, In the general formula III, R4 represents an alkyl group with 1-5 carbon atoms or a monoalkenyl group with 2-5 carbon atoms, R5 represents an alkyl group with 1-5 carbon atoms or an alkoxy group with 1-5 carbon atoms, and m is 1.

7. The negative liquid crystal composition according to claim 6, characterized in that, The compounds represented by general formula III include one or more of the compounds represented by formulas IIIA1-IIIA48, IIIB1-IIIB48 and IIIC1-IIIC48; 8. The negative liquid crystal composition according to claim 1, characterized in that, In the general formula IV, R6 and R7 each independently represent an alkyl group with 1-5 carbon atoms or an alkoxy group with 1-5 carbon atoms, or one of R6 and R7 represents an alkyl group with 1-5 carbon atoms and the other represents a monoalkenyl group with 2-5 carbon atoms.

9. The negative liquid crystal composition according to claim 8, characterized in that, The compounds represented by general formula IV include one or more of the compounds represented by formulas IVA1-IVA15, IVB1-IVB20 and IVC1-IVC15; 10. The negative liquid crystal composition according to claim 1, characterized in that, In the general formula V, R8 represents an alkyl group with 1-5 carbon atoms or a monoalkenyl group with 2-5 carbon atoms, and R9 represents an alkyl group with 1-5 carbon atoms or an alkoxy group with 1-5 carbon atoms.

11. The negative liquid crystal composition according to claim 10, characterized in that, The compounds represented by the general formula V include one or more of the compounds represented by formulas VA1-VA48, VB1-VB48, VC1-VC48, VD1-VD48, VE1-VE48, VF1-VF48 and VG1-VG48.

12. The negative liquid crystal composition according to claim 1, characterized in that, The negative liquid crystal composition comprises the following components by mass percentage: Compounds represented by general formula I account for 8-20%; Compounds represented by general formula II account for 15-35%; Compounds represented by general formula III account for 3-20%; Compounds represented by formula IV account for 10-20%; Compounds represented by general formula V account for 25-48%.

13. An application of the negative liquid crystal composition according to any one of claims 1-12, characterized in that, The negative liquid crystal composition is used in liquid crystal displays.

14. The application according to claim 13, characterized in that, The negative liquid crystal composition is used in VA, IPS or FFS mode displays.

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