Liquid crystal composition and display device thereof

Abstract

The present invention relates to a liquid crystal composition and a display device thereof, and belongs to the field of liquid crystal materials. The liquid crystal composition comprises at least one dielectric negative compound M, and the compound M is selected from the compounds represented by the following general formulas M-I and / or M-II: at least one compound represented by the general formula G: at least one compound represented by the general formula I: and at least one compound represented by the general formula II: The liquid crystal composition of the present invention has a larger ε∥, thereby having a larger liquid crystal capacitance, and also has a larger ε⊥, a higher ε⊥ / |Δε| ratio, and a higher transmittance and contrast. At the same time, the liquid crystal composition of the present invention has good low-temperature storage stability, a lower rotational viscosity, and can reduce the response time of a liquid crystal display.

Description

Technical Field

[0001] The invention relates to a liquid crystal composition and application, in particular to a negative liquid crystal composition and a display device thereof, belonging to the field of liquid crystal materials. Background Art

[0002] These liquid crystal display elements made by utilizing the refractive index anisotropy and dielectric anisotropy of liquid crystal compounds are widely used in display devices such as televisions and monitors. Among them, negative liquid crystal displays are popular due to their high contrast and good viewing angle characteristics. VA panels are very suitable for black content and scenes, with very high contrast and deep black. In recent years, with the continuous increase in display applications, display devices such as e-sports continue to increase their demand for display time. Compared with lower refresh rates, high refresh rates have some advantages in motion clarity.

[0003] However, due to the influence of the characteristics of liquid crystal materials, the ε∥ of negative liquid crystal monomers is generally small, and the ε⊥ of liquid crystals is also relatively small, resulting in a small liquid crystal storage capacitor and a low liquid crystal transmittance. Therefore, it is necessary to provide a liquid crystal material with a large dielectric, a fast response and stable low-temperature performance. Summary of the invention

[0004] In view of the problems existing in the prior art, in order to improve the negative liquid crystal parallel dielectric ε∥ and vertical dielectric ε⊥ are small, so that the liquid crystal storage capacitance is small and the liquid crystal transmittance is low, the present invention discloses a negative liquid crystal composition, comprising a negative component and a positive component, the overall dielectric is negative, the material has a large dielectric, a rapid response and stable low temperature performance.

[0005] The liquid crystal composition of the present invention comprises compound M, compound G, compound I and bicyclohexane compound II. Such liquid crystal composition has low rotational viscosity when used as a liquid crystal material, can shorten the response time, and has good mutual solubility between components, thereby improving low-temperature performance.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A liquid crystal composition comprises: at least one dielectric negative compound M as a first component, wherein the compound M is selected from the compounds represented by the following general formula MI and / or M-II:

[0008]

[0009]

[0010] Among them, R M1 , R M2 Each independently represents an alkyl group having 1 to 12 carbon atoms, or an alkoxy group having 1 to 12 carbon atoms;

[0011] Rings M1 and M2 are independent of each other.

[0012] Z M represents a CC single bond, -CH2CH2-, -CF2O-, -OCF2-, -CH2O-, -OCH2-, -CO-O-, -C2F4-, or -CF=CF-;

[0013] m represents 0, 1 or 2;

[0014] It also contains at least one compound represented by the general formula G as a second component:

[0015]

[0016] Among them, rings B1 and B2 are independent of each other. One or more H in the

[0017] R B1 represents an alkyl group having 1 to 12 carbon atoms, an alkoxy group having 1 to 12 carbon atoms, or an alkenyl group having 2 to 12 carbon atoms;

[0018] R B2 represents F, Cl, CF3 or -OCF3;

[0019] L B1 , L B2 Each independently represents F or H;

[0020] Z2 represents a CC single bond or -CH2CH2-;

[0021] a represents 0 or 1;

[0022] At least one compound represented by general formula I is used as the third component:

[0023]

[0024] Among them, R C1 , R C2 Each independently represents an alkyl group having 1 to 12 carbon atoms, an alkoxy group having 1 to 12 carbon atoms, or an alkenyl group having 2 to 12 carbon atoms;

[0025] Rings C1, C2, and C3 are represented independently and At most one H on can be replaced by F;

[0026] b represents 0, 1 or 2. When b represents 2, the ring C2 may be the same or different;

[0027] c represents 0 or 1;

[0028] And at least one compound of general formula II as the fourth component:

[0029]

[0030] Among them, R D1 , R D2 Each independently represents an alkyl group having 1 to 12 carbon atoms, an alkoxy group having 1 to 12 carbon atoms, or an alkenyl group having 2 to 12 carbon atoms.

[0031] Furthermore, the compound of general formula M is selected from one or more of the compounds represented by the following general formulae MA to ML:

[0032]

[0033] Among them, R M1 , R M2 Each independently represents an alkyl group having 1 to 12 carbon atoms or an alkoxy group having 1 to 12 carbon atoms.

[0034] Furthermore, the compound represented by the general formula M is selected from a combination of any three or more compounds represented by the general formulae MA, MB, MC, MD, ME and MJ.

[0035] Further, the general formula M may be selected from at least one compound of the general formula MA, at least one compound of the general formula MB and at least one compound of MC;

[0036] Further, the general formula M may be selected from at least one compound of the general formula MA, at least one compound of the general formula MB, at least one compound of MC and at least one compound of MD;

[0037] Further, the general formula M may be selected from at least one compound of the general formula MA, at least one compound of the general formula MB, at least one compound of MC and at least one compound of ME;

[0038] Further, the general formula M may be selected from at least one compound of the general formula MA, at least one compound of the general formula MB, at least one compound of MC and at least one compound of MJ;

[0039] Further, the general formula M may be selected from at least one compound of the general formula MA, at least one compound of the general formula MB, at least one compound of MC, at least one compound of MD and at least one compound of ME;

[0040] Further, the general formula M may be selected from at least one compound of the general formula MA, at least one compound of the general formula MC, at least one compound of MD, at least one compound of ME and at least one compound of MJ;

[0041] Further, the general formula M may be selected from at least one compound of the general formula MC, at least one compound of the general formula MD and at least one compound of ME;

[0042] Further, the general formula M may be selected from at least one compound of the general formula MC, at least one compound of the general formula MD, at least one compound of ME and at least one compound of MJ.

[0043] In some embodiments of the present invention, the compound of formula M is selected from one or more of the following compounds M-1 to M-96:

[0044]

[0045]

[0046]

[0047]

[0048]

[0049] Relative to the total weight of the liquid crystal composition of the present invention, the weight percentage of the compound of the general formula M is 40%-70%, preferably 41%-68%, 42%-66%, 43%-64%, 44%-62%, 45%-61% or 46%-60%. Relative to the total weight of the liquid crystal composition of the present invention, the lower limit of the weight percentage of the compound of the general formula M is 40%, 41%, 42%, 33%, 44%, 45% or 46%; the upper limit of the weight percentage of the compound of the general formula M is 70%, 68%, 66%, 64%, 62%, 61% or 60%.

[0050] Further, the compound of general formula G is selected from one or more compounds in the group consisting of the following compounds G-1 to G-14:

[0051]

[0052]

[0053] Among them, R B1 It represents an alkyl group having 1 to 12 carbon atoms, an alkoxy group having 1 to 12 carbon atoms, or an alkenyl group having 2 to 12 carbon atoms.

[0054] Furthermore, the compound represented by general formula G is selected from a combination of compounds represented by any two or more of general formulae G-1, G-3, G-5, G-6, G-7, G-13 and G-14.

[0055] Further, the general formula G can be selected from at least one compound of the general formula G-1 and at least one compound of the general formula G-5;

[0056] Further, the general formula G can be selected from at least one compound of the general formula G-3 and at least one compound of the general formula G-5;

[0057] Further, the general formula G can be selected from at least one compound of the general formula G-5 and at least one compound of the general formula G-13;

[0058] Further, the general formula G can be selected from at least one compound of the general formula G-6 and at least one compound of the general formula G-7;

[0059] Furthermore, the general formula G can be selected from at least one compound of the general formula G-13 and at least one compound of the general formula G-14.

[0060] Relative to the total weight of the liquid crystal composition of the present invention, the weight percentage of the compound of the general formula G is 1%-20%, preferably 1.5%-20%, 2%-20%, 3%-20%, 3%-18%, 4%-16%, 5%-15%, 6%-14%, 7%-12% or 8%-10%. Relative to the total weight of the liquid crystal composition of the present invention, the lower limit of the weight percentage of the compound of the general formula G is 1%, 1.5%, 2%, 3%, 4%, 5%, 6%, 7% or 8%; the upper limit of the weight percentage of the compound of the general formula G is 20%, 18%, 16%, 15%, 14%, 12% or 10%.

[0061] Furthermore, the compound of formula I is selected from one or more of the compounds represented by the following formulae IA to IH:

[0062]

[0063] Among them, R C1 , R C2 Each independently represents an alkyl group having 1 to 12 carbon atoms, an alkoxy group having 1 to 12 carbon atoms, or an alkenyl group having 2 to 12 carbon atoms.

[0064] Furthermore, the compound of formula I is selected from a combination of compounds represented by any two or more of formulae IA, IB, IC, ID and IE.

[0065] Further, Formula I can be selected from at least one compound of Formula IA and at least one compound of Formula IC;

[0066] Further, Formula I can be selected from at least one compound of Formula IB and at least one compound of Formula ID;

[0067] Further, Formula I may be selected from at least one compound of Formula IB and at least one compound of Formula IC;

[0068] Further, Formula I can be selected from at least one compound of Formula IB and at least one compound of Formula ID;

[0069] Further, Formula I can be selected from at least one compound of Formula ID and at least one compound of Formula IE;

[0070] Further, Formula I may be selected from at least one compound of Formula IA, at least one compound of Formula ID and at least one compound of Formula IE.

[0071] In some embodiments of the present invention, preferably, the compound of formula I is one or more compounds selected from the group consisting of the following compounds I-1 to I-68:

[0072]

[0073]

[0074]

[0075] Relative to the total weight of the liquid crystal composition of the present invention, the weight percentage of the compound of general formula I is 1%-60%, preferably 1-50%, 1.5%-58%, 2%-56%, 3%-54%, 4%-52%, 5%-50%, 6%-48%, 7%-45%, 8%-40%, 9%-38%, 10%-35%, 12%-30%, 14%-28%, 16%-26%, 20%-24% or 22%-24%. Relative to the total weight of the liquid crystal composition of the present invention, the lower limit of the weight percentage of the compound of general formula I is 1%, 1.5%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 12%, 14%, 16%, 20%, 22%, 24% or 26%; the upper limit of the weight percentage of the compound of general formula I is 60%, 58%, 56%, 54%, 52%, 50%, 48%, 45%, 40%, 38%, 35%, 30%, 28%, 26%, 24%, 20%, 18%, 16%, 15%, 14%, 12% or 10%.

[0076] In some embodiments of the present invention, preferably, the compound of formula II is one or more compounds selected from the group consisting of the following compounds II-1 to II-19:

[0077]

[0078]

[0079] Furthermore, the compound represented by general formula II is selected from a combination of compounds represented by any two or more of general formulae II-2, II-4, II-8, II-18 and II-19.

[0080] Further, the general formula II can be selected from at least one compound of formula II-2 and at least one compound of formula II-4;

[0081] Further, the general formula II can be selected from at least one compound of formula II-18 and at least one compound of formula II-19;

[0082] Furthermore, the compound of formula II can be selected from at least one compound of formula II-2, at least one compound of formula II-4 and at least one compound of formula II-8.

[0083] Relative to the total weight of the liquid crystal composition of the present invention, the weight percentage of the compound of general formula II is 1%-60%, and further preferably 1.5%-58%, 2%-56%, 3%-54%, 4%-52%, 5%-50%, 6%-48%, 7%-45%, 8%-40%, 9%-38%, 10%-35%, 12%-30%, 14%-28%, 16%-26%, 20%-24% or 22%-24%. Relative to the total weight of the liquid crystal composition of the present invention, the lower limit of the weight percentage of the compound of general formula II is 1%, 1.5%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 12%, 14%, 16%, 20%, 22%, 24% or 26%; the upper limit of the weight percentage of the compound of general formula II is 60%, 58%, 56%, 54%, 52%, 50%, 48%, 45%, 40%, 38%, 35%, 30%, 28%, 26%, 24%, 20%, 18%, 16%, 15%, 14%, 12% or 10%.

[0084] In the liquid crystal composition, calculated by mass percentage, the content of the compound represented by general formula G is 1-20%, preferably 3-20%, the content of the compound represented by general formula M is 40-70%, the content of the compound represented by general formula I is 1-50%, and the content of the compound represented by general formula II is 1-58%.

[0085] In the liquid crystal composition, calculated by mass percentage, the content of the compound represented by general formula G is 3-10%, the content of the compound represented by general formula M is 45-70%, the content of the compound represented by general formula I is 4-50%, and the content of the compound represented by general formula II is 3-48%.

[0086] One or more chiral agents are further added to the liquid crystal mixture of the present invention, and the content of the chiral agent accounts for 0-5% by mass of the entire liquid crystal composition.

[0087] Furthermore, the chiral compound is selected from one or more of the following compounds:

[0088]

[0089]

[0090] as well as

[0091]

[0092] On the other hand, the liquid crystal composition provided by the present invention further comprises one or more additives known to those skilled in the art and described in the literature, such as a stabilizer.

[0093] For example, one or more stabilizers having the following structures may be added to the liquid crystal mixture of the present invention:

[0094]

[0095]

[0096]

[0097]

[0098] Preferably, the stabilizer is selected from one or more stabilizers having the following structures:

[0099]

[0100] In the stabilizer, n represents an integer of 1-12, for example, n represents 1, 2, 3, 4, 5, 6, 8, 10 or 11, etc.

[0101] In an embodiment of the present invention, the stabilizer preferably accounts for 0-5% of the total weight of the liquid crystal composition; more preferably, the stabilizer accounts for 0-1% of the total weight of the liquid crystal composition; as a particularly preferred embodiment, the stabilizer accounts for 0.01-0.2% of the total weight of the liquid crystal composition.

[0102] The parallel dielectric ε∥ of the liquid crystal composition of the present invention is greater than or equal to 4. The negative liquid crystal composition of the present invention can be used in the preparation of a liquid crystal display device.

[0103] The present invention provides a liquid crystal display device comprising the negative liquid crystal composition of the present invention, wherein the display device includes VA, MVA, PVA, IPS and FFS mode liquid crystal display devices.

[0104] Advantages of the present invention:

[0105] The liquid crystal composition of the present invention has a vertical dielectric constant of liquid crystal, a large parallel dielectric constant, a high storage capacitance and a good transmittance.

[0106] The liquid crystal composition of the present invention has a larger ε∥, thus having a larger liquid crystal capacitance, and also has a larger ε⊥, a higher ε⊥ / |Δε| ratio, and a higher transmittance and contrast. At the same time, the liquid crystal composition of the present invention has good low-temperature storage stability and a lower rotational viscosity, and can reduce the response time of the liquid crystal display. DETAILED DESCRIPTION

[0107] For ease of expression, in the following embodiments, the group structures of the liquid crystal compositions are represented by the codes listed in Table 1.

[0108] Table 1 Group structure codes of liquid crystal compounds

[0109]

[0110]

[0111] Take the following compound as an example:

[0112]

[0113] Expressed using the code in Table 1, it is 3PGP2.

[0114] Another example:

[0115]

[0116] Expressed as 3PGUF.

[0117] The abbreviated codes for the test items in the following embodiments are as follows:

[0118] Cp (℃): clearing point (nematic-isotropic phase transition temperature);

[0119] Δn: refractive index anisotropy (589nm, 25℃);

[0120] Δε: dielectric anisotropy (1KHz, 25℃);

[0121] Where Δε=ε || -ε ⊥ , where ε || is the dielectric constant parallel to the molecular axis, ε ⊥ is the dielectric constant perpendicular to the molecular axis, test conditions: 25°C, 1KHz;

[0122] ε⊥ / |Δε|: The ratio of the vertical dielectric to the absolute value of the dielectric, which is proportional to the contrast of the VA type display device;

[0123] t(ms): response time (25±0.5℃); Liquid crystal is filled between two glass substrates and measured with LCT-5016 t=t on +t off :t on It represents the time required for the relative transmittance to change from 10% to 90%, t off It indicates the time required for the relative transmittance to change from 90% to 10%;

[0124] γ1: represents the rotational viscosity [mPa·s] measured at 25°C, which is measured by the rotation method in a magnetic field;

[0125] LTS: Low temperature storage stability, the liquid crystal mixture is stored in a glass bottle under low temperature conditions.

[0126] Pitch: Pitch. When a chiral agent is added to the nematic liquid crystal compound, a liquid crystal with a certain pitch is formed. The pitch is measured by filling the liquid crystal between the wedge-shaped box and measuring it with a reading microscope.

[0127] Example 1: A mixture M1 was prepared according to the compounds and weight percentages listed in Table 2, and filled between two substrates of a liquid crystal display for performance testing. The composition and test data of the mixture M1 are shown in Table 2 below.

[0128] Table 2 Composition (wt%) and test performance of the liquid crystal composition of Example 1

[0129]

[0130] Comparative Example 1: A mixture D1 was prepared according to the compounds and weight percentages listed in Table 3, and filled between two substrates of a liquid crystal display for performance testing. The composition and test data of the mixture D1 are shown in Table 3 below.

[0131] Table 3 Composition (weight %) and test performance of the liquid crystal composition of Comparative Example 1

[0132]

[0133]

[0134] Example 2: A mixture M2 was prepared according to the compounds and weight percentages listed in Table 4, and filled between two substrates of a liquid crystal display for performance testing. The composition and test data of the mixture M2 are shown in Table 4 below.

[0135] Table 4 Composition (weight %) and test performance of the liquid crystal composition of Example 2

[0136]

[0137] Example 3: A mixture M3 was prepared according to the compounds and weight percentages listed in Table 5, and filled between two substrates of a liquid crystal display for performance testing. The composition and test data of the mixture M3 are shown in Table 5 below.

[0138] Table 5 Composition (weight %) and test performance of the liquid crystal composition of Example 3

[0139]

[0140]

[0141] Example 4: A mixture M4 was prepared according to the compounds and weight percentages listed in Table 6, and filled between two substrates of a liquid crystal display for performance testing. The composition and test data of the mixture M4 are shown in Table 6 below.

[0142] Table 6 Composition (weight %) and test performance of the liquid crystal composition of Example 4

[0143]

[0144] Example 5: A mixture M5 was prepared according to the compounds and weight percentages listed in Table 7, and filled between two substrates of a liquid crystal display for performance testing. The composition and test data of the mixture M5 are shown in Table 7 below.

[0145] Table 7 Composition (wt%) and test performance of the liquid crystal composition of Example 5

[0146]

[0147] Example 6: A mixture M6 was prepared according to the compounds and weight percentages listed in Table 8, and filled between two substrates of a liquid crystal display for performance testing. The composition and test data of the mixture M6 are shown in Table 8 below.

[0148] Table 8 Composition (weight %) and test performance of the liquid crystal composition of Example 6

[0149]

[0150]

[0151] Example 7: A mixture M7 was prepared according to the compounds and weight percentages listed in Table 9, and filled between two substrates of a liquid crystal display for performance testing. The composition and test data of the mixture M7 are shown in Table 9 below.

[0152] Table 9 Composition (weight %) and test performance of the liquid crystal composition of Example 7

[0153]

[0154] To the above mixture, an additional 400 ppm of additives were added:

[0155]

[0156] Example 8: A mixture M8 was prepared according to the compounds and weight percentages listed in Table 10, and filled between two substrates of a liquid crystal display for performance testing. The composition and test data of the mixture M8 are shown in Table 10 below.

[0157] Table 10 Composition (weight %) and test performance of the liquid crystal composition of Example 8

[0158]

[0159] 0.3 wt.% of chiral compound S811 was additionally added to the above mixture, and its helical pitch was measured to be 45 μm.

[0160] It can be seen from the above Examples 1-8 and Comparative Example 1 that the liquid crystal composition of the present invention has a larger ε∥, thus having a larger liquid crystal capacitance, and also has a larger ε⊥, a higher ε⊥ / |Δε| ratio, and a higher transmittance and contrast. At the same time, the liquid crystal composition of the present invention has good low-temperature storage stability, a lower rotational viscosity, and can reduce the response time of the liquid crystal display.

[0161] Although several exemplary embodiments have been described above in detail, the disclosed embodiments are exemplary and non-restrictive only, and those skilled in the art will readily appreciate that many other modifications, alterations and / or substitutions are possible in the exemplary embodiments without materially departing from the novel teachings and advantages of the present disclosure. Therefore, all such modifications, alterations and / or substitutions are intended to be included within the scope of the present disclosure as defined by the appended claims.

Claims

1. A liquid crystal composition, characterized in that: It contains at least one dielectric negative compound M, and the compound M is selected from the combination of any three or more compounds represented by the general formulas MA, MB, MC, MD, ME and MJ: Among them, R M1 , R M2 Each independently represents an alkyl group having 1 to 12 carbon atoms, or an alkoxy group having 1 to 12 carbon atoms; At least one compound represented by the general formula G: Among them, rings B1 and B2 are independently represented One or more H in the R B1 represents an alkyl group having 1 to 12 carbon atoms, an alkoxy group having 1 to 12 carbon atoms, or an alkenyl group having 2 to 12 carbon atoms; R B2 represents F, Cl, CF3 or -OCF3; L B1 , L B2 Each independently represents F or H; Z2 represents a CC single bond or -CH2CH2-; a represents 0 or 1; At least one compound of formula I: Among them, R C1 , R C2 Each independently represents an alkyl group having 1 to 12 carbon atoms, an alkoxy group having 1 to 12 carbon atoms, or an alkenyl group having 2 to 12 carbon atoms; Rings C1, C2, and C3 are represented independently and At most one H on can be replaced by F; b represents 0, 1 or 2. When b represents 2, the ring C2 may be the same or different; c represents 0 or 1; And at least one compound of general formula II: Among them, R D1 , R D2 Each independently represents an alkyl group having 1 to 12 carbon atoms, an alkoxy group having 1 to 12 carbon atoms, or an alkenyl group having 2 to 12 carbon atoms.

2. The liquid crystal composition according to claim 1, characterized in that: The compound of formula G is one or more compounds selected from the group consisting of compounds G-1 to G-14:

3. The liquid crystal composition according to claim 1, characterized in that: The compound of formula I is selected from one or more of the compounds represented by formulas IA to IH:

4. The liquid crystal composition according to claim 1, characterized in that: In the liquid crystal composition, calculated by mass percentage, the content of the compound represented by general formula G is 1-20%, the content of the compound represented by general formula M is 40-70%, the content of the compound represented by general formula I is 1-50%, and the content of the compound represented by general formula II is 1-58%.

5. The liquid crystal composition according to claim 4, characterized in that: In the liquid crystal composition, calculated by mass percentage, the content of the compound represented by general formula G is 3-10%, the content of the compound represented by general formula M is 45-70%, the content of the compound represented by general formula I is 4-50%, and the content of the compound represented by general formula II is 3-48%.

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 chiral agents, and the content of the chiral agents accounts for 0-5% by weight of the entire liquid crystal composition.

7. 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 stabilizers, and the mass percentage content of the stabilizers is 0-5%.

8. The liquid crystal composition according to claim 1, characterized in that: Calculated by mass percentage, it contains: 12% of compound 3CPWO2, 5% of compound 3C1OWO1, 9% of compound 3C1OWO2, 8% of compound 2CC1OWO2, 10% of compound 3CC1OWO2, 5% of compound 2C1OWO2, 9% of compound 4CC1OWO2, 5% of compound 3PGUF, 4% of compound 5PGUF, 5% of compound 2CPP2, 7% of compound 3CPP1, 5% of compound 5PP1, 14% of compound 3CC2 and 2% of compound 4CC3.

9. The liquid crystal composition according to claim 1, characterized in that: Calculated by mass percentage, it contains: 3% of compound 2CPWO2, 12% of compound 3CPWO2, 5% of compound 3CWO2, 9% of compound 5CWO2, 8% of compound 2CCWO2, 10% of compound 3CCWO2, 5% of compound 3CWO4, 9% of compound 4CCWO2, 4% of compound 3CPUF, 5% of compound 3PGUF, 5% of compound 5PP1, 5% of compound 2CPP2, 4% of compound 3CPP1, 14% of compound 3CC2 and 2% of compound 4CC3.

10. The liquid crystal composition according to claim 1, characterized in that: Calculated by mass percentage, it contains: 6% of compound 3CCWO2, 9% of compound 3CPWO2, 10% of compound 3C1OWO1, 9% of compound 3C1OWO2, 8% of compound 2CC1OWO2, 10% of compound 3CC1OWO2, 5% of compound 2C1OWO2, 9% of compound 4CC1OWO2, 5% of compound 3PGUF, 4% of compound 5PGUF, 5% of compound 5PP1, 4% of compound 3CCP1, 14% of compound 3CC2 and 2% of compound 4CC3.

11. The liquid crystal composition according to claim 1, characterized in that: Calculated by mass percentage, it contains: 6% of compound 2CPWO2, 11% of compound 3CPWO2, 10% of compound 3C1OWO1, 9% of compound 3C1OWO2, 8% of compound 2CC1OWO2, 10% of compound 3CC1OWO2, 5% of compound 2C1OWO2, 9% of compound 4CC1OWO2, 5% of compound 3CCUF, 4% of compound 5PGUF, 4% of compound 3CCP1, 5% of compound 5PP1, 12% of compound 3CCV1 and 2% of compound 4CCV1.

12. The liquid crystal composition according to claim 1, characterized in that: Calculated by mass percentage, it contains: 11% of compound 3CPWO2, 5% of compound 3C1OWO1, 5% of compound 3C1OWO2, 8% of compound 2CC1OWO2, 7% of compound 3CC1OWO2, 4% of compound 2C1OWO2, 7% of compound 4CC1OWO2, 3% of compound 3CPUF, 5% of compound 5PGUF, 10% of compound 3CPP2, 6% of compound VCCP1, 10% of compound 5PP1, 16% of compound 3CCV1 and 3% of compound 4CCV1.

13. The liquid crystal composition according to claim 1, characterized in that: Calculated by mass percentage, it contains: 6% of compound 3PWO2, 11% of compound 3CPWO2, 9% of compound 3C1OWO1, 9% of compound 3C1OWO2, 8% of compound 2CC1OWO2, 11% of compound 3CC1OWO2, 4% of compound 2C1OWO2, 9% of compound 4CC1OWO2, 3% of compound 3CPUF, 5% of compound 5PGUF, 6% of compound VCCP1, 4% of compound 1PP2V1, 12% of compound 3CCV1 and 3% of compound 4CCV1.

14. The liquid crystal composition according to claim 1, characterized in that: Calculated by mass percentage, it contains: 2% of compound 3C1OWO2, 12.5% ​​of compound 3CWO2, 9.5% of compound 3CCWO2, 9% of compound 3CCWO3, 8% of compound 4CCWO2, 5% of compound 5CCWO2, 5% of compound 2CPWO2, 10% of compound 3CPWO2, 1% of compound 3PPGUF, 3% of compound 3CPGUCF3, 10% of compound 3CPO2, 6% of compound 3CCP1, 15% of compound 3CC2 and 4% of compound 3CC4.

15. The liquid crystal composition according to claim 1, characterized in that: Calculated by mass percentage, it contains: 6% of compound 4CC1OWO2, 9% of compound 3CWO2, 6% of compound 3CCWO2, 8% of compound 4CCWO2, 8% of compound 5CCWO2, 8% of compound 3CPWO2, 7% of compound 2CC1OWO2, 8% of compound 3CC1OWO2, 5% of compound 3PGUOCF3, 8% of compound 3CPO25% of compound 3CPP2, 10% of compound 3CC2 10, 6% of compound 3CC4 and 6% of compound 3CC5.

16. A liquid crystal display device, characterized in that: A negative dielectric liquid crystal composition comprising the negative dielectric liquid crystal composition according to any one of claims 1 to 15.

17. The liquid crystal display device according to claim 16, characterized in that: The liquid crystal display devices include VA, MVA, PVA, IPS and FFS mode liquid crystal display devices.

Images