Liquid crystal composition and liquid crystal display panel

Abstract

The embodiment of the application discloses a liquid crystal composition and a liquid crystal display panel. The liquid crystal composition comprises a first compound, a second compound, a third compound and a fourth compound. The liquid crystal composition provided by the embodiment of the application has the characteristics of low viscosity, high optical anisotropy and adjustable clearing point, can be applied to different application scenarios, and can reduce the response time when the liquid crystal composition is applied to a display panel.

Description

Technical Field

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

[0002] Liquid crystal compounds are widely used in various displays. To achieve better display effects and performance, the contrast ratio and response time of existing displays urgently need improvement. The contrast ratio and response time of liquid crystal displays are related to the liquid crystal material. Specifically, the dielectric anisotropy, polarity, clearing point, and optical anisotropy of the liquid crystal material are all closely related to the display effect and performance of the liquid crystal display.

[0003] In summary, there is a need to develop liquid crystal materials with faster response times and higher contrast to adapt to the continuous development of displays. Summary of the Invention

[0004] This application provides a liquid crystal composition and a liquid crystal display panel to solve the technical problem that the response speed of existing liquid crystal display panels needs to be improved.

[0005] To solve the above problems, the technical solution provided by the present invention is as follows:

[0006] This application provides a liquid crystal composition comprising:

[0007] At least one first compound as shown in formula (I):

[0008] At least one second compound as shown in formula (II):

[0009] At least one third compound as shown in formula (III): as well as

[0010] At least one fourth compound as shown in formula (IV):

[0011] Where X is selected from O or S;

[0012] m, n, o, and p are independently selected from integers from 0 to 2;

[0013] Each of the following groups is independently selected from those in which at least one H group is substituted by F, Cl, Br, or I, or is unsubstituted:

[0014] as well as Each independently selected

[0015] Z is selected from a single bond or -CH2-CH2-;

[0016] W is selected from a single bond or -CH2O-;

[0017] R1, R2, R3, R4, R5, R6, R7, and R8 are each independently selected from H, F, Cl, Br, I, CN, SCN, NCS, CF3, or SF5, or selected from at least one of the following groups in which at least one H is substituted or not substituted by F, Cl, Br, or I: alkyl groups having 1-15 carbon atoms, alkoxy groups having 1-15 carbon atoms, alkenyl groups having 2-15 carbon atoms, alkenoxy groups having 2-15 carbon atoms, alkynyl groups having 2-15 carbon atoms, or alkynoxy groups having 2-15 carbon atoms.

[0018] Optionally, in some embodiments of this application, at least one methylene group of at least one of R1, R2, R3, R4, R5, R6, R7 and R8 is independently replaced by -O-, -S-, -SO2-, -CO-, -C(O)O-, -OC(O)-, -OC(O)O-, -CF2O-, -OCF2-, -CH2O- or -OCH2- and the heteroatoms are not directly bonded.

[0019] Optionally, in some embodiments of this application, the third compound includes at least one of the compounds shown in formulas (III-1), (III-2), and (III-3):

[0020]

[0021]

[0022] Optionally, in some embodiments of this application, the third compound is selected from at least one of the compounds represented by the following formulas: III-1-1 to III-1-14, III-2-1 to III-2-14, and III-3-1 to III-3-12.

[0023]

[0024]

[0025] Optionally, in some embodiments of this application, the fourth compound includes at least one compound as shown in formula (IV-1) or (IV-2):

[0026]

[0027] Optionally, in some embodiments of this application, the fourth compound is selected from at least one of the compounds represented by the formulas IV-1-1 to IV-1-12 and IV-2-1 to IV-2-12:

[0028]

[0029] Optionally, in some embodiments of this application, the first compound is selected from at least one of the compounds shown in formulas I-1 to I-28:

[0030]

[0031] Optionally, in some embodiments of this application, the mass fraction of the first compound is 1% to 30%, the mass fraction of the second compound is 5% to 70%, the mass fraction of the third compound is 1% to 45%, and the mass fraction of the fourth compound is 1% to 50%, based on the total mass of the liquid crystal composition.

[0032] Optionally, in some embodiments of this application, the liquid crystal composition further includes:

[0033] At least one fifth compound as shown in formula (V):

[0034] And / or, at least one sixth compound as shown in formula (VI):

[0035] And / or, at least one seventh compound as shown in formula (VII):

[0036]

[0037] And / or, at least one eighth compound as shown in formula (VIII):

[0038]

[0039] And / or, at least one ninth compound as shown in formula (IX):

[0040]

[0041] Among them, R9, R 10 R 11 R 12 R 13 R 14 R 15 R 16 R 17 and R 18Each of the following groups, independently selected, is a group in which at least one H is substituted or unsubstituted by F, Cl, Br or I: an alkyl group having 1-10 carbon atoms, an alkoxy group having 1-10 carbon atoms, an alkenyl group having 2-10 carbon atoms, an alkenoxy group having 2-10 carbon atoms, an alkynyl group having 2-10 carbon atoms, or an alkynoxy group having 2-10 carbon atoms.

[0042] Based on the above embodiments, this application also provides a liquid crystal display panel, including a first substrate and a second substrate disposed opposite to each other, and a liquid crystal layer sandwiched between the first substrate and the second substrate, wherein the liquid crystal layer includes the liquid crystal composition described in any of the above embodiments.

[0043] The beneficial effects of the present invention are as follows: The liquid crystal composition provided in the embodiments of this application contains the first compound, the second compound, the third compound and the fourth compound, and has the characteristics of low viscosity, high optical anisotropy and adjustable clearing point, which can be applied to different application scenarios and can reduce the response time when the liquid crystal composition is applied to the display panel. Attached Figure Description

[0044] Figure 1 This is a schematic diagram of the structure of a liquid crystal display panel provided in an embodiment of the present invention. Detailed Implementation

[0045] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0046] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0047] The following disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, various specific examples of processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0048] This application provides a liquid crystal composition applicable to a liquid crystal display panel. The liquid crystal composition includes at least one first compound, at least one second compound, at least one third compound, and at least one fourth compound.

[0049] The structural formula of the first compound is shown in formula (I):

[0050]

[0051] Where X is selected from O or S.

[0052] R1 and R2 are each independently selected from H, F, Cl, Br, I, CN, SCN, NCS, CF3, SF5, substituted or unsubstituted alkyl groups having 1-15 carbon atoms, substituted or unsubstituted alkoxy groups having 1-15 carbon atoms, substituted or unsubstituted alkenyl groups having 2-15 carbon atoms, substituted or unsubstituted alkenyloxy groups having 2-15 carbon atoms, substituted or unsubstituted alkynyl groups having 2-15 carbon atoms, or substituted or unsubstituted alkynyloxy groups having 2-15 carbon atoms. The number of carbon atoms can specifically be 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15.

[0053] In the embodiments of this application, unless otherwise stated, "substituted or unsubstituted" means that at least one H atom in the group is substituted by F, Cl, Br or I.

[0054] Each of the following groups is independently selected from those in which at least one H group is substituted by F, Cl, Br, or I, or is unsubstituted:

[0055] as well as Each independently selected

[0056] m, n, o, and p are independently selected from integers from 0 to 2, that is, selected from 0, 1, or 2.

[0057] The structural formula of the second compound is shown in formula (II):

[0058] R3 and R4 are each independently selected from H, F, Cl, Br, I, CN, SCN, NCS, CF3, SF5, substituted or unsubstituted alkyl groups having 1-15 carbon atoms, substituted or unsubstituted alkoxy groups having 1-15 carbon atoms, substituted or unsubstituted alkenyl groups having 2-15 carbon atoms, substituted or unsubstituted alkenyloxy groups having 2-15 carbon atoms, substituted or unsubstituted alkynyl groups having 2-15 carbon atoms, or substituted or unsubstituted alkynyloxy groups having 2-15 carbon atoms. The number of carbon atoms can specifically be 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15.

[0059] The structural formula of the third compound is shown in formula (III):

[0060] R5 and R6 are each independently selected from H, F, Cl, Br, I, CN, SCN, NCS, CF3, SF5, substituted or unsubstituted alkyl groups having 1-15 carbon atoms, substituted or unsubstituted alkoxy groups having 1-15 carbon atoms, substituted or unsubstituted alkenyl groups having 2-15 carbon atoms, substituted or unsubstituted alkenyloxy groups having 2-15 carbon atoms, substituted or unsubstituted alkynyl groups having 2-15 carbon atoms, or substituted or unsubstituted alkynyloxy groups having 2-15 carbon atoms. The number of carbon atoms can specifically be 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15.

[0061] Each independently selected from each independently selected from

[0062] Z is selected from a single bond or -CH2-CH2-.

[0063] The structural formula of the fourth compound is shown in formula (IV):

[0064]

[0065] R7 and R8 are each independently selected from H, F, Cl, Br, I, CN, SCN, NCS, CF3, SF5, substituted or unsubstituted alkyl groups having 1-15 carbon atoms, substituted or unsubstituted alkoxy groups having 1-15 carbon atoms, substituted or unsubstituted alkenyl groups having 2-15 carbon atoms, substituted or unsubstituted alkenyloxy groups having 2-15 carbon atoms, substituted or unsubstituted alkynyl groups having 2-15 carbon atoms, or substituted or unsubstituted alkynyloxy groups having 2-15 carbon atoms. The number of carbon atoms can specifically be 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15.

[0066] Each independently selected W is selected from a single bond or -CH2O-.

[0067] The response time of a liquid crystal is positively correlated with its rotational viscosity and negatively correlated with its elastic constant. The first compound having structural formula I exhibits high negative dielectric anisotropy, high optical anisotropy, and a high clearing point, and can be used to improve the dielectric anisotropy, clearing point, and adjust the optical anisotropy of a liquid crystal composition. The second compound having structural formula II exhibits low rotational viscosity and can be used as a viscosity diluent for liquid crystal compositions, thereby reducing the response time of the liquid crystal composition. The third compound having structural formula III exhibits high optical anisotropy and a high clearing point, and can be used to improve the clearing point and adjust the optical anisotropy of a liquid crystal composition. The fourth compound having structural formula IV exhibits high negative dielectric anisotropy, adjustable optical anisotropy, and low rotational viscosity, and can be used to reduce the response time of a liquid crystal composition and also adjust its optical anisotropy.

[0068] The liquid crystal composition comprising the first compound, the second compound, the third compound, and the fourth compound provided in this application has the characteristics of low viscosity, high optical anisotropy, and adjustable clearing point, and can be applied to different scenarios, thereby reducing the response time of the liquid crystal composition when applied to a display panel.

[0069] In some embodiments, at least one methylene group (-CH2-) of at least one of R1, R2, R3, R4, R5, R6, R7, and R8 is independently replaced by -O-, -S-, -SO2-, -CO-, -C(O)O-, -OC(O)-, -OC(O)O-, -CF2O-, -OCF2-, -CH2O-, or -OCH2- and the heteroatoms are not directly bonded.

[0070] Furthermore, at least one methylene group of at least one of R1, R2, R3, R4, R5, R6, R7, and R8 may be independently substituted by -CF2O-, -OCF2-, -CH2-CH2-, -CF2-CF2-, -CF2-CH2-, -(CH2)3-, -CH2-CF2-, -CHF-CHF-, -CH2O-, -OCH2-, -CF=CH-, -CH=CF-, -CF=CF-, -CH=CH-, or -C≡C-.

[0071] In the embodiments of this application, based on the total mass of the liquid crystal composition, the mass fraction of the first compound is 1% to 30%, the mass fraction of the second compound is 5% to 70%, the mass fraction of the third compound is 1% to 45%, and the mass fraction of the fourth compound is 1% to 50%. Within this range of mass fractions, the stability of the liquid crystal composition at low temperatures (-20°C) is ensured, preventing crystal precipitation, while also reducing response time.

[0072] Preferably, the mass fraction of the first compound is 1% to 20%, the mass fraction of the second compound is 10% to 70%, the mass fraction of the third compound is 1% to 40%, and the mass fraction of the fourth compound is 1% to 40%.

[0073] More preferably, the mass fraction of the first compound is 1% to 15%, the mass fraction of the second compound is 25% to 60%, the mass fraction of the third compound is 1% to 25%, and the mass fraction of the fourth compound is 1% to 35%.

[0074] Further, the first compound is selected from at least one of the compounds shown in formulas I-1 to I-28:

[0075]

[0076]

[0077] In some embodiments, the third compound comprises at least one of the compounds shown in formulas (III-1), (III-2), and (III-3):

[0078] Among them, the compound shown in Formula III-1 has a higher clearing point, while the compounds shown in Formulas III-2 and III-3 have higher optical anisotropy.

[0079] Specifically, the third compound is selected from at least one of the compounds shown in formulas III-1-1 to III-1-14, III-2-1 to III-2-14, and III-3-1 to III-3-12:

[0080]

[0081]

[0082] In some embodiments, the fourth compound comprises at least one compound as shown in formulas (IV-1) and (IV-2):

[0083] Among them, the compound shown in Formula IV-1 has high negative dielectric anisotropy, and the compound shown in Formula IV-2 has high optical anisotropy.

[0084] Specifically, the fourth compound is selected from at least one of the compounds shown in formulas IV-1-1 to IV-1-12 and IV-2-1 to IV-2-12:

[0085]

[0086]

[0087] In some embodiments of this application, the liquid crystal composition further includes at least one fifth compound as shown in formula (V): R9, R 10 Each of the following groups, independently selected, is a group in which at least one H is substituted or unsubstituted by F, Cl, Br or I: an alkyl group having 1-10 carbon atoms, an alkoxy group having 1-10 carbon atoms, an alkenyl group having 2-10 carbon atoms, an alkenoxy group having 2-10 carbon atoms, an alkynyl group having 2-10 carbon atoms, or an alkynoxy group having 2-10 carbon atoms.

[0088] The fifth compound having the above formula V is a neutral single crystal, characterized by dielectric neutrality, low elastic constant, low clearing point, low rotational viscosity, and tunable optical anisotropy.

[0089] In some embodiments of this application, the liquid crystal composition further includes at least one sixth compound as shown in formula (VI): R 11 R 12Each of the following groups, independently selected, is a group in which at least one H is substituted or unsubstituted by F, Cl, Br or I: an alkyl group having 1-10 carbon atoms, an alkoxy group having 1-10 carbon atoms, an alkenyl group having 2-10 carbon atoms, an alkenoxy group having 2-10 carbon atoms, an alkynyl group having 2-10 carbon atoms, or an alkynoxy group having 2-10 carbon atoms.

[0090] The sixth compound having the above formula VI is a neutral single crystal, characterized by dielectric neutrality, low elastic constant, low clearing point, low rotational viscosity, and tunable optical anisotropy.

[0091] In some embodiments of this application, the liquid crystal composition further includes at least one seventh compound as shown in formula (VII): R 13 R 14 Each of the following groups, independently selected, is a group in which at least one H is substituted or unsubstituted by F, Cl, Br or I: an alkyl group having 1-10 carbon atoms, an alkoxy group having 1-10 carbon atoms, an alkenyl group having 2-10 carbon atoms, an alkenoxy group having 2-10 carbon atoms, an alkynyl group having 2-10 carbon atoms, or an alkynoxy group having 2-10 carbon atoms.

[0092] The seventh compound having the above formula VII is a neutral single crystal, characterized by dielectric neutrality, high elastic constant, high brightness, low rotational viscosity, and tunable optical anisotropy.

[0093] In some embodiments of this application, the liquid crystal composition further includes at least one eighth compound as shown in formula (VIII): R 15 R 16 Each of the following groups, independently selected, is a group in which at least one H is substituted or unsubstituted by F, Cl, Br or I: an alkyl group having 1-10 carbon atoms, an alkoxy group having 1-10 carbon atoms, an alkenyl group having 2-10 carbon atoms, an alkenoxy group having 2-10 carbon atoms, an alkynyl group having 2-10 carbon atoms, or an alkynoxy group having 2-10 carbon atoms.

[0094] The eighth compound having the above formula VIII is a neutral single crystal, characterized by dielectric neutrality, high elastic constant, high brightness, low rotational viscosity, and tunable optical anisotropy.

[0095] In some embodiments of this application, the liquid crystal composition further includes at least one ninth compound as shown in formula (IX): R 17 R 18Each of the following groups, independently selected, is a group in which at least one H is substituted or unsubstituted by F, Cl, Br or I: an alkyl group having 1-10 carbon atoms, an alkoxy group having 1-10 carbon atoms, an alkenyl group having 2-10 carbon atoms, an alkenoxy group having 2-10 carbon atoms, an alkynyl group having 2-10 carbon atoms, or an alkynoxy group having 2-10 carbon atoms.

[0096] The ninth compound having the above formula IX is a neutral single crystal, characterized by dielectric neutrality, high elastic constant, high brightness, low rotational viscosity, and tunable optical anisotropy.

[0097] Compared to cyclohexyl groups, an increase in the number of phenyl groups increases the optical anisotropy of the liquid crystal compound. Therefore, the optical anisotropy of the liquid crystal composition can be adjusted by regulating the proportions of the fifth, sixth, seventh, eighth, and ninth compounds in the liquid crystal composition.

[0098] In some embodiments of this application, the liquid crystal composition may further include at least one of the compounds represented by the following formula: Its properties are similar to those of the fifth, sixth, seventh, eighth, and ninth compounds mentioned above, and it is used to adjust the optical anisotropy of the liquid crystal composition.

[0099] In some embodiments of this application, the liquid crystal composition further includes at least one tenth compound as shown in formula (X): R 19 R 20 Each of the following groups, independently selected, is a group in which at least one H is substituted or unsubstituted by F, Cl, Br or I: an alkyl group having 1-10 carbon atoms, an alkoxy group having 1-10 carbon atoms, an alkenyl group having 2-10 carbon atoms, an alkenoxy group having 2-10 carbon atoms, an alkynyl group having 2-10 carbon atoms, or an alkynoxy group having 2-10 carbon atoms.

[0100] The tenth compound having the above formula X has the characteristics of moderate clearing point, high optical anisotropy, low dielectric anisotropy, moderate elastic constant, and moderate rotational viscosity, and can be used to adjust the overall clearing point, optical anisotropy, elastic constant, and rotational viscosity of liquid crystal compositions.

[0101] The liquid crystal composition in the embodiments of this application can be prepared by thermal dissolution method, specifically including: S10, weighing the liquid crystal compound according to the mass 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 low to high; S20, heating and stirring at 60-100℃ to fully dissolve and mix the components; S30, cooling to room temperature and encapsulating to obtain the target sample.

[0102] Tables 1 to 11 below show the component distribution and performance parameter measurements of the liquid crystal compositions of Examples 1-10 and Comparative Example 1 of this application, respectively. Temperature is in °C; Tni represents the clearing point of the liquid crystal composition (unit: °C); Δn represents the optical anisotropy at 25 °C, n e γ represents the refractive index of the unusual light; γ1 represents the rotational viscosity at 25°C (in mPa·s); Δε represents the dielectric anisotropy at 25°C, ε ⊥ K is the dielectric constant perpendicular to the long axis of the liquid crystal molecules. 11 K is the elastic coefficient of the warp. 33 is the bending elastic modulus.

[0103] Table 1

[0104]

[0105] Table 2

[0106]

[0107] Table 3

[0108]

[0109] Table 4

[0110]

[0111] Table 5

[0112]

[0113] Table 6

[0114]

[0115] Table 7

[0116]

[0117] Table 8

[0118]

[0119] Table 9

[0120]

[0121] Table 10

[0122]

[0123] Table 11

[0124]

[0125] Due to γ1 / K 11 The ratio of γ1 / K is positively correlated with the response time RT. 11 The larger the ratio, the slower the response time. As can be seen from Examples 1-10 and Comparative Example 1 above, the response time of the liquid crystal compositions of Examples 1-10 applied to the display panel is shorter than that of the liquid crystal composition of Comparative Example 1 applied to the display panel. The possible reason is that the liquid crystal compositions provided in the embodiments of this application simultaneously include the first compound, the second compound, the third compound, and the fourth compound, which can reduce the overall response time of the liquid crystal composition applied to the display panel.

[0126] Based on the above-described liquid crystal composition, embodiments of the present invention also provide a liquid crystal display panel 100, such as... Figure 1 As shown, the liquid crystal display panel 100 includes a first substrate 10, a second substrate 30, and a liquid crystal layer 20. The first substrate 10 and the second substrate 30 are disposed opposite to each other, and the liquid crystal layer 20 is sandwiched between the first substrate 10 and the second substrate 30. The first substrate 10 may be a thin-film transistor array substrate for driving the liquid crystal layer to emit light. The liquid crystal display panel also includes a color resist layer disposed on the side of the second substrate facing the first substrate to filter colors and achieve color display.

[0127] The material of the liquid crystal layer 20 includes the above-described liquid crystal composition, and the material of the liquid crystal layer 20 may further include other components, such as chiral agents, initiators, polymerization inhibitors, organic solvents, and other additives.

[0128] Furthermore, the color resist layer includes a red color resist, wherein the red pigment comprises water-soluble pigment with a mass fraction of less than or equal to 1.5% based on the total mass of the red pigment in the red color resist, and 90% of the pigment particles in the red pigment have a particle size of less than or equal to 100 nanometers. The smaller the particle size of the red pigment particles in the red color resist, the more beneficial it is to the uniform distribution of pigments and dyes, which can improve transmittance, reliability, and color gamut.

[0129] The liquid crystal composition comprising the first, second, third, and fourth compounds provided in this application has the characteristics of low viscosity, high optical anisotropy, and adjustable clearing point. By adjusting the mass ratio of these four compounds, the response time of the liquid crystal composition applied to a display panel can be adjusted. Alternatively, the response time of the liquid crystal composition can be improved by reducing the cell thickness (the height of the support pillars PS in the liquid crystal layer, 1.5-3.2 μm). However, reducing the cell thickness often results in a loss of transmittance. Therefore, by using a liquid crystal composition with high Δn and in conjunction with the aforementioned high-transmittance color resist, the transmittance of the panel can be effectively increased, meeting the requirements for fast response.

[0130] For LCD products aiming for low power consumption, the overall power consumption is typically reduced by increasing the transmittance of the LCD panel and decreasing the driving voltage. Therefore, such LCD panels can utilize a large cell thickness (with a PS height of 2.0-3.8 μm) and a high Δn liquid crystal composition to improve transmittance and reduce backlight loss. Additionally, the driving voltage can be reduced by increasing the dielectric anisotropy of the liquid crystal composition. Therefore, the liquid crystal composition with high Δn and high Δε characteristics, combined with the cell thickness described in this application, can meet the low power consumption requirements of LCD products.

[0131] The liquid crystal display panel can be used in electronic devices, which include the aforementioned display panel, as well as earpieces, cameras, optical fingerprint recognition devices, etc. These electronic devices include, but are not limited to, mobile phones, televisions, computers, tablets, watches, etc. The liquid crystal composition is suitable for electronic devices of various types, such as VA, ECB, PALC, FFS, or IPS.

[0132] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0133] The liquid crystal composition and liquid crystal display panel provided in the embodiments of the present invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of the present invention. Those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A liquid crystal composition, characterized by comprising include: At least one first compound as shown in formula (I): （I）； at least one second compound as shown in formula (II): (II); at least one third compound of formula (III): (III); and at least one fourth compound of formula (IV): (IV); Where X is selected from O or S; m, n, o, and p are independently selected from 1; and Same, and selected from or ; , as well as Each independently selected or ; Z is selected from a single bond or -CH2-CH2-; W is selected from a single bond or -CH2O-; R1, R2, R3, R4, R5 and R7 are each independently selected from alkyl groups having 1 to 15 carbon atoms, alkoxy groups having 1 to 15 carbon atoms, and alkenyl groups having 2 to 15 carbon atoms. R6 and R8 are each independently selected from alkoxy groups having 1-15 carbon atoms.

2. The liquid crystal composition according to claim 1, characterized in that, The third compound includes at least one of the compounds shown in formulas (III-1), (III-2), and (III-3): (III-1); (III-2); (III-3)。 3. The liquid crystal composition according to claim 2, characterized in that, The third compound is selected from at least one of the compounds shown in formulas III-1-1 to III-1-14, III-2-1 to III-2-14, and III-3-1 to III-3-12: 。 4. The liquid crystal composition according to claim 1, characterized in that, The fourth compound includes at least one compound as shown in formula (IV-1) and (IV-2): (IV-1); (IV-2)。 5. The liquid crystal composition according to claim 4, characterized in that, The fourth compound is selected from at least one of the compounds shown in formulas IV-1-1 to IV-1-12 and IV-2-1 to IV-2-12: 。 6. The liquid crystal composition according to claim 1, characterized in that, The first compound is selected from at least one of the compounds shown in Formula I-2, Formula I-10 and Formula I-16: 。 7. The liquid crystal composition according to claim 1, characterized in that, Based on the total mass of the liquid crystal composition, the mass fraction of the first compound is 1% to 30%, the mass fraction of the second compound is 5% to 70%, the mass fraction of the third compound is 1% to 45%, and the mass fraction of the fourth compound is 1% to 50%.

8. The liquid crystal composition according to claim 1, characterized in that, The liquid crystal composition further includes: At least one fifth compound as shown in formula (V): (V); And / or, at least one sixth compound as shown in formula (VI): (VI); And / or, at least one seventh compound as shown in formula (VII): (VII); And / or, at least one eighth compound as shown in formula (VIII): (VIII); And / or, at least one ninth compound as shown in formula (IX): (IX); wherein R9, R 10 , R 11 , R 12 , R 13 , R 14 , R 15 , R 16 , R 17 and R 18 are each independently selected from at least one of H substituted or unsubstituted by F, Cl, Br or I, alkyl having 1-10 carbon atoms, alkoxy having 1-10 carbon atoms, alkenyl having 2-10 carbon atoms, alkenyloxy having 2-10 carbon atoms, alkynyl having 2-10 carbon atoms or alkynyloxy having 2-10 carbon atoms.

9. A liquid crystal display panel, characterized in that, The device includes a first substrate and a second substrate disposed opposite to each other, and a liquid crystal layer sandwiched between the first substrate and the second substrate, the liquid crystal layer comprising the liquid crystal composition as described in any one of claims 1 to 8.

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