Liquid crystal composition and liquid crystal display element and liquid crystal display comprising the same

Abstract

The application discloses a liquid crystal composition and a liquid crystal display element and a liquid crystal display comprising the same, and the liquid crystal composition comprises component A, component B, component C and component D, wherein the component A is selected from one or two of a group consisting of compounds shown in formula I-1 and I-2, the component B is selected from one or more of compounds shown in formula II, the component C is selected from one or more of a group consisting of compounds shown in formula III-1, III-2 and III-3, and the component D is selected from one or more of compounds shown in formula IV. The technical scheme provided in the application can simultaneously solve the problems of the liquid crystal display element or the liquid crystal display, such as serious stain phenomenon, poor low-temperature solubility and slow response speed. I-1 I-2 II III-1 III-2 III-3 IV.

Description

Technical Field

[0001] This invention relates to the field of liquid crystal display technology. More specifically, it relates to a liquid crystal composition and a liquid crystal display element or liquid crystal display comprising the same. Background Technology

[0002] Liquid crystal materials, as important electro-optic functional materials, began their modern application in the mid-20th century. In 1968, scientists at RCA in the United States first discovered the electro-optic effect of liquid crystals and developed the first liquid crystal display based on dynamic scattering modes, marking the formal birth of liquid crystal display technology. Since then, liquid crystal materials have undergone an evolution from simple host-guest type, twisted nematic type to super-twisted nematic type, laying a solid foundation for the development of modern display technology.

[0003] Among numerous liquid crystal display technologies, Thin Film Transistor (TFT) active-matrix liquid crystal display technology has become the mainstream in the market due to its superior performance. Compared with traditional passive-matrix liquid crystal displays, TFT liquid crystal display technology uses independent thin-film transistors to control each sub-pixel, resulting in higher contrast, faster response speed, higher resolution, and better image quality, perfectly meeting the high requirements of video display and dynamic images.

[0004] Based on the different orientations of liquid crystal molecules and the modes of electric field application, TFT liquid crystal technology can be divided into several modes. These mainly include: Twisted Nematic (TN) mode, In-Plane Switching (IPS) mode, Edge Field Switching (FFS) mode, and Vertical Alignment (VA) mode. Among them, the FFS mode generates an edge electric field through a special electrode design, causing the liquid crystal molecules to rotate within the substrate plane, thereby achieving ultra-wide viewing angles, high transmittance, and excellent color performance, and has become the mainstream technology solution for high-end display devices.

[0005] However, while FFS (Fringe Field Switching) mode boasts numerous superior performance characteristics, display defects are also particularly prominent in actual production and application. Common display defects mainly include: image sticking, which is related to charge trapping in the alignment layer and asymmetric aggregation of ionic impurities in the liquid crystal material under an electric field; flicker, usually caused by feedthrough effect due to mismatch between the common electrode voltage (Vcom) and the pixel voltage; and mura, which mostly originates from uneven film thickness, poor cell thickness control, or foreign object intrusion in the color filter or TFT array process. In addition to the above problems, another display defect—"stains"—also seriously affects display quality and user experience. This display defect manifests as horizontal or vertical display unevenness, and the stain spreads more severely with deteriorating aging conditions.

[0006] As display performance requirements continue to rise, higher demands are being placed on the response speed, stability, and operating temperature range of liquid crystal materials. Improvements in liquid crystal material performance are often accompanied by decreased low-temperature solubility, making them prone to crystallization or phase separation at low temperatures. This can lead to display malfunctions, permanent damage, and performance degradation, severely limiting their application in wide-temperature environments.

[0007] In recent years, to meet the demands of high-end applications such as virtual reality, high dynamic range displays, and high-speed video playback, the pursuit of fast response in FFS-TFT liquid crystal technology has become increasingly urgent. Fast response not only reduces motion blur but also significantly improves display smoothness. The response speed of a liquid crystal display is directly related to the parameters of the liquid crystal material: the lower the rotational viscosity of the liquid crystal material, the lower the rotational resistance of the liquid crystal molecules, and the faster the response speed; the larger the elastic constant, the stronger the molecular restoring force, and the faster the response speed. However, improving the response speed may be accompanied by a series of problems such as increased driving voltage, decreased voltage retention rate (VHR) leading to increased image retention, and poor low-temperature solubility. Balancing these mutually restrictive performance indicators has become an important research direction in the current development of liquid crystal materials. Summary of the Invention

[0008] Based on this, the purpose of the present invention is to provide a liquid crystal composition and a liquid crystal display element or liquid crystal display containing the same, which can simultaneously solve the problems of severe "staining" phenomenon, poor low-temperature solubility and slow response speed of the above-mentioned liquid crystal display elements or liquid crystal displays.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] On one hand, the present invention provides a liquid crystal composition comprising component A, component B, component C, and component D, wherein:

[0011] Component A is selected from one or two of the groups consisting of compounds shown in Formula I-1 and I-2.

[0012] Ⅰ-1 Ⅰ-2

[0013] Component B is selected from one or more compounds shown in Formula II.

[0014] II

[0015] Component C is selected from one or more compounds in the group consisting of compounds represented by formulas III-1, III-2, and III-3.

[0016] Ⅲ-1 Ⅲ-2

[0017] Ⅲ-3

[0018] Component D is selected from one or more compounds shown in Formula IV.

[0019] IV

[0020] in,

[0021] R1, R2, R3, R4, and R5 each independently represent an alkyl chain with 1-10 carbon atoms;

[0022] R6 represents an alkenyl group with 2-10 carbon atoms;

[0023] R7 represents an alkyl group having 1-10 carbon atoms or an alkoxy group having 1-10 carbon atoms;

[0024] express , or ;

[0025] Z1 represents a single bond, -CH2O-, or -CH2CH2-;

[0026] m represents 0 or 1.

[0027] In a second aspect, the present invention provides a liquid crystal display element comprising the liquid crystal composition described in the first aspect above.

[0028] Thirdly, the present invention provides a liquid crystal display, characterized in that the liquid crystal display comprises the liquid crystal composition described in the first aspect above.

[0029] The beneficial effects of this invention are as follows:

[0030] The liquid crystal composition provided by this invention has high orderliness, good low-temperature solubility, and fast response speed. This liquid crystal composition can be used to develop wide-temperature, fast-response liquid crystal components, and is less susceptible to interference from external process fluctuations, effectively improving liquid crystal display elements or liquid crystal displays with poor "stain" display. Detailed Implementation

[0031] To more clearly illustrate the present invention, the following description, in conjunction with preferred embodiments, further clarifies the invention. Those skilled in the art should understand that the specific descriptions below are illustrative rather than restrictive, and should not be construed as limiting the scope of protection of the present invention.

[0032] According to a specific embodiment of the present invention, a liquid crystal composition is provided, characterized in that the liquid crystal composition comprises component A, component B, component C, and component D, wherein:

[0033] Component A is selected from one or two of the groups consisting of compounds shown in Formula I-1 and I-2.

[0034] Ⅰ-1 Ⅰ-2

[0035] Component B is selected from one or more compounds shown in Formula II.

[0036] II

[0037] Component C is selected from one or more compounds in the group consisting of compounds represented by formulas III-1, III-2, and III-3.

[0038] Ⅲ-1 Ⅲ-2

[0039] Ⅲ-3

[0040] Component D is selected from one or more compounds shown in Formula IV.

[0041] IV

[0042] in,

[0043] R1, R2, R3, R4, and R5 each independently represent an alkyl chain with 1-10 carbon atoms;

[0044] R6 represents an alkenyl group with 2-10 carbon atoms;

[0045] R7 represents an alkyl group having 1-10 carbon atoms or an alkoxy group having 1-10 carbon atoms;

[0046] express , or ;

[0047] Z1 represents a single bond, -CH2O-, or -CH2CH2-;

[0048] m represents 0 or 1.

[0049] In some examples, the content of component A in the liquid crystal composition, by mass percentage, includes, but is not limited to, 1-20%, 1-15%, 1-10%, 3-15%, 3-10%, 3-5%, 5-10%, etc.

[0050] In some specific examples, component B is selected from one or more compounds grouped together with those shown in formulas II-1 to II-3.

[0051] II-1 II-2

[0052] II-3.

[0053] In some preferred examples, component B is preferably the compound shown in formula II-1.

[0054] In some examples, the content of component B in the liquid crystal composition, by mass percentage, includes, but is not limited to, 1-40%, 5-40%, 5-30%, 5-20%, 5-15%, etc.

[0055] In some examples, component C is selected from one or more compounds grouped together with those shown in formulas III-1-1 to III-3-1.

[0056] Ⅲ-1-1 Ⅲ-1-2

[0057] Ⅲ-1-3 Ⅲ-2-1

[0058] Ⅲ-2-2 Ⅲ-2-3

[0059] Ⅲ-3-1.

[0060] In some preferred examples, component C is selected from one or more of the compounds shown in formulas III-1-3, III-2-1, III-2-2, and III-3-1.

[0061] In some examples, the content of component C in the liquid crystal composition, by mass percentage, includes, but is not limited to, 1-40%, 5-40%, 10-40%, 10-35%, 15-35%, 15-30%, 20-35%, 30-35%, etc.

[0062] In some examples, component D is selected from one or more compounds grouped together with those shown in formulas IV-1 to IV-8.

[0063] IV-1 IV-2

[0064] IV-3 IV-4

[0065] IV-5 IV-6

[0066] IV-7 IV-8

[0067] Among them, R 61 This indicates CH3-CH=CH- or CH2=CH-.

[0068] In some preferred examples, the compound represented by Formula IV is selected from one or more of the compounds represented by Formulas IV-2, IV-4, IV-6 and IV-7.

[0069] In some examples, the content of component D in the liquid crystal composition, by mass percentage, includes, but is not limited to, 1-70%, 1-60%, 5-60%, etc.

[0070] In some preferred examples, the liquid crystal composition comprises, by weight percentage: 1-20% component A, 1-40% component B, 1-40% component C and 1-70% component D.

[0071] In some more preferred examples, the liquid crystal composition comprises, by weight percentage: 1-15% component A, 5-40% component B, 10-40% component C and 1-60% component D.

[0072] In some examples, the liquid crystal composition comprises one or more compounds of formula V.

[0073] V

[0074] R8 represents an alkyl chain with 1-10 carbon atoms.

[0075] R9 represents an alkyl group having 1-10 carbon atoms or an alkoxy group having 1-10 carbon atoms;

[0076] express , or ;

[0077] Z2 represents a single bond, -CH2O-, or -CH2CH2-;

[0078] n represents 0 or 1.

[0079] In some specific examples, the compound represented by formula V is selected from one or more compounds in the group consisting of compounds represented by formulas V-1 to V-8.

[0080] V-1 V-2

[0081] V-3 V-4

[0082] V-5 V-6

[0083] V-7 V-8.

[0084] In some preferred examples, the compound shown in formula V is preferably one or more of the compounds shown in formula V-2, V-4, V-6 and V-7.

[0085] In some examples, the content of the compound represented by formula V in the liquid crystal composition, by mass percentage, includes, but is not limited to, 0-70%, 0-30%, 10-30%, 15-30%, etc. Furthermore, preferably, the total mass percentage of component D and the compound represented by formula V in the liquid crystal composition is 20-70%, more preferably 30-70%, 30-60%, etc.

[0086] In some examples, the liquid crystal composition comprises one or more compounds of formula VI.

[0087] VI

[0088] Among them, R 10 R 11 Each can be independently represented as an alkyl group having 1-10 carbon atoms, an alkenyl group having 2-10 carbon atoms, or an alkoxy group having 1-10 carbon atoms;

[0089] express , or .

[0090] In some specific examples, the compound represented by formula VI is selected from one or more compounds in the group consisting of compounds represented by formulas VI-1 to VI-15.

[0091] VI-1 VI-2

[0092] VI-3 VI-4

[0093] VI-5 VI-6

[0094] VI-7 VI-8

[0095] VI-9 VI-10

[0096] VI-11 VI-12

[0097] VI-13 VI-14

[0098] VI-15.

[0099] In some preferred examples, the compound represented by formula VI is preferably one or more of the compounds represented by formulas VI-1, VI-2, VI-5, VI-12 and VI-15.

[0100] In some examples, the content of the compound represented by Formula VI in the liquid crystal composition, by mass percentage, includes, but is not limited to, 0, 0-30%, 0-20%, 5-30%, 5-20%, etc.

[0101] In some examples, the liquid crystal composition comprises one or more compounds represented by formula VII.

[0102] VII

[0103] Among them, R 12 R 13 Each of the following independently represents an alkyl chain having 1-10 carbon atoms or an alkoxy chain having 1-10 carbon atoms, wherein one or more unconnected -CH2- are optionally substituted with cyclopropyl, cyclobutyl, cyclopentyl or cyclopentenyl.

[0104] W1 represents -O-, -S-, -CH2O-, or -CH=CH-.

[0105] In some preferred examples, the compound represented by formula VII is selected from the group consisting of compounds represented by formulas VII-1 to VII-6.

[0106] VII-1 VII-2

[0107] VII-3 VII-4

[0108] VII-5 VII-6.

[0109] In some preferred examples, the compound represented by formula VII is preferably at least one of the compounds represented by formula VII-1, VII-2 and VII-4.

[0110] In some examples, the content of the compound represented by formula VII in the liquid crystal composition, by mass percentage, includes, but is not limited to, 0, 0-20%, 0-15%, 5-15%, etc.

[0111] In some examples, the liquid crystal composition comprises one or more compounds represented by formula VIII-1 and / or VIII-2.

[0112] VIII-1

[0113] VIII-2.

[0114] In some preferred examples, the content of the compound represented by formula VIII-1 and / or VIII-2 in the liquid crystal composition, by mass percentage, includes, but is not limited to, 0, 0-20%, 0-15%, 5-15%, 5-10%, etc.

[0115] Another specific embodiment of the present invention relates to a liquid crystal display element comprising any of the above-described liquid crystal compositions.

[0116] For example, the liquid crystal display element is an active matrix display element or a passive matrix display element.

[0117] In some examples, the liquid crystal display element is preferably an active matrix addressing liquid crystal display element.

[0118] Another specific embodiment of the present invention relates to a liquid crystal display comprising any of the above-described liquid crystal compositions.

[0119] For example, the liquid crystal display is an active matrix display or a passive matrix display.

[0120] In some examples, the liquid crystal display is preferably an active matrix addressing liquid crystal display. Exemplary active matrix display elements or displays include, but are not limited to, IPS-TFT, FFS-TFT, or VA-TFT liquid crystal display elements or other TFT displays.

[0121] Various functional additives can be added to the liquid crystal compound provided in this embodiment. The mass percentage of each additive is relative to the total mass of all liquid crystal compounds excluding the additives. The mass percentage of exemplary additives is preferably between 0.01-2 wt%. These additives are mainly chiral agents, antioxidants, light stabilizers, polymerizable monomers, self-aligning agents, etc.

[0122] Exemplary antioxidant and light stabilizer additives are selected from the following compounds:

[0123]

[0124]

[0125] Exemplary polymerizable monomer additives are selected from the following compounds:

[0126]

[0127]

[0128] .

[0129] The technical solution of the present invention will be described below with reference to some specific embodiments.

[0130] In this invention, the preparation methods are all conventional unless otherwise specified, and the raw materials used can be obtained from publicly available commercial sources unless otherwise specified. The reaction process is generally monitored by TLC. The post-reaction treatment generally includes water washing, extraction, drying after combining organic phases, solvent removal under reduced pressure, recrystallization, and column chromatography. Those skilled in the art can implement this invention according to the following description.

[0131] All percentages in this instruction manual refer to mass percentages, and temperatures are in degrees Celsius (°C). The specific meanings of other symbols and test conditions are as follows:

[0132] Tni represents the liquid crystal clearing point (°C), measured by DSC quantitative method;

[0133] Δn represents optical anisotropy, Δn = n e -n o , where n o Let n be the refractive index of ordinary light. e The refractive index of unusual light was measured at 25±2℃, 589nm, using an Abbe refractometer.

[0134] Δε represents dielectric anisotropy, Δε = ε ∥ -ε ⊥ , where ε ∥ ε is the dielectric constant parallel to the molecular axis. ⊥ The dielectric constant is perpendicular to the molecular axis. The test conditions are 25±0.5℃, 20-micron vertical cell, and INSTEC:ALCT-IR1 test.

[0135] γ1 represents rotational viscosity (mPa·s), and the test conditions are 25±0.5℃, 20-micron vertical cell, INSTEC:ALCT-IR1 test;

[0136] K 11 K is the elastic constant of the development. 33The bending elastic constant was determined under the following test conditions: 25°C, INSTEC:ALCT-IR1, and a 20-micron vertical box.

[0137] τ represents the response time (ms), and the testing instrument is a DMS. 501, the test conditions are 25±0.5℃, the test box is an FFS test box, and the cell gap is 3.6 micrometers;

[0138] Low-temperature observation conditions: Pour 1g of liquid crystal into a 5ml clean glass bottle, seal the bottle and place it in a -30℃ low-temperature freezer. Observe whether crystal precipitation occurs in the liquid crystal every 24 hours, and continue observation for 240 hours.

[0139] Orderliness: The orderliness (Order Parameter) of a liquid crystal is usually represented by the symbol S, and the calculation formula is as follows:

[0140] S = (3cos²θ–1) / 2

[0141] Where θ is the angle between the molecular long axis and the pointer n.

[0142] The degree of order in this invention is obtained by measuring the refractive index. The higher the value, the higher the degree of order and the less severe the staining.

[0143] Stain evaluation method: Liquid crystal was injected into the test cell, which was then divided into left and right regions for separate power control. The left side was powered by the L255 voltage, while the right side was shorted to Vcom (grounded) to achieve a black and white image display. The test cell was placed in an oven and aged at 60℃ for 240 hours. The severity of stains was observed, and the stain evaluation levels are shown in Table 1 below.

[0144] Table 1

[0145]

[0146] The preparation method of the liquid crystal composition is as follows: Weigh each liquid crystal monomer according to a certain ratio and put it into a stainless steel beaker. Place the stainless steel beaker containing each liquid crystal monomer on a magnetic stirrer and heat it to melt. After most of the liquid crystal monomer in the stainless steel beaker has melted, add a magnetic rotor to the stainless steel beaker and stir the mixture evenly. After cooling to room temperature, the liquid crystal composition is obtained.

[0147] The liquid crystal monomer structure in the embodiments of the present invention is represented by code. The code representation methods of liquid crystal ring structure, end group and linking group are shown in Table 2 and Table 3 below.

[0148] Table 2 Corresponding codes for ring structures

[0149]

[0150] Table 3. Correspondence codes between terminal groups and linking groups

[0151]

[0152] For example:

[0153] Its code is COY-3-O2;

[0154] Its code is PP-5-3;

[0155] Its code is CY-3-O2;

[0156] Its code is CC-Cp-V1;

[0157] Its code is PGP-Cpr1-2.

[0158] Its code is Sc-Cp(3-ene)O-O4.

[0159] Example 1

[0160] The formulation and physical properties of the liquid crystal composition are shown in Table 4 below.

[0161] Table 4 Formulation and physical properties of the liquid crystal composition in Example 1

[0162]

[0163] Example 2

[0164] The formulation and physical properties of the liquid crystal composition are shown in Table 5 below.

[0165] Table 5 Formulation and physical properties of the liquid crystal composition in Example 2

[0166]

[0167] Example 3

[0168] The formulation and physical properties of the liquid crystal composition are shown in Table 6 below.

[0169] Table 6 Formulation and physical properties of the liquid crystal composition in Example 3

[0170]

[0171] Example 4

[0172] The formulation and physical properties of the liquid crystal composition are shown in Table 7 below.

[0173] Table 7 Formulation and physical properties of the liquid crystal composition in Example 4

[0174]

[0175] Example 5

[0176] The formulation and physical properties of the liquid crystal composition are shown in Table 8 below.

[0177] Table 8 Formulation and physical properties of the liquid crystal composition in Example 5

[0178]

[0179] Example 6

[0180] The formulation and physical properties of the liquid crystal composition are shown in Table 9 below.

[0181] Table 9 Formulation and physical properties of the liquid crystal composition in Example 6

[0182]

[0183] Comparative Example 1

[0184] The formulation and physical properties of the liquid crystal composition of Comparative Example 1 are shown in Table 10 below. The only difference between the formulation of the liquid crystal composition of Comparative Example 1 and Example 1 is that the compound shown in Formula I is replaced with CC-3-O1.

[0185] Table 10 Comparative Example 1: Liquid Crystal Composition Formulation and Physical Properties

[0186]

[0187] Comparative Example 2

[0188] The formulation and physical properties of the liquid crystal composition of Comparative Example 2 are shown in Table 11 below. The only difference between the formulation of the liquid crystal composition of Comparative Example 2 and Example 1 is that the compound shown in Formula II is replaced with the compound shown in Formula III, CC-2-3.

[0189] Table 11 Comparative Example 2: Liquid Crystal Composition Formulation and Physical Properties

[0190]

[0191] Comparative Example 3

[0192] The formulation and physical properties of the liquid crystal composition of Comparative Example 3 are shown in Table 12 below. The only difference between the formulation of the liquid crystal composition of Comparative Example 3 and Example 1 is that the compounds shown in Formula III-1 and Formula III-2 are replaced with the compound shown in Formula II.

[0193] Table 12 Comparative Example 3: Liquid Crystal Composition Formulation and Physical Properties

[0194]

[0195] Comparative Example 4

[0196] The formulation and physical properties of the liquid crystal composition of Comparative Example 4 are shown in Table 13 below. The only difference between the formulation of the liquid crystal composition of Comparative Example 4 and Example 1 is that the compound shown in Formula IV is replaced with the compound shown in Formula V.

[0197] Table 13 Comparative Example 4: Liquid Crystal Composition Formulation and Physical Properties

[0198]

[0199] Comparative Example 5

[0200] The formulation and physical properties of the liquid crystal composition of Comparative Example 5 are shown in Table 14 below. The only difference between the formulation of the liquid crystal composition of Comparative Example 5 and Example 6 is that the compound shown in Formula I is replaced with the compound shown in Formula II.

[0201] Table 14 Comparative Example 5: Liquid Crystal Composition Formulation and Physical Properties

[0202]

[0203] Comparative Example 6

[0204] The formulation and physical properties of the liquid crystal composition of Comparative Example 6 are shown in Table 15 below. The only difference between the formulation of the liquid crystal composition of Comparative Example 6 and Example 6 is that the compound shown in Formula II is replaced with the compound shown in Formula III-1.

[0205] Table 15 Comparative Example 6 Liquid Crystal Composition Formulation and Physical Properties

[0206]

[0207] Comparative Example 7

[0208] The formulation and physical properties of the liquid crystal composition of Comparative Example 7 are shown in Table 16 below. The only difference between the formulation of the liquid crystal composition of Comparative Example 7 and Example 1 is that the compounds shown in Formula III-1 and III-2 are replaced with the compounds shown in Formula II and Formula VI.

[0209] Table 16 Comparative Example 7 Liquid Crystal Composition Formulation and Physical Properties

[0210]

[0211] Comparative Example 8

[0212] The formulation and physical properties of the liquid crystal composition of Comparative Example 8 are shown in Table 17 below. The only difference between the formulation of the liquid crystal composition of Comparative Example 8 and Example 6 is that the compound shown in Formula IV is replaced with the compound shown in Formula V.

[0213] Table 17 Comparative Example 8 Liquid Crystal Composition Formulation and Physical Properties

[0214]

[0215] The orderliness data and staining level results of the liquid crystal compositions in the above embodiments and comparative examples are shown in Table 18 below.

[0216] Table 18 Orderliness data and stain grades for Examples 1-6 and Comparative Examples 1-8

[0217]

[0218] By comparing Examples 1-6 with Comparative Examples 1-8, it can be seen that the liquid crystal composition disclosed in this invention has higher order and lower staining level.

[0219] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. For those skilled in the art, other variations or modifications can be made based on the above description. It is impossible to exhaustively list all the implementation methods here. All obvious variations or modifications derived from the technical solutions of the present invention are still within the protection scope of the present invention.

Claims

1. A liquid crystal composition, characterized in that, The liquid crystal composition comprises, by weight percentage, 1-15% component A, 5-20% component B, 20-35% component C, and 5-60% component D, wherein: Component A is selected from one or two of the groups consisting of compounds shown in Formula I-1 and I-2. Ⅰ-1 Ⅰ-2 Component B is selected from one or more compounds shown in Formula II. Ⅱ Component C is selected from one or more compounds in the group consisting of compounds represented by formulas III-1, III-2, and III-3. Ⅲ-1 Ⅲ-2 Ⅲ-3 Component D is selected from one or more compounds shown in Formula IV. Ⅳ in, R1, R2, R3, R4, and R5 each independently represent an alkyl chain with 1-10 carbon atoms; R6 represents an alkenyl group with 2-10 carbon atoms; R7 represents an alkyl group having 1-10 carbon atoms or an alkoxy group having 1-10 carbon atoms; express , or ; Z1 represents a single bond, -CH2O-, or -CH2CH2-; m represents 0 or 1.

2. The liquid crystal composition according to claim 1, characterized in that, The liquid crystal composition comprises one or more compounds represented by formula V. Ⅴ R8 represents an alkyl chain with 1-10 carbon atoms. R9 represents an alkyl group having 1-10 carbon atoms or an alkoxy group having 1-10 carbon atoms; express , or ; Z2 represents a single bond, -CH2O-, or -CH2CH2-; n represents 0 or 1; and / or The liquid crystal composition comprises one or more compounds of formula VI. Ⅵ Among them, R 10 R 11 Each can be independently represented as an alkyl group having 1-10 carbon atoms, an alkenyl group having 2-10 carbon atoms, or an alkoxy group having 1-10 carbon atoms; express , or ; and / or The liquid crystal composition comprises one or more compounds represented by formula VII. Ⅶ Among them, R 12 R 13 Each of the following independently represents an alkyl chain having 1-10 carbon atoms or an alkoxy chain having 1-10 carbon atoms, wherein one or more unconnected -CH2- are optionally substituted with cyclopropyl, cyclobutyl, cyclopentyl or cyclopentenyl. W1 represents -O-, -S-, -CH2O-, or -CH=CH-.

3. The liquid crystal composition according to claim 2, characterized in that, The liquid crystal composition comprises 0-70% of the compound shown in Formula V by mass percentage; and the total mass percentage of component D and the compound shown in Formula V is 20-70%.

4. The liquid crystal composition according to claim 2, characterized in that, The liquid crystal composition contains 0-30% of the compound shown in Formula VI by weight percentage.

5. The liquid crystal composition according to claim 2, characterized in that, The liquid crystal composition contains 0-20% of the compound shown in Formula VII, by weight percentage.

6. The liquid crystal composition according to claim 1, characterized in that, The liquid crystal composition comprises one or more compounds represented by formula VIII-1 and / or VIII-2. Ⅷ-1 Ⅷ-2。 7. A liquid crystal display element, characterized in that, The liquid crystal composition comprising any one of claims 1-6.

8. A liquid crystal display, characterized in that, The liquid crystal composition comprising any one of claims 1-6.

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