Liquid crystal composition and liquid crystal display panel

Abstract

This invention provides a liquid crystal composition and a liquid crystal display panel. The liquid crystal composition comprises one or more compounds represented by the specified compounds; wherein m and n are independently 0, 1, 2, or 3; L1 and L2 are independently H, F, Cl, Br, I, CN, or an alkyl group having 1-15 carbon atoms; R1 and R2 are independently H, F, Cl, Br, I, CN, SCN, NCS, SF5, or an alkyl or alkoxy group having 1-15 carbon atoms, or an alkenyl, alkenyloxy, alkynyl, or alkynyloxy group having 2-15 carbon atoms; Z1 and each Z2 are independently single bonds, -O-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O-, or -OCH2-, and each is independently or

Description

Technical Field

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

[0002] With the development of display technology, flat panel display devices such as liquid crystal displays (LCDs) have become the mainstream display devices due to their advantages such as high image quality, power saving, thin body and wide range of applications. They are widely used in various consumer electronic products such as mobile phones, televisions, personal digital assistants, digital cameras, laptops, and desktop computers.

[0003] To meet the requirements of various consumer electronics products, the liquid crystal materials used in display elements and devices for IPS, FFS, and VA display modes must have the following characteristics: ① Low driving voltage: the liquid crystal material has a large dielectric anisotropy; ② Fast response: the liquid crystal material has low viscosity and a large elastic coefficient; ③ High temperature resistance: the liquid crystal material has a high clearing point; ④ High contrast: the liquid crystal material has suitable optical anisotropy and dielectric negative.

[0004] To achieve better display results, the contrast ratio, response time, and other performance characteristics of existing LCD panels need to be further improved. Summary of the Invention

[0005] This invention provides a liquid crystal composition and a liquid crystal display panel to improve the contrast, response time and other performance characteristics of the liquid crystal display panel.

[0006] To solve the above problems, the technical solution provided by the present invention is as follows:

[0007] This invention provides a liquid crystal composition comprising one or more compounds represented by Formula I:

[0008]

[0009] Where m and n are independent of each other and are 0, 1, 2 or 3;

[0010] L1 and L2 are independently H, F, Cl, Br, I, CN, or alkyl groups having 1-15 carbon atoms;

[0011] Z1 and Z2 are independently single bonds, -O-, -S-, -SO2-, -CO-, -C(O)O-, -OC(O)-, -OC(O)O-, -CF2O-, -OCF2-, -CH2CH2-, -CF2CF2-, -CF2CH2-, -CH2CF2-, -CHF-CHF-, -CH2O-, -OCH2-, -CF=CH-, -CH=CF-, -CF=CF-, -CH=CH-, or -C≡C-; the H in Z1 and Z2 is zero-substituted, mono-substituted, or poly-substituted by F, Cl, Br, or I;

[0012] Each And each Independent of each other The and stated The H in the H is substituted by F, Cl, or Br, either zero, monosubstituted, or polysubstituted.

[0013] R1 and R2 are independently H, F, Cl, Br, I, CN, SCN, NCS, SF5, or alkyl or alkoxy groups having 1-15 carbon atoms, or alkenyl, alkenyloxy, alkynyl, or alkynyloxy groups having 2-15 carbon atoms; the terminal groups of R1 and R2 are zero-substituted or mono-substituted by H, CN, or CF3, and the CH2 groups in R1 and R2 are replaced by -O-, -S-, -SO2-, -CO-, or -C. (O)O-, -OC(O)-, -OC(O)O-, -CF2O-, -OCF2-, -CH2CH2-, -CF2CF2-, -CF2CH2-, -CH2CF2-, -CHF-CHF-, -CH2O-, -OCH2-, -CF=CH-, -CH=CF-, -CF=CF-, -CH=CH- or -C≡C- zero substitution, mono substitution, or substitution, and prevent heteroatoms from being directly bonded.

[0014] Optionally, in some embodiments of the present invention, L1 and L2 are independently H and F.

[0015] Optionally, in some embodiments of the present invention, both L1 and L2 are F.

[0016] Optionally, in some embodiments of the present invention, Z1 and Z2 are independently single bonds, -O-, -CF2O-, -OCF2-, -CH2O-, and -OCH2-.

[0017] Optionally, in some embodiments of the present invention, the compound represented by Formula I is selected from one or more compounds represented by the following sub-formulas I-1 to I-27; specifically, sub-formulas I-1 to I-27 are:

[0018]

[0019]

[0020] Wherein, R1 and R2 are independently H, F, or alkyl or alkoxy groups having 1-7 carbon atoms, or alkenyl, alkenyloxy, alkynyl or alkynyloxy groups having 2-7 carbon atoms, and one or both CH2 groups of R1 and R2 are replaced by -O-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2O-, -OCH2- and the heteroatoms are not directly bonded; the alkyl or alkoxy group is preferably a straight-chain compound having 1-7 carbon atoms.

[0021] Optionally, in some embodiments of the present invention, the compound represented by Formula I is selected from one or more of the following sub-formulas IA-1 to IA-27, specifically:

[0022]

[0023] Optionally, in some embodiments of the present invention, the liquid crystal composition further includes a neutral monomer, the neutral monomer comprising any one or more compounds represented by formulas II1 to II9; formulas II1 to II9 specifically are:

[0024]

[0025] R3 and R4 are independently alkyl or alkoxy groups having 1-10 carbon atoms, or alkenyl, alkenyloxy, alkynyl or alkynyloxy groups having 2-10 carbon atoms; the H atoms in R3 and R4 are zero-substituted, mono-substituted or poly-substituted by F, Cl, Br or I.

[0026] Optionally, in some embodiments of the present invention, the liquid crystal composition further includes a polar monomer, the polar monomer comprising any one or more compounds represented by formulas III1 to III5; formulas III1 to III5 specifically are:

[0027]

[0028] R5 and R6 are independently alkyl or alkoxy groups having 1-10 carbon atoms, or alkenyl, alkenyloxy, alkynyl or alkynyloxy groups having 2-10 carbon atoms; the H atoms in R5 and R6 are zero-substituted, mono-substituted or poly-substituted by F, Cl, Br or I.

[0029] Optionally, in some embodiments of the present invention, the liquid crystal composition includes The The The The The The The The The The The weight percentages are 30%, 8%, 13%, 5%, 8%, 6%, 10%, 6%, 8%, and 6%, respectively; or

[0030] The liquid crystal composition includes The The The The The The The The The The The The weight percentages are 18%, 11%, 5%, 11%, 8%, 6%, 7%, 6%, 7%, 7%, and 14% respectively; or,

[0031] The liquid crystal composition includes The The The The The The The The The The The The weight percentages are 35%, 5%, 10%, 8%, 9%, 2%, 4%, 10%, 6%, 7%, and 4%, respectively; or,

[0032] The liquid crystal composition includes The The The The The The The The The The The The The The The weight percentages are 10%, 10%, 10%, 5%, 9%, 9%, 8%, 5%, 5%, 5%, 5%, 5%, 7%, 7%; or,

[0033] The liquid crystal composition includes The The The The The The The The The The The mass percentages are 35%, 10%, 5%, 6%, 6%, 7%, 8%, 9%, 6%, and 8% respectively; or,

[0034] The liquid crystal composition includes The The The The The The The The The The The The The The weight percentages were 35%, 3%, 5%, 3%, 8%, 9%, 8%, 6%, 4%, 6%, 6%, 3%, and 4%, respectively.

[0035] Accordingly, the present invention also provides a liquid crystal display panel, the liquid crystal display panel comprising a first substrate, a second substrate, and a liquid crystal layer, the first substrate and the second substrate being disposed opposite to each other, the liquid crystal layer being disposed between the first substrate and the second substrate, and the liquid crystal layer comprising the liquid crystal composition described in any embodiment of the present invention.

[0036] The present invention provides a liquid crystal composition and a liquid crystal display panel. The liquid crystal composition has low viscosity and large clearing point, dielectric negativity, optical anisotropy, stretch elastic coefficient and flexural elastic coefficient, which improves the contrast of the liquid crystal display panel and speeds up the response speed of the liquid crystal display panel. Attached Figure Description

[0037] The technical solution and other beneficial effects of this application will become apparent from the following detailed description of specific embodiments in conjunction with the accompanying drawings.

[0038] 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

[0039] The technical solutions in the embodiments and / or examples of the present invention will be clearly and completely described below with reference to specific implementation schemes. Obviously, the embodiments and / or examples described below are only a part of the embodiments and / or examples of the present invention, and not all of them. Based on the embodiments and / or examples of the present invention, all other embodiments and / or examples obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0040] The directional terms used in this invention, such as [up], [down], [left], [right], [front], [back], [inside], [outside], [side], etc., are merely for reference to the accompanying drawings. Therefore, the directional terms used are for illustrating and understanding this invention, and not for limiting it. The terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature.

[0041] This invention provides a liquid crystal composition and a liquid crystal display panel including the liquid crystal composition to improve the contrast and response time of the liquid crystal display panel.

[0042] In one embodiment, the liquid crystal composition provided by the present invention comprises one or more compounds represented by Formula I:

[0043] Wherein, m and n are independently 0, 1, 2 or 3; preferably, m and n are independently 0, 1 or 2; particularly preferably, m and n are independently 0 or 1.

[0044] L1 and L2 are independently H, F, Cl, Br, I, CN, or alkyl groups having 1-15 carbon atoms; preferably, L1 and L2 are independently H and F; particularly preferably, both L1 and L2 are F.

[0045] Z1 and Z2 are independent single bonds, -O-, -S-, -SO2-, -CO-, -C(O)O-, -OC(O)-, -OC(O)O-, -CF2O-, -OCF2-, -CH2CH2-, -CF2CF2-, -CF2CH2-, -CH2CF2-, -CHF-CHF-, -CH2O-, -OCH2-, -CF=CH-, -CH=CF-, -CF=CF-, -CH =CH- or -C≡C-; preferably, Z1 and Z2 are independently single bonds, -O-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O-, -OCH2-, -CH=CH- or -C≡C-; particularly preferably, Z1 and Z2 are independently single bonds, -O-, -CF2O-, -OCF2-, -CH2O-, -OCH2-. One or more H atoms in Z1 and Z2 can be replaced by F, Cl, Br, or I.

[0046] Each And each Independent of each other Preferred each of the above and each of the above Each independently of the other Each of the above is particularly preferred and each of the above Each independently of the other The and stated One or more H atoms in the compound can be replaced by F, Cl, or Br.

[0047] R1 and R2 are independently H, F, Cl, Br, I, CN, SCN, NCS, SF5; preferably, R1 and R2 are independently H or F. Alternatively, R1 and R2 are independently alkyl or alkoxy groups having 1-15 carbon atoms, wherein the alkyl or alkoxy group can be a straight-chain group or a branched-chain group, wherein the straight-chain group is a straight-chain aliphatic hydrocarbon group, and the branched-chain group is a branched aliphatic hydrocarbon group; preferably, R1 and R2 are independently straight-chain groups having 1-7 carbon atoms; particularly preferably, R1 and R2 are independently methyl, methoxy, ethyl, ethoxy, propyl, propoxy, butyl, butoxy, pentyl, pentoxy, hexyl, or hexoxy. Alternatively, R1 and R2 are independently alkenyl, alkenyloxy, alkynyl, or alkynyloxy groups having 2-15 carbon atoms. The alkenyl, alkenyloxy, alkynyl, or alkynyloxy groups can be straight-chain or branched-chain groups, and each alkenyl, alkenyloxy, alkynyl, or alkynyloxy group has at least one carbon-carbon double or triple bond. Preferably, R1 and R2 are independently alkenyl or alkynyl groups having 2-7 carbon atoms. Particularly preferred are vinyl, propenyl, propenyl, butenyl, butenyl, butenyl, butenyl, pent ... The alkenyl group can be either hex-1-enyl, hex-2-enyl, hex-3-enyl, hex-4-enyl, hex-5-enyl, hep-1-enyl, hep-2-enyl, hep-3-enyl, hep-4-enyl, hep-5-enyl, hep-6-enyl, ethynyl, propynyl, propynyl, butynyl, butynyl, butynyl, butynyl, pentynyl, pentynyl, pentynyl, pentynyl, pentynyl, pentynyl, pentynyl, pentynyl, hex-1-enyl, hexynyl, hexynyl, hexynyl, hexynyl, hexynyl, hexynyl, hexynyl, hexynyl, hep-5-enyl, hep-1-enyl, hep-2-enyl, hep-3-enyl, hep-4-enyl, hep-5-enyl, or hep-6-enyl, and the alkenyl group can be E- and Z-isomers. Among the alkenyl and ynyl groups, prop-2-enyl, but-2-enyl, but-3-enyl, pent-2-enyl, pent-3-enyl, pent-4-enyl, prop-2-ynyl, but-2-ynyl, but-3-ynyl, pent-2-ynyl, pent-3-ynyl, or pent-4-ynyl are preferred.

[0048] The terminal groups of R1 and R2 may be monosubstituted by H, CN, or CF3; one or more CH2 groups in R1 and R2 may be substituted by -O-, -S-, -SO2-, -CO-, -C(O)O-, -OC(O)-, -OC(O)O-, -CF2O-, -OCF2-, -CH2CH2-, -CF2CF2-, -CF2CH2-, -CH2CF2-, -CHF-CHF-, -CH2O-, -OCH2-, -CF=CH-, -CH=CF-, -CF=CF-, -CH=CH-, or -C≡C-. To prevent direct bonding of heteroatoms, preferably one or more CH2 groups in R1 can be substituted with -O-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O-, -OCH2-, -CH=CH-, or -C≡C- to prevent direct bonding of heteroatoms. Similarly, one or more CH2 groups in R2 can be substituted with -O-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O-, -OCH2-, -CH=CH-, or -C≡C- to prevent direct bonding of heteroatoms.

[0049] In one embodiment, the compound represented by Formula I is selected from any one or more of the sub-formulas I-1 to I-27; Formulas I-1 to I-27 are specifically:

[0050]

[0051] Wherein, R1 and R2 are independently H, F, or alkyl or alkoxy groups having 1-7 carbon atoms, or alkenyl, alkenyloxy, alkynyl or alkynyloxy groups having 2-7 carbon atoms, and one or both CH2 groups of R1 and R2 are replaced by -O-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2O-, -OCH2- and the heteroatoms are not directly bonded; the alkyl or alkoxy group is preferably a straight-chain compound having 1-7 carbon atoms.

[0052] Preferably, the compound represented by Formula I is selected from one or more of the following sub-formulas IA-1 to IA-27, specifically:

[0053]

[0054] In embodiments of the present invention, the compound represented by Formula I is optically active and has a chiral center. The compound of Formula I can exist in isomer form, such as pure enantiomers, diastereomers, E isomers, Z isomers, or as a mixture of multiple isomers in any desired proportion, for example as a racemic mixture or a mixture of E / Z isomers.

[0055] In one embodiment, the compound represented by Formula I is obtained through the following synthetic route:

[0056]

[0057] In one embodiment, the liquid crystal composition further includes a neutral monomer, said neutral monomer comprising any one or more compounds represented by formulas II1 to II9; formulas II1 to II9 specifically are:

[0058]

[0059] R3 and R4 are independently alkyl or alkoxy groups having 1-10 carbon atoms, or alkenyl, alkenyloxy, alkynyl or alkynyloxy groups having 2-10 carbon atoms; the H atoms in R3 and R4 may be substituted or polysubstituted by F, Cl, Br, I.

[0060] In one embodiment, the liquid crystal composition further includes a polar monomer, said polar monomer comprising any one or more compounds represented by formulas III1 to III5; formulas III1 to III5 specifically are:

[0061]

[0062] R5 and R6 are independently alkyl or alkoxy groups having 1-10 carbon atoms, or alkenyl, alkenyloxy, alkynyl or alkynyloxy groups having 2-10 carbon atoms; the H atoms in R5 and R6 may be substituted or polysubstituted by F, Cl, Br, I.

[0063] In one embodiment, the weight percentages of the compound comprising Formula I, the neutral monomer, and the polar monomer are 1%-95%, 1%-85%, and 1%-80%, respectively. Preferably, the weight percentages of the compound comprising Formula I, the neutral monomer, and the polar monomer are 1%-80%, 5%-60%, and 10%-60%, respectively. More preferably, the weight percentages of the compound comprising Formula I, the neutral monomer, and the polar monomer are 1%-70%, 10%-50%, and 10%-45%, respectively.

[0064] In another embodiment, the weight percentages of the compound, the neutral monomer, and the polar monomer included in Formula I are 1%-70%, 10%-50%, and 10%-45%, respectively. Preferably, the weight percentages of the compound, the neutral monomer, and the polar monomer included in Formula I are 1%-50%, 10%-45%, and 10%-40%, respectively. More preferably, the weight percentages of the compound, the neutral monomer, and the polar monomer included in Formula I are 1%-40%, 15%-45%, and 10%-30%, respectively.

[0065] The liquid crystal composition provided by the present invention will now be explained in detail with reference to specific embodiments.

[0066] Example 1

[0067] Table 1

[0068]

[0069] Please refer to Table 1, which shows the compound ratios of each component of the liquid crystal composition provided in this embodiment, as well as the performance parameters of the liquid crystal composition. The liquid crystal composition includes... The The The The The The The The The The The weight percentages were 30%, 8%, 13%, 5%, 8%, 6%, 10%, 6%, 8%, and 6%, respectively.

[0070] LCD response time Where γ1 is the rotational viscosity of the liquid crystal material, d is the thickness of the liquid crystal cell, Δε is the dielectric anisotropy of the liquid crystal, and V thWhere K is the threshold voltage, K11 is the dihedral elastic coefficient, K22 is the torsional elastic coefficient, and K33 is the flexural elastic coefficient. From the above formulas, it can be seen that the response time of the liquid crystal is positively correlated with the rotational viscosity γ1 and negatively correlated with the dielectric anisotropy Δε, the dihedral elastic coefficient K11, and the flexural elastic coefficient K33. The liquid crystal composition provided in this embodiment has a rotational viscosity γ1 of 96 mPa·s, a dielectric anisotropy Δε of -2.9, a dihedral elastic coefficient K11 of 14.2, and a flexural elastic coefficient K33 of 15.1. The liquid crystal composition provided in this application has a large negative dielectric constant Δε, a small rotational viscosity γ1, a large dihedral elastic coefficient K11, and a large flexural elastic coefficient K33; therefore, it has a fast response time, which helps to improve the response speed of the liquid crystal display panel.

[0071] The contrast ratio of a liquid crystal is related to its dielectric anisotropy; negative dielectric anisotropy helps improve the contrast ratio. The compound represented by Formula I has a large negative polarity. This application, by adding the compound represented by Formula I to the liquid crystal composition, makes the liquid crystal composition have a large negative dielectric constant Δε, which helps improve the contrast ratio of the liquid crystal display panel.

[0072] Furthermore, the liquid crystal composition provided in this embodiment has a high clearing point Tni (87°C), thus exhibiting a wide operating temperature range and a high maximum operating temperature. The liquid crystal composition also possesses a large negative dielectric constant Δε (-2.9) at 25°C, while simultaneously having a low driving voltage.

[0073] In the liquid crystal composition provided in this embodiment, the compound represented by Formula I has high polarity and high dielectric negativity, and its addition helps to shorten the response time of the liquid crystal and improve the contrast of the liquid crystal composition; the compound represented by Formula II has dielectric neutrality and low viscosity, and its addition also helps to shorten the response time of the liquid crystal; the compound represented by Formula III has dielectric negativity and high Tni characteristics, etc.; the compounds represented by Formula I, Formula II and Formula III in the liquid crystal composition can be appropriately adjusted according to actual needs to regulate the various properties of the liquid crystal composition.

[0074] In summary, the liquid crystal composition provided in this embodiment has a large dielectric negative, a small rotational viscosity, a large dihedral elastic coefficient, a large flexural elastic coefficient, a large perpendicular dielectric constant, and a high clearing point, which is beneficial for improving the response speed and contrast of the liquid crystal display panel, while reducing the driving voltage of the liquid crystal display panel, expanding the operating temperature range of the liquid crystal display panel, and increasing the maximum operating temperature of the liquid crystal display panel.

[0075] The method for preparing the liquid crystal composition includes:

[0076] Step B1: Weigh out the predetermined weight of the product at weight percentages of 30%, 8%, 13%, 5%, 8%, 6%, 10%, 6%, 8%, and 6% respectively. The The The The The The The The The

[0077] Step B2: In a melting container, add the above compounds in order of increasing melting point, and heat and stir at a temperature of 60°C-100°C to fully dissolve and mix the liquid crystal composition;

[0078] Step B3: Cool the liquid crystal composition to room temperature.

[0079] Example 2

[0080] Table 2

[0081]

[0082] Please refer to Table 2, which shows the compound ratios of each component of the liquid crystal composition provided in this embodiment, as well as the performance parameters of the liquid crystal composition. The liquid crystal composition includes... The The The The The The The The The The The The weight percentages were 18%, 11%, 5%, 11%, 8%, 6%, 7%, 6%, 7%, 7%, and 14%, respectively.

[0083] Similarly, the liquid crystal composition provided in this embodiment has a large dielectric negative, a small rotational viscosity, a large dihedral elastic coefficient, a large flexural elastic coefficient, a large vertical dielectric constant, and a high clearing point, which is beneficial to improving the response speed and contrast of the liquid crystal display panel, while reducing the driving voltage of the liquid crystal display panel, expanding the operating temperature range of the liquid crystal display panel, and increasing the maximum operating temperature of the liquid crystal display panel.

[0084] Example 3

[0085] Table 3

[0086]

[0087] Please refer to Table 3, which shows the compound ratios of each component of the liquid crystal composition provided in this embodiment, as well as the performance parameters of the liquid crystal composition. The liquid crystal composition includes... The The The The The The The The The The The The weight percentages were 35%, 5%, 10%, 8%, 9%, 2%, 4%, 10%, 6%, 7%, and 4%, respectively.

[0088] Similarly, the liquid crystal composition provided in this embodiment has a large dielectric negative, a small rotational viscosity, a large dihedral elastic coefficient, a large flexural elastic coefficient, a large vertical dielectric constant, and a high clearing point, which is beneficial to improving the response speed and contrast of the liquid crystal display panel, while reducing the driving voltage of the liquid crystal display panel, expanding the operating temperature range of the liquid crystal display panel, and increasing the maximum operating temperature of the liquid crystal display panel.

[0089] Example 4

[0090] Table 4

[0091]

[0092] Please refer to Table 4, which shows the compound ratios of each component of the liquid crystal composition provided in this embodiment, as well as the performance parameters of the liquid crystal composition. The liquid crystal composition includes... The The The The The The The The The The The The The The The weight percentages were 10%, 10%, 10%, 5%, 9%, 9%, 8%, 5%, 5%, 5%, 5%, 5%, 7%, and 7%, respectively.

[0093] Similarly, the liquid crystal composition provided in this embodiment has a large dielectric negative, a small rotational viscosity, a large dihedral elastic coefficient, a large flexural elastic coefficient, a large vertical dielectric constant, and a high clearing point, which is beneficial to improving the response speed and contrast of the liquid crystal display panel, while reducing the driving voltage of the liquid crystal display panel, expanding the operating temperature range of the liquid crystal display panel, and increasing the maximum operating temperature of the liquid crystal display panel.

[0094] Example 5

[0095] Table 5

[0096]

[0097] Please refer to Table 5, which shows the compound ratios of each component of the liquid crystal composition provided in this embodiment, as well as the performance parameters of the liquid crystal composition. The liquid crystal composition includes... The The The The The The The The The The The mass percentages were 35%, 10%, 5%, 6%, 6%, 7%, 8%, 9%, 6%, and 8%, respectively.

[0098] Similarly, the liquid crystal composition provided in this embodiment has a large dielectric negative, a small rotational viscosity, a large dihedral elastic coefficient, a large flexural elastic coefficient, a large vertical dielectric constant, and a high clearing point, which is beneficial to improving the response speed and contrast of the liquid crystal display panel, while reducing the driving voltage of the liquid crystal display panel, expanding the operating temperature range of the liquid crystal display panel, and increasing the maximum operating temperature of the liquid crystal display panel.

[0099] Example 6

[0100] Table 6

[0101]

[0102] Please refer to Table 6, which shows the compound ratios of each component of the liquid crystal composition provided in this embodiment, as well as the performance parameters of the liquid crystal composition. The liquid crystal composition includes... The The The The The The The The The The The The The The weight percentages were 35%, 3%, 5%, 3%, 8%, 9%, 8%, 6%, 4%, 6%, 6%, 3%, and 4%, respectively.

[0103] Similarly, the liquid crystal composition provided in this embodiment has a large dielectric negative, a small rotational viscosity, a large dihedral elastic coefficient, a large flexural elastic coefficient, a large vertical dielectric constant, and a high clearing point, which is beneficial to improving the response speed and contrast of the liquid crystal display panel, while reducing the driving voltage of the liquid crystal display panel, expanding the operating temperature range of the liquid crystal display panel, and increasing the maximum operating temperature of the liquid crystal display panel.

[0104] Please refer to Figure 1 The present invention also provides a liquid crystal display panel, which includes a first substrate 11, a second substrate 12, and a liquid crystal layer 13. The first substrate 11 and the second substrate 12 are disposed opposite to each other, and the liquid crystal layer 13 is disposed between the first substrate 11 and the second substrate 12. The liquid crystal layer 13 includes the liquid crystal composition described in any embodiment of the present invention. Since the liquid crystal display panel includes the liquid crystal composition described in any embodiment of the present invention, it possesses the technical features and beneficial effects of the liquid crystal composition described in any embodiment of the present invention. For details, please refer to the above embodiments, which will not be repeated here. The liquid crystal display panel provided in the embodiments of the present invention can be any one of a vertical alignment (VA) liquid crystal display panel, an electrically controlled birefringence (ECB) liquid crystal display panel, a plasma addressed liquid crystal (PALC) liquid crystal display panel, a fringe field switching (FFS) liquid crystal display panel, and an in-plane switching (IPS) liquid crystal display panel.

[0105] In summary, the embodiments of the present invention provide a liquid crystal composition and a liquid crystal display panel. The liquid crystal composition has low viscosity and large clearing point, dielectric negativity, optical anisotropy, stretch elastic coefficient, and flexural elastic coefficient, thereby improving the contrast of the liquid crystal display panel and accelerating the response speed of the liquid crystal display panel.

[0106] 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 method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A liquid crystal composition, characterized in that, Includes one or more compounds represented by Formula I, or compounds including the following molecular formulas: Where m and n are independently 0, 1, 2 or 3, and m and n cannot be 0 at the same time; Both L1 and L2 are F; Z1 and Z2 are independently single bonds, -O-, -S-, -SO2-, -CO-, -C(O)O-, -OC(O)-, -OC(O)O-, -CF2O-, -OCF2-, -CH2CH2-, -CF2CF2-, -CF2CH2-, -CH2CF2-, -CHF-CHF-, -CH2O-, -OCH2-, -CF=CH-, -CH=CF-, -CF=CF-, -CH=CH-, or -C≡C-; the H in Z1 and Z2 is zero-substituted, mono-substituted, or poly-substituted by F, Cl, Br, or I; Each And each Independent of each other The and stated The H in the H is substituted by F, Cl, or Br, either zero, monosubstituted, or polysubstituted. R1 and R2 are independently H or F, or alkyl or alkoxy groups having 1-15 carbon atoms, or alkenyl, alkenyloxy, alkynyl or alkynoxy groups having 2-15 carbon atoms; the terminal groups of R1 and R2 are substituted or monosubstituted with H, CN or CF3; the CH2 groups in R1 and R2 are substituted or monosubstituted with -O-, -S-, -SO2-, -CO-, -OC(O)O-, -CF2O-, -OCF2-, -CH2CH2-, -CF2CF2-, -CF2CH2-, -CH2CF2-, -CHF-CHF-, -CH2O-, -OCH2-, -CF=CH-, -CH=CF-, -CF=CF-, -CH=CH- or -C≡C-, and the heteroatoms are not directly bonded; The compound with the following molecular formula is: One or more of the following; Wherein, R1 and R2 are independently H, F, or alkyl or alkoxy groups having 1-7 carbon atoms, or alkenyl, alkenyloxy, alkynyl, or alkynyloxy groups having 2-7 carbon atoms, wherein one or both CH2 groups of R1 and R2 are substituted with -O-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2O-, or -OCH2- and the heteroatoms are not directly bonded; wherein the alkyl or alkoxy group is a straight-chain compound having 1-7 carbon atoms; or One or two of them.

2. The liquid crystal composition according to claim 1, characterized in that, The Z1 and Z2 in Formula I are independently single bonds, -O-, -CF2O-, -OCF2-, -CH2O-, and -OCH2-.

3. The liquid crystal composition according to claim 1, characterized in that, The compound represented by Formula I is selected from one or more of the following molecular formulas: Wherein, R1 and R2 are independently H, F, or alkyl or alkoxy groups having 1-7 carbon atoms, or alkenyl, alkenyloxy, alkynyl or alkynyloxy groups having 2-7 carbon atoms, and one or both CH2 groups of R1 and R2 are substituted with -O-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2O-, -OCH2- and the heteroatoms are not directly bonded; the alkyl or alkoxy group is a straight-chain compound having 1-7 carbon atoms.

4. The liquid crystal composition according to claim 1, characterized in that, The compound represented by Formula I is selected from one or more of the following molecular formulas:

5. The liquid crystal composition according to claim 1, characterized in that, The liquid crystal composition further includes a neutral monomer, which comprises any one or more compounds represented by formulas II1 to II9; specifically, formulas II1 to II9 are: R3 and R4 are independently alkyl or alkoxy groups having 1-10 carbon atoms, or alkenyl, alkenyloxy, alkynyl or alkynyloxy groups having 2-10 carbon atoms; the H atoms in R3 and R4 are zero-substituted, mono-substituted or poly-substituted by F, Cl, Br or I.

6. The liquid crystal composition according to claim 1, characterized in that, The liquid crystal composition further includes a polar monomer, which includes any one or more compounds represented by formulas III1 to III5; formulas III1 to III5 are specifically: R5 and R6 are independently alkyl or alkoxy groups having 1-10 carbon atoms, or alkenyl, alkenyloxy, alkynyl or alkynyloxy groups having 2-10 carbon atoms; the H atoms in R5 and R6 are zero-substituted, mono-substituted or poly-substituted by F, Cl, Br or I.

7. The liquid crystal composition according to claim 1, characterized in that, The liquid crystal composition includes The The The The The The The The The The The weight percentages are 30%, 8%, 13%, 5%, 8%, 6%, 10%, 6%, 8%, and 6%, respectively; or The liquid crystal composition includes The The The The The The The The The The The The weight percentages are 18%, 11%, 5%, 11%, 8%, 6%, 7%, 6%, 7%, 7%, and 14% respectively; or, The liquid crystal composition includes The The The The The The The The The The The The weight percentages are 35%, 5%, 10%, 8%, 9%, 2%, 4%, 10%, 6%, 7%, and 4%, respectively; or, The liquid crystal composition includes The The The The The The The The The The The The The The The weight percentages are 10%, 10%, 10%, 5%, 9%, 9%, 8%, 5%, 5%, 5%, 5%, 5%, 7%, 7%; or, The liquid crystal composition includes The The The The The The The The The The The mass percentages are 35%, 10%, 5%, 6%, 6%, 7%, 8%, 9%, 6%, and 8% respectively; or, The liquid crystal composition includes The The The The The The The The The The The The The The weight percentages were 35%, 3%, 5%, 3%, 8%, 9%, 8%, 6%, 4%, 6%, 6%, 3%, and 4%, respectively.

8. A liquid crystal display panel, characterized in that, The device includes a first substrate, a second substrate, and a liquid crystal layer, wherein the first substrate and the second substrate are disposed opposite to each other, and the liquid crystal layer is disposed between the first substrate and the second substrate, and the liquid crystal layer comprises a liquid crystal composition as described in any one of claims 1 to 7.

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