Liquid crystal composition and liquid crystal display panel

Abstract

The invention provides a liquid crystal composition and a liquid crystal display panel. The liquid crystal composition comprises one or more compounds represented by # imgabs0 #, wherein X is-O-or-S-; a1 and A2 are independently a single bond,-O-,-S-, or an alkylene or alkenyloxy group having 1 to 7 carbon atoms, or an alkenylene or alkenyloxy group having 2 to 7 carbon atoms, or an alkynylene or alkynyloxy group having 2 to 7 carbon atoms; w1 and W2 are mutually independent imgabs1, imgabs2, imgabs3 and R1 and R2 are mutually independent H, F, Cl, Br, I, CN, SCN, NCS, SF5, or alkyl with 1-15 carbon atoms, or alkenyl or alkynyl with 2-15 carbon atoms, and the weight percentage of the compound represented by the formula I in the liquid crystal composition is 1%-40%.

Description

Technical Field

[0001] The present application relates to the display field, and in particular to a liquid crystal composition and a liquid crystal display panel. Background Art

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

[0003] In order to meet the requirements of various consumer electronic products, the liquid crystal materials used in display elements and display devices of IPS display mode, FFS display mode, VA display mode, etc. are required to have ① low driving voltage: the liquid crystal material has a large dielectric anisotropy; ② fast response: the liquid crystal material has a small 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 negativity.

[0004] In order to present a better display effect, the contrast, response time and other performance of the existing liquid crystal display panels need to be further improved. Summary of the invention

[0005] The present invention provides a liquid crystal composition and a liquid crystal display panel, so as to improve the performances of the liquid crystal display panel such as contrast and response time.

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

[0007] The present invention provides a liquid crystal composition, which comprises one or more compounds represented by formula I:

[0008]

[0009] Wherein, X is -O- or -S-;

[0010] A1 and A2 are independently a single bond, -O-, -S-, or an alkylene or alkyleneoxy group having 1 to 7 carbon atoms, or an alkenylene or alkenyleneoxy group having 2 to 7 carbon atoms, or an alkynylene or alkynyleneoxy group having 2 to 7 carbon atoms;

[0011] W1 and W2 are independent of each other. H in W1 and W2 may be replaced by F, Cl, Br, or I;

[0012] R1 and R2 are independently H, F, Cl, Br, I, CN, SCN, NCS, SF5, or an alkyl group having 1 to 15 carbon atoms, or an alkenyl or alkynyl group having 2 to 15 carbon atoms; one or more CH2 groups in R1 and R2 may be replaced 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- and the heteroatom is not directly bonded, and one or more H in R1 and R2 may be replaced by F, Cl, Br, or I;

[0013] Wherein, the weight percentage of the compound represented by the formula I in the liquid crystal composition is 1%-40%.

[0014] Optionally, in some embodiments of the present invention, A1 and A2 are independently a single bond or -O-.

[0015] Optionally, in some embodiments of the present invention, W1 and W2 are independently

[0016] Optionally, in some embodiments of the present invention, R1 and R2 are independently H, F, Cl, Br, or an alkyl group having 1 to 7 carbon atoms, or an alkenyl or alkynyl group having 2 to 7 carbon atoms.

[0017] Optionally, in some embodiments of the present invention, the compound represented by Formula I is selected from any one or more of the following subformulae Ⅰ-1 to Ⅰ-12; Formulae Ⅰ-1 to Ⅰ-12 are specifically:

[0018]

[0019] Wherein, R1 and R2 are independently an alkyl group having 1 to 15 carbon atoms, or an alkenyl or alkynyl group having 2 to 15 carbon atoms, and one or two CH2 groups in R1 and R2 are replaced by -O-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2O-, -OCH2-, and the heteroatom is not directly bonded.

[0020] Optionally, in some embodiments of the present invention, the compound represented by Formula I is selected from one or more of the following subformulae Ⅰ-2-1 to Ⅰ-12-12, wherein Formulae Ⅰ-2-1 to Ⅰ-12-12 are specifically:

[0021]

[0022]

[0023] Optionally, in some embodiments of the present invention, the liquid crystal composition further comprises a neutral monomer, the weight percentage of the neutral monomer in the liquid crystal composition is 5%-70%, and the neutral monomer comprises any one or more of the compounds represented by formulae II1 to II9; formulae II1 to II9 are specifically:

[0024]

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

[0026] Optionally, in some embodiments of the present invention, the liquid crystal composition further comprises a polar monomer, the weight percentage of the polar monomer in the liquid crystal composition is 5%-70%, and the polar monomer comprises any one or more of the compounds represented by formulae III1 to III5; formulae III1 to III5 are specifically:

[0027]

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

[0029] Optionally, in some embodiments of the present invention, the liquid crystal composition comprises

[0030]

[0031] Said Said Said Said Said Said Said Said Said Said Said The weight percentages are 18%, 11%, 5%, 12%, 8%, 6%, 7%, 6%, 7%, 7%, 13% respectively; or

[0032] The liquid crystal composition comprises

[0033] Said Said Said Said Said Said Said Said Said Said Said The weight percentages are 35%, 5%, 10%, 8%, 8%, 4%, 4%, 10%, 6%, 8%, 2% respectively; or,

[0034] The liquid crystal composition comprises

[0035]

[0036]

[0037] Said Said Said Said Said Said Said Said Said Said Said Said Said Said The weight percentages are 10%, 10%, 10%, 5%, 9%, 9%, 8%, 5%, 5%, 5%, 5%, 5%, 8%, 6% respectively; or,

[0038] The liquid crystal composition comprises

[0039] Said Said Said Said Said Said Said Said Said Said The mass percentages are 35%, 10%, 5%, 6%, 6%, 8%, 8%, 10%, 6%, 6% respectively; or,

[0040] The liquid crystal composition comprises

[0041] Said Said Said Said Said Said Said Said Said Said Said Said Said The weight percentages are 35%, 3%, 5%, 3%, 8%, 9%, 8%, 6%, 4%, 6%, 5%, 5%, 3% respectively; or,

[0042] The liquid crystal composition comprises

[0043]

[0044] Said Said Said Said Said Said Said Said Said Said The mass percentages are 30%, 8%, 13%, 5%, 8%, 6%, 10%, 6%, 10% and 4% respectively.

[0045] Correspondingly, the present invention also provides a liquid crystal display panel, which includes a first substrate, a second substrate, and a liquid crystal layer, the first substrate and the second substrate are arranged opposite to each other, the liquid crystal layer is arranged between the first substrate and the second substrate, and the liquid crystal layer includes the liquid crystal composition described in any embodiment of the present invention.

[0046] The present invention provides a liquid crystal composition and a liquid crystal display panel, wherein the liquid crystal composition comprises One or more compounds represented by The compound includes a fluorinated oxirane group or a fluorinated dithiophene group. The fluorinated oxirane group and the fluorinated dithiophene group have a larger dielectric negativity, a larger polarity and a lower viscosity, so that the liquid crystal composition has a faster response time. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The technical solution and other beneficial effects of the present application will be made apparent by describing in detail the specific implementation methods of the present application in conjunction with the accompanying drawings.

[0048] Figure 1 A schematic diagram of the structure of a liquid crystal display panel provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0049] The following will be combined with the specific embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments and / or examples of the present invention. Obviously, the embodiments and / or examples described below are only part of the embodiments and / or examples of the present invention, rather than all the embodiments and / or examples. Based on the embodiments and / or examples in the present invention, all other embodiments and / or examples obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] The directional terms mentioned in the present invention, such as [upper], [lower], [left], [right], [front], [back], [inner], [outer], [side], etc., are only referenced to the directions of the attached drawings. Therefore, the directional terms used are used to illustrate and understand the present invention, rather than to limit the present invention. The terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features.

[0051] Embodiments of the present invention provide a liquid crystal composition and a liquid crystal display panel including the liquid crystal composition, so as to improve the performance of the liquid crystal display panel, such as contrast and response time.

[0052] In one embodiment, the liquid crystal composition provided by the present invention comprises one or more compounds represented by Formula I:

[0053] Wherein, X is -O- or -S-.

[0054] A1 and A2 are independently a single bond, -O-, -S-, or an alkylene or alkyleneoxy group having 1-7 carbon atoms, or an alkenylene or alkenyleneoxy group having 2-7 carbon atoms, or an alkynylene or alkynyleneoxy group having 2-7 carbon atoms; preferably, A1 and A2 are independently a single bond or -O-; particularly preferably, A1 and A2 are both -O-.

[0055] W1 and W2 are independent of each other.

[0056] Preferably, W1 and W2 are independently Preferably, W1 and W2 are independently In the W1 and W2, H may be substituted by F, Cl, Br, or I, or may be substituted by one or more of them.

[0057] R1 and R2 are independently H, F, Cl, Br, I, CN, SCN, NCS, SF5, or an alkyl group having 1 to 15 carbon atoms, or an alkenyl or alkynyl group having 2 to 15 carbon atoms; preferably, R1 and R2 are independently H, F, Cl, Br, or an alkyl group having 1 to 7 carbon atoms, or an alkenyl or alkynyl group having 2 to 7 carbon atoms. One or more CH2 groups in R1 and R2 can be replaced 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- so that the heteroatom is not directly bonded, and one or more H in R1 and R2 can be replaced by F, Cl, Br, or I.

[0058] In the case where A1 is a single bond or -O-, R1 and R2 are preferably alkyl groups having 1 to 7 carbon atoms, and particularly preferably alkyl groups having 2 to 5 carbon atoms. In the case where A2 is a single bond or -O-, R2 is preferably alkyl, alkenyl or alkynyl, and particularly preferably alkyl groups having 1 to 7 carbon atoms. The sum of the number of carbon atoms in R1 and R2 is preferably 4, 5, 6, 7, 8, 9 or 10, and particularly preferably 5, 6, 7, 8 or 9.

[0059] When the R1 and R2 are independently preferably alkyl, the alkyl may be a straight chain structure or a branched chain structure, preferably a straight chain structure; the straight chain structure is a straight chain aliphatic hydrocarbon group, and the branched chain structure is a branched chain aliphatic hydrocarbon group. The R1 and R2 are independently preferably methyl, ethyl, propyl, butyl, pentyl, hexyl or heptyl.

[0060] When the R1 and R2 are independently alkenyl or alkynyl, the alkenyl or alkynyl may be a straight-chain structure or a branched structure, and the alkenyl or alkynyl has at least one carbon-carbon double bond or carbon-carbon triple bond; the straight-chain structure is a straight-chain aliphatic hydrocarbon group, and the branched structure is a branched aliphatic hydrocarbon group. Preferably, the R1 and R2 are straight-chain alkenyl or alkynyl groups having 2 to 7 carbon atoms; particularly preferably, the R1 and R2 are independently vinyl, prop-1-enyl, prop-2-enyl, but-1-enyl, but-2-enyl, but-3-enyl, pent-1-enyl, pent-2-enyl, pent-3-enyl, pent-4-enyl, hex-1-enyl, hex-2-enyl, hex-3-enyl, hex-4-enyl, hex-5-enyl, hept-1-enyl, hept-2-enyl, hept-3-enyl, hept-4-enyl, The invention also includes but is not limited to the following: -enyl, hept-5-enyl, hept-6-enyl, ethynyl, prop-1-ynyl, prop-2-ynyl, but-1-ynyl, but-2-ynyl, but-3-ynyl, pent-1-ynyl, pent-2-ynyl, pent-3-ynyl, pent-4-ynyl, hex-1-ynyl, hex-2-ynyl, hex-3-ynyl, hex-4-ynyl, hex-5-ynyl, hept-1-ynyl, hept-2-ynyl, hept-3-ynyl, hept-4-ynyl, hept-5-ynyl, hept-6-ynyl, and the alkenyl group may be an E and Z isomer. Among the alkenyl and alkynyl groups, preferred are 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.

[0061] In one embodiment, the compound represented by formula I is selected from any one or more of the subformulas of I-1 to I-12; formulas I-1 to I-12 are specifically:

[0062]

[0063] Wherein, R1 and R2 are independently an alkyl group having 1 to 15 carbon atoms, or an alkenyl or alkynyl group having 2 to 15 carbon atoms, and one or two CH2 groups in R1 and R2 are substituted by -O-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2O-, -OCH2-, and the heteroatom is not directly bonded; the alkyl group is preferably a straight-chain compound having 1 to 7 carbon atoms.

[0064] Preferably, the compound represented by formula I is selected from one or more of the following subformulae Ⅰ-2-1 to Ⅰ-12-12, wherein formulae Ⅰ-2-1 to Ⅰ-12-12 are specifically:

[0065]

[0066]

[0067]

[0068] In an embodiment of the present invention, the compound represented by the formula I is optically active and has a chiral center. The compound of the formula I can exist in the form of isomers, such as pure enantiomers, diastereomers, E isomers, Z isomers or as a mixture of multiple isomers in any desired ratio, for example, as a racemate, E / Z isomer mixture.

[0069] In one embodiment, when the compound represented by formula I comprises When It is synthesized by the following synthetic route:

[0070]

[0071] In one embodiment, when the compound represented by formula I comprises When It is synthesized by the following synthetic route:

[0072]

[0073]

[0074] Other compounds represented by the formula I can be synthesized by referring to the above two embodiments and conventional methods in the art, which will not be described in detail here.

[0075] In one embodiment, the liquid crystal composition further comprises a neutral monomer, and the neutral monomer comprises any one or more of the compounds represented by formulae II1 to II9; formulae II1 to II9 are specifically:

[0076]

[0077] Wherein, R3 and R4 are independently an alkyl or alkoxy group having 1 to 10 carbon atoms, or an alkenyl, alkenyloxy, alkynyl or alkynyloxy group having 2 to 10 carbon atoms; the H atoms in R3 and R4 may be mono- or poly-substituted by F, Cl, Br or I.

[0078] In one embodiment, the liquid crystal composition further includes a polar monomer, and the polar monomer includes any one or more of the compounds represented by formulae III1 to III5; formulae III1 to III5 are specifically:

[0079]

[0080] Wherein, R5 and R6 are independently an alkyl or alkoxy group having 1 to 10 carbon atoms, or an alkenyl, alkenyloxy, alkynyl or alkynyloxy group having 2 to 10 carbon atoms; the H atoms in R5 and R6 may be mono- or poly-substituted by F, Cl, Br or I.

[0081] In one embodiment, the weight percentages of the compound included in the formula I, the neutral monomer and the polar monomer are 1%-50%, 1%-90% and 1%-90% respectively. Preferably, the weight percentages of the compound included in the formula I, the neutral monomer and the polar monomer are 1%-40%, 5%-70% and 5%-70% respectively. More preferably, the weight percentages of the compound included in the formula I, the neutral monomer and the polar monomer are 1%-25%, 10%-50% and 10%-50% respectively.

[0082] The liquid crystal composition provided by the present invention is explained in detail below with reference to specific embodiments.

[0083] Embodiment 1

[0084] Table 1

[0085]

[0086] Please refer to Table 1, which shows the ratio of the compounds of the various components 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

[0087] Said Said Said Said Said Said Said Said Said Said Said The weight percentages are 18%, 11%, 5%, 12%, 8%, 6%, 7%, 6%, 7%, 7%, and 13% respectively.

[0088] 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 th is the threshold voltage, K11 is the oblique elastic coefficient, K22 is the torsional elastic coefficient, and K33 is the bending elastic coefficient. It can be seen from the above formula 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 oblique elastic coefficient K11, and the bending elastic coefficient K33. The rotational viscosity γ1 of the liquid crystal composition provided in this embodiment is 93mPa·s, the dielectric anisotropy Δε is -3.6, the oblique elastic coefficient K11 is 14.5, and the bending elastic coefficient K33 is 15.2. The liquid crystal composition provided in the present application has a larger negative dielectric constant Δε, a smaller rotational viscosity γ1, a larger oblique elastic coefficient K11 and a larger bending elastic coefficient K33, and therefore has a faster response time, which helps to improve the response speed of the liquid crystal display panel.

[0089] The contrast of liquid crystal is related to the dielectric anisotropy of liquid crystal, and negative dielectric anisotropy helps to improve the contrast of liquid crystal. The compound represented by formula I has a large negative polarity. In the present application, by adding the compound represented by formula I to the liquid crystal composition, the liquid crystal composition has a large negative dielectric constant Δε, which helps to improve the contrast of the liquid crystal display panel.

[0090] In addition, the liquid crystal composition provided in this embodiment has a higher clearing point Tni (97°C), thus having a wider operating temperature range and a higher maximum operating temperature. The liquid crystal composition has a larger negative dielectric constant Δε (-3.6) at a temperature of 25°C and a lower driving voltage.

[0091] In the liquid crystal composition provided in this embodiment, the compound represented by Formula I has a large dielectric negativity and a low rotational viscosity, 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 the characteristics of 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 adjust the various properties of the liquid crystal composition.

[0092] In summary, the liquid crystal composition provided in this embodiment has a larger dielectric negativity, a smaller rotational viscosity, a larger oblique elastic coefficient, a larger bending elastic coefficient, a larger vertical dielectric constant and a higher 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.

[0093] The preparation method of the liquid crystal composition comprises:

[0094] Step B1, weigh the predetermined weight of the said Said Said Said Said Said Said Said Said Said Said

[0095] Step B2, in a melting container, add the above compounds in order from low to high melting points, and heat and stir at 60°C-100°C to fully dissolve and mix the liquid crystal composition;

[0096] Step B3, cooling the liquid crystal composition to room temperature.

[0097] Embodiment 2

[0098] Table 2

[0099]

[0100] Please refer to Table 2, which shows the ratio of the compounds of the various components 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

[0101] Said Said Said Said Said Said Said Said Said Said Said The weight percentages are 35%, 5%, 10%, 8%, 8%, 4%, 4%, 10%, 6%, 8% and 2% respectively.

[0102] Similarly, the liquid crystal composition provided in this embodiment has a larger dielectric negativity, a smaller rotational viscosity, a larger oblique elastic coefficient, a larger bending elastic coefficient, a larger vertical dielectric constant and a higher 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.

[0103] Embodiment 3

[0104] Table 3

[0105]

[0106] Please refer to Table 3, which shows the ratio of the compounds of the various components 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

[0107] Said Said Said Said Said Said Said Said Said Said Said Said Said Said The weight percentages are 10%, 10%, 10%, 5%, 9%, 9%, 8%, 5%, 5%, 5%, 5%, 5%, 8%, and 6% respectively.

[0108] Similarly, the liquid crystal composition provided in this embodiment has a larger dielectric negativity, a smaller rotational viscosity, a larger oblique elastic coefficient, a larger bending elastic coefficient, a larger vertical dielectric constant and a higher 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.

[0109] Embodiment 4

[0110] Table 4

[0111]

[0112] Please refer to Table 4, which shows the ratio of the compounds of the various components 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

[0113] Said Said Said Said Said Said Said Said Said Said The mass percentages are 35%, 10%, 5%, 6%, 6%, 8%, 8%, 10%, 6%, and 6% respectively.

[0114] Similarly, the liquid crystal composition provided in this embodiment has a larger dielectric negativity, a smaller rotational viscosity, a larger oblique elastic coefficient, a larger bending elastic coefficient, a larger vertical dielectric constant and a higher 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.

[0115] Embodiment 5

[0116] Table 5

[0117]

[0118] Please refer to Table 5, which shows the ratio of the compounds of the various components 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

[0119] Said Said Said Said Said Said Said Said Said Said Said Said Said The weight percentages are 35%, 3%, 5%, 3%, 8%, 9%, 8%, 6%, 4%, 6%, 5%, 5%, and 3% respectively.

[0120] Similarly, the liquid crystal composition provided in this embodiment has a larger dielectric negativity, a smaller rotational viscosity, a larger oblique elastic coefficient, a larger bending elastic coefficient, a larger vertical dielectric constant and a higher 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.

[0121] Embodiment 6

[0122] Table 6

[0123]

[0124] Please refer to Table 6, which shows the ratio of the compounds of the various components 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

[0125] Said Said Said Said Said Said Said Said Said Said The mass percentages are 30%, 8%, 13%, 5%, 8%, 6%, 10%, 6%, 10% and 4% respectively.

[0126] Similarly, the liquid crystal composition provided in this embodiment has a larger dielectric negativity, a smaller rotational viscosity, a larger oblique elastic coefficient, a larger bending elastic coefficient, a larger vertical dielectric constant and a higher 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.

[0127] Please refer to Figure 1The present invention also provides a liquid crystal display panel accordingly, the liquid crystal display panel 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 arranged opposite to each other, the liquid crystal layer 13 is arranged between the first substrate 11 and the second substrate 12, and 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 has the technical features and beneficial effects of the liquid crystal composition described in any embodiment of the present invention. Please refer to the above embodiments for details, which will not be repeated here. The liquid crystal display panel provided in the embodiment 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 display panel (PALC), a fringe field switching (FFS) liquid crystal display panel, an in-plane switching (IPS) liquid crystal display panel, etc.

[0128] In summary, the embodiments of the present invention provide a liquid crystal composition and a liquid crystal display panel, wherein the liquid crystal composition comprises One or more compounds represented by The compound includes a fluorinated oxirane group or a fluorinated dithiophene group. The fluorinated oxirane group and the fluorinated dithiophene group have a larger dielectric negativity, a larger polarity and a lower viscosity, so that the liquid crystal composition has a faster response time.

[0129] The liquid crystal composition and liquid crystal display panel provided in the embodiments of the present invention are introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A liquid crystal composition, characterized in that: Includes one or more compounds represented by formula I: Wherein, X is -O- or -S-; A1 and A2 are independently a single bond, -O-, -S-, or an alkylene or alkyleneoxy group having 1 to 7 carbon atoms, or an alkenylene or alkenyleneoxy group having 2 to 7 carbon atoms, or an alkynylene or alkynyleneoxy group having 2 to 7 carbon atoms; W1 and W2 are independent of each other. H in W1 and W2 may be replaced by F, Cl, Br, or I; R1 and R2 are independently H, F, Cl, Br, I, CN, SCN, NCS, SF5, or an alkyl group having 1 to 15 carbon atoms, or an alkenyl or alkynyl group having 2 to 15 carbon atoms; one or more CH2 groups in R1 and R2 may be replaced 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- and the heteroatom is not directly bonded, and one or more H in R1 and R2 may be replaced by F, Cl, Br, or I; Wherein, the weight percentage of the compound represented by the formula I in the liquid crystal composition is 1%-40%.

2. The liquid crystal composition according to claim 1, wherein The A1 and A2 are independently a single bond or -O-.

3. The liquid crystal composition according to claim 1, wherein The W1 and W2 are independent of each other.

4. The liquid crystal composition according to claim 1, wherein The R1 and R2 are independently H, F, Cl, Br, or an alkyl group having 1 to 7 carbon atoms, or an alkenyl or alkynyl group having 2 to 7 carbon atoms.

5. The liquid crystal composition according to claim 1, wherein The compound represented by the formula I is selected from any one or more of the following subformulas Ⅰ-1 to Ⅰ-12; formulas Ⅰ-1 to Ⅰ-12 are specifically: Wherein, R1 and R2 are independently an alkyl group having 1 to 15 carbon atoms, or an alkenyl or alkynyl group having 2 to 15 carbon atoms, and one or two CH2 groups in R1 and R2 are replaced by -O-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2O-, -OCH2-, and the heteroatom is not directly bonded.

6. The liquid crystal composition according to claim 5, characterized in that The compound represented by the formula I is selected from one or more of the following subformulas Ⅰ-2-1 to Ⅰ-12-12, wherein the formulas Ⅰ-2-1 to Ⅰ-12-12 are specifically:

7. The liquid crystal composition according to claim 1, wherein The liquid crystal composition further includes a neutral monomer, the weight percentage of the neutral monomer in the liquid crystal composition is 5%-70%, and the neutral monomer includes any one or more of the compounds represented by formulae II1 to II9; formulae II1 to II9 are specifically: Wherein, R3 and R4 are independently an alkyl or alkoxy group having 1 to 10 carbon atoms, or an alkenyl, alkenyloxy, alkynyl or alkynyloxy group having 2 to 10 carbon atoms; the H atoms in R3 and R4 may be mono- or poly-substituted by F, Cl, Br or I.

8. The liquid crystal composition according to claim 1, wherein The liquid crystal composition further comprises a polar monomer, the weight percentage of the polar monomer in the liquid crystal composition is 5%-70%, and the polar monomer comprises any one or more of the compounds represented by formulae III1 to III5; formulae III1 to III5 are specifically: Wherein, R5 and R6 are independently an alkyl or alkoxy group having 1 to 10 carbon atoms, or an alkenyl, alkenyloxy, alkynyl or alkynyloxy group having 2 to 10 carbon atoms; the H atoms in R5 and R6 may be mono- or poly-substituted by F, Cl, Br or I.

9. The liquid crystal composition according to claim 1, wherein The liquid crystal composition comprises Said Said Said Said Said Said Said Said Said Said Said The weight percentages are 18%, 11%, 5%, 12%, 8%, 6%, 7%, 6%, 7%, 7%, 13% respectively; or The liquid crystal composition comprises Said Said Said Said Said Said Said Said Said Said Said The weight percentages are 35%, 5%, 10%, 8%, 8%, 4%, 4%, 10%, 6%, 8%, 2% respectively; or, The liquid crystal composition comprises Said Said Said Said Said Said Said Said Said Said Said Said Said Said The weight percentages are 10%, 10%, 10%, 5%, 9%, 9%, 8%, 5%, 5%, 5%, 5%, 5%, 8%, 6% respectively; or, The liquid crystal composition comprises Said Said Said Said Said Said Said Said Said Said The mass percentages are 35%, 10%, 5%, 6%, 6%, 8%, 8%, 10%, 6%, 6% respectively; or, The liquid crystal composition comprises Said Said Said Said Said Said Said Said Said Said Said Said Said The weight percentages are 35%, 3%, 5%, 3%, 8%, 9%, 8%, 6%, 4%, 6%, 5%, 5%, 3% respectively; or, The liquid crystal composition comprises Said Said Said Said Said Said Said Said Said Said The mass percentages are 30%, 8%, 13%, 5%, 8%, 6%, 10%, 6%, 10% and 4% respectively.

10. A liquid crystal display panel, characterized in that: The invention comprises a first substrate, a second substrate, and a liquid crystal layer, wherein the first substrate and the second substrate are arranged opposite to each other, the liquid crystal layer is arranged between the first substrate and the second substrate, and the liquid crystal layer comprises the liquid crystal composition according to any one of claims 1 to 9.

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