Liquid crystal compositions, liquid crystal display devices and their applications

Abstract

This invention provides a liquid crystal composition, a liquid crystal display device comprising the same, and their applications. The liquid crystal composition of this invention comprises at least one compound of general formula I, at least one compound of general formula II, at least one compound of general formula F, at least one compound of general formula M, and at least one compound of general formula N. In the liquid crystal composition of this invention, through the specific structure and content of the compounds, it maintains appropriate dielectric anisotropy, good optical anisotropy, and good clearing point, while possessing a large elastic constant and high transmittance; thus, the liquid crystal display device comprising the same has a fast response speed and a high contrast ratio; the liquid crystal composition of this invention is suitable for application in fast-response display modes such as VA, PSVA, IPS, and NFFS.

Description

Technical Field

[0001] This invention belongs to the field of liquid crystal material technology, specifically relating to a liquid crystal composition, a liquid crystal display device and its application, particularly to a liquid crystal composition comprising a liquid crystal compound with terminal methyl alkenyl groups, a liquid crystal display device and its application. Background Technology

[0002] Liquid crystal displays (LCDs) have experienced rapid development due to their small size, light weight, low power consumption, and excellent display quality, especially in portable electronic information products. With the increasing size of LCD screens used in portable computers, office applications, and video applications, LCDs have been able to be used for large-screen displays and have ultimately replaced cathode ray tube (CRT) displays.

[0003] Liquid crystal materials are mixtures of small organic rod-shaped molecule compounds that exhibit both the fluidity of liquids and the anisotropy of crystals at certain temperatures. Liquid crystal display devices utilize the optical and dielectric anisotropy inherent in the liquid crystal materials themselves to function.

[0004] Compared to traditional display devices and materials, liquid crystal display (LCD) materials have significant advantages: low driving voltage, minimal power consumption, high reliability, large display information capacity, color display, flicker-free operation, no harm to the human body, automated production process, low cost, ability to be manufactured into various specifications and types of LCD displays, and portability. Due to these advantages, LCD technology has profoundly impacted the field of display imaging, promoting the development of microelectronics and optoelectronic information technology. Liquid crystal materials, with their excellent optical properties and photoelectric effects, have found widespread application in numerous display scenarios.

[0005] Liquid crystal compounds with olefin-terminated structures at both ends are a relatively novel class of liquid crystal monomer materials in recent years. They have the advantage of fast response speed and have been used in some typical applications of negative liquid crystal materials. However, compounds with olefin-terminated structures also have some disadvantages in application, namely, the amount used is limited. Excessive proportion can lead to a decrease in miscibility and affect the stability of low-temperature storage. They also have the problem of low elastic constant, especially low bending elastic constant, which affects the contrast ratio.

[0006] Dibenzofuran compounds are also a relatively new class of liquid crystal monomer materials in recent years. Due to their characteristic benzofuran or benzothiophene structures, dibenzofuran compounds have advantages such as large elastic constant, large dielectric anisotropy, and very stable structure, which can improve the response speed of liquid crystal compositions and the contrast of display devices. However, they are slightly insufficient in liquid crystal display devices that require faster response time and higher contrast.

[0007] To improve the response speed of liquid crystal display devices, it is necessary to minimize the rotational viscosity of the liquid crystal material. However, generally, low-viscosity liquid crystal materials have lower clearing points and optical anisotropy. Therefore, when formulating liquid crystal compositions, other performance requirements must be considered while reducing viscosity.

[0008] The formulation of liquid crystal compositions involves simultaneously adjusting many performance parameters of the liquid crystal composition. Adjusting one performance parameter of a liquid crystal composition without affecting the value of another is virtually impossible. Sometimes, adding a certain monomeric liquid crystal to adjust a certain performance parameter of the liquid crystal composition may be beneficial to one or more other properties, but may also be detrimental to the improvement of other properties. Therefore, how to obtain liquid crystal compositions that can completely or partially solve the above problems remains a pressing issue in the field. Summary of the Invention

[0009] To address the shortcomings of existing technologies, the present invention aims to provide a liquid crystal composition, a liquid crystal display device comprising the same, and their applications. Compared to existing technologies, the liquid crystal composition provided by the present invention maintains appropriate dielectric anisotropy, good optical anisotropy, and good clearing point, while also taking into account the performance advantages of compounds containing terminal methyl alkenyl structures. Furthermore, it possesses a large elastic constant, high transmittance, and low rotational viscosity, resulting in liquid crystal display devices comprising the same having faster response times, higher contrast ratios, and higher transmittance. This contributes to improving the display effect of liquid crystal materials and is suitable for fast-response display modes such as VA, PSVA, IPS, and NFFS.

[0010] Technical solution

[0011] To achieve this objective, the present invention adopts the following technical solution:

[0012] In a first aspect, the present invention provides a liquid crystal composition comprising:

[0013] At least one compound of general formula I:

[0014]

[0015] At least one compound of general formula II:

[0016]

[0017] At least one compound of general formula F:

[0018]

[0019] At least one compound of general formula M:

[0020] as well as

[0021] At least one compound of the general formula N:

[0022]

[0023] Wherein, R1 represents a straight-chain alkyl group containing 1-12 (e.g., 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, or 12) carbon atoms, or a branched alkyl group containing 3-12 (e.g., 3, 4, 5, 6, 7, 8, 9, 10, 11, or 12) carbon atoms. One or more non-adjacent -CH2- groups of the straight-chain alkyl group containing 1-12 carbon atoms and the branched alkyl group containing 3-12 carbon atoms may be independently replaced by -CH=CH-, -C≡C-, -O-, -CO-, -CO-O-, or -O-CO-.

[0024] R2 represents a straight-chain alkyl group containing 1-12 (e.g., 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 or 12) carbon atoms;

[0025] R3 represents a straight-chain or branched alkyl group containing 1-12 (e.g., 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 or 12) carbon atoms, wherein one or more non-adjacent -CH2- groups of the straight-chain or branched alkyl group containing 1-12 carbon atoms may be independently replaced by -CH=CH-, -C≡C-, -O-, -CO-, -CO-O- or -O-CO-;

[0026] R F1 and R F2 Each can independently represent -H, halogen, or straight-chain or branched alkyl groups containing 1-12 carbon atoms. The alkyl group containing 1-12 carbon atoms, whether straight-chain or branched, One or more non-adjacent -CH2- can be independently replaced by -CH=CH-, -C≡C-, -O-, -S-, -CO-, -CO-O- or -O-CO-, and one or more -H in the straight-chain or branched alkyl group containing 1-12 carbon atoms can be independently replaced by -F or -Cl.

[0027] R M1 R M2 R N1 and R N2 Each can be independently represented as a straight-chain alkyl group containing 1-12 carbon atoms, or a branched alkyl group containing 3-12 carbon atoms. Wherein, one or more non-adjacent -CH2- of the straight-chain alkyl containing 1-12 carbon atoms and the branched alkyl containing 3-12 carbon atoms can be independently replaced by -CH=CH-, -C≡C-, -O-, -CO-, -CO-O-, or -O-CO-.

[0028] ring and ring Each represents independently in One or more non-adjacent -CH2- bonds in one or more rings can be replaced by -O- bonds, and at most two non-adjacent single bonds in one ring can be replaced by double bonds. One or more -H can be independently replaced by -CN, -F or -Cl, and -CH= in one or more rings can be replaced by -N=;

[0029] ring and ring Each represents independently

[0030] ring and ring Each represents independently The above One or more -H can be replaced by -F, -Cl, or -CN, and one or more -CH= in a ring can be replaced by -N=. One or more of the -CH2- can be replaced by -O-;

[0031] X F Indicates -O-, -S-, or -CO-;

[0032] L F1 and L F2 Each can be independently represented as -H, -F, -Cl, -CF3, or -OCF3;

[0033] Z F1 and Z F2 Each can independently represent a single bond, -O-, -CO-O-, -O-CO-, -CH2O-, -OCH2-, -(CH2)2O-, -O(CH2)2-, -CH=CH-, -C≡C-, -CH2CH2-, -CF2CF2-, -(CH2)3-, -(CH2)4-, -CF2O-, or -OCF2-;

[0034] n F1 and n F2Each can be independently represented as 0, 1, or 2, where when n F1 When 2 is represented, the ring Same or different, where when n F2 When 2 is represented, the ring Same or different, Z F2 Same or different;

[0035] n F4 Represents integers from 0 to 4;

[0036] Z B1 and Z B2 Each can independently represent a single bond, -CO-O-, -O-CO-, -O-CO-O-, -CH2O-, -OCH2-, -CH=CH-, -C≡C-, -CH2CH2-, -CF2CF2-, -CF=CF-, -(CH2)4-, -CF2O-, or -OCF2-;

[0037] n B1 Indicates 1, 2, or 3, n B2 Represents 0 or 1, where when n B1 When representing 2 or 3, the ring Same or different, Z B1 Same or different;

[0038] L B1 and L B2 Each can be independently represented as -H, halogen, alkyl group containing 1-3 carbon atoms, or alkoxy group containing 1-3 carbon atoms;

[0039] ring ring and ring Each represents independently in One or more -CH2- bonds can be replaced by -O- bonds, and single bonds in one or at most two rings can be replaced by double bonds. At most one -H in the halogen can be replaced by a halogen;

[0040] Z M1 and Z M2 Each can independently represent a single bond, -CH2CH2-, -C≡C-, -CH=CH-, -(CH2)3-, -(CH2)4-, -CO-O-, -O-CO-, -CH2O-, -OCH2-, -CF2CF2-, -CF2O-, or -OCF2-;

[0041] n M Represents 0, 1, or 2, where when n M When n represents 0, the compounds of general formula M do not include compounds of general formula I; when n represents 0, the compounds of general formula M do not include compounds of general formula I.M When 2 is represented, the ring Same or different, Z M2 Same or different;

[0042] ring and ring Each represents independently The above One or more of the -CH2- can be replaced by -O-, wherein One or more -H can be replaced by -F, -Cl, or -CN, and one or more -CH= in a ring can be replaced by -N=;

[0043] Preferably, Z B1 and Z B2 Each can independently represent a single bond, -CO-O-, -O-CO-, -CH2O-, -OCH2-, -CH=CH-, -C≡C-, -CH2CH2-, -CF2CF2-, -(CH2)4-, -CF2O-, or -OCF2-;

[0044] Preferably, n B1 n represents 0, 1, 2, or 3. B2 Represents 0 or 1, and 0 ≤ n B1 +n B2 ≤3; when n B1 When representing 2 or 3, the ring Same or different, Z B1 Same or different; and

[0045] Compounds of formula M do not include compounds of formula I; compounds of formula N do not include compounds of formula II.

[0046] In some embodiments of the present invention, R N1 and R N2 Each independently represents a straight-chain alkyl group containing 1 to 8 (e.g., 1, 2, 3, 4, 5, 6, 7 or 8) carbon atoms.

[0047] In some embodiments of the present invention, R N1 and R N2 Each independently represents a branched alkyl group containing 3-8 (e.g., 3, 4, 5, 6, 7 or 8) carbon atoms.

[0048] In some embodiments of the present invention, R N1 and R N2 Each independently represents a straight-chain alkoxy group containing 1 to 8 (e.g., 1, 2, 3, 4, 5, 6, 7, or 8) carbon atoms.

[0049] In some embodiments of the present invention, RN1 and R N2 Each independently represents a branched alkoxy group containing 3-8 (e.g., 3, 4, 5, 6, 7 or 8) carbon atoms.

[0050] In some embodiments of the present invention, R N1 and R N2 Each can independently represent a straight-chain alkenyl group containing 2-8 (e.g., 2, 3, 4, 5, 6, 7 or 8) carbon atoms.

[0051] In some embodiments of the present invention, R N1 and R N2 Each can independently represent an alkenyl group containing 3-8 (e.g., 3, 4, 5, 6, 7 or 8) carbon atoms in a branched chain.

[0052] In some embodiments of the present invention, Z B1 and Z B2 Each can independently represent a single bond, -CO-O-, -CH2O-, -OCH2-, -CH=CH-, -CH2CH2-, or -(CH2)4-.

[0053] In some embodiments of the present invention, L B1 and L B2 Each can be represented independently as -H.

[0054] In this invention, when n B1 When the ratio is 2, the compound contains two rings. These two rings They can have the same structure or different structures. For example, one can be... The other is In this invention, the terms "same" or "different" have the same meaning.

[0055] In some embodiments of the present invention, the compounds of general formula I are selected from the group consisting of the following compounds:

[0056]

[0057] as well as

[0058]

[0059] Wherein, R1 represents a straight-chain alkyl group containing 1-12 (e.g., 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, or 12) carbon atoms, or a branched alkyl group containing 3-12 (e.g., 3, 4, 5, 6, 7, 8, 9, 10, 11, or 12) carbon atoms. One or more non-adjacent -CH2- groups of the straight-chain alkyl group containing 1-12 carbon atoms and the branched alkyl group containing 3-12 carbon atoms may be independently replaced by -CH=CH-, -C≡C-, -O-, -CO-, -CO-O-, or -O-CO-.

[0060] R2 represents a straight-chain alkyl group containing 1-12 (e.g., 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 or 12) carbon atoms.

[0061] In some embodiments of the present invention, in order to achieve a faster response speed while maintaining appropriate elastic constants, transmittance, and contrast, R1 independently represents a straight-chain alkyl group containing 3-12 (e.g., 3, 4, 5, 6, 7, 8, 9, 10, 11, or 12) carbon atoms, or a branched alkyl group containing 3-12 (e.g., 3, 4, 5, 6, 7, 8, 9, 10, 11, or 12) carbon atoms.

[0062] In some embodiments of the present invention, in order to achieve a faster response speed while maintaining appropriate elastic constants, transmittance, and contrast, R2 independently represents a straight-chain alkyl group containing 1-3 carbon atoms. In some embodiments of the present invention, R2 independently represents a methyl group.

[0063] In some embodiments of the present invention, in order to have a faster response speed while maintaining appropriate elastic constants, transmittance and contrast, the compound of general formula I comprises at least one (e.g. two, three, four or five) compounds selected from the group consisting of compounds of general formula I-1, compounds of general formula I-3, compounds of general formula I-6, compounds of general formula I-9 and / or compounds of general formula I-11.

[0064] In some embodiments of the present invention, R1 represents ethyl.

[0065] In some embodiments of the present invention, in order to have a faster response speed while maintaining appropriate elastic constants, transmittance and contrast, R1 represents propyl, butyl, pentyl or hexyl.

[0066] In some embodiments of the present invention, R1 represents...

[0067] In some embodiments of the present invention, R1 represents...

[0068] In some embodiments of the present invention, R1 represents...

[0069] In some embodiments of the present invention, in order to achieve a faster response speed while maintaining appropriate elastic constants, transmittance, and contrast, the compound of general formula I comprises at least one (e.g., two, three, four, or five) compounds selected from the group consisting of the following compounds:

[0070]

[0071]

[0072] as well as

[0073]

[0074] R2 independently represents a straight-chain alkyl group containing 1 to 3 (e.g., 1, 2, or 3) carbon atoms.

[0075] In some embodiments of the present invention, it is preferable to adjust the content of the compound of general formula I so that the liquid crystal composition containing it has a faster response speed while maintaining appropriate elastic constant, transmittance and contrast.

[0076] In some embodiments of the invention, the compound of general formula I accounts for 0.1% to 30% by weight of the liquid crystal composition (inclusive of any value or subrange within this range), for example, 0.1%, 0.3%, 0.5%, 0.7%, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29%, 30%, or a range between any two of these values. Preferably, the compound of general formula I accounts for 0.1% to 20% by weight of the liquid crystal composition.

[0077] In some embodiments of the invention, the liquid crystal composition comprises at least one (e.g., two, three, four, or five) compounds selected from the group consisting of compounds of general formula I-1, general formula I-3, general formula I-6, general formula I-9, and / or general formula I-11, in a weight percentage of 0.1% to 20% (inclusive of any value or subrange within this range) of the liquid crystal composition, for example, 0.1%, 0.3%, 0.5%, 0.7%, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, or a range between any two of these values.

[0078] In some embodiments of the present invention, the compounds of general formula II are selected from the group consisting of the following compounds:

[0079]

[0080]

[0081] as well as

[0082]

[0083] R3 represents a straight-chain or branched alkyl group containing 1-12 (e.g., 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 or 12) carbon atoms, or a straight-chain or branched alkoxy group containing 1-12 (e.g., 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 or 12) carbon atoms.

[0084] In some embodiments of the present invention, in order to obtain a large elastic constant, especially a large flexural elastic constant K... 33 Compounds of general formula II also exhibit high dielectric anisotropy and contain at least one (e.g., two, three, four, or five) compounds selected from the group consisting of the following compounds:

[0085]

[0086]

[0087] as well as

[0088]

[0089] R3 represents a straight-chain or branched alkyl group containing 1-12 (e.g., 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 or 12) carbon atoms, or a straight-chain or branched alkoxy group containing 1-12 (e.g., 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 or 12) carbon atoms.

[0090] In some embodiments of the invention, R3 independently represents a straight-chain or branched alkoxy group containing 1-12 (e.g., 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 or 12) carbon atoms.

[0091] In some embodiments of the invention, R3 independently represents a straight-chain or branched alkyl group containing 1-12 (e.g., 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, or 12) carbon atoms, or a straight-chain or branched alkoxy group containing 1-12 (e.g., 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, or 12) carbon atoms.

[0092] In some embodiments of the present invention, the content of the compound of general formula II is adjusted so that the liquid crystal composition containing it has a large elastic constant, especially a large flexural elastic constant K. 33 It also has high dielectric anisotropy.

[0093] In some embodiments of the invention, the compound of formula II accounts for 0.1% to 30% by weight of the liquid crystal composition (inclusive of any value or subrange within this range), for example, 0.1%, 0.3%, 0.5%, 0.7%, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29%, 30%, or a range between any two of these values. Preferably, the compound of formula II accounts for 0.1% to 25% by weight of the liquid crystal composition.

[0094] In some embodiments of the present invention, in order to obtain a larger elastic constant, higher transmittance, lower rotational viscosity, better low-temperature storage stability, and better low-temperature miscibility, the compound of formula II comprises at least one (e.g., two, three, four, or five) compounds selected from formula II-1, formula II-2, and formula II-5, which constitute 0.1% to 25% (inclusive of any value or subrange within this range) of the weight percentage of the liquid crystal composition, for example, 0.1%, 0.3%, 0.5%, 0.7%, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24%, 25%, or a range between any two of these values.

[0095] In some embodiments of the present invention, in order to obtain a larger elastic constant, higher transmittance, lower rotational viscosity, better low-temperature storage stability, and better low-temperature miscibility, the compound of formula II comprises at least one (e.g., two, three, four, or five) compounds selected from the group consisting of compounds of formula II-1 and formula II-5, which constitute 1% to 25% (inclusive of any value or subrange within this range) of the weight percentage of the liquid crystal composition, for example, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24%, 25%, or a range between any two of these values.

[0096] In some embodiments of the present invention, in order to obtain a larger elastic constant, higher transmittance, lower rotational viscosity, better low-temperature storage stability, and better low-temperature miscibility, the compound of formula II comprises at least one (e.g., two, three, four, or five) compounds of formula II-1, which constitute 1% to 20% (inclusive of any value or subrange within this range) of the weight percentage of the liquid crystal composition, for example, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, or a range between any two of these values.

[0097] In some embodiments of the invention, the compound of general formula F accounts for 0.1% to 35% by weight of the liquid crystal composition, for example, 0.1%, 0.5%, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 8.5%, 9%, 9.5%, 10%, 10.5%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29%, 30%, 31%, 32%, 33%, 34%, 35%, or a range between any two of these values.

[0098] In some embodiments of the present invention, compounds of general formula F are selected from the group consisting of:

[0099]

[0100]

[0101]

[0102]

[0103] as well as

[0104]

[0105] Among them, R F1 and R F2 Each of the following independently represents -H, halogen, a straight-chain or branched alkyl group containing 1-10 (e.g., 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10) carbon atoms, or a straight-chain or branched alkenyl group containing 2-10 (e.g., 2, 3, 4, 5, 6, 7, 8, 9, or 10) carbon atoms, wherein one or more non-adjacent -CH2- groups of the straight-chain or branched alkyl group containing 1-10 carbon atoms can be independently replaced by -C≡C-, -O-, -S-, -CO-, -CO-O-, or -O-CO-, and the 1-10 One or more -H atoms in a straight-chain or branched alkyl group containing 2-10 carbon atoms may be independently replaced by -F or -Cl; one or more non-adjacent -CH2- atoms in a straight-chain or branched alkenyl group containing 2-10 carbon atoms may be independently replaced by -C≡C-, -O-, -S-, -CO-, -CO-O-, or -O-CO-; and one or more -H atoms in a straight-chain or branched alkenyl group containing 2-10 carbon atoms may be independently replaced by -F or -Cl.

[0106] Z F1 It represents a single bond, -O-, -CO-O-, -O-CO-, -CH2O-, -OCH2-, -CH=CH-, -C≡C-, -CH2CH2-, -CF2CF2-, -(CH2)4-, -CF2O-, or -OCF2-;

[0107] R F2 'Indicates a straight-chain or branched alkoxy or oxoalkoxy group containing 1-11 (e.g., 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 or 11) carbon atoms;

[0108] R F2 "" indicates a straight-chain or branched alkyl or oxoalkoxy group containing 1-10 (e.g., 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10) carbon atoms;

[0109] X F1 and X F2 Each can be represented independently as -CH2- or -O-;

[0110] n F3 Representing integers from 1 to 5; and

[0111] R F3It refers to a straight-chain or branched alkyl group containing 1-5 (e.g., 1, 2, 3, 4 or 5) carbon atoms, a straight-chain or branched alkoxy or oxoalkoxy group containing 1-4 (e.g., 1, 2, 3 or 4) carbon atoms, or a straight-chain or branched alkenyl group containing 2-5 (e.g., 2, 3, 4 or 5) carbon atoms.

[0112] In some embodiments of the present invention, when R F3 When representing a straight-chain or branched alkoxy group containing 1-4 carbon atoms, -O(CH2)n F3 OR F3 The oxygen atoms in the structure are not directly connected.

[0113] In some embodiments of the present invention, R F1 and R F2 Each of these terms independently represents a straight-chain or branched alkyl group containing 1 to 10 (e.g., 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10) carbon atoms, a straight-chain or branched alkoxy or oxoalkoxy group containing 1 to 10 (e.g., 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10) carbon atoms, a straight-chain or branched alkenyl group containing 2 to 10 (e.g., 2, 3, 4, 5, 6, 7, 8, 9, or 10) carbon atoms, and a straight-chain or branched alkenyl group containing 2 to 10 (e.g., 2, 3, 4, 5, 6, 7, 8, 9, or 10) carbon atoms.

[0114] In some embodiments of the present invention, in order to obtain greater dielectric anisotropy, greater elastic constant and faster response speed, the compound of general formula F includes at least one (e.g., two or three) compounds selected from the group consisting of compounds of general formula F-1, general formula F-3, general formula F-4, general formula F-5, general formula F-6, general formula F-32, general formula F-33, general formula F-34, general formula F-35, general formula F-36, general formula F-37, general formula F-38, general formula F-39, general formula F-40, general formula F-41, general formula F-46, general formula F-47, general formula F-48, and general formula F-49.

[0115] In some embodiments of the present invention, in order to obtain greater dielectric anisotropy, greater elastic constant and faster response speed, the compound of general formula F includes at least one (e.g., two or three) compound selected from the group consisting of compounds of general formula F-1, general formula F-3, general formula F-4, general formula F-5 and general formula F-6.

[0116] In some embodiments of the present invention, in order to obtain greater dielectric anisotropy, greater elastic constant and faster response speed, the compound of general formula F includes at least one (e.g., two or three) compounds selected from the group consisting of compounds of general formula F-32, general formula F-33, general formula F-37, general formula F-39, general formula F-40, general formula F-46 and general formula F-49.

[0117] In some embodiments of the present invention, in order to obtain greater dielectric anisotropy, greater elastic constant and faster response speed, the compound of general formula F comprises at least one (e.g., two or three) compounds selected from the group consisting of compounds of general formula F-1, general formula F-3, general formula F-4, general formula F-5 and general formula F-6, and at least one (e.g., two or three) compounds selected from the group consisting of compounds of general formula F-32, general formula F-33, general formula F-37, general formula F-39, general formula F-40, general formula F-46 and general formula F-49.

[0118] In some embodiments of the present invention, in order to obtain greater dielectric anisotropy, greater elastic constant, and faster response speed, compounds of general formula F-1, general formula F-3, general formula F-4, general formula F-5, general formula F-6, general formula F-32, general formula F-33, general formula F-34, general formula F-35, general formula F-36, general formula F-37, general formula F-38, general formula F-39, general formula F-40, general formula F-41, and general formula F-46 are selected. The compounds of general formula F, which are the group consisting of compounds of general formula F-47, compounds of general formula F-48, and compounds of general formula F-49, account for 1% to 30% by weight of the liquid crystal composition, for example, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 8.5%, 9%, 9.5%, 10%, 10.5%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29%, 30%, or a range between any two of these values.

[0119] In some embodiments of the present invention, in order to obtain greater dielectric anisotropy, greater elastic constant, and faster response speed, the compound of general formula F, comprising at least one (e.g., two, three) compounds selected from the group consisting of compounds of general formula F-1, general formula F-3, general formula F-4, general formula F-5, and general formula F-6, accounts for 1%-30% by weight of the liquid crystal composition, for example, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 8.5%, 9%, 9.5%, 10%, 10.5%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29%, 30%, or a range between any two of these values.

[0120] In some embodiments of the present invention, in order to obtain greater dielectric anisotropy, greater elastic constant, and faster response speed, compounds of general formula F comprising at least one (e.g., two or three) compounds selected from the group consisting of compounds of general formula F-32, general formula F-33, general formula F-37, general formula F-39, general formula F-40, general formula F-46, and general formula F-49 occupy the liquid crystal group. The weight percentage of the compound is 1%-30%, for example, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 8.5%, 9%, 9.5%, 10%, 10.5%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29%, 30%, or a range between any two of these values.

[0121] In some embodiments of the present invention, in order to obtain greater dielectric anisotropy, greater elastic constant, and faster response speed, the compound of general formula F contains at least one (e.g., two, three) as a percentage of 0%-30% by weight of the liquid crystal composition, for example, 0%, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 8.5%, 9%, 9.5%, 10%, 10.5%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29%, 30%, or a range between any two of these values, selected from compounds of general formula F-1, general formula F-3, general formula F-4, general formula F-5, and general formula F-6. Compounds of the group consisting of compounds; and / or compounds of the group consisting of at least one (e.g., two, three) comprising 1% to 30% by weight of the liquid crystal composition, such as 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 8.5%, 9%, 9.5%, 10%, 10.5%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29%, 30%, or a range between any two of these values, selected from compounds of general formula F-32, compounds of general formula F-33, compounds of general formula F-37, compounds of general formula F-39, compounds of general formula F-40, compounds of general formula F-46, and compounds of general formula F-49.

[0122] In some embodiments of the present invention, the compounds of general formula M are selected from the group consisting of the following compounds:

[0123]

[0124]

[0125]

[0126] Among them, R M1 and R M2 Each can be independently represented as a straight-chain alkyl group containing 1-12 carbon atoms, or a branched alkyl group containing 3-12 carbon atoms. Wherein, one or more non-adjacent -CH2- groups of the straight-chain alkyl group containing 1-12 carbon atoms or the branched alkyl group containing 3-12 carbon atoms can be independently replaced by -CH=CH-, -C≡C-, -O-, -CO-, -CO-O-, or -O-CO-, provided that when one or more non-adjacent -CH2- groups of the straight-chain alkyl group containing 1-12 carbon atoms or the branched alkyl group containing 3-12 carbon atoms are independently replaced by -CH=CH-, the terminal groups of general formulas M-1, M-3, M-6, M-39, M-40, and M-41 are not...

[0127] In some embodiments of the present invention, in order to obtain a suitablely high clearing point, a large elastic constant, a high penetration rate, a low rotational viscosity, good low-temperature storage stability, and good low-temperature miscibility, the compound of general formula M comprises at least one (e.g., two, three, four, or five) compounds selected from the group consisting of compounds of general formula M-1, general formula M-2, general formula M-5, general formula M-8, general formula M-11, general formula M-12, general formula M-13, general formula M-16, general formula M-17, general formula M-18, general formula M-22, and general formula M-31.

[0128] In some embodiments of the invention, the compound of general formula M accounts for 0.1% to 50% (inclusive of any value or subrange within this range) of the liquid crystal composition, for example, 0.1%, 0.3%, 0.5%, 0.7%, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 17%, 18%, 20%, 22%, 23%, 24%, 25%, 27%, 28%, 30%, 31%, 32%, 33%, 35%, 37%, 38%, 40%, 42%, 44%, 45%, 46%, 48%, 50%, or a range between any two of these values. Preferably, the compound of general formula M accounts for 10% to 40% of the liquid crystal composition by weight.

[0129] In some embodiments of the present invention, in order to obtain a suitablely high clearing point, a large elastic constant, a high transmittance, a low rotational viscosity, good low-temperature storage stability, and good low-temperature miscibility, the liquid crystal composition comprises at least one (e.g., two, three, four, or five) compounds selected from the group consisting of compounds of general formula M-1, general formula M-3, general formula M-6, general formula M-39, general formula M-40, and / or general formula M-41, wherein the compounds comprise 0.1% to 40% (inclusive) of the liquid crystal composition by weight. Any value or subrange between these values, such as 0.1%, 0.3%, 0.5%, 0.7%, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29%, 30%, 31%, 32%, 33%, 34%, 35%, 36%, 37%, 38%, 39%, 40%, or a range between any two of these values.

[0130] In some embodiments of the present invention, in order to obtain a suitablely high clearing point, a large elastic constant, a high transmittance, a low rotational viscosity, good low-temperature storage stability, and good low-temperature miscibility, the liquid crystal composition comprises at least one (e.g., two, three, four, or five) compounds of general formula M-11, general formula M-12, general formula M-13, general formula M-16, general formula M-17, general formula M-21, general formula M-24, and / or a group of compounds of general formula M-26. The compounds in the group comprising 0.1% to 30% by weight of the liquid crystal composition (inclusive of any value or subrange within this range), for example, 0.1%, 0.5%, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29%, 30%, or any two of these values.

[0131] In some embodiments of the present invention, in order to obtain a larger elastic constant, higher penetration rate, and lower rotational viscosity, R N1 and R N2Each of these terms independently represents a straight-chain alkyl group containing 1-8 (e.g., 1, 2, 3, 4, 5, 6, 7, or 8) carbon atoms, a branched alkyl group containing 3-8 (e.g., 3, 4, 5, 6, 7, or 8) carbon atoms, a straight-chain alkoxy group containing 1-8 (e.g., 1, 2, 3, 4, 5, 6, 7, or 8) carbon atoms, a branched alkoxy group containing 3-8 (e.g., 3, 4, 5, 6, 7, or 8) carbon atoms, a straight-chain alkenyl group containing 2-8 (e.g., 2, 3, 4, 5, 6, 7, or 8) carbon atoms, or a branched alkenyl group containing 3-8 (e.g., 3, 4, 5, 6, 7, or 8) carbon atoms.

[0132] In some embodiments of the present invention, in order to obtain a larger elastic constant, higher penetration rate, and lower rotational viscosity, Z B1 and Z B2 Each can independently represent a single bond, -CO-O-, -CH2O-, -CH=CH-, -C≡C-, or -CH2CH2-.

[0133] In some embodiments of the present invention, in order to obtain a larger elastic constant, higher penetration rate, and lower rotational viscosity, L B1 and L B2 Both represent -H.

[0134] In some embodiments of the present invention, compounds of general formula N are selected from the group consisting of the following compounds:

[0135]

[0136]

[0137]

[0138] Among them, R N1 and R N2 Each can be independently represented as a straight-chain alkyl group containing 1-12 carbon atoms, or a branched alkyl group containing 3-12 carbon atoms. Wherein, one or more non-adjacent -CH2- groups of the straight-chain alkyl group containing 1-12 carbon atoms or the branched alkyl group containing 3-12 carbon atoms may be independently replaced by -CH=CH-, -C≡C-, -O-, -CO-, -CO-O-, or -O-CO-, provided that when one or more non-adjacent -CH2- groups of the straight-chain alkyl group containing 1-12 carbon atoms or the branched alkyl group containing 3-12 carbon atoms are independently replaced by -CH=CH-, the end group of general formula N-17 is not...

[0139] In some embodiments of the present invention, it is preferable to adjust the content of the compound of general formula N so that the liquid crystal composition containing it has a large elastic constant, high transmittance and low rotational viscosity.

[0140] In some embodiments of the present invention, compounds of general formula N are selected from the group consisting of the following compounds:

[0141]

[0142] Among them, R N1 This refers to straight-chain alkyl groups containing 1-12 carbon atoms, and branched alkyl groups containing 3-12 carbon atoms.

[0143]

[0144] R N2 Independently representing a straight-chain alkyl or alkoxy group containing 1-12 carbon atoms, or a branched-chain alkyl or alkoxy group containing 3-12 carbon atoms.

[0145] In some embodiments of the invention, the compound of general formula N is selected from at least one compound comprising 0%-35% (inclusive of any value or subrange within this range) of the weight percentage of the liquid crystal composition, for example, 0.1%, 0.3%, 0.5%, 0.7%, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29%, 30%, 31%, 32%, 33%, 34%, 35%, or any two of these values, within the group consisting of the following compounds:

[0146]

[0147]

[0148] Among them, R N1 express

[0149] R N2 Independently representing a straight-chain alkyl or alkoxy group containing 1-12 carbon atoms, or a branched-chain alkyl or alkoxy group containing 3-12 carbon atoms.

[0150] In some embodiments of the present invention, the compound of general formula N accounts for 0.1%-70% (inclusive of any value or subrange within this range) of the weight percentage of the liquid crystal composition, for example, 0.1%, 0.3%, 0.5%, 0.7%, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29%, 30%, 31%, 32%. The percentages are 33%, 34%, 35%, 36%, 37%, 38%, 39%, 40%, 41%, 42%, 43%, 44%, 45%, 46%, 47%, 48%, 49%, 50%, 51%, 52%, 53%, 54%, 55%, 56%, 57%, 58%, 59%, 60%, 61%, 62%, 63%, 64%, 65%, 66%, 67%, 68%, 69%, 70%, or a range between any two of these values. Preferably, the compound of general formula N accounts for 0.1% to 65% of the weight percentage of the liquid crystal composition.

[0151] In some embodiments of the present invention, in order to obtain a larger elastic constant, higher penetration and lower rotational viscosity, the compound of general formula N comprises at least one (e.g., two, three, four or five) compounds selected from the group consisting of compounds of general formula N-1, general formula N-2, general formula N-5, general formula N-6, general formula N-7, general formula N-13, general formula N-15, general formula N-16, general formula N-17, general formula N-21, general formula N-23, general formula N-24, general formula N-25, general formula N-26, general formula N-27, general formula N-28, general formula N-29, general formula N-30, general formula N-38, general formula N-39 and general formula N-40.

[0152] In some embodiments of the present invention, in order to obtain a larger elastic constant, higher penetration and lower rotational viscosity, the compound of general formula N contains at least one (e.g., two, three, four or five) compounds selected from the group consisting of compounds of general formula N-1, general formula N-2, general formula N-5, general formula N-6 and general formula N-7.

[0153] In some embodiments of the present invention, in order to obtain a larger elastic constant, higher penetration and lower rotational viscosity, the compound of general formula N comprises at least one (e.g., two, three, four or five) compounds selected from the group consisting of compounds of general formula N-13, general formula N-15, general formula N-16, general formula N-17, general formula N-21, general formula N-23, general formula N-24, general formula N-25, general formula N-26, general formula N-27, general formula N-28, general formula N-29, general formula N-30, general formula N-38, general formula N-39 and general formula N-40.

[0154] In some embodiments of the present invention, in order to obtain a larger elastic constant, higher transmittance, and lower rotational viscosity, the compound of general formula N comprises at least one (e.g., two, three, four, or five) compounds selected from the group consisting of compounds of general formula N-1, general formula N-2, general formula N-5, general formula N-6, and general formula N-7, which constitute 0%-45% (inclusive of any value or subrange within this range) of the liquid crystal composition, for example, 0.1%, 0.3%, 0.5%, 0. 7%, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29%, 30%, 31%, 32%, 33%, 34%, 35%, 36%, 37%, 38%, 39%, 40%, 41%, 42%, 43%, 44%, 45%, or a range between any two of these values.

[0155] In some embodiments of the present invention, in order to obtain a larger elastic constant, higher transmittance, and lower rotational viscosity, the compound of general formula N comprises at least one (e.g., two, three, four, or five) compounds selected from the group consisting of compounds of general formula N-13, general formula N-15, general formula N-16, general formula N-17, general formula N-21, general formula N-23, general formula N-24, general formula N-25, general formula N-26, general formula N-27, general formula N-28, general formula N-29, general formula N-30, general formula N-32, general formula N-38, general formula N-39, and general formula N-40, which constitute a percentage by weight of the liquid crystal composition. The percentage ranges from 0.1% to 55% (inclusive of any value or subrange within this range), for example: 0.1%, 0.3%, 0.5%, 0.7%, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24%. 25%, 26%, 27%, 28%, 29%, 30%, 31%, 32%, 33%, 34%, 35%, 36%, 37%, 38%, 39%, 40%, 41%, 42%, 43%, 44%, 45%, 46%, 47%, 48%, 49%, 50%, 51%, 52%, 53%, 54%, 55%, or a range between any two of these values.

[0156] In some embodiments of the invention, the compound of general formula N comprises at least one (e.g., two, three, four, or five) in a weight percentage of 0%-45% (inclusive of any value or subrange within this range) of the liquid crystal composition, for example, 0.1%, 0.3%, 0.5%, 0.7%, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29%, 30%, 3 Compounds selected from the group consisting of compounds of general formula N-1, general formula N-2, general formula N-5, general formula N-6, and general formula N-7, or at least one (e.g., two, three, four, or five) constitute 0.1% to 55% (inclusive of any value or subrange) of the liquid crystal composition by weight, such as 0.1%, 0.3%, 0.5%, 1%, 32%, 33%, 34%, 35%, 36%, 37%, 38%, 39%, 40%, 41%, 42%, 43%, 44%, 45%, or any two of these values, and / or at least one (e.g., two, three, four, or five) constitute 0.1% to 55% (inclusive of any value or subrange) of the liquid crystal composition by weight, for example, 0.1%, 0.3%, 0.5%. %, 0.7%, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29%, 30%, 31%, 32%, 33%, 34%, 35%, 36%, 37%, 38%, 39%, 40%, 41%, 42%, 43%, 44%, 45%, 46%, 47%, 48%, 49%, 50%, 51%, 52%, 53%, 54%, 5 Compounds selected from the group consisting of compounds of general formula N-13, general formula N-15, general formula N-16, general formula N-17, general formula N-21, general formula N-23, general formula N-24, general formula N-25, general formula N-26, general formula N-27, general formula N-28, general formula N-29, general formula N-30, general formula N-32, general formula N-38, general formula N-39, and general formula N-40.

[0157] In this invention, "can be replaced by... independently" means that it can be replaced or not, that is, being replaced or not being replaced both fall within the protection scope of this invention; the same applies to "can be replaced by... independently"; moreover, the positions of "replace" and "substitute" are arbitrary.

[0158] In this invention, short straight lines on one or both sides of a group represent an access bond, not a methyl group (e.g., methyl groups). The short line on the left and The short straight lines on both sides represent the connecting bonds that connect to the main structure of the compound.

[0159] In this invention, the halogen includes halogen elements such as fluorine, chlorine, bromine, or iodine; the same descriptions used below have the same meaning.

[0160] In this invention, the halogenation refers to the substitution of at least one hydrogen atom in the halogenated group by a halogen (fluorine, chlorine, bromine, or iodine, etc.).

[0161] In this invention, the numerical range involved in defining the number of carbon atoms in the group refers to the number of carbon atoms being any of the selectable integers within the defined range. For example, the number of carbon atoms from 1 to 10 can be 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10, and so on.

[0162] In addition to the compounds described above, the liquid crystal compositions of the present invention may also contain any one or a combination of at least two of the following: conventional nematic liquid crystals, smectic liquid crystals, cholesteric liquid crystals, polymerizable monomers, and additives.

[0163] In a preferred embodiment, the liquid crystal composition of the present invention further includes at least one additive.

[0164] In a preferred embodiment, the additive of the present invention includes any one or a combination of at least two of the following: dopant, antioxidant, ultraviolet absorber, infrared absorber, and light stabilizer.

[0165] The following shows possible dopants that are preferably added to the liquid crystal composition of the present invention:

[0166]

[0167] as well as

[0168]

[0169] In this context, * indicates a chiral site.

[0170] In some embodiments of the present invention, the weight percentage of dopant in the liquid crystal composition is 0%-5%; preferably, the weight percentage of dopant in the liquid crystal composition is 0.01%-1%.

[0171] Furthermore, the antioxidants, light stabilizers, and other additives used in the liquid crystal composition of the present invention are preferably the following substances:

[0172]

[0173]

[0174]

[0175] Where n represents a positive integer from 1 to 12; n² represents a positive integer from 1 to 18; + "" indicates a free radical.

[0176] In some embodiments of the present invention, the weight percentage of the light stabilizer in the liquid crystal composition is 0%-5%; preferably, the weight percentage of the light stabilizer in the liquid crystal composition is 0.01%-1%, and more preferably 0.01%-0.1%.

[0177] In a second aspect, the present invention provides a liquid crystal display device comprising the aforementioned liquid crystal composition.

[0178] Thirdly, the present invention provides an application of the aforementioned liquid crystal composition in a liquid crystal display device, particularly in fast-response liquid crystal display modes such as VA, PSVA, IPS, and NFFS.

[0179] Compared with the prior art, the present invention has the following beneficial effects:

[0180] The liquid crystal composition provided by this invention, through the mutual compounding of specific structures and contents of compounds, maintains appropriate dielectric anisotropy, good optical anisotropy, and good clearing point, while taking into account the performance advantages of compounds containing terminal methyl alkenyl structures. It also has a large elastic constant, high transmittance, and low rotational viscosity, so that liquid crystal display devices containing it have a faster response speed, higher contrast ratio, and wider operating temperature range, which helps to improve the display effect of liquid crystal materials. It is suitable for fast-response display modes such as VA, PSVA, IPS, and NFFS. Detailed Implementation

[0181] The technical solution of the present invention will be further illustrated below through specific embodiments. Those skilled in the art should understand that the embodiments are merely illustrative of the present invention and should not be considered as specific limitations thereof.

[0182] For ease of explanation, in the following embodiments and comparative examples, the group structures of each component in the liquid crystal composition are represented by the codes listed in Table 1:

[0183] Table 1. Structure codes of compound groups in liquid crystal compositions.

[0184]

[0185]

[0186] Take the following compound with the following structural formula as an example:

[0187]

[0188] If the structural formula is represented by the codes listed in Table 1, it can be expressed as: nCCGF, where n in the code represents the number of C atoms in the alkyl group at the left end. For example, if n is "3", it means that the alkyl group is -C3H7. In the code, C represents 1,4-cyclohexylene, G represents 2-fluoro-1,4-phenyleneene, and F represents fluorine substituent.

[0189] The abbreviations for the test items in the following examples and comparative examples are as follows:

[0190] Cp Clearing point (nematic-isotropic phase transition temperature, °C)

[0191] Δn Optical anisotropy (589nm, 25℃)

[0192] Δε dielectric anisotropy (1 kHz, 25 °C)

[0193] K 11 Elastic constant of the stretching curve (25℃)

[0194] K 33 Bending elastic constant (25℃)

[0195] γ1 Rotational viscosity (25℃)

[0196] RT (Response Time)

[0197] Tr penetration rate (%)

[0198] CR contrast

[0199] in,

[0200] Cp: ​​Measured using a melting point apparatus;

[0201] Δn: Measured using an Abbe refractometer under a sodium lamp (589nm) light source at 25℃;

[0202] Δε: Δε = ε ∥ -ε ⊥ , where ε ∥ ε is the dielectric constant parallel to the molecular axis. ⊥ The dielectric constant is perpendicular to the molecular axis. Test conditions: 25℃, 1kHz, VA type test box, box thickness 6μm;

[0203] K 11 and K 33The CV curve of the liquid crystal was obtained by testing and calculating using an LCR meter and a reverse parallel friction cell; Test conditions: VA type test cell, cell thickness 6μm, V = 0.1~20V;

[0204] γ1: Measured using the LCM-2 type liquid crystal property evaluation system; Test conditions: 25℃, 160-260V, test cell thickness 20μm;

[0205] RT: Measured using a DMS505 optoelectronic integrated tester at 25℃; Test conditions: 25℃, V100 drive, negative FFS type test box with a box thickness of 3.0μm;

[0206] Tr: The VT curve of the dimming device was tested using a DMS505 optoelectronic comprehensive tester. The maximum transmittance on the VT curve was taken as the transmittance of the liquid crystal. The test cell was a negative FFS type with a cell thickness of 3.0μm.

[0207] CR: The transmittance of the liquid crystal cell was measured using a DMS 505 tester at 255 grayscale voltage and 0 grayscale voltage, respectively, i.e., T. r255 and T r0 CR is made by T r255 / T r0 The test conditions were: 25℃ and 3.0μm thick FFS type test box.

[0208] The compounds used in the following examples can all be synthesized using well-known methods or obtained commercially. These synthetic techniques are conventional, and the resulting dye liquid crystal compositions have been tested and found to meet electronic compound standards.

[0209] The dye liquid crystal compositions were prepared according to the proportions of the dye liquid crystal compositions in the following examples. The dye liquid crystal compositions were prepared according to conventional methods in the art, such as mixing in a specified proportion by heating, ultrasound, suspension, etc.

[0210] Example 1

[0211] The liquid crystal composition of Example 1 was prepared according to the compounds listed in Table 2 and their weight percentages in the liquid crystal composition, and was filled between the two substrates of the liquid crystal display for performance testing.

[0212] Table 2. Formulation and performance parameter test results of liquid crystal compositions

[0213]

[0214] Example 2

[0215] The liquid crystal composition of Example 2 was prepared according to the compounds listed in Table 3 and their weight percentage in the liquid crystal composition, and was filled between the two substrates of the liquid crystal display for performance testing.

[0216] Table 3. Formulation and performance parameter test results of the liquid crystal composition.

[0217]

[0218] Example 3

[0219] The liquid crystal composition of Example 3 was prepared according to the compounds listed in Table 4 and their weight percentage in the liquid crystal composition, and was filled between the two substrates of the liquid crystal display for performance testing.

[0220] Table 4. Formulation and performance parameter test results of liquid crystal compositions

[0221]

[0222] Example 4

[0223] The liquid crystal composition of Example 4 was prepared according to the compounds listed in Table 5 and their weight percentage in the liquid crystal composition, and was filled between the two substrates of the liquid crystal display for performance testing.

[0224] Table 5. Formulation and performance parameter test results of the liquid crystal composition.

[0225]

[0226] Example 5

[0227] The liquid crystal composition of Example 5 was prepared according to the compounds listed in Table 6 and their weight percentage in the liquid crystal composition, and was filled between the two substrates of the liquid crystal display for performance testing.

[0228] Table 6. Formulation and performance parameter test results of the liquid crystal composition

[0229]

[0230]

[0231] Example 6

[0232] The liquid crystal composition of Example 6 was prepared according to the compounds listed in Table 7 and their weight percentage in the liquid crystal composition, and was filled between the two substrates of the liquid crystal display for performance testing.

[0233] Table 7. Formulation and performance parameter test results of the liquid crystal composition.

[0234]

[0235] Example 7

[0236] The liquid crystal composition of Example 7 was prepared according to the compounds listed in Table 8 and their weight percentage in the liquid crystal composition, and was filled between the two substrates of the liquid crystal display for performance testing.

[0237] Table 8. Formulation and performance parameter test results of the liquid crystal composition.

[0238]

[0239]

[0240] Example 8

[0241] The liquid crystal composition of Example 8 was prepared according to the compounds listed in Table 9 and their weight percentage in the liquid crystal composition, and was filled between the two substrates of the liquid crystal display for performance testing.

[0242] Table 9. Formulation and Performance Parameter Test Results of Liquid Crystal Compositions

[0243]

[0244] Example 9

[0245] The liquid crystal composition of Example 9 was prepared according to the compounds listed in Table 10 and their weight percentage in the liquid crystal composition, and was filled between the two substrates of the liquid crystal display for performance testing.

[0246] Table 10. Formulation and performance parameter test results of liquid crystal compositions

[0247]

[0248]

[0249] Comparative Example 1

[0250] The liquid crystal composition of Comparative Example 1 was prepared according to the compounds listed in Table 11 and their weight percentage in the liquid crystal composition, and was filled between the two substrates of the liquid crystal display for performance testing.

[0251] Table 11 Formulation and Performance Parameter Test Results of Liquid Crystal Compositions

[0252]

[0253] Comparative Example 2

[0254] The liquid crystal composition of Comparative Example 2 was prepared according to the compounds listed in Table 12 and their weight percentage in the liquid crystal composition, and was filled between the two substrates of the liquid crystal display for performance testing.

[0255] Table 12 Formulation and Performance Parameter Test Results of Liquid Crystal Compositions

[0256]

[0257]

[0258] Comparative Example 3

[0259] The liquid crystal composition of Comparative Example 3 was prepared according to the compounds listed in Table 13 and their weight percentage in the liquid crystal composition, and was filled between the two substrates of the liquid crystal display for performance testing.

[0260] Table 13 Formulation and Performance Parameter Test Results of Liquid Crystal Compositions

[0261]

[0262] As can be seen from the comparison of the embodiments and comparative examples of this application, the present invention, through the optimization of the structure and content of compounds of general formula I, general formula II and general formula F, enables the liquid crystal composition of the present invention to have a large elastic constant, high transmittance and low rotational viscosity while maintaining appropriate dielectric anisotropy, good optical anisotropy and good clearing point; thus enabling the liquid crystal display device containing it to have a fast response speed and a large contrast ratio.

[0263] In summary, this invention, through the specific structure and content of the compounds, enables the liquid crystal composition to maintain appropriate dielectric anisotropy, good optical anisotropy, and good clearing point, while possessing a large elastic constant, high transmittance, and low rotational viscosity. This results in liquid crystal display devices containing the composition exhibiting faster response speeds, higher contrast ratios, and wider operating temperature ranges. It also helps improve low-frequency displays and enhances the display effect of liquid crystal materials, making it particularly suitable for fast-response display modes such as VA, PSVA, IPS, and NFFS.

[0264] The applicant declares that the present invention is illustrated through the above embodiments to demonstrate a liquid crystal composition, a liquid crystal display device comprising the same, and their applications. However, the present invention is not limited to the above embodiments, i.e., it does not mean that the present invention must rely on the above embodiments to be implemented. Those skilled in the art should understand that any improvements to the present invention, equivalent substitutions of the raw materials of the product of the present invention, addition of auxiliary components, selection of specific methods, etc., all fall within the protection scope and disclosure scope of the present invention.

Claims

1. A liquid crystal composition, characterized in that, The liquid crystal composition comprises: At least one compound of general formula I: At least one compound of general formula II: At least one compound of general formula F: At least one compound of general formula M: At least one compound of the general formula N: in, R1 indicates a straight-chain alkyl group containing 1-12 carbon atoms, or a branched alkyl group containing 3-12 carbon atoms. One or more non-adjacent -CH2- groups of the straight-chain alkyl group containing 1-12 carbon atoms and the branched alkyl group containing 3-12 carbon atoms may be independently replaced by -CH=CH-, -C≡C-, -O-, -CO-, -CO-O-, or -O-CO-. R2 indicates a straight-chain alkyl group containing 1-12 carbon atoms; R3 represents a straight-chain or branched alkyl group containing 1-12 carbon atoms, wherein one or more non-adjacent -CH2- groups of the straight-chain or branched alkyl group containing 1-12 carbon atoms may be independently replaced by -CH=CH-, -C≡C-, -O-, -CO-, -CO-O- or -O-CO-. R F1 and R F2 Each can independently represent -H, halogen, or straight-chain or branched alkyl groups containing 1-12 carbon atoms. The alkyl group containing 1-12 carbon atoms, whether straight-chain or branched, One or more non-adjacent -CH2- can be independently replaced by -CH=CH-, -C≡C-, -O-, -S-, -CO-, -CO-O- or -O-CO-, and one or more -H in the straight-chain or branched alkyl group containing 1-12 carbon atoms can be independently replaced by -F or -Cl. R M1 R M2 R N1 and R N2 Each can be independently represented as a straight-chain alkyl group containing 1-12 carbon atoms, or a branched alkyl group containing 3-12 carbon atoms. Wherein, one or more non-adjacent -CH2- of the straight-chain alkyl containing 1-12 carbon atoms and the branched alkyl containing 3-12 carbon atoms can be independently replaced by -CH=CH-, -C≡C-, -O-, -CO-, -CO-O-, or -O-CO-. ring and ring Each represents independently in One or more non-adjacent -CH2- bonds in one or more rings can be replaced by -O- bonds, and at most two non-adjacent single bonds in one or more rings can be replaced by double bonds. One or more -H can be independently replaced by -CN, -F or -Cl, and -CH= in one or more rings can be replaced by -N=; ring and ring Each represents independently ring and ring Each represents independently The above One or more -H can be replaced by -F, -Cl, or -CN, and one or more -CH= in a ring can be replaced by -N=. One or more of the -CH2- can be replaced by -O-; X F Indicates -O-, -S-, or -CO-; L F1 and L F2 Each can be independently represented as -H, -F, -Cl, -CF3, or -OCF3; Z F1 and Z F2 Each can independently represent a single bond, -O-, -CO-O-, -O-CO-, -CH2O-, -OCH2-, -(CH2)2O-, -O(CH2)2-, -CH=CH-, -C≡C-, -CH2CH2-, -CF2CF2-, -(CH2)3-, -(CH2)4-, -CF2O-, or -OCF2-; n F1 and n F2 Each can be independently represented as 0, 1, or 2, where when n F1 When 2 is represented, the ring Same or different, where when n F2 When 2 is represented, the ring Same or different, Z F2 Same or different; n F4 Represents integers from 0 to 4; Z B1 and Z B2 Each can independently represent a single bond, -CO-O-, -O-CO-, -O-CO-O-, -CH2O-, -OCH2-, -CH=CH-, -C≡C-, -CH2CH2-, -CF2CF2-, -CF=CF-, -(CH2)4-, -CF2O-, or -OCF2-; n B1 Indicates 1, 2, or 3, n B2 Represents 0 or 1, where when n B1 When representing 2 or 3, the ring Same or different, Z B1 Same or different; L B1 and L B2 Each can be independently represented as -H, halogen, alkyl group containing 1-3 carbon atoms, or alkoxy group containing 1-3 carbon atoms; ring ring and ring Each represents independently in One or more -CH2- bonds can be replaced by -O- bonds, and single bonds in one or at most two rings can be replaced by double bonds. At most one -H in the halogen can be replaced by a halogen; Z M1 and Z M2 Each can independently represent a single bond, -CH2CH2-, -C≡C-, -CH=CH-, -(CH2)3-, -(CH2)4-, -CO-O-, -O-CO-, -CH2O-, -OCH2-, -CF2CF2-, -CF2O-, or -OCF2-; n M Represents 0, 1, or 2, where when n M When n represents 0, the compounds of general formula M do not include compounds of general formula I; when n represents 0, the compounds of general formula M do not include compounds of general formula I. M When 2 is represented, the ring Same or different, Z M2 Same or different; ring and ring Each represents independently The above One or more of the -CH2- can be replaced by -O-, wherein One or more -H can be replaced by -F, -Cl, or -CN, and one or more -CH= in a ring can be replaced by -N=; Preferably, Z B1 and Z B2 Each can independently represent a single bond, -CO-O-, -O-CO-, -CH2O-, -OCH2-, -CH=CH-, -C≡C-, -CH2CH2-, -CF2CF2-, -(CH2)4-, -CF2O-, or -OCF2-; Preferably, n B1 n represents 0, 1, 2, or 3. B2 Represents 0 or 1, and 0 ≤ n B1 +n B2 ≤3; when n B1 When representing 2 or 3, the ring Same or different, Z B1 Same or different; and The compounds of general formula N do not include the compounds of general formula II.

2. The liquid crystal composition according to claim 1, characterized in that, The compounds of general formula I are selected from the group consisting of the following compounds: as well as Optionally, the compound of general formula I accounts for 0.1%-30% of the weight percentage of the liquid crystal composition; optionally, the compound of general formula I comprises at least one (e.g., two, three, four or five) compounds selected from the group consisting of compounds of general formula I-1, compounds of general formula I-3, compounds of general formula I-6, compounds of general formula I-9 and compounds of general formula I-11.

3. The liquid crystal composition according to claim 1, characterized in that, The compounds of general formula II are selected from the group consisting of the following compounds: as well as R3 independently represents a straight-chain or branched alkyl group containing 1-12 carbon atoms, or a straight-chain or branched alkoxy group containing 1-12 carbon atoms.

4. The liquid crystal composition according to claim 1, characterized in that, In the compounds of general formula II, R3 independently represents a straight-chain or branched alkoxy group containing 1-12 carbon atoms. Optionally, R3 independently represents an alkyl group containing 1-12 carbon atoms, or a straight-chain or branched alkoxy group containing 1-12 carbon atoms.

5. The liquid crystal composition according to claim 1, characterized in that, The compound of formula II accounts for 0.1%-30% of the liquid crystal composition by weight. Optionally, the compound of formula II accounts for 0.1%-25% of the liquid crystal composition by weight. Optionally, the compound of formula II comprises at least one (e.g., two, three, four, or five) compound selected from the group consisting of compounds of formula II-1, formula II-2, and formula II-5, accounting for 0.1%-25% of the liquid crystal composition by weight. Optionally, the compound of formula II comprises at least one compound selected from the group consisting of compounds of formula II-1 and formula II-5, accounting for 1%-25% of the liquid crystal composition by weight. Optionally, the compound of formula II comprises at least one (compound of formula II-1, accounting for 1%-20% of the liquid crystal composition by weight).

6. The liquid crystal composition according to claim 1, characterized in that, Compounds of general formula F are selected from the group consisting of the following compounds: as well as Among them, R F1 and R F2 Each of the following can independently represent -H, halogen, a straight-chain or branched alkyl group containing 1-10 carbon atoms, or a straight-chain or branched alkenyl group containing 2-10 carbon atoms, wherein one or more non-adjacent -CH2- groups of the straight-chain or branched alkyl group containing 1-10 carbon atoms can be independently replaced by -C≡C-, -O-, -S-, -CO-, -CO-O-, or -O-CO-, and ...CO-O-, or -O-CO-, respectively. One or more -H in the group can be independently replaced by -F or -Cl; one or more non-adjacent -CH2- in the straight-chain or branched alkenyl group containing 2-10 carbon atoms can be independently replaced by -C≡C-, -O-, -S-, -CO-, -CO-O- or -O-CO-; and one or more -H in the straight-chain or branched alkenyl group containing 2-10 carbon atoms can be independently replaced by -F or -Cl. Z F1 This indicates single bonds, -O-, -CO-O-, -O-CO-, -CH2O-, -OCH2-, -CH=CH-, -C≡C-, -CH2CH2-, -CF2CF2-, -(CH2)4-, -CF2O- or -OCF2-; R F2 'Indicates a straight-chain or branched alkoxy group containing 1-11 carbon atoms; R F2 "Indicates a straight-chain or branched alkyl group containing 1-10 carbon atoms; X F1 and X F2 Each can be represented independently as -CH2- or -O-; n F3 Representing integers from 1 to 5; and R F3 This refers to a straight-chain or branched alkyl group containing 1-5 carbon atoms, a straight-chain or branched alkoxy group containing 1-4 carbon atoms, or a straight-chain or branched alkenyl group containing 2-5 carbon atoms, wherein, when R... F3 When representing a straight-chain or branched alkoxy group containing 1-4 carbon atoms, -O(CH2)n F3 OR F3 The oxygen atoms in the structure are not directly connected.

7. The liquid crystal composition according to claim 1, characterized in that, The compound of general formula F accounts for 0.1%-35% of the weight percentage of the liquid crystal composition.

8. The liquid crystal composition according to claim 1, characterized in that, Compounds of general formula F include at least one compound selected from the group consisting of compounds of general formula F-1, general formula F-3, general formula F-4, general formula F-5, general formula F-6, general formula F-32, general formula F-33, general formula F-34, general formula F-35, general formula F-36, general formula F-37, general formula F-38, general formula F-39, general formula F-40, general formula F-41, general formula F-46, general formula F-47, general formula F-48, and general formula F-49. Optionally, the compound of general formula F includes at least one compound selected from the group consisting of compounds of general formula F-1, general formula F-3, general formula F-4, general formula F-5, and general formula F-6. Optionally, the compound of general formula F comprises at least one compound selected from the group consisting of compounds of general formula F-32, general formula F-33, general formula F-37, general formula F-39, general formula F-40, general formula F-46, and general formula F-49. Optionally, the compound of general formula F comprises at least one compound selected from the group consisting of compounds of general formula F-1, general formula F-3, general formula F-4, general formula F-5, and general formula F-6, and at least one compound selected from the group consisting of compounds of general formula F-32, general formula F-33, general formula F-37, general formula F-39, general formula F-40, general formula F-46, and general formula F-49. Optionally, the compound of general formula F comprising at least one compound selected from the group consisting of a compound of general formula F-1, a compound of general formula F-3, a compound of general formula F-4, a compound of general formula F-5, a compound of general formula F-6, a compound of general formula F-32, a compound of general formula F-33, a compound of general formula F-34, a compound of general formula F-35, a compound of general formula F-36, a compound of general formula F-37, a compound of general formula F-38, a compound of general formula F-39, a compound of general formula F-40, a compound of general formula F-41, a compound of general formula F-46, a compound of general formula F-47, a compound of general formula F-48, and a compound of general formula F-49 accounts for 1% to 30% by weight of the liquid crystal composition; Optionally, the compound of general formula F, which comprises at least one compound selected from the group consisting of a compound of general formula F-1, a compound of general formula F-3, a compound of general formula F-4, a compound of general formula F-5, and a compound of general formula F-6, accounts for 1% to 30% by weight of the liquid crystal composition. Optionally, the compound of general formula F, comprising at least one compound selected from the group consisting of compounds of general formula F-32, general formula F-33, general formula F-37, general formula F-39, general formula F-40, general formula F-46, and general formula F-49, accounts for 1%-30% by weight of the liquid crystal composition. Optionally, the compound of general formula F includes at least one compound selected from the group consisting of compounds of general formula F-1, general formula F-3, general formula F-4, general formula F-5, and general formula F-6, accounting for 0%-30% by weight of the liquid crystal composition. And / or; at least one compound comprising 1% to 30% by weight of the liquid crystal composition, selected from the group consisting of compounds of general formula F-32, general formula F-33, general formula F-37, general formula F-39, general formula F-40, general formula F-46, and general formula F-49.

9. The liquid crystal composition according to claim 1, characterized in that, The compounds of general formula M are selected from the group consisting of the following compounds: Among them, R M1 and R M2 Each can be independently represented as a straight-chain alkyl group containing 1-12 carbon atoms, or a branched alkyl group containing 3-12 carbon atoms. Wherein, one or more non-adjacent -CH2- groups of the straight-chain alkyl group containing 1-12 carbon atoms or the branched alkyl group containing 3-12 carbon atoms can be independently replaced by -CH=CH-, -C≡C-, -O-, -CO-, -CO-O-, or -O-CO-, provided that when one or more non-adjacent -CH2- groups of the straight-chain alkyl group containing 1-12 carbon atoms or the branched alkyl group containing 3-12 carbon atoms are independently replaced by -CH=CH-, the terminal groups of general formulas M-1, M-3, M-6, M-39, M-40, and M-41 are not...

10. The liquid crystal composition according to claim 1, characterized in that, The compounds of general formula N are selected from the group consisting of the following compounds: Among them, R N1 and R N2 Each can be independently represented as a straight-chain alkyl group containing 1-12 carbon atoms, or a branched alkyl group containing 3-12 carbon atoms. Wherein, one or more non-adjacent -CH2- groups of the straight-chain alkyl group containing 1-12 carbon atoms or the branched alkyl group containing 3-12 carbon atoms may be independently replaced by -CH=CH-, -C≡C-, -O-, -CO-, -CO-O-, or -O-CO-, provided that when one or more non-adjacent -CH2- groups of the straight-chain alkyl group containing 1-12 carbon atoms or the branched alkyl group containing 3-12 carbon atoms are independently replaced by -CH=CH-, the end group of general formula N-17 is not...

11. The liquid crystal composition according to claim 1, characterized in that, The compound of general formula N accounts for 0.1%-70% of the weight percentage of the liquid crystal composition. Preferably, the compound of general formula N accounts for 0.1%-65% of the weight percentage of the liquid crystal composition. Preferably, the compound of general formula N comprises at least one compound selected from the group consisting of compounds of general formula N-1, general formula N-2, general formula N-5, general formula N-6, general formula N-7, general formula N-13, general formula N-15, general formula N-16, general formula N-17, general formula N-21, general formula N-23, general formula N-24, general formula N-25, general formula N-26, general formula N-27, general formula N-28, general formula N-29, general formula N-30, general formula N-38, general formula N-39, and general formula N-40. Preferably, the compound of general formula N comprises at least one compound selected from the group consisting of compounds of general formula N-1, general formula N-2, general formula N-5, general formula N-6, and general formula N-7. Preferably, the compound of general formula N comprises at least one compound selected from the group consisting of compounds of general formula N-13, general formula N-15, general formula N-16, general formula N-17, general formula N-21, general formula N-23, general formula N-24, general formula N-25, general formula N-26, general formula N-27, general formula N-28, general formula N-29, general formula N-30, general formula N-38, general formula N-39, and general formula N-40. Preferably, the at least one compound selected from the group consisting of compounds of general formula N-1, general formula N-2, general formula N-5, general formula N-6, and general formula N-7 accounts for 0%-45% by weight of the liquid crystal composition. Preferably, the at least one compound selected from the group consisting of compounds of general formula N-13, N-15, N-16, N-17, N-21, N-23, N-24, N-25, N-26, N-27, N-28, N-29, N-30, N-32, N-38, N-39, and N-40 accounts for 0.1% to 55% by weight of the liquid crystal composition. Preferably, the compound of formula N comprises at least one compound selected from the group consisting of compounds of formula N-1, formula N-2, formula N-5, formula N-6, and formula N-7, accounting for 0%-45% by weight of the liquid crystal composition, and / or at least one compound selected from the group consisting of compounds of formula N-13, formula N-15, and formula N-16, accounting for 0.1%-55% by weight of the liquid crystal composition. Compounds of the group consisting of compounds of general formula N-17, general formula N-21, general formula N-23, general formula N-24, general formula N-25, general formula N-26, general formula N-27, general formula N-28, general formula N-29, general formula N-30, general formula N-32, general formula N-38, general formula N-39, and general formula N-40.

12. A liquid crystal display device, characterized in that, The liquid crystal display device comprises the liquid crystal composition as described in any one of claims 1-11.

13. The liquid crystal composition according to any one of claims 1-11 is used in a liquid crystal display device, particularly in VA, PSVA, IPS, and NFFS liquid crystal display modes.

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