Liquid crystal composition, liquid crystal display device, and application thereof

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 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, high transmittance, low rotational viscosity, fast low-temperature response speed, and good low-temperature storage stability. This results in liquid crystal display devices comprising the same having fast response speeds and high contrast ratios, and can be applied to fast-response display modes such as VA, 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 dibenzohexane liquid crystal compound, 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] Compounds containing terminal alkenyl structures are a relatively novel class of liquid crystal monomer materials in recent years, with the advantage of fast response speed. Such liquid crystal monomer materials have been used in some typical applications of negative liquid crystal materials. However, compounds containing terminal alkenyl structures also have some disadvantages in application. If the proportion is too high, it will easily lead to a decrease in miscibility and affect the stability of low-temperature storage. At the same time, they have a low elastic constant, especially a low bending elastic constant, which in turn affects the contrast.

[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. However, they are slightly insufficient in liquid crystal display devices that require faster response time and higher contrast at low temperatures.

[0007] During the use of LCD panels, the flickering phenomenon caused by the polarity switching of the common electrode signal (Vcom) is generally referred to in the industry as the flicker phenomenon. The magnitude of the flicker value directly reflects the reliability of the LCD panel. Generally, the smaller the absolute value of the flicker (dB), the more prone the LCD panel is to flickering, and vice versa. Severe flickering can cause brightness fluctuations in the LCD panel, reducing display quality and causing physiological discomfort to viewers (such as eye fatigue, decreased vision, and dizziness). Therefore, the flicker value needs to be tested during the LCD monitor manufacturing process and controlled within a predetermined range.

[0008] To improve the response speed of liquid crystal display devices, it is necessary to minimize the rotational viscosity of the liquid crystal material. However, low-viscosity liquid crystal materials generally have lower clearing points and optical anisotropy. Therefore, when formulating liquid crystal compositions, other performance requirements must be considered while reducing viscosity.

[0009] 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

[0010] 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, while maintaining appropriate dielectric anisotropy, good optical anisotropy, and good clearing point, also possesses a large elastic constant, high transmittance, and low rotational viscosity. This results in liquid crystal display devices comprising the same exhibiting faster room temperature and low temperature response times, lower flicker, higher contrast ratio, and a wider operating temperature range, thus contributing to improved display performance of liquid crystal materials and making them suitable for fast-response display modes such as VA, IPS, and NFFS.

[0011] Technical solution

[0012] To achieve this objective, the present invention adopts the following technical solution:

[0013] In a first aspect, the present invention provides a liquid crystal composition comprising:

[0014] At least one compound of general formula I:

[0015]

[0016] At least one compound of general formula F:

[0017]

[0018] At least one compound of general formula M:

[0019]

[0020] At least one compound of the general formula N:

[0021]

[0022] Wherein, R1 represents -H, halogen, straight-chain or branched alkyl or alkoxy groups containing 1-12 carbon atoms, The alkyl groups containing 1-12 carbon atoms, whether straight-chain or branched, One or more non-adjacent -CH2- groups may be independently replaced by -CH=CH-, -C≡C-, -O-, -S-, -CO-, -CO-O-, or -O-CO-, and one or more -H groups may be independently replaced by -F or -Cl; one or more non-adjacent -CH2- groups in the straight-chain or branched alkoxy group containing 1-12 carbon atoms may be independently replaced by -CH=CH-, -C≡C-, -O-, -S-, -CO-, -CO-O-, or -O-CO-, and one or more -H groups may be independently replaced by -F, -Cl, replace,

[0023] R x The term represents -H, a straight-chain or branched alkyl group containing 1-12 carbon atoms, wherein one or more non-adjacent -CH2- groups can be independently replaced by -CH=CH-, -C≡C-, -O-, -S-, -CO-, -CO-O-, or -O-CO-, and one or at least two -H groups can be independently replaced by -F or -Cl. x With ring Any carbon atom in the middle is connected;

[0024] 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.

[0025] 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-.

[0026] ring and ring Each represents independently in, One or more of the -CH2- bonds can be replaced by -O- bonds, and one or more single bonds in the ring can be replaced by double bonds, wherein, One or more of the -H can be replaced by -F, -Cl, -CN, -CH3 or -OCH3, and one or more of the -CH= in the ring can be replaced by -N=;

[0027] ring express Among them, ring express

[0028] At that time, R x H represents the ring. express At this time, one or more H atoms on the benzene ring can be replaced by fluorine;

[0029] X1 represents -O-, -S-, -CO-, -CF2-, -NH-, or -NF-;

[0030] Y1 and Y2 each independently represent -H, halogen, alkyl halogroup or alkyl halogroup or alkoxy ...;

[0031] Z represents a single bond, -(CH2) aO- or -(CH2) a S-, where a represents an integer from 0 to 7, such as 1, 2, 3, 4, 5, etc.;

[0032] Z1 and Z2 independently represent single bonds, -O-, -S-, -CO-O-, -O-CO-, -CH2O-, -OCH2-, -CH=CH-, -C≡C-, -CH2CH2-, -CF2CF2-, -(CH2)4-, -CF2O-, or -OCF2-;

[0033] 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=;

[0034] X F Indicates -O-, -S-, or -CO-;

[0035] L F1 and L F2 Each can be independently represented as -H, -F, -Cl, -CF3, or -OCF3;

[0036] 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-;

[0037] n1, n2, and n3 each independently represent 0, 1, or 2. When n1 = 2, the ring... Whether they are the same or different, Z1 is the same or different, when n2 = 2, the ring Same or different, Z2 same or different, when n3 = 2, ring Same or different; 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 They can be the same or different, where when n F2 When 2 is represented, the ring They can be the same or different, ZF2 They can be the same or different;

[0038] n F4 Represents integers from 0 to 4;

[0039] 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-;

[0040] n B1 n represents 0, 1, 2, or 3. B2 Represents 0 or 1, and 0 ≤ n B1 +n B2 ≤3; where when n B1 When representing 2 or 3, the ring Same or different, Z B1 Same or different;

[0041] L B1 and L B2 Each can independently represent -H, halogen, alkyl group containing 1-3 (e.g., 1, 2 or 3) carbon atoms, or alkoxy group containing 1-3 (e.g., 1, 2 or 3) carbon atoms;

[0042] 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;

[0043] 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 2 is represented, the ring They can be the same or different, Z M2 They can be the same or different;

[0044] 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=.

[0045] In this invention, the expression "one or at least two -CH= in one or at least two rings can be replaced by -N=" refers to the number of -CH= replaced by -N=. This invention relates to the same expression, all of which have the same meaning.

[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, R N1 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 B2Each 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] This invention provides a novel liquid crystal composition, one inventive point of which is that by introducing a negative liquid crystal compound of Formula I, in combination with a compound of Formula N, it is possible to maintain an appropriate clearing point and appropriate optical anisotropy while having a large absolute value of dielectric anisotropy, good transmittance and long low-temperature storage time, thereby enabling liquid crystal display devices containing the composition to have better contrast, shorter response time, better transmittance and better low-temperature storage stability.

[0056] The compounds of general formula I of the present invention contain dibenzopyran or dibenzothiaran groups. When compounds of general formula I are added to liquid crystal compositions, they are more advantageous in maintaining appropriate clearing points and appropriate optical anisotropy, while having a larger absolute value of dielectric anisotropy, a larger elastic constant, better transmittance, faster low-temperature response time and longer low-temperature storage time.

[0057] The present invention also surprisingly discovered that, in compounds of general formula I, when Z is an alkene group, compared with the technical solution where Z represents a straight-chain alkyl group, compounds of general formula I exhibit a stronger overall conjugation effect. After the synergistic effect of the groups within the molecule, there is a significant improvement in the absolute value of dielectric anisotropy, elastic constant, transmittance, low-temperature response time, and low-temperature storage time. This is more conducive to achieving the effects of high contrast, fast low-temperature response, high transmittance, and good low-temperature storage stability of the present invention.

[0058] In some embodiments of the present invention, the ring and ring Each represents independently

[0059]

[0060] In some embodiments of the present invention, X1 represents -O-, -S-, or -CO-; preferably X1 represents -O- or -S-.

[0061] In some embodiments of the present invention, Y1 and Y2 each independently represent -H, -F, -Cl, -CH3, -OCH3, -CF3 or -OCF3; more preferably, Y1 and Y2 each independently represent -H, -F or -Cl; even more preferably, Y1 and Y2 both represent -F.

[0062] In this invention, Y1 and Y2 are preferably represented independently as -F, which is more beneficial than other substituents in improving the absolute value of dielectric anisotropy, low-temperature response speed, transmittance and low-temperature storage time of the liquid crystal composition.

[0063] In some embodiments of the present invention, X1 represents -O-, -S-, or -CO-, and Y1 and Y2 both represent -F.

[0064] In some embodiments of the present invention, a represents an integer from 0 to 3; more preferably, a represents 1 or 2.

[0065] In some embodiments of the present invention, Z1 and Z2 each independently represent a single bond, -O-, -S-, -CH2O-, -OCH2-, -CH=CH-, -C≡C-, -CH2CH2-, -CF2O-, or -OCF2-.

[0066] In some embodiments of the present invention, n1 and n2 each independently represent 0 or 1; more preferably, n1 represents 0 and n2 represents 0 or 1; even more preferably, n1 and n2 each independently represent 0.

[0067] In some embodiments of the present invention, in order to obtain a large absolute value of dielectric anisotropy, a large elastic constant, better transmittance, faster low-temperature response speed and longer low-temperature storage time while maintaining an appropriate clearing point and appropriate optical anisotropy, the liquid crystal composition comprises at least two compounds of general formula I.

[0068] In some embodiments of the present invention, the liquid crystal composition comprises at least one compound of general formula I with X1 being -O- and / or one compound of general formula I with X1 being -S-; more preferably, the liquid crystal composition comprises at least two compounds of general formula I with X1 being -O-.

[0069] The present invention preferably combines at least two compounds of general formula I with X1 being -O- to further improve the absolute value of dielectric anisotropy of the liquid crystal composition, low-temperature response speed, transmittance and low-temperature storage time.

[0070] In some embodiments of the present invention, X1 is -O-.

[0071] In some embodiments of the present invention, X1 is -S-.

[0072] In some embodiments of the present invention, R1 is preferably a straight-chain or branched alkyl group containing 1-10 carbon atoms, a straight-chain or branched alkoxy group containing 1-9 carbon atoms, a straight-chain or branched alkathio group containing 1-9 carbon atoms, or a straight-chain or branched alkenyl group containing 2-10 carbon atoms; R1 is further preferably a straight-chain or branched alkyl group containing 1-8 carbon atoms, a straight-chain or branched alkoxy group containing 1-7 carbon atoms, a straight-chain or branched alkathio group containing 1-7 carbon atoms, or a straight-chain or branched alkenyl group containing 2-8 carbon atoms; R1 is even further preferably a straight-chain or branched alkyl group containing 1-5 carbon atoms, a straight-chain or branched alkoxy group containing 1-4 carbon atoms, a straight-chain or branched alkathio group containing 1-4 carbon atoms, or a straight-chain or branched alkenyl group containing 2-5 carbon atoms.

[0073] In some embodiments of the present invention, R x It represents -H, a straight-chain or branched fluorinated or unfluorinated alkyl or alkoxy group containing 1-6 carbon atoms.

[0074] In some embodiments of the present invention, the compound of general formula I accounts for 0.1%-40% by weight of the liquid crystal composition.

[0075] 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 25% by weight of the liquid crystal composition.

[0076] In some embodiments of the present invention, the ring and ring Each represents independently

[0077]

[0078] In some embodiments of the present invention, the compound of general formula I is selected from any one or at least a combination of two of the following compounds:

[0079]

[0080]

[0081]

[0082] as well as

[0083]

[0084] Wherein, R1 represents -H, halogen, or a straight-chain or branched alkyl group containing 1-12 carbon atoms. The alkyl groups containing 1-12 carbon atoms, whether straight-chain or branched, One or more non-adjacent -CH2- groups may be independently replaced by -CH=CH-, -C≡C-, -O-, -S-, -CO-, -CO-O-, or -O-CO-, and one or at least two -H groups may be independently replaced by -F or -Cl.

[0085] R x The term represents -H, a straight-chain or branched alkyl group containing 1-12 carbon atoms, wherein one or more non-adjacent -CH2- groups can be independently replaced by -CH=CH-, -C≡C-, -O-, -S-, -CO-, -CO-O-, or -O-CO-, and one or at least two -H groups can be independently replaced by -F or -Cl.

[0086] X1 represents -O-, -S-, -CO-, -CF2-, -NH-, or -NF-;

[0087] Z represents -(CH2) a O- or -(CH2) a S-, where a represents an integer from 0 to 7, such as 1, 2, 3, 4, 5, etc.

[0088] In some embodiments of the present invention, R1 represents a straight-chain or branched alkyl or alkoxy group containing 1-12 carbon atoms. The alkyl groups containing 1-12 carbon atoms, whether straight-chain or branched, One or more non-adjacent -CH2- groups may be independently replaced by -CH=CH-, -C≡C-, -O-, -S-, -CO-, -CO-O-, or -O-CO-, and one or more -H groups may be independently replaced by -F or -Cl; one or more non-adjacent -CH2- groups in the straight-chain or branched alkoxy group containing 1-12 carbon atoms may be independently replaced by -CH=CH-, -C≡C-, -O-, -S-, -CO-, -CO-O-, or -O-CO-, and one or more -H groups may be independently replaced by -F, -Cl, replace,

[0089] In some embodiments of the present invention, R x The term refers to a straight-chain or branched alkyl group containing 1-12 carbon atoms, wherein one or more non-adjacent -CH2- groups may be independently replaced by -CH=CH-, -C≡C-, -O-, -S-, -CO-, -CO-O-, or -O-CO-, and one or at least two -H groups may be independently replaced by -F or -Cl.

[0090] In some embodiments of the present invention, X1 represents -O- or -S-.

[0091] In some embodiments of the present invention, Z represents a single bond, -O-, -CH2O-, or -CH2S-.

[0092] In some embodiments of the present invention, it is preferable to adjust the content of the compound of general formula I such that the liquid crystal composition containing it has a large absolute value of dielectric anisotropy, a large elastic constant, better transmittance, faster low-temperature response speed and longer low-temperature storage time while maintaining an appropriate clearing point and appropriate optical anisotropy.

[0093] In some embodiments of the invention, the compound of general formula I comprises at least one (e.g., two, three, four, or five) selected from general formula I-1, general formula I-3, general formula I-4, general formula I-6, general formula I-9, general formula I-10, general formula I-11, general formula I-14, general formula I-15, general formula I-23, general formula I-24, general formula I-25, general formula I-26, general formula I-27, and general formula I-28, in a weight percentage of 0.1% to 30% (inclusive of any value or subrange within this range) of the liquid crystal composition. Compounds of the group consisting of compounds of formula I-32, formula I-33, formula I-34, formula I-35 and / or formula I-36, preferably comprising 0.1% to 25% 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%, or any two of these values.

[0094] 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.

[0095] In some embodiments of the present invention, compounds of general formula F are selected from the group consisting of:

[0096]

[0097]

[0098]

[0099]

[0100] as well as

[0101]

[0102] 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.

[0103] 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-;

[0104] R F2 ' represents a straight-chain or branched alkoxy group containing 1-11 (e.g., 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 or 11) carbon atoms, wherein one or more of the -CH2- groups in the straight-chain or branched alkoxy group containing 1-11 carbon atoms can be independently replaced by -C≡C-, -O-, -S-, -CO-, -CO-O- or -O-CO-;

[0105] R F2 "" indicates 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, wherein one or more non-adjacent -CH2- in the straight-chain or branched alkyl group containing 1-11 carbon atoms can be independently replaced by -C≡C-, -O-, -S-, -CO-, -CO-O- or -O-CO-;

[0106] X F1 and X F2Each can be represented independently as -CH2- or -O-;

[0107] n F3 Representing integers from 1 to 5; and

[0108] R F3 This 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, 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.

[0109] 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.

[0110] In some embodiments of the present invention, the compound of general formula F comprises at least one (e.g., two, 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, 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.

[0111] In some embodiments of the present invention, the compound of general formula F comprises 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.

[0112] In some embodiments of the present invention, the compound of general formula F comprises at least one (e.g., two, three) 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.

[0113] In some embodiments of the present invention, 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.

[0114] In some embodiments of the present invention, compounds selected from 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, and general formula F-47 are used. The compounds of general formula F-48 and general formula F-49 constitute the group of compounds of general formula F-48. The compounds of general formula F 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.

[0115] In some embodiments of the invention, the compound of general formula F, comprising at least one (e.g., two, three) of 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% 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.

[0116] In some embodiments of the invention, 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-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, 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.

[0117] In some embodiments of the present invention, the compound of general formula F comprises at least one (e.g., two, 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, in a weight percentage of 0%-30% of the liquid crystal composition, such as 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 any two of these values; and / or At least one (e.g., two, three) constitutes 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, and is selected from 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, the content of the compound of general formula F is preferably adjusted so that the liquid crystal composition containing it has a large elastic constant, a high contrast ratio, a large negative dielectric anisotropy and a fast response speed, which will further improve these properties when used in combination with the compound of general formula I.

[0119] In some embodiments of the present invention, the compounds of general formula M are selected from the group consisting of the following compounds:

[0120]

[0121]

[0122]

[0123] in,

[0124] 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. In this context, 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-.

[0125] 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.

[0126] 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.

[0127] 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.

[0128] 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.

[0129] In some embodiments of the present invention, 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.

[0130] 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-.

[0131] 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.

[0132] In some embodiments of the present invention, compounds of general formula N are selected from the group consisting of the following compounds:

[0133]

[0134]

[0135]

[0136] Among them, R N1 and R N2 Each can independently represent a straight-chain alkyl or alkoxy group containing 1-12 carbon atoms, or a branched alkyl group containing 3-12 carbon atoms. In this context, 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-.

[0137] In some embodiments of the present invention, in order to obtain a larger elastic constant, higher penetration rate, and lower rotational viscosity, the compound of general formula N comprises at least one (e.g., two, three, four, or five) compounds selected from 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, and general formula N... Compounds of the group consisting of compounds of formula N-21, N-23, N-24, N-25, N-26, N-27, N-28, N-29, N-30, N-38, N-39, N-40, N-41, N-42, and N-43.

[0138] 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.

[0139] In some embodiments of the present invention, R is defined as follows: N1 This refers to straight-chain alkyl or alkoxy groups containing 1-12 carbon atoms, branched alkyl groups containing 3-12 carbon atoms, and straight-chain or branched alkenyl groups containing 2-5 carbon atoms. This allows the liquid crystal composition containing it to have a large elastic constant, high transmittance, and low rotational viscosity.

[0140] In some embodiments of the present invention, the compound of general formula N accounts for 0.1% to 80% (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%, 36%, 37%. The percentages are 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%, 71%, 72%, 73%, 74%, 75%, 76%, 77%, 78%, 79%, 80%, or a range between any two of these values. Preferably, the compound of general formula N accounts for 0.1% to 75% of the weight percentage of the liquid crystal composition.

[0141] In some embodiments of the present 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 N-1, general formula N-2, general formula N-5, general formula N-6, general formula N-7, general formula N-13, and general formula N-41, wherein the compound comprises 0.1% to 45% (inclusive of any value or subrange within this range) of the liquid crystal composition, for example, 0.1%, 0.3%, 0.5%, or 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.

[0142] In some embodiments of the present 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 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-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, general formula N-40, general formula N-42, and / or general formula N-43, wherein the liquid crystal composition comprises, by weight, a compound of 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-27, general formula N-28, general formula N-29, general formula N-30, general formula N-32, general formula N-32, and / or general formula N-43. The percentage is 0.1% to 45% (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%, or a range between any two of these values.

[0143] 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%. The composition of a 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, wherein at least one (e.g., two, three, four, or five) constitutes 0.1% to 45% by weight of the liquid crystal composition. The range of these values ​​is 27%, 28%, 29%, 30%, 31%, 32%, 33%, 34%, 35%, 36%, 37%, 38%, 39%, 40%, 41%, 42%, 43%, 44%, 45%, or any two of these values. (Including any values ​​or subranges 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%, 4 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, and general formula N-41, or at least one (e.g., two, three, four, or five) constitute 0.1% to 45% (inclusive of any value or subrange within this range) 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%, or a range between any two of these values. Compounds selected from the group consisting of compounds of general formula N-15, N-16, N-17, N-21, N-23, N-24, N-27, N-28, N-29, N-30, N-32, N-38, N-39, N-40, N-42, and / or N-43.

[0144] 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.

[0145] 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 (Short straight lines on both sides).

[0146] In this invention, the halogen includes halogen elements such as fluorine, chlorine, bromine, or iodine; the same descriptions used below have the same meaning.

[0147] 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.).

[0148] 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.

[0149] 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.

[0150] In a preferred embodiment, the liquid crystal composition further includes at least one additive.

[0151] In a preferred embodiment, the additive includes any one or a combination of at least two of the following: dopants, antioxidants, ultraviolet absorbers, infrared absorbers, and light stabilizers.

[0152] The following shows possible dopants that are preferably added to the liquid crystal composition of the present invention:

[0153]

[0154] as well as

[0155]

[0156] In this context, * indicates a chiral site.

[0157] In some embodiments of the present invention, the weight percentage of the dopant in the liquid crystal composition is 0%-5%; preferably, the weight percentage of the dopant in the liquid crystal composition is 0.01%-1%.

[0158] Furthermore, the antioxidants, light stabilizers, and other additives used in the liquid crystal composition of the present invention are preferably the following substances:

[0159]

[0160]

[0161]

[0162] Where n represents a positive integer from 1 to 12; n² represents a positive integer from 1 to 18; and “+” represents a free radical.

[0163] 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%.

[0164] In a second aspect, the present invention provides a liquid crystal display device comprising the aforementioned liquid crystal composition.

[0165] Thirdly, the present invention provides an application of the aforementioned liquid crystal composition in a liquid crystal display device, wherein the aforementioned liquid crystal composition is particularly suitable for fast-response display modes such as VA, PSVA, IPS, and NFFS.

[0166] Compared with the prior art, the present invention has the following beneficial effects:

[0167] 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 faster room temperature response speed and low temperature response speed, lower flicker, higher contrast, and wider temperature operating range. This helps to improve the display effect of liquid crystal materials and is suitable for fast-response display modes such as VA, PSVA, IPS, and NFFS. Detailed Implementation

[0168] 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.

[0169] 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:

[0170] Table 1. Group structure codes of liquid crystal compounds

[0171]

[0172]

[0173]

[0174] Take the following compound with the following structural formula as an example:

[0175]

[0176] 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.

[0177] The abbreviated codes for the test items in the following examples are as follows:

[0178] Cp (Clearing point, nematic-isotropic phase transition temperature, °C)

[0179] Δn Optical anisotropy (589nm, 25℃)

[0180] Δε dielectric anisotropy (1kHz, 25℃)

[0181] LTS (-40℃) Low-temperature storage stability (stored at -40℃ and observed for more than 240 hours, h)

[0182] K 11 Elastic constant of the stretching curve (25℃)

[0183] K 33 Bending elastic constant (25℃)

[0184] Flicker (dB) - Flicker value (logarithmic value)

[0185] γ1 Rotational viscosity (25℃)

[0186] RT(25℃) Response time at 25℃ (ms)

[0187] RT (-30℃) -30℃ response time (ms)

[0188] Tr penetration rate (%)

[0189] CR contrast ratio (bright-state transmittance / dark-state transmittance)

[0190] in,

[0191] Cp: ​​Measured using an MP70 melting point apparatus.

[0192] Δn: Measured using an Abbe refractometer under a sodium lamp (589nm) light source at 25℃.

[0193] 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 5.8μm.

[0194] K 11 and K 33 The 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 5.8μm, V = 0.1~20V.

[0195] Flicker value: Tested using a DMS505 tester in Flicker mode, and the logarithm of the test value is obtained. The larger the absolute value of the Flicker (dB) value, the less flicker there is and the better the display effect. Test conditions: 20℃, 40HZ, 127 grayscale voltage drive, negative FFS type test box with a box thickness of 3μm.

[0196] LTS (-40℃): The time recorded when crystal precipitation is observed after placing the nematic liquid crystal medium in a 7µm antiparallel cell and storing it at a constant temperature of -40℃.

[0197] Tr%: The VT curve of the dimming device was tested using a DMS 505 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 5.8μm.

[0198] RT (25℃): Response time at room temperature, obtained by testing at 25℃ using a DMS505 tester. Test conditions: 25℃, V100 drive, negative FFS test box with a thickness of 3.0μm.

[0199] RT (-30℃): Low temperature response time, obtained by testing at -30℃ using a DMS505 tester. Test conditions: 25℃, V100 drive, negative FFS type test box with a box thickness of 3.0μm.

[0200] 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.

[0201] 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.

[0202] Example 1

[0203] 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.

[0204] Table 2. Formulation and performance parameter test results of liquid crystal compositions

[0205]

[0206] Example 2

[0207] 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.

[0208] Table 3. Formulation and performance parameter test results of liquid crystal compositions

[0209]

[0210]

[0211] Example 3

[0212] 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.

[0213] Table 4. Formulation and performance parameter test results of liquid crystal compositions

[0214]

[0215] Example 4

[0216] 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.

[0217] Table 5. Formulation and performance parameter test results of the liquid crystal composition.

[0218]

[0219] Example 5

[0220] 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.

[0221] Table 6. Formulation and performance parameter test results of liquid crystal compositions

[0222]

[0223] Example 6

[0224] 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.

[0225] Table 7. Formulation and performance parameter test results of the liquid crystal composition.

[0226]

[0227] Example 7

[0228] 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.

[0229] Table 8. Formulation and performance parameter test results of the liquid crystal composition.

[0230]

[0231]

[0232] Example 8

[0233] 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.

[0234] Table 9. Formulation and Performance Parameter Test Results of Liquid Crystal Compositions

[0235]

[0236] Comparative Example 1

[0237] The liquid crystal composition of Comparative Example 1 was prepared according to the compounds listed in Table 10 and their weight percentages in the liquid crystal composition, and was filled between the two substrates of the liquid crystal display for performance testing.

[0238] Table 10. Formulation and performance parameter test results of liquid crystal compositions

[0239]

[0240]

[0241] As can be seen from the comparison of the embodiments and comparative examples of this application, by optimizing the structure and content of the compounds of general formula I and general formula F, the liquid crystal composition of the present invention has a large elastic constant, high transmittance, low rotational viscosity, fast low temperature response speed, and good low temperature storage stability while maintaining appropriate dielectric anisotropy, good optical anisotropy, and good clearing point; thus, the liquid crystal display device containing it has a fast response speed and a large contrast ratio.

[0242] 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 room temperature and low temperature response speeds, lower flicker, higher contrast, and a wider operating temperature range, thus improving the display effect of liquid crystal materials. It is particularly suitable for fast-response display modes such as VA, IPS, and NFFS.

[0243] 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 F: At least one compound of general formula M: At least one compound of the general formula N: in, R1 represents -H, halogen, straight-chain or branched alkyl or alkoxy groups containing 1-12 carbon atoms. The alkyl groups containing 1-12 carbon atoms, whether straight-chain or branched, One or more non-adjacent -CH2- groups can be independently replaced by -CH=CH-, -C≡C-, -O-, -S-, -CO-, -CO-O-, or -O-CO-, and the alkyl group containing 1-12 carbon atoms is a straight-chain or branched alkyl group. One or at least two -H atoms in the alkoxy group can be independently replaced by -F or -Cl; one or more non-adjacent -CH2- atoms in the straight-chain or branched alkoxy group containing 1-12 carbon atoms can be independently replaced by -CH=CH-, -C≡C-, -O-, -S-, -CO-, -CO-O-, or -O-CO-, and one or at least two -H atoms in the straight-chain or branched alkoxy group containing 1-12 carbon atoms can be independently replaced by -F, -Cl, replace, R x The term represents -H, a straight-chain or branched alkyl or alkoxy group containing 1-12 carbon atoms, wherein one or more non-adjacent -CH2- groups can be independently replaced by -CH=CH-, -C≡C-, -O-, -S-, -CO-, -CO-O-, or -O-CO-, and one or at least two -H groups can be independently replaced by -F or -Cl. x With ring Any carbon atom in the middle is connected; 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 of the -CH2- bonds can be replaced by -O- bonds, and one or more single bonds in the ring can be replaced by double bonds, wherein, One or more of the -H can be replaced by -F, -Cl, -CN, -CH3 or -OCH3, and one or more of the -CH= in the ring can be replaced by -N=; ring express Among them, ring express At that time, R x H represents the ring. express At this time, one or more H atoms on the benzene ring can be replaced by fluorine; X1 represents -O-, -S-, -CO-, -CF2-, -NH-, or -NF-; Y1 and Y2 each independently represent -H, halogen, alkyl halogroup or alkyl halogroup or alkoxy ...; Z represents a single bond, -(CH2) a O- or -(CH2) a S-, wherein a represents an integer from 0 to 7; Z1 and Z2 independently represent single bonds, -O-, -S-, -CO-O-, -O-CO-, -CH2O-, -OCH2-, -CH=CH-, -C≡C-, -CH2CH2-, -CF2CF2-, -(CH2)4-, -CF2O-, or -OCF2-; 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=; 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-; n1, n2, and n3 each independently represent 0, 1, or 2. When n1 = 2, the ring... Whether they are the same or different, Z1 is the same or different, when n2 = 2, the ring Same or different, Z2 same or different, when n3 = 2, ring Same or different; 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 They can be the same or different, where when n F2 When 2 is represented, the ring They can be the same or different, Z F2 They can be the 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-, -CH2O-, -OCH2-, -CH=CH-, -C≡C-, -CH2CH2-, -CF2CF2-, -(CH2)4-, -CF2O-, or -OCF2-; n B1 n represents 0, 1, 2, or 3. B2 Represents 0 or 1, and 0 ≤ n B1 +n B2 ≤3; 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 2 is represented, the ring They can be the same or different, Z M2 They can be the 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=.

2. The liquid crystal composition according to claim 1, characterized in that, X1 represents -O-, -S-, or -CO-; preferably X1 represents -O- or -S-. Y1 and Y2 each independently represent -H, -F, -Cl, -CH3, -OCH3, -CF3 or -OCF3; preferably, Y1 and Y2 each independently represent -H, -F or -Cl; preferably, both Y1 and Y2 represent -F; Preferably, X1 represents -O-, -S-, or -CO-, and Y1 and Y2 both represent -F.

3. The liquid crystal composition according to claim 1 or 2, characterized in that, The compound of general formula I accounts for 0.1%-40% of the weight percentage of the liquid crystal composition.

4. The liquid crystal composition according to any one of the preceding claims, characterized in that, The compounds of general formula I are selected from any one or at least two combinations of the following compounds: in, R1 represents -H, halogen, or a straight-chain or branched alkyl or alkoxy group containing 1-12 carbon atoms. The alkyl groups containing 1-12 carbon atoms, whether straight-chain or branched, One or more non-adjacent -CH2- groups may be independently replaced by -CH=CH-, -C≡C-, -O-, -S-, -CO-, -CO-O-, or -O-CO-, and one or more -H groups may be independently replaced by -F or -Cl; one or more non-adjacent -CH2- groups in the straight-chain or branched alkoxy group containing 1-12 carbon atoms may be independently replaced by -CH=CH-, -C≡C-, -O-, -S-, -CO-, -CO-O-, or -O-CO-, and one or more -H groups may be independently replaced by -F, -Cl, replace; R x The term represents -H, a straight-chain or branched alkyl group containing 1-12 carbon atoms, wherein one or more non-adjacent -CH2- groups can be independently replaced by -CH=CH-, -C≡C-, -O-, -S-, -CO-, -CO-O-, or -O-CO-, and one or at least two -H groups can be independently replaced by -F or -Cl. Z represents -(CH2) a O- or -(CH2) a S-, where a represents an integer from 0 to 7.

5. The liquid crystal composition according to any one of claims 1-4, characterized in that, The compound of general formula I comprises 0.1%-30% by weight of the liquid crystal composition; preferably, the compound of general formula I comprises at least one compound selected from general formula I-1, general formula I-3, general formula I-4, general formula I-6, general formula I-9, general formula I-10, general formula I-11, general formula I-14, general formula I-15, general formula I-23, general formula I-24, general formula I-25, general formula I-26, general formula I-27, general formula I-32, general formula I-33, general formula I-34, general formula I-35, and general formula I-35 by weight of the liquid crystal composition. The compounds selected from the group consisting of compounds of general formula I-1, general formula I-3, general formula I-4, general formula I-6, general formula I-9, general formula I-10, general formula I-11, general formula I-14, general formula I-15, general formula I-23, general formula I-24, general formula I-25, general formula I-26, general formula I-27, general formula I-32, general formula I-33, general formula I-34, general formula I-35 and / or general formula I-36 constitute 0.1%-25% by weight of the liquid crystal composition.

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 of the straight-chain or branched alkyl groups containing 1-10 carbon atoms, or two or more of the -CH2- groups, can be independently replaced by -C≡C-, -O-, -S-, -CO-, -CO-O-, or -O-CO-, and the straight-chain or branched alkyl groups containing 1-10 carbon atoms... One or more -H in the alkyl 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 alkyl group containing 1-10 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 ' represents a straight-chain or branched alkoxy group containing 1-11 carbon atoms, wherein one or more non-adjacent -CH2- in the straight-chain or branched alkoxy group containing 1-11 carbon atoms can be independently replaced by -C≡C-, -O-, -S-, -CO-, -CO-O- or -O-CO-. R F2 "" indicates a straight-chain or branched alkyl group containing 1-10 carbon atoms, wherein one or more non-adjacent -CH2- of the straight-chain or branched alkyl group containing 1-11 carbon atoms can be independently replaced by -C≡C-, -O-, -S-, -CO-, -CO-O- or -O-CO-. 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 any one of the preceding claims, characterized in that, The compound of general formula F accounts for 0.1%-35% of the liquid crystal composition by weight. Optionally, the compound of general formula F accounts for 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.

8. The liquid crystal composition according to any one of the preceding claims, 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. Preferably, 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. Preferably, 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. Preferably, the compound 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, wherein the compound of general formula F accounts for 1%-30% by weight of the liquid crystal composition; Preferably, 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%-30% by weight of the liquid crystal composition. Preferably, the compound of general formula F, comprising at least one compound selected from the group consisting of a compound of general formula F-32, a compound of general formula F-33, a compound of general formula F-37, a compound of general formula F-39, a compound of general formula F-40, a compound of general formula F-46, and a compound of general formula F-49, accounts for 1%-30% by weight of the liquid crystal composition. Preferably, 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, 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. In this context, 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-.

10. The liquid crystal composition according to claim 1, characterized in that, Compounds of general formula N are selected from the group consisting of the following compounds: N-43， Among them, R N1 and R N2 Each can independently represent a straight-chain alkyl or alkoxy group containing 1-12 carbon atoms, or a branched alkyl group containing 3-12 carbon atoms. In this context, 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-.

11. The liquid crystal composition according to any one of the preceding claims, characterized in that, 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, general formula N-40, general formula N-41, general formula N-42, and general formula N-43. Preferably, the compound of general formula N accounts for 0.1%-80% of the weight percentage of the liquid crystal composition. Preferably, the compound of general formula N accounts for 0.1%-75% of the weight percentage of the liquid crystal composition; Preferably, the liquid crystal composition comprises at least one compound selected from the group consisting of a compound of general formula N-1, a compound of general formula N-2, a compound of general formula N-5, a compound of general formula N-6, a compound of general formula N-7, a compound of general formula N-13, and a compound of general formula N-41, wherein the compound comprises 0.1% to 45% by weight of the liquid crystal composition. Preferably, the liquid crystal composition comprises at least one compound selected from the group consisting of compounds of 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-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, general formula N-40, general formula N-42 and / or general formula N-43, wherein the compound comprises 0.1%-45% by weight 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, and general formula N-7, accounting for 0%-45% by weight of the liquid crystal composition; 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, and general formula N-41, accounting for 0.1%-45% by weight of the liquid crystal composition; and / or, up to The liquid crystal composition contains at least one compound selected from the group consisting of compounds of 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-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, general formula N-40, general formula N-42 and / or general formula N-43, comprising 0.1% to 45% by weight of the liquid crystal composition.

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, IPS, and NFFS liquid crystal display modes.

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