Liquid crystal composition and display panel

Abstract

The embodiment of the present application discloses a liquid crystal composition and a display panel, the liquid crystal composition comprises a first compound represented by a general formula (I), a second compound represented by a general formula (II), a third compound represented by a general formula (III) and a fourth compound represented by a general formula (IV). The liquid crystal composition provided by the embodiment of the present application uses the combination of the compounds represented by the aforementioned general formula (I) to general formula (IV), when the liquid crystal composition is applied to a display device as a liquid crystal material, the response speed and the transmittance of the display device can be improved, and the driving voltage of the display device can be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of liquid crystal materials, and particularly relates to a liquid crystal composition and a display panel. BACKGROUND

[0002] Liquid crystal materials are widely used in various display devices, including but not limited to mobile phones, televisions and computers, etc. Liquid crystal materials play a role of "light valve" in TFT-LCD (Thin Film Transistor Liquid Crystal Display), which realizes the brightness adjustment of TFT-LCD by controlling the transmittance of backlight. In order to make TFT-LCD present better display effect and have lower power consumption, the performance of liquid crystal materials in TFT-LCD, such as response time, driving voltage and transmittance, needs to be improved. SUMMARY

[0003] The present application provides a liquid crystal composition and a display panel to improve the response speed, driving voltage and transmittance of the existing liquid crystal materials.

[0004] To solve the above problems, the technical scheme provided by the present application is as follows:

[0005] The present application provides a liquid crystal composition, which comprises:

[0006] a first compound represented by general formula (I);

[0007]

[0008] a second compound represented by general formula (II);

[0009]

[0010] a third compound represented by general formula (III); and

[0011]

[0012] a fourth compound represented by general formula (IV);

[0013]

[0014] wherein, each is independently selected from any one of the following groups which are substituted or unsubstituted:

[0015] and and the substituents of the above groups are each independently selected from F, Cl, Br or I;

[0016] Z1and Z2are each independently selected from a single bond, -0-, -S-, -S02-, -CO-, -C(0)0-, -OC(O)-, -OC(0)0-, or -CºC-; or, Z1and Z2are each independently selected from any one of the following groups which are substituted or unsubstituted: -CH20-, -OCH2-, -CH2-CH2-, -(CH2)3-, and -CH=CH-, and the substituents of the above groups are each independently selected from F, Cl, Br or I;

[0017] X is selected from O or S;

[0018] n is selected from 0, 1 or 2;

[0019] Y is selected from

[0020] R1to R8are each independently selected from -H, -F, -Cl, -Br, -I, -CN, -SCN, -NCS or -SF; or, R1to R8are each independently selected from an alkyl or alkoxy group having 1-15 carbon atoms which are substituted or unsubstituted, an alkenyl or alkenyloxy group having 2-15 carbon atoms which are substituted or unsubstituted, or an alkynyl or alkynyloxy group having 2-15 carbon atoms which are substituted or unsubstituted, and the substituents of the above groups are each independently selected from F, Cl, Br or I.

[0021] Optionally, in some embodiments of the present application, the terminal groups of R1to R8are each independently selected from -H, -CN or -CF3; and / or

[0022] The methylene groups of at least one of R1to R8are each independently selected from -0-, -S-, -S02-, -CO-, -C(0)0-, -OC(O)-, -OC(0)0-, -CºC-; or, the methylene groups of at least one of R1to R8are each independently selected from the following groups which are substituted or unsubstituted: -CH20-, -OCH2-, -CH2-CH2-, -(CH2)3-, or -CH=CH-, and the substituents of the above groups are each independently selected from F, Cl, Br or I.

[0023] Optionally, the methylene groups of at least one of R1to R8are each independently selected from the following groups which are substituted or unsubstituted: -CH20-, -OCH2-, -CH2-CH2-, -(CH2)3-, or -CH=CH-, and the substituents of the above groups are each independently selected from F.

[0024] Optionally, in some embodiments of the present application, the first compound is represented by any one of the general formula (I-1) to the general formula (I-48):

[0025]

[0026]

[0027] Optionally, in some embodiments of the present application, the second compound is represented by any one of Formula (II-1) to Formula (II-15):

[0028]

[0029] Optionally, in some embodiments of the present application, the third compound is represented by any one of Formula (III-1) to Formula (III-6):

[0030]

[0031] Optionally, in some embodiments of the present application, the fourth compound is represented by any one of Formula (IV-1), (IV-2), and Formula (IV-3):

[0032]

[0033]

[0034] Optionally, in some embodiments of the present application, the fourth compound is represented by any one of Formula (IV-1-1) to Formula (IV-3-12):

[0035]

[0036]

[0037] Optionally, in some embodiments of the present application, the liquid crystal composition comprises, based on the total weight of the liquid crystal composition:

[0038] 1% to 35% by mass of the first compound;

[0039] 1% to 40% by mass of the second compound;

[0040] 1% to 20% by mass of the third compound; and

[0041] 1% to 30% by mass of the fourth compound.

[0042] Optionally, in some embodiments of the present application, the liquid crystal composition comprises, based on the total weight of the liquid crystal composition:

[0043] 5% to 22% by mass of the first compound;

[0044] said second compound in a mass percentage of 10% to 30%;

[0045] said third compound in a mass percentage of 1% to 15%; and

[0046] said fourth compound in a mass percentage of 5% to 25%.

[0047] Optionally, in some embodiments of the present application, the liquid crystal composition further comprises a fifth compound represented by general formula (V):

[0048]

[0049] wherein R9and R 10 each independently is selected from a substituted or unsubstituted alkyl or alkoxy group having 1 to 10 carbon atoms, a substituted or unsubstituted alkenyl or alkenyloxy group having 2 to 10 carbon atoms, or a substituted or unsubstituted alkynyl or alkynyloxy group having 2 to 10 carbon atoms, and the substituents of the above groups are each independently selected from F, Cl, Br, or I.

[0050] Optionally, in some embodiments of the present application, the liquid crystal composition further comprises a sixth compound represented by general formula (VI):

[0051]

[0052] wherein R 11 and R 12 each independently is selected from a substituted or unsubstituted alkyl or alkoxy group having 1 to 10 carbon atoms, a substituted or unsubstituted alkenyl or alkenyloxy group having 2 to 10 carbon atoms, or a substituted or unsubstituted alkynyl or alkynyloxy group having 2 to 10 carbon atoms, and the substituents of the above groups are each independently selected from F, Cl, Br, or I.

[0053] Optionally, in some embodiments of the present application, the liquid crystal composition further comprises a seventh compound represented by general formula (VII):

[0054]

[0055] wherein R 13 and R 14 each independently is selected from a substituted or unsubstituted alkyl or alkoxy group having 1 to 10 carbon atoms, a substituted or unsubstituted alkenyl or alkenyloxy group having 2 to 10 carbon atoms, or a substituted or unsubstituted alkynyl or alkynyloxy group having 2 to 10 carbon atoms, and the substituents of the above groups are each independently selected from F, Cl, Br, or I.

[0056] Optionally, in some embodiments of the present application, the liquid crystal composition further comprises an eighth compound represented by general formula (VIII):

[0057]

[0058] wherein R 15 and R 16 are each independently selected from substituted or unsubstituted alkyl or alkoxy having 1-10 carbon atoms, substituted or unsubstituted alkenyl or alkenyloxy having 2-10 carbon atoms, or substituted or unsubstituted alkynyl or alkynyloxy having 2-10 carbon atoms, and the substituents of the above groups are each independently selected from F, Cl, Br or I.

[0059] Optionally, in some embodiments of the present application, the liquid crystal composition further comprises a ninth compound represented by general formula (IX):

[0060]

[0061] wherein R 17 and R 18 are each independently selected from substituted or unsubstituted alkyl or alkoxy having 1-10 carbon atoms, substituted or unsubstituted alkenyl or alkenyloxy having 2-10 carbon atoms, or substituted or unsubstituted alkynyl or alkynyloxy having 2-10 carbon atoms, and the substituents of the above groups are each independently selected from F, Cl, Br or I.

[0062] The embodiments of the present application also provide a display panel, comprising a first substrate and a second substrate, and a liquid crystal layer sandwiched between the first substrate and the second substrate, wherein the material of the liquid crystal layer comprises the liquid crystal composition according to any one of the preceding embodiments.

[0063] The liquid crystal composition provided by the embodiments of the present application can improve the response speed and transmittance of the display device and reduce the driving voltage of the display device by using the combination of the compounds represented by the preceding general formula (I) to general formula (IV) when the liquid crystal composition is applied to the display device as a liquid crystal material. BRIEF DESCRIPTION OF DRAWINGS

[0064] In order to more clearly illustrate the technical solutions of the embodiments or the prior art, the following will briefly introduce the drawings needed to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0065] Figure 1 The structural schematic diagram of the display panel provided by some embodiments of the present application is shown in the figure. DETAILED DESCRIPTION

[0066] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0067] In the present application, "optionally", "optional" or "optional" means that it can or can not exist, that is, it is selected from any one of the two parallel schemes of "yes" or "no". If there are multiple "optionally" in a technical solution, and there is no contradiction or mutual restriction relationship, and no special description, each "optionally" is independent of each other. In the present application, the technical features described in an open manner include both the closed technical solution consisting of the listed features and the open technical solution containing the listed features.

[0068] The present application provides a liquid crystal composition and a display panel. In order to make the purpose, technical solutions and effects of the present application more clear and explicit, the present application is further described in detail below. It should be understood that the specific embodiments described herein are only used to explain the present application and not to limit the present application.

[0069] In the present application, "substituted" means that the hydrogen atom in the substituent is replaced by the substituent.

[0070] In the present application, "substituted or unsubstituted" means that the defined group can be substituted or unsubstituted. When the defined group is substituted, it is understood that the defined group can be substituted by one or more substituents. In the present application, unless otherwise specified, "substituted or unsubstituted" means that the hydrogen atom is replaced by F, Cl, Br or I.

[0071] Some embodiments of the present application provide a liquid crystal composition, which includes at least one first compound, at least one second compound, at least one third compound and at least one fourth compound.

[0072] The first compound is represented by the following general formula (I):

[0073]

[0074] In the general formula (I), each is independently selected from any one of the following groups which are substituted or unsubstituted:

[0075] and and the substituents of the aforementioned groups are each independently selected from F, Cl, Br or I.

[0076] In General Formula (I), Z1is selected from a single bond, -O-, -S-, -SO2-, -CO-, -C(O)O-, -OC(O)-, -OC(O)O- or -C≡C-; or, Z1is selected from any one of the following groups substituted or unsubstituted: -CH2O-, -OCH2-, -CH2-CH2-, -(CH2)3-, and -CH=CH-, and the substituents of the aforementioned groups are each independently selected from F, Cl, Br or I.

[0077] In General Formula (I), R1and R2are each independently selected from -H, -F, -Cl, -Br, -I, -CN, -SCN, -NCS or -SF; or, R1and R2are each independently selected from an alkyl or alkoxy group having 1 to 15 carbon atoms, substituted or unsubstituted, an alkenyl or alkenyloxy group having 2 to 15 carbon atoms, substituted or unsubstituted, or an alkynyl or alkynyloxy group having 2 to 15 carbon atoms, substituted or unsubstituted, and the substituents of the aforementioned groups are each independently selected from F, Cl, Br or I.

[0078] The second compound is represented by the following General Formula (II):

[0079]

[0080] In General Formula (II), selected from any one of the following groups substituted or unsubstituted:

[0081] and and the substituents of the aforementioned groups are each independently selected from F, Cl, Br or I.

[0082] In General Formula (II), Z2is selected from a single bond, -O-, -S-, -SO2-, -CO-, -C(O)O-, -OC(O)-, -OC(O)O- or -C≡C-; or, Z2is selected from any one of the following groups substituted or unsubstituted: -CH2O-, -OCH2-, -CH2-CH2-, -(CH2)3-, and -CH=CH-, and the substituents of the aforementioned groups are each independently selected from F, Cl, Br or I.

[0083] In general formula (II), R3and R4are each independently selected from -H, -F, -Cl, -Br, -I, -CN, -SCN, -NCS, or -SF; or, R3and R4are each independently selected from substituted or unsubstituted alkyl or alkoxy having 1 to 15 carbon atoms, substituted or unsubstituted alkenyl or alkenyloxy having 2 to 15 carbon atoms, or substituted or unsubstituted alkynyl or alkynyloxy having 2 to 15 carbon atoms, and the substituents of the above groups are each independently selected from F, Cl, Br, or I.

[0084] The third compound is represented by the following general formula (III):

[0085]

[0086] In general formula (III), X is selected from O or S, and n is selected from 0, 1, or 2.

[0087] In general formula (III), R5and R6are each independently selected from -H, -F, -Cl, -Br, -I, -CN, -SCN, -NCS, or -SF; or, R5and R6are each independently selected from substituted or unsubstituted alkyl or alkoxy having 1 to 15 carbon atoms, substituted or unsubstituted alkenyl or alkenyloxy having 2 to 15 carbon atoms, or substituted or unsubstituted alkynyl or alkynyloxy having 2 to 15 carbon atoms, and the substituents of the above groups are each independently selected from F, Cl, Br, or I.

[0088] The fourth compound is represented by the following general formula (IV):

[0089]

[0090] In general formula (IV), Y is selected from

[0091] In general formula (IV), R7and R8are each independently selected from -H, -F, -Cl, -Br, -I, -CN, -SCN, -NCS, or -SF; or, R7and R8are each independently selected from substituted or unsubstituted alkyl or alkoxy having 1 to 15 carbon atoms, substituted or unsubstituted alkenyl or alkenyloxy having 2 to 15 carbon atoms, or substituted or unsubstituted alkynyl or alkynyloxy having 2 to 15 carbon atoms, and the substituents of the above groups are each independently selected from F, Cl, Br, or I.

[0092] The first compound represented by the general formula (I) has adjustable optical anisotropy, a high clearing point, and a high elastic coefficient; the second compound II represented by the general formula (II) has adjustable optical anisotropy, a low clearing point, a low elastic coefficient, and a low viscosity; the third compound III represented by the general formula (III) has high optical anisotropy and a high dielectric coefficient; and the fourth compound represented by the general formula (IV) has adjustable optical anisotropy, a high clearing point, a high elastic coefficient, and a low viscosity.

[0093] Specifically, in the liquid crystal composition of the present application, the third compound has a high dielectric coefficient and high optical anisotropy, so that when the liquid crystal composition is applied to a display device, the driving voltage of the liquid crystal can be reduced, and the response time of the liquid crystal can be reduced to meet the demand for fast response liquid crystal; the dielectric coefficient of the first compound is lower than that of the third compound, and the first compound has adjustable optical anisotropy, so that when the liquid crystal composition is applied to a display device, the driving voltage of the liquid crystal can be reduced, and the transmittance can be improved; the dielectric coefficient of the second compound is lower than that of the third compound, and the second compound has a low viscosity, so that when the liquid crystal composition is applied to a display device, the response time of the liquid crystal can be reduced to improve the response speed of the liquid crystal; and the fourth compound has a high clearing point, adjustable optical anisotropy, and can be used to improve the clearing point of the liquid crystal composition and adjust the optical anisotropy of the liquid crystal composition; in addition, because the fourth compound has a low viscosity and a high elastic coefficient, when the liquid crystal composition is applied to a display device, the response time of the liquid crystal can be reduced to improve the response speed of the liquid crystal.

[0094] Therefore, the liquid crystal composition provided by the embodiments of the present application can adjust the birefringence of the liquid crystal composition by the combination of the first compound, the second compound, the third compound, and the fourth compound, so as to realize the regulation of the optical anisotropy of the liquid crystal composition, so that when the liquid crystal composition is applied to a display device, the transmittance of the display device can be improved. In addition, the above combination makes the liquid crystal composition have a high clearing point, a high dielectric coefficient, a high optical anisotropy, a high elastic coefficient, and a low viscosity, so that when the liquid crystal composition is applied to a display device as a liquid crystal material, the response speed and the transmittance of the display device can be improved, and the driving voltage of the display device can be reduced.

[0095] In some embodiments, the terminal groups of R1-R8 are each independently selected from -H, -CN, or -CF3.

[0096] In some embodiments, the methylene group of at least one of R1to R8is each independently selected from -O-, -S-, -SO2-, -CO-, -C(O)O-, -OC(O)-, -OC(O)O-, or -C≡C-; or, in some embodiments, the methylene group of at least one of R1to R8is each independently selected from the following groups, which are substituted or unsubstituted: -CH2O-, -OCH2-, -CH2-CH2-, -(CH2)3-, -CH=CH-, and the substituents of the above groups are each independently selected from F, Cl, Br, or I.

[0097] In some embodiments, the terminal group of R1to R8is each independently selected from -H, -CN, or -CF3, and the methylene group of at least one of R1to R8is each independently selected from -O-, -S-, -SO2-, -CO-, -C(O)O-, -OC(O)-, -OC(O)O-, or -C≡C-.

[0098] In some embodiments, the terminal group of R1to R8is each independently selected from -H, -CN, or -CF3, and the methylene group of at least one of R1to R8is each independently selected from the following groups, which are substituted or unsubstituted: -CH2O-, -OCH2-, -CH2-CH2-, -(CH2)3-, -CH=CH-, and the substituents of the above groups are each independently selected from F, Cl, Br, or I.

[0099] In some embodiments, when the terminal group of R1to R8is each independently selected from -H, -CN, or -CF3, it means that the terminal group of R1to R8is each independently monosubstituted by -H, -CN, or -CF3.

[0100] In some embodiments, when the methylene group of at least one of R1to R8is substituted by a halogen atom such as F, Cl, Br, or I, the adjacent heteroatoms are not directly bonded.

[0101] In some embodiments, the methylene group of at least one of R1to R8is each independently selected from the following groups, which are substituted or unsubstituted: -CH2O-, -OCH2-, -CH2-CH2-, -(CH2)3-, or -CH=CH-, and the substituents of the above groups are each independently selected from F.

[0102] In some embodiments, in the first compound represented by general formula (I), is each independently selected from any one of the following groups, which are substituted:

[0103] and and substituents of the aforementioned groups are F. In some embodiments, each is independently selected from

[0104] In some embodiments, in the first compound represented by general formula (I), Z1is selected from a single bond, -0-, -S-, -S02-, -CO-, -C(0)0-, -OC(O)-, -OC(0)0-, -CH20-, -OCH2-, -CF20-, -OCF2-, -CF2-CF2-, -CF2-CH2-, -CH2-CF2-, -CHF-CHF-, -CH=CH-, -CF=CH-, -CH=CF-, -CF=CF-, or -C=C-. each is independently selected from

[0105] In some embodiments, in the first compound represented by general formula (I), R1and R2are each independently selected from substituted or unsubstituted alkyl or alkoxy having 1-15 carbon atoms, substituted or unsubstituted alkenyl or alkenyloxy having 2-15 carbon atoms, or substituted or unsubstituted alkynyl or alkynyloxy having 2-15 carbon atoms, and substituents of the aforementioned groups are each independently selected from F. Further, in some embodiments, R1and R2are each independently selected from alkyl or alkoxy having 1-10 carbon atoms, alkenyl or alkenyloxy having 2-10 carbon atoms, or alkynyl or alkynyloxy having 2-10 carbon atoms. Further still, in some embodiments, R1and R2are each independently selected from alkyl or alkoxy having 1-5 carbon atoms, alkenyl or alkenyloxy having 2-5 carbon atoms, or alkynyl or alkynyloxy having 2-5 carbon atoms.

[0106] In some embodiments, in the first compound represented by general formula (I), R1and R2are each independently selected from substituted or unsubstituted alkyl or alkoxy having 1-15 carbon atoms, substituted or unsubstituted alkenyl or alkenyloxy having 2-15 carbon atoms, or substituted or unsubstituted alkynyl or alkynyloxy having 2-15 carbon atoms, and substituents of the aforementioned groups are each independently selected from F. Further, in some embodiments, R1and R2are each independently selected from alkyl or alkoxy having 1-10 carbon atoms, alkenyl or alkenyloxy having 2-10 carbon atoms, or alkynyl or alkynyloxy having 2-10 carbon atoms. Further still, in some embodiments, R1and R2are each independently selected from alkyl or alkoxy having 1-5 carbon atoms, alkenyl or alkenyloxy having 2-5 carbon atoms, or alkynyl or alkynyloxy having 2-5 carbon atoms.

[0107] In some embodiments, R1and R2are each independently selected from methyl, ethyl, propyl, butyl, pentyl, ethenyl, prop-1-enyl, prop-2-enyl, but-1-enyl, but-2-enyl, but-3-enyl, pent-1-enyl, pent-2-enyl, pent-3-enyl, pent-4-enyl, ethynyl, prop-1-ynyl, prop-2-ynyl, but-1-ynyl, but-2-ynyl, but-3-ynyl, pent-1-ynyl, pent-2-ynyl, pent-3-ynyl, or pent-4-ynyl. Further, in some embodiments, R1and R2are each independently selected from methyl, ethyl, or propyl.

[0108] In some embodiments, the first compound is represented by any one of Formula (I-1) to Formula (I-48):

[0109]

[0110]

[0111]

[0112] In some embodiments, in the second compound represented by Formula (II), is selected from any one of the following groups, which are substituted: and the substituents of the above groups are F. Further, in some embodiments, is selected from any one of the following groups: Still further, in some embodiments, is selected from

[0113] In some embodiments, in the second compound represented by Formula (II), Z2is selected from a single bond, -O-, -S-, -SO2-, -CO-, -C(O)O-, -OC(O)-, -OC(O)O-, -CH2O-, -OCH2-, -CF2O-, -OCF2-, -CF2-CF2-, -CF2-CH2-, -CH2-CF2-, -CHF-CHF-, -CH=CH-, -CF=CH-, -CH=CF-, -CF=CF-, or -CºC-. Further, in some embodiments, Z2is selected from a single bond, -CH2O-, -OCH2-, -CF2O-, -OCF2-, -CF2-CF2-, -CF2-CH2-, -CH2-CF2-, or -CHF-CHF-. Still further, in some embodiments, Z2is selected from a single bond, -CH2O-, or -OCH2-.

[0114] It is to be noted that in the second compound represented by the general formula (II), R3and R4may have the same selection range as R1, and can be selected from the same or different groups as R1, which will not be repeated here.

[0115] In some embodiments, the second compound is represented by any one of the general formula (II-1) to (II-15):

[0116]

[0117] In some embodiments, in the third compound represented by the general formula (III), X is selected from O or S, and n is 1.

[0118] It is to be noted that in the third compound represented by the general formula (III), R5and R6may have the same selection range as R1, and can be selected from the same or different groups as R1, which will not be repeated here.

[0119] In some embodiments, the third compound is represented by any one of the general formula (III-1) to (III-6):

[0120]

[0121] In some embodiments, the fourth compound can be represented by any one of the general formula (IV-1), (IV-2), and (IV-3):

[0122]

[0123] In some embodiments, in the general formula (IV-1), (IV-2), and (IV-3), R7and R8may have the same selection range as R1, and can be selected from the same or different groups as R1, which will not be repeated here.

[0124] In some embodiments, the fourth compound is represented by any one of the general formula (IV-1-1) to (IV-3-12):

[0125]

[0126]

[0127] In some embodiments, the liquid crystal composition comprises, by mass percentage, 1% to 35% of the first compound, 1% to 40% of the second compound, 1% to 20% of the third compound, and 1% to 30% of the fourth compound, based on the total weight of the liquid crystal composition. Within the above ranges of mass percentage, the above compounds have good solubility at low temperatures, and the solubility of the liquid crystal composition can be improved.

[0128] In some embodiments, the liquid crystal composition comprises, by mass percentage, 1% to 25% of the first compound, 5% to 35% of the second compound, 1% to 18% of the third compound, and 1% to 25% of the fourth compound. Further, in some embodiments, the liquid crystal composition comprises, by mass percentage, 5% to 22% of the first compound, 10% to 30% of the second compound, 1% to 15% of the third compound, and 5% to 25% of the fourth compound.

[0129] It should be noted that, in some embodiments of the present application, the liquid crystal composition can comprise one first compound, one second compound, one third compound, and one fourth compound. In some embodiments, the liquid crystal composition can further comprise two or more first compounds, two or more second compounds, two or more third compounds, and / or two or more fourth compounds. When the liquid crystal composition comprises two or more first compounds, the two or more first compounds are selected from different compounds and are all represented by the aforementioned general formula (I); when the liquid crystal composition comprises two or more second compounds, the two or more second compounds are selected from different compounds and are all represented by the aforementioned general formula (II); when the liquid crystal composition comprises two or more third compounds, the two or more third compounds are selected from different compounds and are all represented by the aforementioned general formula (III); and when the liquid crystal composition comprises two or more fourth compounds, the two or more fourth compounds are selected from different compounds and are all represented by the aforementioned general formula (IV).

[0130] Further, in some embodiments of the present application, the liquid crystal composition can further comprise at least one fifth compound represented by general formula (V):

[0131]

[0132] In general formula (V), R9and R 10each independently selected from substituted or unsubstituted alkyl or alkoxy having 1-10 carbon atoms, substituted or unsubstituted alkenyl or alkenyloxy having 2-10 carbon atoms, or substituted or unsubstituted alkynyl or alkynyloxy having 2-10 carbon atoms, and the substituents of the above groups are each independently selected from F, Cl, Br, or I.

[0133] The fifth compound represented by general formula (V) has a lower clearing point, a smaller birefringence, a lower elastic coefficient, and a lower viscosity, thus being able to further adjust the clearing point, optical anisotropy, dielectric coefficient, and elastic coefficient of the liquid crystal composition, and reduce the viscosity of the liquid crystal composition, thereby facilitating the improvement of the response speed of the liquid crystal. In particular, in some embodiments, the fifth compound can be added to the liquid crystal composition as a viscosity diluent to reduce the viscosity of the liquid crystal composition, facilitate the reduction of the response time of the liquid crystal, and improve the response speed thereof.

[0134] In some embodiments, R9and R 10 each independently selected from substituted or unsubstituted alkyl or alkoxy having 1-7 carbon atoms, substituted or unsubstituted alkenyl or alkenyloxy having 2-7 carbon atoms, or substituted or unsubstituted alkynyl or alkynyloxy having 2-7 carbon atoms, and the substituents of the above groups are each independently selected from F. Further, in some embodiments, R9and R 10 each independently selected from substituted or unsubstituted alkyl having 1-5 carbon atoms, substituted or unsubstituted alkenyl having 2-5 carbon atoms, or substituted or unsubstituted alkynyl having 2-5 carbon atoms, and the substituents of the above groups are each independently selected from F.

[0135] In some embodiments, R9and R 10 each independently selected from methyl, ethyl, propyl, butyl, pentyl, ethenyl, prop-1-enyl, prop-2-enyl, but-1-enyl, but-2-enyl, but-3-enyl, pent-1-enyl, pent-2-enyl, pent-3-enyl, pent-4-enyl, ethynyl, prop-1-ynyl, prop-2-ynyl, but-1-ynyl, but-2-ynyl, but-3-ynyl, pent-1-ynyl, pent-2-ynyl, pent-3-ynyl, or pent-4-ynyl. Further, in some embodiments, R9and R 10 each independently selected from methyl, ethyl, propyl, ethenyl, or ethynyl.

[0136] In some embodiments, the fifth compound may constitute 0% to 60% of the total weight of the liquid crystal composition. Within this range, the fifth compound exhibits good solubility at low temperatures, thereby improving the solubility of the liquid crystal composition. Further, in some embodiments, the fifth compound may constitute 5%, 10%, 15%, 20%, 15%, 30%, 35%, 40%, 45%, 50%, 55%, or 60% of the liquid crystal composition.

[0137] In some embodiments of this application, the liquid crystal composition may further include at least one sixth compound represented by general formula (VI):

[0138]

[0139] In general formula (VI), R 11 and R 12 Each of the substituents is independently selected from substituted or unsubstituted alkyl or alkoxy groups having 1-10 carbon atoms, substituted or unsubstituted alkenyl or alkenyloxy groups having 2-10 carbon atoms, or substituted or unsubstituted alkynyl or alkynyloxy groups having 2-10 carbon atoms, and the substituents of the above groups are independently selected from F, Cl, Br, or I.

[0140] The sixth compound represented by general formula (VI) has a lower clearing point, a lower elastic modulus, and a lower viscosity. Therefore, it is possible to further adjust parameters such as the clearing point, optical anisotropy, dielectric constant, and elastic modulus of the liquid crystal composition, and to reduce the viscosity of the liquid crystal composition, thereby improving the response speed of the liquid crystal.

[0141] In some embodiments, R 11 and R 12 It can have the same range of choices as R1, and can be selected from the same or different groups as R1, which will not be elaborated here.

[0142] In some embodiments, the sixth compound may constitute 0% to 30% of the total weight of the liquid crystal composition. Within this range, the sixth compound exhibits good solubility at low temperatures, thereby improving the solubility of the liquid crystal composition. Further, in some embodiments, the sixth compound may constitute 1%, 5%, 10%, 15%, 20%, 15%, or 30% of the liquid crystal composition by mass.

[0143] In some embodiments of this application, the liquid crystal composition may further include at least one seventh compound represented by general formula (VII):

[0144]

[0145] In general formula (VII), R 13 and R 14 are each independently selected from substituted or unsubstituted alkyl or alkoxy having 1-10 carbon atoms, substituted or unsubstituted alkenyl or alkenyloxy having 2-10 carbon atoms, or substituted or unsubstituted alkynyl or alkynyloxy having 2-10 carbon atoms, and the substituents of the above groups are each independently selected from F, Cl, Br or I.

[0146] The seventh compound represented by general formula (VII) has a higher birefringence difference, a lower dielectric coefficient, and can further adjust the clearing point, optical anisotropy, dielectric coefficient, elastic coefficient, and viscosity and other parameters of the liquid crystal composition to meet different performance requirements of the liquid crystal composition.

[0147] In some embodiments, R 13 and R 14 may have the same selection range as R1, and can be selected from the same or different groups as R1, which will not be repeated here.

[0148] In some embodiments, the mass percentage of the seventh compound in the liquid crystal composition can be 0%-15% based on the total weight of the liquid crystal composition. Within the above mass percentage range, the seventh compound has good solubility at low temperature, which can improve the solubility of the liquid crystal composition. Further, in some embodiments, the mass percentage of the seventh compound in the liquid crystal composition can be 1%, 5%, 8%, 10%, 12% or 15%.

[0149] In some embodiments of the present application, the liquid crystal composition can further include at least one eighth compound represented by general formula (VIII):

[0150]

[0151] In general formula (VIII), R 15 and R 16 are each independently selected from substituted or unsubstituted alkyl or alkoxy having 1-10 carbon atoms, substituted or unsubstituted alkenyl or alkenyloxy having 2-10 carbon atoms, or substituted or unsubstituted alkynyl or alkynyloxy having 2-10 carbon atoms, and the substituents of the above groups are each independently selected from F, Cl, Br or I.

[0152] The eighth compound represented by general formula (VIII) has a lower dielectric coefficient, and can further adjust the clearing point, optical anisotropy, dielectric coefficient, elastic coefficient, and viscosity and other parameters of the liquid crystal composition to meet different performance requirements of the liquid crystal composition.

[0153] In some embodiments, R 15 and R 16 may have the same selection range as R1, and can be selected from the same or different groups as R1, which will not be repeated here.

[0154] In some embodiments, the mass percentage of the eighth compound in the liquid crystal composition can be 0% to 15% based on the total weight of the liquid crystal composition. Within the above range of mass percentage, the eighth compound has good solubility at low temperature, and can improve the solubility of the liquid crystal composition. Further, in some embodiments, the mass percentage of the eighth compound in the liquid crystal composition can be 1%, 5%, 8%, 10%, 12% or 15%.

[0155] In some embodiments of the present application, the liquid crystal composition can further comprise at least one ninth compound represented by general formula (IX):

[0156]

[0157] In general formula (IX), R 17 and R 18 are each independently selected from substituted or unsubstituted alkyl or alkoxy having 1-10 carbon atoms, substituted or unsubstituted alkenyl or alkenyloxy having 2-10 carbon atoms, or substituted or unsubstituted alkynyl or alkynyloxy having 2-10 carbon atoms, and the substituents of the above groups are each independently selected from F, Cl, Br or I.

[0158] The ninth compound represented by general formula (IX) has a low dielectric coefficient, and can further adjust the clearing point, optical anisotropy, dielectric coefficient, elastic coefficient and viscosity of the liquid crystal composition, so as to meet different performance requirements of the liquid crystal composition.

[0159] In some embodiments, R 17 and R 18 may have the same selection range as R1, and can be selected from the same or different groups as R1, which will not be repeated here.

[0160] In some embodiments of the present application, the liquid crystal composition can further comprise at least one tenth compound represented by general formula (X):

[0161]

[0162] In general formula (X), R 19 and R 20substituted or unsubstituted alkyl or alkoxy having 1-10 carbon atoms, substituted or unsubstituted alkenyl or alkenyloxy having 2-10 carbon atoms, or substituted or unsubstituted alkynyl or alkynyloxy having 2-10 carbon atoms, and the substituent of the above group is each independently selected from F, Cl, Br or I.

[0163] The tenth compound represented by general formula (X) has a higher elastic constant and a higher dielectric coefficient, and can further adjust the dielectric coefficient, elastic coefficient and other parameters of the liquid crystal composition to meet different performance requirements of the liquid crystal composition.

[0164] In some embodiments, R 19 and R 20 may have the same selection range as R1, and can be selected from the same or different groups as R1, which will not be repeated here.

[0165] In some embodiments of the present application, the liquid crystal composition can further include at least one eleventh compound represented by general formula (XI):

[0166]

[0167] In general formula (XI), R 21 and R 22 are each independently selected from substituted or unsubstituted alkyl or alkoxy having 1-10 carbon atoms, substituted or unsubstituted alkenyl or alkenyloxy having 2-10 carbon atoms, or substituted or unsubstituted alkynyl or alkynyloxy having 2-10 carbon atoms, and the substituent of the above group is each independently selected from F, Cl, Br or I.

[0168] The eleventh compound represented by general formula (XI) has a higher elastic constant and a higher dielectric coefficient, and can further adjust the dielectric coefficient, elastic coefficient and other parameters of the liquid crystal composition to meet different performance requirements of the liquid crystal composition.

[0169] In some embodiments, R 21 and R 22may have the same selection range as R1, and can be selected from the same or different groups as R1, which will not be repeated here. In the liquid crystal composition of the present application, in addition to comprising at least one of the first compound, at least one of the second compound, at least one of the third compound, and at least one of the fourth compound, one or more of the fifth compound, the sixth compound, the seventh compound, the eighth compound, the ninth compound, the tenth compound, and the eleventh compound can also be included, and for any one of the fifth compound, the sixth compound, the seventh compound, the eighth compound, the ninth compound, the tenth compound, and the eleventh compound, one, two, or two or more can be included.

[0170] In the present application, the combination of compounds in the liquid crystal composition can be arbitrarily matched according to the performance requirements of the liquid crystal composition, and the following examples of the present application are only taken as an example of the distribution of part of the components of the liquid crystal composition, and the performance of the liquid crystal composition of the present application is illustrated by measuring the related performance parameters of the liquid crystal composition, but not limited thereto.

[0171] In the following examples of the present application, the liquid crystal composition can be prepared by a hot dissolution method, and the preparation method comprises the following steps: step S10, mixing the components of the liquid crystal composition to obtain a mixture, wherein the components can be mixed in order from low to high melting point; step S20, heating and stirring the above mixture at a temperature of 60-100°C, so that the components are fully dissolved and uniformly mixed; step S30, cooling to room temperature to obtain a liquid crystal composition.

[0172] Tables 1-7 are the component distribution and performance parameters of the liquid crystal compositions provided in Examples 1-7 of the present application, and Table 8 is the component distribution and performance parameters of the liquid crystal compositions of the comparative examples. Among them, the difference between the liquid crystal composition provided by the comparative example and the liquid crystal composition provided by Example 7 is that the liquid crystal composition in Example 7 increases the third compound.

[0173] In Tables 1-8, Tni represents the clearing point of the liquid crystal composition (unit: ℃); γ1 represents the rotational viscosity of the liquid crystal composition at 25℃ (unit: mPa / s); Δn represents the birefringence difference of the liquid crystal composition at 25℃ (representing the optical anisotropy of the liquid crystal composition); n e represents the refractive index of the extraordinary light; Δε represents the dielectric anisotropy of the liquid crystal composition at 25℃; ε ⊥ represents the dielectric coefficient perpendicular to the long axis of the liquid crystal molecule; K 11 represents the splay elastic coefficient, K 33 represents the bend elastic coefficient. In addition, unless otherwise specified, the elastic constant described in the present application represents the average elastic constant, i.e. K11 and K 33 the average value.

[0174] Table 1 Component distribution and performance parameters of liquid crystal composition of Example 1

[0175]

[0176] Table 2 Component distribution and performance parameters of liquid crystal composition of Example 2

[0177]

[0178] Table 3 Component distribution and performance parameters of liquid crystal composition of Example 3

[0179]

[0180] Table 4 Component distribution and performance parameters of liquid crystal composition of Example 4

[0181]

[0182] Table 5 Component distribution and performance parameters of liquid crystal composition of Example 5

[0183]

[0184] Table 6 Component distribution and performance parameters of liquid crystal composition of Example 6

[0185]

[0186] Table 7 Component distribution and performance parameters of liquid crystal composition of Example 7

[0187]

[0188] Table 8 Component distribution and performance parameters of liquid crystal composition of Comparative Example 1

[0189]

[0190] Through comparative analysis, it can be seen that, compared with Example 7, the liquid crystal composition provided by the comparative example has the same clear point Tni, but the optical anisotropy Δn is reduced, which will lead to the reduction of liquid crystal transmittance, the absolute value of dielectric anisotropy |Δε| is reduced, |K / Δε| is increased, which will increase the threshold voltage, so that the driving voltage is increased; in addition, the viscosity γ1 of the liquid crystal composition is increased, and γ1 / K is increased, which will further increase the response time of the liquid crystal, which is not conducive to the improvement of response speed.

[0191] It can be understood that the response time of the liquid crystal is positively correlated with the rotational viscosity γ1, and is negatively correlated with the dielectric anisotropy Δε and the splay elastic coefficient K 11The liquid crystal composition provided in the embodiments 1-7 of the present application has a rotational viscosity γ1 in the range of 70 mPa·s-85 mPa·s, which is significantly lower than the viscosity of the liquid crystal composition of the comparative examples, and thus, when the liquid crystal composition of the present application is applied to a display device, the response time of the liquid crystal can be reduced to improve the response speed of the liquid crystal. In addition, the dielectric anisotropy Δε of the liquid crystal composition provided in the embodiments 1-7 of the present application is in the range of -3.6--4.4, i.e., the liquid crystal composition of the present application has a high dielectric negative property, and the optical anisotropy Δn is in the range of 0.108-0.120, and thus, the present application can achieve the adjustability of the dielectric anisotropy Δε and the optical anisotropy Δn of the liquid crystal composition by matching different components to meet the demand for fast response liquid crystal.

[0192] In addition, in terms of power consumption, for a low-power liquid crystal display panel, it is generally necessary to reduce the driving voltage and increase the transmittance of the display panel to reduce the overall power consumption. Therefore, such products often use a large cell gap (support column height of 2.0 μm-3.8 μm) and a large optical anisotropy Δn to improve the transmittance of the liquid crystal to reduce the loss of backlight. In the liquid crystal composition provided in the embodiments 1-7 of the present application, the optical anisotropy Δn is significantly higher than that of the comparative examples, and has a high dielectric anisotropy Δε, and thus, when the liquid crystal composition of the embodiments of the present application is applied to a liquid crystal display panel, the threshold voltage of the liquid crystal display panel can be reduced, and thus the driving voltage can be reduced.

[0193] Further, in the liquid crystal composition provided in the embodiments 1-7 of the present application, the clearing point Tni of the liquid crystal composition is all above 75℃, so that the liquid crystal composition can reach the ideal liquid crystal phase in a wider temperature range.

[0194] In summary, the present application can obtain a liquid crystal composition with desired performance by matching different components of compounds based on the demand for the performance of liquid crystal transmittance, response time, and driving voltage, etc. to meet the application demand of display products.

[0195] Correspondingly, the embodiments of the present application also provide a display panel, please refer to Figure 1 The display panel 100 provided in the embodiments of the present application includes a first substrate 10, a second substrate 30, and a liquid crystal layer 20, the first substrate 10 and the second substrate 30 are oppositely arranged, and the liquid crystal layer 20 is arranged between the first substrate 10 and the second substrate 30. The material of the liquid crystal layer 20 includes the liquid crystal composition described in any of the preceding embodiments. The first substrate 10 can be an array substrate, and the second substrate 20 can be a color filter substrate. The specific structure of the array substrate and the color filter substrate are both prior art, and will not be described here.

[0196] By using the liquid crystal composition of any one of the foregoing embodiments in the display panel, the response speed and the transmittance of the display panel can be improved, and the driving voltage of the display panel can be reduced.

[0197] It should be noted that the display panel in the present application can be a VA (Vertical Alignment) display panel, an ECB (Electrically Controlled Birefringence) display panel, a PALC (Plasma Addressed Liquid Crystal) display panel, a FFS (Fringe-Field Switching) display panel, or an IPS (In-Plane Switching) display panel, etc. The type of the display panel is not specifically limited in the present application. In particular, when the display panel is a VA display panel, since the VA display panel generally has better negative dielectric anisotropy and higher contrast, when the liquid crystal composition of the present application is applied to the VA display panel as a liquid crystal material, a display panel with high contrast, fast response speed, high transmittance, and low driving voltage can be obtained, thereby widening the application range of the display panel in the present application in display products.

[0198] Further, the present application also provides an electronic device, which can include a handset, a camera, an optical fingerprint recognition device, etc. in addition to the display panel. The electronic device includes but is not limited to a mobile phone, a television, a computer, a tablet, a watch, etc.

[0199] In the foregoing embodiments, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0200] The liquid crystal composition and the display panel provided by the embodiments of the present application are described in detail above, and the principles and implementation manners of the present application are described by applying specific examples. The foregoing embodiment descriptions are only used to help understand the technical solutions and the core ideas of the present application; those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A liquid crystal composition, characterized by comprising Comprising: a first compound represented by general formula (I); Formula (I); a second compound represented by general formula (II); Formula (II); a third compound represented by general formula (III); and Formula (III); a fourth compound represented by general formula (IV); Formula (IV); a compound selected from any of the following groups of substituted or unsubstituted 、 and groups, and substituents of the above groups are each independently selected from F, Cl, Br, or I; and each is independently selected from any of the following groups, which are substituted or unsubstituted: , , , , , , , , , , , , , , , , , , , , , , and , and the substituents of the aforementioned groups are each independently selected from F, Cl, Br, or I; Z1and Z2are each independently selected from a single bond, -O-, -S-, -SO2-, -CO-, -C(O)O-, -OC(O)-, -OC(O)O-, or -C≡C-; or, Z1and Z2are each independently selected from any one of the following groups which are substituted or unsubstituted: -CH2O-, -OCH2-, -CH2-CH2-, -(CH2)3-, and -CH=CH-, and the substituents of the above groups are each independently selected from F, Cl, Br, or I; X is selected from O or S; n is selected from 0, 1, or 2; Y is selected from , or ; R1~R8are each independently selected from -H, -F, -Cl, -Br, -I, -CN, -SCN, -NCS, or -SF; or, R1~R8are each independently selected from an alkyl or alkoxy group having 1-15 carbon atoms which is substituted or unsubstituted, an alkenyl or alkenyloxy group having 2-15 carbon atoms which is substituted or unsubstituted, or an alkynyl or alkynyloxy group having 2-15 carbon atoms which is substituted or unsubstituted, and the substituents of the above groups are each independently selected from F, Cl, Br, or I.

2. The liquid crystal composition according to claim 1, characterized by the terminal groups of R1~R8are each independently selected from -H, -CN, or -CF3; and / or the methylene groups of at least one of R1~R8are each independently selected from -O-, -S-, -SO2-, -CO-, -C(O)O-, -OC(O)-, -OC(O)O-, or -C≡C-; or, the methylene groups of at least one of R1~R8are each independently selected from the following groups which are substituted or unsubstituted: -CH2O-, -OCH2-, -CH2-CH2-, -(CH2)3-, or -CH=CH-, and the substituents of the above groups are each independently selected from F, Cl, Br, or I.

3. The liquid crystal composition according to claim 2, characterized by the methylene groups of at least one of R1~R8are each independently selected from the following groups which are substituted or unsubstituted: -CH2O-, -OCH2-, -CH2-CH2-, -(CH2)3-, or -CH=CH-, and the substituents of the above groups are each independently selected from F.

4. The liquid crystal composition according to claim 1, characterized by the first compound is represented by any one of the following compounds:

5. The liquid crystal composition according to claim 1, characterized by the second compound is represented by any one of general formula (II-1) to general formula (II-15): 。 6. The liquid crystal composition according to claim 1, characterized by the third compound is represented by any one of general formula (III-1) to general formula (III-6): Ⅲ-1、 Ⅲ-2、 Ⅲ-3、 Ⅲ-4、 Ⅲ-5、 Ⅲ-6。 7. The liquid crystal composition according to claim 1, wherein the fourth compound is represented by any one of general formula (IV-1), general formula (IV-2), and general formula (IV-3): Formula (IV-1), wherein R1, R2, R3, R4, R5 Formula (IV-2), wherein R1, R2, R3, R4, R5 Formula (IV-3).

8. The liquid crystal composition according to claim 7, characterized by the fourth compound is represented by any one of general formula (IV-1-1) to general formula (IV-3-12): 。 9. The liquid crystal composition according to claim 1, characterized by the liquid crystal composition comprises: 1% to 35% by mass of the first compound; 1% to 40% by mass of the second compound; 1% to 20% by mass of the third compound; and 1% to 30% by mass of the fourth compound.

10. The liquid crystal composition according to claim 9, characterized by The liquid crystal composition comprises: 5% to 22% by mass of the first compound; 10% to 30% by mass of the second compound; 1% to 15% by mass of the third compound; and 5% to 25% by mass of the fourth compound.

11. The liquid crystal composition according to any one of claims 1 to 10, characterized by The liquid crystal composition further comprises a fifth compound represented by general formula (V): Formula (V); wherein R9and R 10 each independently is selected from a substituted or unsubstituted alkyl or alkoxy group having 1-10 carbon atoms, a substituted or unsubstituted alkenyl or alkenyloxy group having 2-10 carbon atoms, or a substituted or unsubstituted alkynyl or alkynyloxy group having 2-10 carbon atoms, and the substituents of the above groups are each independently selected from F, Cl, Br, or I.

12. The liquid crystal composition according to any one of claims 1 to 10, characterized by The liquid crystal composition further comprises a sixth compound represented by general formula (VI): Formula (VI); wherein R 11 and R 12 each independently is selected from a substituted or unsubstituted alkyl or alkoxy group having 1-10 carbon atoms, a substituted or unsubstituted alkenyl or alkenyloxy group having 2-10 carbon atoms, or a substituted or unsubstituted alkynyl or alkynyloxy group having 2-10 carbon atoms, and the substituents of the above groups are each independently selected from F, Cl, Br, or I.

13. The liquid crystal composition according to any one of claims 1 to 10, characterized by The liquid crystal composition further comprises a seventh compound represented by general formula (VII): General formula (VII); wherein R 13 and R 14 each independently is selected from a substituted or unsubstituted alkyl or alkoxy group having 1-10 carbon atoms, a substituted or unsubstituted alkenyl or alkenyloxy group having 2-10 carbon atoms, or a substituted or unsubstituted alkynyl or alkynyloxy group having 2-10 carbon atoms, and the substituents of the above groups are each independently selected from F, Cl, Br, or I.

14. The liquid crystal composition according to any one of claims 1 to 10, characterized by The liquid crystal composition further comprises an eighth compound represented by general formula (VIII): General formula (VIII); wherein R 15 and R 16 each independently is selected from a substituted or unsubstituted alkyl or alkoxy group having 1-10 carbon atoms, a substituted or unsubstituted alkenyl or alkenyloxy group having 2-10 carbon atoms, or a substituted or unsubstituted alkynyl or alkynyloxy group having 2-10 carbon atoms, and the substituents of the above groups are each independently selected from F, Cl, Br, or I.

15. The liquid crystal composition according to any one of claims 1 to 10, characterized by The liquid crystal composition further comprises a ninth compound represented by general formula (IX): Formula (IX); wherein R 17 and R 18 each independently is selected from a substituted or unsubstituted alkyl or alkoxy group having 1-10 carbon atoms, a substituted or unsubstituted alkenyl or alkenyloxy group having 2-10 carbon atoms, or a substituted or unsubstituted alkynyl or alkynyloxy group having 2-10 carbon atoms, and the substituents of the above groups are each independently selected from F, Cl, Br, or I.

16. A display panel comprising a first substrate and a second substrate, and a liquid crystal layer sandwiched between the first substrate and the second substrate, characterized in that, The material of the liquid crystal layer comprises the liquid crystal composition according to any one of claims 1 to 15.

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