Liquid crystal composition and display panel

Abstract

The present application discloses a liquid crystal composition and a display panel. In the liquid crystal composition, by adding a first compound of formula I, since a polycyclic group having large steric hindrance, which can serve as an electron donating moiety, is attached to a benzene ring on a main chain of the first compound, the electron cloud density of the main chain is increased, and the light energy threshold required for liquid crystal alignment is reduced, thereby achieving self-alignment of liquid crystals in a PI-free alignment process; moreover, the first compound has a relatively large number of polar moieties, so that the liquid crystal composition has a relatively large negative dielectric constant, facilitating improvement of the contrast of a liquid crystal display panel.

Description

Liquid crystal composition and display panel

[0001] This application claims priority to Chinese Patent Application No. 202411310537.8, filed on September 19, 2024, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the field of display, and in particular to a liquid crystal composition and display panel. BACKGROUND

[0003] The manufacturing process of a liquid crystal display panel generally includes four processes, namely, an Array process in the front stage, a Cell process in the middle stage, an alignment polyimide (PI) process, and a Module process in the rear stage. Among them, the alignment PI process is a very important process in the manufacturing of a liquid crystal panel, which directly affects the display performance of the liquid crystal display. TECHNICAL PROBLEM

[0004] In the alignment PI process, the coating and curing of the alignment film need to be accurately controlled to ensure the uniformity of the arrangement of liquid crystal molecules, so as to obtain a high-quality display effect. However, this has the problems of complex process and high operation difficulty. TECHNICAL SOLUTION

[0005] Therefore, the present application provides a liquid crystal composition and display panel, aiming to improve the problems of complex process and high operation difficulty of the existing process.

[0006] The present application is implemented in this way, and provides a liquid crystal composition and display panel.

[0007] In a first aspect, the present application provides a liquid crystal composition, which comprises at least one first compound; the first compound has a structure as shown in Formula I:

[0008] wherein,

[0009] R 4 is independently selected from alkyl, alkoxy, cycloalkyl, alkenyl, alkenyloxy, alkynyl, alkynyloxy, aryl, aryloxy, heteroaryl, heteroaryloxy, heterocycloalkyl, heterocycloalkyloxy having 1 to 15 C atoms, wherein one or more CH2groups are each independently from one another replaced by -CH=CH-, -CºC-, -CF2O-, -C(O)-, -C(O)O-, -OC(O)- or -O-; or alkyl, alkoxy, cycloalkyl, alkenyl, alkenyloxy, alkynyl, alkynyloxy, aryl, aryloxy, heteroaryl, heteroaryloxy, heterocycloalkyl, heterocycloalkyloxy having 1 to 15 C atoms, or selected from alkyl, alkoxy, cycloalkyl, alkenyl, alkenyloxy, alkynyl, alkynyloxy, aryl, aryloxy, heteroaryl, heteroaryloxy, heterocycloalkyl, heterocycloalkyloxy having 1 to 15 C atoms, one or more CH2groups are each independently from one another replaced by -CH=CH-, -CºC-, -CF2O-, -C(O)-, -C(O)O-, -OC(O)- or -O-; or alkyl, alkoxy, cycloalkyl, alkenyl, alkenyloxy, alkynyl, alkynyloxy, aryl, aryloxy, heteroaryl, heteroaryloxy, heterocycloalkyl, heterocycloalkyloxy having 1 to 15 C atoms, one or more CH2groups are each independently from one another replaced by -CH=CH-, -CºC-, -CF2O-, -C(O)-, -C(O)O-, -OC(O)- or -O-; or alkyl, alkoxy, cycloalkyl, alkenyl, alkenyloxy, alkynyl, alkynyloxy, aryl, aryloxy, heteroaryl, heteroaryloxy, heterocycloalkyl, heterocycloalkyloxy having 1 to 15 C atoms, one or more H atoms are replaced by halogen;

[0010] A 1 , A 2 each independently selected from an aromatic ring, a heteroaromatic ring, a fused ring, an aliphatic ring, an alicyclic hydrocarbon or an aliphatic heterocyclic ring, wherein one or more H atoms can optionally be replaced by L 0 substituents;

[0011] L 0 , L 1 , L 2 , L 3 in each case independently of one another selected from F, Cl, Br, I, -CN, -NO2, -NCO, -NCS, -OCN, -SCN, straight-chain or branched alkyl, alkoxy, alkylcarbonyl, alkoxycarbonyl, alkylcarbonyloxy or alkoxycarbonyloxy having 1 to 5 C atoms, or one or more H atoms in straight-chain or branched alkyl, alkoxy, alkylcarbonyl, alkoxycarbonyl, alkylcarbonyloxy or alkoxycarbonyloxy having 1 to 5 C atoms are replaced by F or Cl;

[0012] n is independently selected from 0, 1 or 2;

[0013] P is independently selected from a polymerisable group;

[0014] Sp is independently selected from a spacer group or a single bond;

[0015] R 2 is independently selected from a group that anchors to a substrate;

[0016] Z 1 , Z 2 and Z 3 are independently selected from a single bond, -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O-, -OCH2-, -CH=CH-, -C≡C-, or an alkylene group having 1 to 10 carbon atoms, or an alkenylene group having 2 to 10 carbon atoms, or an alkynyl group having 2 to 10 carbon atoms, and any non-adjacent CH2groups can be replaced by -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O-, -OCH2-, -CH=CH- or -C≡C-; or one or more H in an alkylene group having 1 to 10 carbon atoms, an alkenylene group having 2 to 10 carbon atoms, or an alkynyl group having 2 to 10 carbon atoms is replaced by a halogen atom F, Cl, Br or I;

[0017] p1, p2, p3 are independently selected from 1, 2 or 3;

[0018] r1, r2 and r3 are independently selected from 0, 1, 2 or 3.

[0019] In a second aspect, the embodiments of the present application provide a display panel, comprising:

[0020] a first substrate,

[0021] a second substrate on the first substrate;

[0022] a liquid crystal layer between the first substrate and the second substrate;

[0023] wherein the liquid crystal layer comprises the aforementioned liquid crystal composition;

[0024] the liquid crystal composition comprises at least one first compound;

[0025] the first compound has a structure as shown in Formula I:

[0026] wherein,

[0027] R 4 is independently selected from alkyl, alkoxy, cycloalkyl, alkenyl, alkenyloxy, alkynyl, alkynyloxy, each having 1 to 15 C atoms, or one or more CH2groups are each independently from one another replaced by -CH=CH-, -C≡C-, -CF2O-, -C(O)-, -C(O)O-, -OC(O)- or -O-; or alkyl, alkoxy, cycloalkyl, alkenyl, alkenyloxy, alkynyl, alkynyloxy, each having 1 to 15 C atoms, one or more H atoms are replaced by halogen atoms F, Cl, Br or I; is independently selected from alkyl, alkoxy, cycloalkyl, alkenyl, alkenyloxy, alkynyl, alkynyloxy, each having 1 to 15 C atoms, or one or more CH2groups are each independently from one another replaced by -CH=CH-, -C≡C-, -CF2O-, -C(O)-, -C(O)O-, -OC(O)- or -O-; or alkyl, alkoxy, cycloalkyl, alkenyl, alkenyloxy, alkynyl, alkynyloxy, each having 1 to 15 C atoms, one or more H atoms are replaced by halogen atoms F, Cl, Br or I; one or more CH2groups are each independently from one another replaced by -CH=CH-, -C≡C-, -CF2O-, -C(O)-, -C(O)O-, -OC(O)- or -O-; or alkyl, alkoxy, cycloalkyl, alkenyl, alkenyloxy, alkynyl, alkynyloxy, each having 1 to 15 C atoms, one or more H atoms are replaced by halogen atoms F, Cl, Br or I; one or more CH2groups are each independently from one another replaced by -CH=CH-, -C≡C-, -CF2O-, -C(O)-, -C(O)O-, -OC(O)- or -O-; or alkyl, alkoxy, cycloalkyl, alkenyl, alkenyloxy, alkynyl, alkynyloxy, each having 1 to 15 C atoms, one or more H atoms are replaced by halogen atoms F, Cl, Br or I; one or more CH2groups are each independently from one another replaced by -CH=CH-, -C≡C-, -CF2O-, -C(O)-, -C(O)O-, -OC(O)- or -O-; or alkyl, alkoxy, cycloalkyl, alkenyl, alkenyloxy, alkynyl, alkynyloxy, each having 1 to 15 C atoms, one or more H atoms are replaced by halogen atoms F, Cl, Br or I;

[0028] A 1 , A 2 are each independently selected from an aromatic ring, a heteroaromatic ring, a fused ring, an aliphatic ring, an alicyclic hydrocarbon or an aliphatic heterocyclic ring, wherein one or more H atoms can be optionally substituted by L 0 ;

[0029] L 0 , L 1 , L 2 , L 3independently of each other selected from F, CI, Br, I, -CN, -NO2, -NCO, -NCS, -OCN, -SCN, straight-chain or branched alkyl, alkoxy, alkylcarbonyl, alkoxycarbonyl, alkylcarbonyloxy or alkoxycarbonyloxy having 1 to 5 C atoms, or one or more H atoms in these groups are replaced by F or CI;

[0030] n is independently selected from 0, 1 or 2;

[0031] P is independently selected from a polymerizable group;

[0032] Sp is independently selected from a spacer group or a single bond;

[0033] R a is independently selected from a group anchoring to the substrate;

[0034] Z 1 , Z 2 and Z 3 is independently selected from a single bond, -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O, -OCH2-, -CH=CH-, -C≡C-, or an alkylene group having 1 to 10 carbon atoms, or an alkenylene group having 2 to 10 carbon atoms, or an alkynyl group having 2 to 10 carbon atoms, and any non-adjacent CH2groups can be replaced by -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O, -OCH2-, -CH=CH- or -C≡C-; or one or more H in these groups is replaced by a halogen atom F, CI, Br or I;

[0035] p1, p2, p3 are independently selected from 1, 2 or 3;

[0036] r1, r2 and r3 are independently selected from 0, 1, 2 or 3. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained according to these drawings without any creative effort.

[0038] Fig. 1 is a flow chart of a method for preparing a liquid crystal composition according to an embodiment of the present application;

[0039] Fig. 2 is a schematic diagram of a structure of a display panel according to an embodiment of the present application.

[0040] In the figure: 100, display panel; 101, first substrate; 102, second substrate; 103, liquid crystal layer. Embodiments of the present application

[0041] The technical solutions in the embodiments of the present application will be clearly and completely described 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, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application. In addition, it should be understood that the specific embodiments described herein are only for the purpose of illustration and explanation of the present application, and are not intended to limit the present application.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0043] In the present application, the orientation words such as "up" and "down" used without the opposite description generally refer to the up and down in the actual use or working state of the device, specifically the direction of the drawing surface in the figure; and "inner" and "outer" refer to the outline of the device. In addition, in the description of the present application, the term "comprising" means "including but not limited to". The terms first, second, third, etc. are only used as labels and do not impose numerical requirements or establish an order.

[0044] In the present application, "and / or" describes the association relationship of the associated objects, which means that there can be three kinds of relationships, for example, A and / or B, which can represent the following cases: A exists alone, A and B exist together, and B exists alone. Wherein A and B can be singular or plural.

[0045] In the present application, "at least one" means one or more, and "a plurality" means two or more. "One or more", "at least one of the following (one)", or the like, means any combination of these items, including a single item (one) or any combination of multiple items. For example, "at least one of a, b or c", or "at least one of a, b and c", can mean a, b, c, a-b (i.e. a and b), a-c, b-c or a-b-c, where a, b and c can be single or multiple.

[0046] Various embodiments of the present application can exist in the form of a range; it should be understood that the description in the form of a range is only for the convenience and brevity, and should not be understood as a hard limit on the scope of the present application; therefore, it should be considered that the described range has been specifically disclosed all possible sub-ranges and single values within the range. For example, it should be considered that the range description from 1 to 6 has specifically disclosed sub-ranges, such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., as well as single numbers within the described range, such as 1, 2, 3, 4, 5 and 6, regardless of the range. In addition, whenever a numerical range is indicated in the present application, it means that any cited number (fraction or integer) within the indicated range is included.

[0047] In the present application, "optionally", "optional" and "optional" mean optional, i.e. selected from "yes" or "no" in two parallel schemes, if there are multiple "optional" in a technical solution, if there is no special description, and there is no contradiction or mutual restriction relationship, each "optional" is independent. 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 including the listed features.

[0048] In the present application, "substituted" means that the hydrogen atom in the substituent is replaced by the substituent.

[0049] 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.

[0050] Traditional polyimide (Polyimide, referred to as PI) alignment layer has some problems in the production process, such as complicated process, high cost, affecting display performance, etc.

[0051] To solve the above problems, the embodiments of the present application provide a liquid crystal composition, which can include at least one first compound; the first compound has a structure as shown in Formula I:

[0052] In the above Formula I, R 4 is independently selected from alkyl, alkoxy, cycloalkyl, alkenyl, alkenyloxy, alkynyl, alkynyloxy having 1 to 15 C atoms, or one or more H atoms in alkyl, alkoxy, cycloalkyl, alkenyl, alkenyloxy, alkynyl, alkynyloxy having 1 to 15 C atoms can be replaced by F or Cl; one or more CH2 groups are each independently of one another replaced by -CH=CH-, -CºC-, -CF2O-, -C(O)-, -C(O)O-, -OC(O)- or -O-; or alkyl, alkoxy, cycloalkyl, alkenyl, alkenyloxy, alkynyl, alkynyloxy having 1 to 15 C atoms; one or more H atoms in alkyl, alkoxy, cycloalkyl, alkenyl, alkenyloxy, alkynyl, alkynyloxy having 1 to 15 C atoms are replaced by a halogen atom F, Cl, Br or I;

[0053] A 1 , A 2 are each independently selected from an aromatic ring, a heteroaromatic ring, a fused ring, an aliphatic ring, an alicyclic hydrocarbon or an aliphatic heterocyclic ring, wherein one or more H atoms can be optionally replaced by L 0 ;

[0054] L 0 , L 1 , L 2 , L 3 are each independently of one another selected from F, Cl, Br, I, -CN, -NO2, -NCO, -NCS, -OCN, -SCN, straight-chain or branched alkyl, alkoxy, alkylcarbonyl, alkoxycarbonyl, alkylcarbonyloxy or alkoxycarbonyloxy having 1 to 5 C atoms, or one or more H atoms in straight-chain or branched alkyl, alkoxy, alkylcarbonyl, alkoxycarbonyl, alkylcarbonyloxy or alkoxycarbonyloxy having 1 to 5 C atoms can be replaced by F or Cl;

[0055] n is independently selected from 0, 1 or 2;

[0056] P is independently selected from a polymerizable group;

[0057] Sp is independently selected from a spacer group or a single bond;

[0058] R a is independently selected from a group anchoring to a substrate;

[0059] Z 1 , Z 2 and Z 3 ​independently selected from a single bond, -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O, -OCH2-, -CH=CH-, -C≡C-, or an alkylene group having 1-10 carbon atoms, or an alkenylene group having 2-10 carbon atoms, or an alkynyl group having 2-10 carbon atoms, and any non-adjacent CH2groups can be replaced by -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O, -OCH2-, -CH=CH- or -C≡C-; or one or more H in the alkylene group having 1-10 carbon atoms, the alkenylene group having 2-10 carbon atoms, the alkynyl group having 2-10 carbon atoms is replaced by a halogen atom F, Cl, Br or I;

[0060] p1, p2, p3 are independently selected from 1, 2 or 3;

[0061] r1, r2 and r3 are independently selected from 0, 1, 2 or 3.

[0062] The liquid crystal composition provided by the embodiments of the present application, by adding the first compound of Formula I, due to the multi-membered ring connected to the benzene ring of the main chain of the first compound, which has large steric hindrance, can act as an electron-donating / withdrawing matrix, so as to increase the electron cloud density of the main chain, reduce the light energy threshold required for liquid crystal alignment, so as to realize the self-alignment of the liquid crystal in the alignment-free PI process; at the same time, after the light alignment is completed, the ion concentration of the liquid crystal system is stable, which can improve the reliability and reliability of the substrate; and the first compound has more polar parts, so that the liquid crystal composition has a large negative dielectric constant, which helps to improve the contrast ratio of the liquid crystal display panel.

[0063] In some embodiments of the present application, in Formula I, the multi-membered ring connected to the benzene ring of the main chain can be a three-membered ring, a four-membered ring or a five-membered ring, which has large rigidity, and helps to realize the vertical alignment of the liquid crystal composition.

[0064] In some embodiments of the present application, at least one second compound can also be included, and the second compound has a structure as shown in Formula II:

[0065] In the above Formula II, E, F, H are each independently selected from an aromatic ring, a heteroaromatic ring, a fused ring, an aliphatic ring, an alicyclic hydrocarbon or an aliphatic heterocyclic ring, wherein one or more H atoms can be optionally substituted by L 0 ;

[0066] L 0independently selected from F, Cl, Br, I, -CN, -NO2, -NCO, -NCS, -OCN, -SCN, straight chain or branched alkyl, alkoxy, alkylcarbonyl, alkoxycarbonyl, alkylcarbonyloxy or alkoxycarbonyloxy having 1 to 5 C atoms, or one or more H atoms in straight chain or branched alkyl, alkoxy, alkylcarbonyl, alkoxycarbonyl, alkylcarbonyloxy or alkoxycarbonyloxy having 1 to 5 C atoms can be replaced by F or Cl;

[0067] g is independently selected from 0, 1 or 2;

[0068] P is independently selected from a polymerizable group;

[0069] Sp is independently selected from a spacer group or a single bond;

[0070] P4, P5 are independently selected from 1, 2 or 3.

[0071] In some embodiments of the present application, Sp-P can be independently selected from the following subformulae of formula III to formula IV:

[0072] d represents an integer from 0 to 10;

[0073] Z 4 represents a single bond, -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O, -OCH2-, -CH=CH- or -C≡C-, or an alkylene group having 1 to 10 carbon atoms, or an alkenylene group having 2 to 10 carbon atoms, or an alkynyl group having 2 to 10 carbon atoms, and any non-adjacent CH2 groups can be replaced by -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O, -OCH2-, -CH=CH- or -C≡C-, or one or more H in an alkylene group having 1 to 10 carbon atoms, an alkenylene group having 2 to 10 carbon atoms, an alkynyl group having 2 to 10 carbon atoms is replaced by a halogen atom F, Cl, Br or I.

[0074] The polymerizable group of Sp-P described above is used in embodiments of the present application, which has an anchoring effect, and can fix the pre-tilt angle of the liquid crystal on the surface of the polyimide, so as to realize the alignment of the liquid crystal molecules.

[0075] In some embodiments of the present application, the group R a may be independently selected from the following subformulae of formula V:

[0076] wherein,

[0077] R1 R 2 and R 3 Each is independently selected from H, OH, F, Cl, Br, CN, SCN, NCS, or an alkyl or alkoxy group having 1-10 carbon atoms, or an alkenyl or alkenyloxy group having 2-10 carbon atoms, or an alkynyl or alkynoxy group having 2-10 carbon atoms; wherein, R 1 R 2 and R 3 The terminal group can be replaced by OH, CN, or CF3, R 1 R 2 and R 3 One or more CH2 groups in the group may be substituted with -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O, -OCH2-, -CH=CH-, or -C≡C-, and the heteroatoms may not be directly bonded; or one or more H atoms in an alkyl or alkoxy group having 1-10 carbon atoms, an alkenyl or alkenyloxy group having 2-10 carbon atoms, or an alkynyl or alkynyloxy group having 2-10 carbon atoms may be substituted with halogen atoms F, Cl, Br, or I; wherein, R 1 R 2 and R 3 The group represented has at least one terminal group, which is a hydroxyl group;

[0078] m is an integer independently selected from 0 to 10;

[0079] Z0 is independently selected from single bonds, -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O, -OCH2-, -CH=CH- or -C≡C-, or alkylene groups having 1-10 carbon atoms, or alkenyl groups having 2-10 carbon atoms, or alkynyl groups having 2-10 carbon atoms, and any non-adjacent CH2 groups can be... -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O, -OCH2-, -CH=CH- or -C≡C- substitution, or one or more H atoms of an alkylene group having 1-10 carbon atoms, an alkenyl group having 2-10 carbon atoms, or an alkynyl group having 2-10 carbon atoms are substituted with halogen atoms F, Cl, Br or I.

[0080] In some embodiments of this application, R a Selected from This group has strong polarity, which helps to achieve good adsorption and thus effectively anchor it on the substrate.

[0081] In some embodiments of the present application, the first compound of formula I can be selected from one or more of the following compounds of formulae I-A to I-Q:

[0082] wherein,

[0083] R a independently selected from a group anchoring to the substrate;

[0084] R 4 independently selected from an alkyl, alkoxy, cycloalkyl, alkenyl, alkenyloxy, alkynyl, alkynyloxy group having 1 to 15 C atoms, which can be substituted by deuterium, halogen, -CN, -NO2, -NCO, -NCS, -OCN, -SCN, -SH, -OH, -NH2, -P(II)H2or -Si(II)H3, and which can be substituted with one or more substituents each independently selected from F, Cl, Br, I, -CN, -NO2, -NCO, -NCS, -OCN, -SCN, a straight chain, branched or cyclic alkyl, alkoxy, alkylcarbonyl, alkoxycarbonyl, alkylcarbonyloxy or alkoxycarbonyloxy group having 1 to 5 C atoms or one or more H atoms in each case independently of one another in an alkyl, alkoxy, alkylcarbonyl, alkoxycarbonyl, alkylcarbonyloxy or alkoxycarbonyloxy group having 1 to 5 C atoms can be replaced by F or Cl; or selected from an alkyl, alkoxy, cycloalkyl, alkenyl, alkenyloxy, alkynyl, alkynyloxy group having 1 to 15 C atoms, which can be substituted by deuterium, halogen, -CN, -NO2, -NCO, -NCS, -OCN, -SCN, -SH, -OH, -NH2, -P(II)H2or -Si(II)H3, and which can be substituted with one or more substituents each independently selected from F, Cl, Br, I, -CN, -NO2, -NCO, -NCS, -OCN, -SCN, a straight chain, branched or cyclic alkyl, alkoxy, alkylcarbonyl, alkoxycarbonyl, alkylcarbonyloxy or alkoxycarbonyloxy group having 1 to 5 C atoms or one or more H atoms in each case independently of one another in an alkyl, alkoxy, alkylcarbonyl, alkoxycarbonyl, alkylcarbonyloxy or alkoxycarbonyloxy group having 1 to 5 C atoms can be replaced by F or Cl; one or more H atoms in each case independently of one another in an alkyl, alkoxy, alkylcarbonyl, alkoxycarbonyl, alkylcarbonyloxy or alkoxycarbonyloxy group having 1 to 5 C atoms can be replaced by F or Cl;

[0085] L 1 in each case independently of one another selected from F, Cl, Br, I, -CN, -NO2, -NCO, -NCS, -OCN, -SCN, a straight chain, branched or cyclic alkyl, alkoxy, alkylcarbonyl, alkoxycarbonyl, alkylcarbonyloxy or alkoxycarbonyloxy group having 1 to 5 C atoms or one or more H atoms in each case independently of one another in an alkyl, alkoxy, alkylcarbonyl, alkoxycarbonyl, alkylcarbonyloxy or alkoxycarbonyloxy group having 1 to 5 C atoms can be replaced by F or Cl;

[0086] Sp is independently selected from a spacer group or a single bond;

[0087] P is independently selected from a polymerisable group;

[0088] r1 is independently selected from 0, 1, 2 or 3;

[0089] X is independently selected from S, N or O.

[0090] In some embodiments of the present application, the first compound of formula I can be selected from one or more of the following compounds:

[0091] wherein,

[0092] R5, R6, R7, R8are each independently of the others selected from H, OH, F, Cl, Br, CN, SCN, NCS, or alkyl or alkoxy having 1-10 C atoms, or alkenyl or alkenyloxy having 2-10 C atoms, or alkynyl or alkynyloxy having 2-10 C atoms; where one or more CH2groups in the radicals R5, R6, R7and R8may be replaced by -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O-, -OCH2-, -CH=CH- or -C≡C- and the heteroatoms are not directly bonded to one another; or one or more H in alkyl or alkoxy having 1-10 C atoms, alkenyl or alkenyloxy having 2-10 C atoms, alkynyl or alkynyloxy having 2-10 C atoms is replaced by a halogen atom F, Cl, Br or I.

[0093] In some embodiments of the application, the second compound of formula II can be selected from one or more of the following compounds of formulae II-A to II-J:

[0094] wherein,

[0095] Sp is independently selected from a spacer group or a single bond;

[0096] P is independently selected from a polymerizable group;

[0097] L is in each case independently of the others selected from F, Cl, Br, I, -CN, -NO2, -NCO, -NCS, -OCN, -SCN, or straight-chain or branched alkyl, alkylidene, alkoxy, alkylcarbonyl, alkoxycarbonyl, alkylcarbonyloxy or alkoxycarbonyloxy having 1 to 20 C atoms, or cyclic alkyl, alkenyl, alkenylene or alkynyl having 1 to 20 C atoms, and any non-adjacent CH2groups can be replaced by -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O-, -OCH2-, -CH=CH- or -C≡C-, or one or more H in straight-chain or branched alkyl, alkylidene, alkoxy, alkylcarbonyl, alkoxycarbonyl, alkylcarbonyloxy or alkoxycarbonyloxy having 1 to 20 C atoms, cyclic alkyl, alkenyl, alkenylene or alkynyl having 1 to 20 C atoms is replaced by a halogen atom F, Cl, Br or I.

[0098] In some embodiments of the application, the second compound of formula II can be independently selected from at least one or more of the following compounds of formulae V-A to V-J:

[0099] wherein,

[0100] Rx is independently selected from H, OH, F, Cl, Br, CN, SCN, NCS, or alkyl or alkoxy having 1-10 carbon atoms, or alkenyl or alkenyloxy having 2-10 carbon atoms, or alkynyl or alkynyloxy having 2-10 carbon atoms; wherein one or more CH2 groups in the Rx group can be replaced by -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O-, -OCH2-, -CH=CH- or -C≡C- and the heteroatoms are not directly bonded, or one or more H in alkyl or alkoxy having 1-10 carbon atoms, alkenyl or alkenyloxy having 2-10 carbon atoms, alkynyl or alkynyloxy having 2-10 carbon atoms are replaced by halogen atoms F, Cl, Br or I.

[0101] In some embodiments of the present application, the mass percentage of the first compound of formula I and the second compound of formula II in the liquid crystal composition is 0.01% to 1.50%.

[0102] In the liquid crystal composition provided in the embodiments of the present application, by adding the second compound of formula II, the first compound of formula I can be polymerized under UV light irradiation to form a polymer deposited on the surface of the polyimide, so as to fix the pre-tilt angle of the liquid crystal on the surface of the polyimide, and realize the alignment of the liquid crystal molecules.

[0103] The embodiments of the present application can include the first compound and the second compound in the liquid crystal composition, and the first compound has a specific structural compound, thereby improving the performance of the liquid crystal composition in terms of clearing point, viscosity, elastic coefficient, etc., and improving the response time of the display panel using the liquid crystal composition.

[0104] By adjusting the ratio of the first compound and the second compound in the liquid crystal composition, the properties of the liquid crystal composition can be adjusted by the difference in the properties of the first compound and the second compound.

[0105] In some embodiments, the rotational viscosity of the liquid crystal composition at 25°C can be greater than or equal to 40 mPa·s, and the rotational viscosity of the liquid crystal composition at 25°C is less than or equal to 100 mPa·s, for example: 45 mPa·s, 50 mPa·s, 52 mPa·s, 55 mPa·s, 60 mPa·s, 65 mPa·s, 70 mPa·s, 75 mPa·s, 80 mPa·s, 85 mPa·s, 90 mPa·s, 95 mPa·s, etc., so that the rotational viscosity of the liquid crystal composition is within a suitable range, the rotational speed of the liquid crystal composition is improved, and the response time of the liquid crystal composition is ensured to be within a suitable range.

[0106] In some embodiments, the bend elastic coefficient of the liquid crystal composition can be greater than or equal to 10, the bend elastic coefficient of the liquid crystal composition is less than or equal to 26, for example: 10.5, 10.6, 10.8, 11, 12, 13, 13.1, 13.5, 14, 14.2, 15, 18, 20, 22, 24, 25, etc.; and / or, the splay elastic coefficient of the liquid crystal composition is greater than or equal to 10, the splay elastic coefficient of the liquid crystal composition is less than or equal to 26, for example: 10.5, 10.6, 11, 12, 13, 13.5, 13.7, 14, 15, 16, 16.1, 16.5, 18, 20, 22, 24, 25, etc. The bend elastic coefficient of the liquid crystal composition and / or the splay elastic coefficient of the liquid crystal composition is within the above range, which is beneficial to obtain a suitable average value of the elastic coefficient of the liquid crystal composition, effectively improve the response speed of the display panel when the liquid crystal composition is applied to the display surface, and thus obtain a faster response time.

[0107] In some embodiments, the dielectric anisotropy value of the liquid crystal composition at 25°C is less than 0, the dielectric anisotropy value of the liquid crystal composition at 25°C is greater than or equal to -5, for example: -4.8, -4.5, -4.1, -4, -3.5, -3.4, -3.2, -3, -2, -1, etc., which is beneficial to reduce the driving voltage required for driving the liquid crystal composition, thereby reducing the driving voltage of the liquid crystal display panel applying the liquid crystal composition, and reducing the power consumption of the liquid crystal display panel applying the liquid crystal composition.

[0108] In some embodiments, the clearing point of the liquid crystal composition can be 70°C to 99°C, for example, the clearing point of the liquid crystal composition can be 75°C, 77°C, 79°C, 80°C, 82°C, 84°C, 85°C, 88°C, 90°C, 92°C, 95°C, 97°C, 99°C, etc., so as to avoid the reduction of high temperature resistance of the liquid crystal composition caused by too low clearing point of the liquid crystal composition.

[0109] In some embodiments, the contrast ratio of the liquid crystal composition can be 5800 to 7000, for example, the contrast ratio of the liquid crystal composition can be any one of 5800, 5900, 6000, 6100, 6200, 6300, 6400, 6500, 6600, 6700, 6800, 6900 or 7000 or any one of adjacent numerical ranges. The contrast ratio of the liquid crystal composition produced in the prior art is mostly below 5800.

[0110] Referring to FIG. 1, the present application also provides an exemplary manufacturing method of a liquid crystal composition, comprising:

[0111] S100, weighing and mixing the first compound and the second compound in a first order to obtain a first mixture in percentage by mass; wherein the first order can be that the first compound and the second compound are weighed and mixed in an order from low to high melting point;

[0112] S200, stirring the first mixture at a first heating temperature to fully mix the first compound and the second compound in the first mixture, wherein the first heating temperature can be 60-100℃;

[0113] S300, cooling the first mixture to room temperature and packaging to obtain a liquid crystal composition.

[0114] In a second aspect, referring to FIG. 2, the embodiments of the present application also provide a display panel 100, comprising:

[0115] A second substrate 102 is located on the first substrate 101;

[0116] A liquid crystal layer 103 is located between the first substrate 101 and the second substrate 102;

[0117] The liquid crystal layer 103 comprises the liquid crystal composition in any of the preceding embodiments.

[0118] When the voltage is 0V, the liquid crystal molecules in the vertical alignment (VA) mode display are arranged vertically to the glass substrate, and the incident light perpendicular to the glass substrate cannot pass through, showing good dark state effect. Therefore, the VA mode display usually has negative dielectric anisotropy and better contrast.

[0119] The embodiments of the present application provide a display panel, and the liquid crystal layer comprises the liquid crystal composition of the present application. Because there are more polar parts in the liquid crystal composition, the liquid crystal composition has a larger negative dielectric constant, which helps to improve the contrast of the liquid crystal display panel. Therefore, the liquid crystal composition of the present application is suitable for use in the VA mode display.

[0120] The present application will be described in detail through specific embodiments. The following embodiments are only part of the embodiments of the present application and are not a limitation of the present application. The raw materials used in the following embodiments are commercially available products unless otherwise specified.

[0121] Example 1

[0122] The structural formula and mass fraction of each compound in the liquid crystal composition selected in this embodiment are shown in Table 1:

[0123] Table 1 Composition of liquid crystal composition

[0124] Example 2

[0125] The structural formula and mass fraction of each compound in the liquid crystal composition selected in this example are shown in Table 2:

[0126] Table 2 Components of the liquid crystal composition

[0127] Example 3

[0128] The structural formula and mass fraction of each compound in the liquid crystal composition selected in this example are shown in Table 3:

[0129] Table 3 Components of the liquid crystal composition

[0130] Example 4

[0131] The structural formula and mass fraction of each compound in the liquid crystal composition selected in this example are shown in Table 4:

[0132] Table 4 Components of the liquid crystal composition

[0133] Comparative Example 1

[0134] The difference between this comparative example and Example 1 is that the compound of Formula I is not added, and the structural formula and mass fraction of each compound in the liquid crystal composition of the comparative example are shown in Table 5.

[0135] Table 5 Components of the liquid crystal composition

[0136] Comparative Example 2

[0137] The difference between this comparative example and Example 2 is that the compound of Formula I is not added, and the structural formula and mass fraction of each compound in the liquid crystal composition of the comparative example are shown in Table 6.

[0138] Table 6 Components of the liquid crystal composition

[0139] Comparative Example 3

[0140] The difference between this comparative example and Example 3 is that the first compound of Formula I is not added, and the structural formula and mass fraction of each compound in the liquid crystal composition of the comparative example are shown in Table 7.

[0141] Table 7 Components of the liquid crystal composition

[0142] Comparative Example 4

[0143] The difference between this comparative example and Example 4 is that the first compound of Formula I and the second compound of Formula II are not added, and the structural formula and mass fraction of each compound in the liquid crystal composition of the comparative example are shown in Table 8.

[0144] Table 8 Components of liquid crystal composition

[0145] In Tables 1 to 8, unless otherwise specified, the percentages in this application are all weight percentages, and the temperature unit is ℃; Tni represents the clearing point of the liquid crystal composition (unit: ℃); Δn represents the optical anisotropy at 25℃, n e is the refractive index of the extraordinary light; γ1 represents the rotational viscosity at 25℃ (unit: mPa·s); Δε represents the dielectric anisotropy at 25℃; ε ⊥ is the dielectric constant perpendicular to the long axis of the liquid crystal molecule; K 11 is the splay elastic coefficient; K 33 is the bend elastic coefficient.

[0146] Through comparative analysis, it can be known that, compared with Comparative Examples 1-4, the liquid crystal composition of the present application is added with the first compound or the combination of the first compound and the second compound on the basis of Comparative Examples 1-4, the polycyclic ring with large steric hindrance is connected to the benzene ring of the main chain, which can be an electron-donating or electron-withdrawing group, so as to increase the electron cloud density of the main chain, reduce the light energy threshold required for liquid crystal alignment, and thus realize the self-alignment of the liquid crystal in the alignment PI process. At the same time, after the light alignment is completed, the ion concentration of the liquid crystal system is stable, which can improve the reliability and reliability of the substrate. Moreover, the first compound has more polar parts, so that the liquid crystal composition has a large negative dielectric constant, which is helpful to improve the contrast ratio of the liquid crystal display panel. The liquid crystal composition provided by Comparative Examples 1-4 does not add the first compound containing Formula I, and thus a separate alignment PI process is required to realize the alignment process.

[0147] The second compound of Formula II is added in Example 4 of the present application, which can be polymerized with the first compound of Formula I under UV light irradiation to form a polymer deposited on the surface of the polyimide, so as to fix the pre-tilt angle of the liquid crystal on the surface of the polyimide, and realize the alignment of the liquid crystal molecules.

[0148] According to the liquid crystal composition and its detection results of Examples 1-4, the liquid crystal composition provided in the present application has a clearing point Tni of 91℃, a rotational viscosity γ1 (25℃) of 94 mPa·s, an optical anisotropy Δn at 25℃ of 0.108, a refractive index n e of the extraordinary light of 1.591, a dielectric anisotropy Δε at 25℃ of -3.2, a dielectric constant ε ⊥ perpendicular to the long axis of the liquid crystal molecule of 6.5, a splay elastic coefficient K11 of 14.8, and a bend elastic coefficient K33 of 15.9.

[0149] The liquid crystal composition provided in Example 1 has a clearing point Tni greater than 90°C, thus exhibiting a wide operating temperature range and a high upper limit. It also possesses a large negative dielectric constant Δε (-3.4) at 25°C and a low driving voltage, enabling faster response time and lower power consumption. Furthermore, the liquid crystal composition provided in Example 1 has a low rotational viscosity γ1, a large dihedral elastic coefficient K11, and a large flexural elastic coefficient K33, which contribute to improving the response speed of the liquid crystal display panel. This is because a lower rotational viscosity results in a faster response time, while a larger elastic coefficient indicates a stronger ability of the liquid crystal molecules to restore their original alignment, also contributing to a faster response time.

[0150] In addition, the liquid crystal composition provided in Example 1 also has a large contrast ratio, reaching over 6800. The large negative dielectric anisotropy helps to improve the contrast ratio of the liquid crystal. At the same time, the liquid crystal composition in this example has a large number of polar parts. By adding the first compound represented by general formula I to the liquid crystal composition, the liquid crystal composition has a large negative dielectric constant Δε, which helps to improve the contrast ratio of the liquid crystal display panel.

[0151] A comparison of Examples 2 to 4 with Comparative Examples 2 to 4 reveals that adding different self-aligning additives to a conventional liquid crystal formulation results in minimal fluctuations in values ​​such as rotational viscosity, clearing point, negative dielectric constant, and flexural elasticity. Furthermore, the test results of Example 4 indicate that the two alignment agents, General Formula I and General Formula II, can be used in combination.

[0152] High-resolution mass spectrometry was performed on the liquid crystal compositions of Examples 1 to 4. The [M+H] content of the self-aligning additive (first compound) in Example 1 was measured. + =697.4, [M+H] measured in the self-aligning additive (first compound) of Example 2. + 803.4, [M+H] measured in the self-aligning additive (first compound) of Example 3. + 835.5, [M+H] of the first compound in Example 4 + 783.5, [M+H] of the second compound + All 355.1 were confirmed as the target product.

[0153] 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 using specific examples. The above description of the embodiments is only used to help understand the method of the present application and its core idea; meanwhile, for those skilled in the art, according to the idea of the present application, the specific implementation manners and application ranges will be changed, and the above description of the embodiments should not be understood as a limitation on the present application.

Claims

1. A liquid crystal composition, the liquid crystal composition comprising at least one first compound; The first compound has a structure as shown in Formula I: wherein R 4 Independently selected from alkyl, alkoxy, cycloalkyl, alkenyl, alkenyloxy, alkynyl, alkynyloxy groups having 1 to 15 carbon atoms. Or selected from alkyl, alkoxy, cycloalkyl, alkenyl, alkenyloxy, alkynyl, alkynyloxy groups having 1 to 15 carbon atoms. One or more CH2 groups in the mixture are each independently converted to -CH=CH-, -C≡C-, -CF2O-, -CO-, -C(O)O-, -OC(O)-, or -O- substitution; or alkyl, alkoxy, cycloalkyl, alkenyl, alkenoxy, alkynyl, alkynoxy, or alkynoxy groups having 1 to 15 carbon atoms. one or more H atoms in are replaced by a halogen atom F, CI, Br or I; A 1 、A 2 each independently is selected from an aromatic ring, a heteroaromatic ring, a fused ring, an aliphatic ring, an alicyclic hydrocarbon, or an aliphatic heteroring, wherein one or more H atoms can be optionally substituted by L 0 ; L 0 , L 1 , L 2 , L 3 in each case independently of one another from F, Cl, Br, I, -CN, -NO2, -NCO, -NCS, -OCN, -SCN, straight-chain or branched alkyl, alkoxy, alkylcarbonyl, alkoxycarbonyl, alkylcarbonyloxy or alkoxycarbonyloxy having 1 to 5 C atoms, or one or more H atoms in straight-chain or branched alkyl, alkoxy, alkylcarbonyl, alkoxycarbonyl, alkylcarbonyloxy or alkoxycarbonyloxy having 1 to 5 C atoms are replaced by F or Cl; n is independently selected from 0, 1 or 2; P is independently selected from a polymerisable group; Sp is independently selected from a spacer group or a single bond; R a independently selected from groups that anchor to a substrate; Z 1 , Z 2 and Z 3 are independently selected from a single bond, -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O, -OCH2-, -CH=CH-, -C≡C-, or an alkylene group having 1 to 10 carbon atoms, or an alkenylene group having 2 to 10 carbon atoms, or an alkynyl group having 2 to 10 carbon atoms, and any non-adjacent CH2groups can be replaced by -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O, -OCH2-, -CH=CH- or -C≡C-; or one or more H in these groups alkylene group having 1 to 10 carbon atoms, alkenylene group having 2 to 10 carbon atoms, alkynyl group having 2 to 10 carbon atoms is replaced by a halogen atom F, Cl, Br or I; p1, p2, p3 are independently selected from 1, 2 or 3; r1, r2 and r3 are independently selected from 0, 1, 2 or 3.

2. The liquid crystal composition of claim 1, wherein, The liquid crystal composition further includes at least one second compound having a structure as shown in Formula II: wherein E, F, H are each independently selected from the group consisting of aromatic ring, heteroaromatic ring, fused ring, aliphatic ring, alicyclic hydrocarbon or aliphojeterocyclic ring, wherein one or more H atoms can optionally be replaced by L 0 substituted; g is independently selected from 0, 1 or 2; P is independently selected from a polymerisable group; Sp is independently selected from a spacer group or a single bond; p4, p5 are each independently selected from 1, 2 or 3.

3. The liquid crystal composition of claim 1, wherein, The Sp-P is independently selected from the group consisting of subformulae of formula III to formula IV: d denotes an integer from 0 to 10; Z 4 represents a single bond, -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O, -OCH2-, -CH=CH- or -C≡C-, or an alkylene group having 1 to 10 carbon atoms, or an alkenylene group having 2 to 10 carbon atoms, or an alkynyl group having 2 to 10 carbon atoms, and any non-adjacent CH2groups can be replaced by -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O, -OCH2-, -CH=CH- or -C≡C-, or one or more H in these groups is replaced by a halogen atom F, Cl, Br or I.

4. The liquid crystal composition of claim 1, wherein, R groups that anchor to the substrate a independently selected from the subformulae of formula V: wherein R 1 , R 2 and R 3 are each independently of the others selected from H, OH, F, Cl, Br, CN, SCN, NCS, or alkyl or alkoxy having 1-10 carbon atoms, or alkenyl or alkenyloxy having 2-10 carbon atoms, or alkynyl or alkynyloxy having 2-10 carbon atoms; wherein the terminal groups of R 1 , R 2 and R 3 may be substituted by OH, CN or CF3, one or more CH2groups in the radicals R 1 , R 2 and R 3 may be replaced by -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O-, -OCH2-, -CH=CH- or -C≡C- and the hetero atoms are not directly bonded to one another; or one or more H in these radicals alkyl or alkoxy having 1-10 carbon atoms, alkenyl or alkenyloxy having 2-10 carbon atoms, alkynyl or alkynyloxy having 2-10 carbon atoms is replaced by a halogen atom F, Cl, Br or I; wherein at least one of the terminal groups represented by R 1 , R 2 and R 3 is hydroxyl; m is independently selected from an integer from 0 to 10; Z0is independently selected from a single bond, -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O, -OCH2-, -CH=CH- or -C≡C-, or an alkylene group having 1 to 10 carbon atoms, or an alkenylene group having 2 to 10 carbon atoms, or an alkynyl group having 2 to 10 carbon atoms, and any non-adjacent CH2groups can be replaced by -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O, -OCH2-, -CH=CH- or -C≡C-, or one or more H in these groups is replaced by a halogen atom F, CI, Br or I.

5. The liquid crystal composition of claim 1, wherein, The first compound of Formula I is selected from one or more of the following compounds of Formulas I-A to I-Q: wherein R a independently selected from groups that anchor to a substrate; R 4 Independently selected from alkyl, alkoxy, cycloalkyl, alkenyl, alkenyloxy, alkynyl, alkynyloxy groups having 1 to 15 carbon atoms. Or selected from alkyl, alkoxy, cycloalkyl, alkenyl, alkenyloxy, alkynyl, alkynyloxy groups having 1 to 15 carbon atoms. one or more H atoms in are replaced by a halogen atom F, CI, Br or I; L 1 in each case independently from one another selected from F, CI, Br, I, -CN, -NO2, -NCO, -NCS, -OCN, -SCN, straight-chain or branched- chain alkyl, alkoxy, alkylcarbonyl, alkoxycarbonyl, alkylcarbonyloxy or alkoxycarbonyloxy having 1 to 5 C atoms; or one or more H atoms in straight-chain or branched alkyl, alkoxy, alkylcarbonyl, alkoxycarbonyl, alkylcarbonyloxy or alkoxycarbonyloxy having 1 to 5 C atoms are replaced by F or CI; Sp is independently selected from a spacer group or a single bond; P is independently selected from a polymerisable group; r1is independently selected from 0, 1, 2 or 3; X is independently selected from S, N or O.

6. The liquid crystal composition of claim 1, wherein, The first compound of Formula I is selected from one or more of the following compounds: wherein R5, R6, R7, R8each independently of the others denote H, OH, F, CI, Br, CN, SCN, NCS, or an alkyl or alkoxy group having 1 to 10 carbon atoms, or an alkenyl or alkenyloxy group having 2 to 10 carbon atoms, or an alkynyl or alkynyloxy group having 2 to 10 carbon atoms; wherein one or more CH2groups in the R5, R6, R7and R8groups can be replaced by -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O, -OCH2-, -CH=CH- or -C≡C- and the heteroatoms are not directly bonded; or one or more H in the alkyl or alkoxy group having 1 to 10 carbon atoms, the alkenyl or alkenyloxy group having 2 to 10 carbon atoms, the alkynyl or alkynyloxy group having 2 to 10 carbon atoms is replaced by F, CI, Br or I.

7. The liquid crystal composition of claim 1, wherein, The liquid crystal composition further includes at least one second compound having a structure as shown in Formula II: wherein E, F, H are each independently selected from the group consisting of an aromatic ring, a heteroaromatic ring, a fused ring, an aliphatic ring, an alicyclic hydrocarbon or an aliphatic heterocyclic ring, wherein one or more H atoms can optionally be replaced by L 0 substituted; g is independently selected from 0, 1 or 2; Sp is independently selected from a spacer group or a single bond; P is independently selected from a polymerisable group; p4and p5are independently selected from 1, 2 or 3.

8. The liquid crystal composition of claim 7, wherein, The second compound of Formula II is selected from one or more of the following compounds of Formulae II-A to II-J: wherein Sp is independently selected from a spacer group or a single bond; P is independently selected from a polymerisable group; L is in each case independently of the others selected from F, Cl, Br, I, -CN, -NO2, -NCO, -NCS, -SiR12R13R14, -OR11, -SR11, -N(R11)2, -N=CR11R12, -C(=O)R11, -C(=NR11)R12, -C(=NOR11)R12, -C(=NR11)N(R11)2, -C(=O)N(R11)2, -C(=S)N(R11)2, -C(=O)O-R11, -C(=NR11)O-R11, -OC(=O)-R11, -OC(=NR11)-R12, -OC(=O)O-R11, -P(=O)(R11)2, -P(=O)(OR11)2, -P(=O)(NR11)2, -P(=O)(R11)(OR11), -P(=O)(R11)(NR11), -P(=O)(OR11)(NR11), -P(R11)2, -Si(R12)3, -Ge(R12)3, -Sn(R12)3, -O-Si(R12)2, -S-Si(R12)2, -C(=S)R12, -C(=O)R12, -C(=S)SR12, -C(=S)N(R11)2, -C(=O)N(R11)2, -C(=O)O-R11, -C(=O)SR12, -C(=O)S-R12, -C(=O)P(R12)2, -C(=O)P(=O)(R12)2, -C(=O)P(=O)(NR11)2, -C(=O)P(=O)(OR11)2, -C(=O)P(R12)(NR11), -C(=O)P(R12)(OR11), -C(=O)P(=O)(NR11)(OR11), -C(=O)P(=O)(NR11)(NR11), -C(=O)P(=O)(R12)(R12), -C(=O)P(R12)2, -C(=O)O-R11, -C(=O)S-R12, -C(=O)N(R11)2, -C(=O)P(=O)(R12)2, -C(=O)P(=O)(NR11)2, -C(=O)P(=O)(OR11)2, -C(=O)P(R12)(NR11), -C(=O)P(R12)(OR11), -C(=O)P(=O)(NR11)(OR11), -C(=O)P(=O)(NR11)(NR11), -C(=O)P(R12)(R12), -C(=O)P(R12)2, -C(=O)Si(R12)3, -C(=O)Ge(R12)3, -C(=O)Sn(R12)3, -C(=O)O-Si(R12)2, -C(=O)S-Si(R12)2, -C(=O)P(=O)(R12)2, -C(=O)P(=O)(NR11)2, -C(=O)P(=O)(OR11)2, -C(=O)P(R12)(NR11), -C(=O)P(R12)(OR11), -C(=O)P(=O)(NR11)(OR11), -C(=O)P(=O)(NR11)(NR11), -C(=O)P(R12)(R12), -C(=O)P(R12)2, -C(=O)Si(R12)3, -C(=O)Ge(R12)3, -C(=O)Sn(R12)3, -C(=O)O-Si(R12)2, -C(=O)S-Si(R12)2, -C(=S)R12, -C(=S)SR12, -C(=S)N(R11)2, -C(=NR11)R12, -C(=I)R12, -C(=Br)R12, -C(=Cl)R12, -C(=F)R12, -C(=O)O-R12, -C(=O)S-R12, -C(=O)N(R11)2, -C(=S)N(R11)2, -C(=NR11)N(R11)2, -C(=O)P(=O)(R12)2, -C(=O)P(=O)(NR11)2, -C(=O)P(=O)(OR11)2, -C(=O)P(R12)(NR11), -C(=O)P(R12)(OR11), -C(=O)P(=O)(NR11)(OR11), -C(=O)P(=O)(NR11)(NR11), -C(=O)P(R12)(R12), -C(=O)P(R12)2, -C(=O)Si(R12)3, -C(=O)Ge(R12)3, -C(=O)Sn(R12)3, -C(=O)O-Si(R12)2, -C(=O)S-Si(R12)2, -C(=O)P(=O)(R12)2, -C(=O)P(=O)(NR11)2, -C(=O)P(=O)(OR11)2, -C(=O)P(R12)(NR11), -C(=O)P(R12)(OR11), -C(=O)P(=O)(NR11)(OR11), -C(=O)P(=O)(NR11)(NR11), -C(=O)P(R12)(R12), -C(=O)P(R12)2, -C(=O)Si(R12)3, -C(=O)Ge(R12)3, -C(=O)Sn(R12)3, -C(=O)O-Si(R12)2, -C(=O)S-Si(R12)2, -C(=S)R12, -C(=S)SR12, -C(=S)N(R11)2, -C(=NR11)R12, -C(=I)R12, -C(=Br)R12, -C(=Cl)R12, -C(=F)R12, -C(=O)O-R12, -C(=O)S-R12, -C(=O)N(R11)2, -C(=S)N(R11)2, -C(=NR11)N(R11)2, -Si(R12)3, -Ge(R12)3, -Sn(R12)3, -O-Si(R12)2, -S-Si(R12)2, -P(R12)2, -P(=O)(R12)2, -P(=O)(NR11)2, -P(=O)(OR11)2, -P(R12)(NR11), -P(R12)(OR11), -P(=O)(NR11)(OR11), -P(=O)(NR11)(NR11), -P(R12)(R12), -P(R12)2, -Si(R12)3, -Ge(R12)3, -Sn(R12)3, -O-Si(R12)2, -S-Si(R12)2, -O-P(=O)(R12)2, -S-P(=O)(R12)2, -O-P(=O)(NR11)2, -S-P(=O)(NR11)2, -O-P(=O)(OR11)2, -S-P(=O)(OR11)2, -O-P(R12)(NR11), -S-P(R12)(NR11), -O-P(R12)(OR11), -S-P(R12)(OR11), -O-P(=O)(NR11)(OR11), -S-P(=O)(NR11)(OR11), -O-P(=O)(NR11)(NR11), -S-P(=O)(NR11)(NR11), -O-P(R12)(R12), -S-P(R12)(R12), -O-P(R12)2, -S-P(R12)2, -O-Si(R12)3, -S-Si(R12)3, -O-Ge(R12)3, -S-Ge(R12)3, -O-Sn(R12)3, -S-Sn(R12)3, -N(R11)2, -N=CR11R12, -CN, -OCN, -SCN, or a straight chain, branched or cyclic alkyl, alkenyl, alkynyl, alkoxy, alkylcarbonyl, alkoxycarbonyl, alkylcarbonyloxy or alkoxycarbonyloxy group having 1 to 20 C atoms which is non- ​ 9. The liquid crystal composition of claim 7, wherein, the second compound of Formula II is independently selected from at least one or more of the following compounds of Formulas V-A to V-J: ​ ​ ​ 10. The liquid crystal composition of claim 7, wherein, ​ ​ ​ ​ ​ ​ ​ ​ The first compound has a structure as shown in Formula I: ​ R 4 Independently selected from alkyl, alkoxy, cycloalkyl, alkenyl, alkenyloxy, alkynyl, alkynyloxy groups having 1 to 15 carbon atoms. Or selected from alkyl, alkoxy, cycloalkyl, alkenyl, alkenyloxy, alkynyl, alkynyloxy groups having 1 to 15 carbon atoms. One or more CH2 groups in the mixture are each independently converted to -CH=CH-, -C≡C-, -CF2O-, ​ -C(O)O-, -OC(O)-, or -O- substitution; or alkyl, alkoxy, cycloalkyl, alkenyl, alkenoxy, alkynyl, alkynoxy, or alkynoxy groups having 1 to 15 carbon atoms. ​ A 1 , A 2 are each independently selected from an aromatic ring, a heteroaromatic ring, a fused ring, an aliphatic ring, an alicyclic hydrocarbon, or an aliphatic heteroring, wherein one or more H atoms can be optionally substituted with L 0 ; L 0 , L 1 , L 2 , L 3 in each case independently of one another from F, Cl, Br, I, -CN, -NO2, -NCO, -NCS, -OCN, -SCN, straight-chain or branched alkyl, alkoxy, alkylcarbonyl, alkoxycarbonyl, alkylcarbonyloxy or alkoxycarbonyloxy having 1 to 5 C atoms, or one or more H atoms in straight-chain or branched alkyl, alkoxy, alkylcarbonyl, alkoxycarbonyl, alkylcarbonyloxy or alkoxycarbonyloxy having 1 to 5 C atoms are replaced by F or Cl; ​ ​ ​ R a independently selected from groups that anchor to a substrate; Z 1 , Z 2 and Z 3 are independently selected from a single bond, -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O, -OCH2-, -CH=CH-, -C≡C-, or an alkylene group having 1 to 10 carbon atoms, or an alkenylene group having 2 to 10 carbon atoms, or an alkynyl group having 2 to 10 carbon atoms, and any non-adjacent CH2groups can be replaced by -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O, -OCH2-, -CH=CH- or -C≡C-; or one or more H in these groups alkylene group having 1 to 10 carbon atoms, alkenylene group having 2 to 10 carbon atoms, alkynyl group having 2 to 10 carbon atoms is replaced by a halogen atom F, Cl, Br or I; ​ ​ 12. The display panel of claim 11, wherein, The liquid crystal composition further includes at least one second compound having a structure as shown in Formula II: ​ E, F, H are each independently selected from the group consisting of an aromatic ring, a heteroaromatic ring, a fused ring, an aliphatic ring, an alicyclic hydrocarbon or an aliphatic heterocyclic ring, wherein one or more H atoms can optionally be replaced by L 0 substituted; ​ ​ ​ ​ 13. The display panel of claim 11, wherein, The Sp-P is independently selected from the group consisting of subformulae of formula III to formula IV: ​ Z 4 represents a single bond, -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O, -OCH2-, -CH=CH- or -C≡C-, or an alkylene group having 1 to 10 carbon atoms, or an alkenylene group having 2 to 10 carbon atoms, or an alkynyl group having 2 to 10 carbon atoms, and any non-adjacent CH2groups can be replaced by -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O, -OCH2-, -CH=CH- or -C≡C-, or one or more H in these groups is replaced by a halogen atom F, Cl, Br or I.

14. The display panel of claim 11, wherein, R groups that anchor to the substrate a independently selected from the subformulae of formula V: ​ R 1 , R 2 and R 3 are each, independently of one another, selected from H, OH, F, Cl, Br, CN, SCN, NCS, or alkyl or alkoxy having 1-10 carbon atoms, or alkenyl or alkenyloxy having 2-10 carbon atoms, or alkynyl or alkynyloxy having 2-10 carbon atoms; wherein the terminal groups of R 1 , R 2 and R 3 may be substituted by OH, CN or CF3, one or more CH2groups in the radicals R 1 , R 2 and R 3 may be replaced by -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O-, -OCH2-, -CH=CH- or -C≡C- and the hetero atoms are not directly bonded to one another; or one or more H in these radicals alkyl or alkoxy having 1-10 carbon atoms, alkenyl or alkenyloxy having 2-10 carbon atoms, alkynyl or alkynyloxy having 2-10 carbon atoms is replaced by a halogen atom F, Cl, Br or I; wherein at least one of the terminal groups represented by R 1 , R 2 and R 3 is hydroxyl; ​ Z0is independently selected from a single bond, -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O, -OCH2-, -CH=CH- or -C≡C-, or an alkylene group having 1 to 10 carbon atoms, or an alkenylene group having 2 to 10 carbon atoms, or an alkynyl group having 2 to 10 carbon atoms, and any non-adjacent CH2groups can be replaced by -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O, -OCH2-, -CH=CH- or -C≡C- or one or more H in these groups alkylene group having 1 to 10 carbon atoms, alkenylene group having 2 to 10 carbon atoms, alkynyl group having 2 to 10 carbon atoms is replaced by a halogen atom F, Cl, Br or I.

15. The display panel of claim 11, wherein, The first compound of Formula I is selected from one or more of the following compounds of Formulas I-A to I-Q: wherein, R 2 independently selected from groups that anchor to a substrate; R 4 Independently selected from alkyl, alkoxy, cycloalkyl, alkenyl, alkenyloxy, alkynyl, alkynyloxy groups having 1 to 15 carbon atoms. Or selected from alkyl, alkoxy, cycloalkyl, alkenyl, alkenyloxy, alkynyl, alkynyloxy groups having 1 to 15 carbon atoms. one or more H atoms are replaced by a halogen atom F, Cl, Br or I; L 1 independently from each other in each case selected from F, CI, Br, I, -CN, -NO2, -NCO, -NCS, -OCN, -SCN, straight-chain or branched alkyl, alkoxy, alkylcarbonyl, alkoxycarbonyl, alkylcarbonyloxy or alkoxycarbonyloxy having 1 to 5 C atoms, or one or more H atoms in straight-chain or branched alkyl, alkoxy, alkylcarbonyl, alkoxycarbonyl, alkylcarbonyloxy or alkoxycarbonyloxy having 1 to 5 C atoms is replaced by F or Cl; Sp is independently selected from a spacer group or a single bond; P is independently selected from a polymerizable group; r1is independently selected from 0, 1, 2 or 3; X is independently selected from S, N or O.

16. The display panel of claim 11, wherein, The first compound of Formula I is selected from one or more of the following compounds: wherein, R5, R6, R7, R8each independently of one another denote H, OH, F, Cl, Br, CN, SCN, NCS, or alkyl or alkoxy having 1 to 10 carbon atoms, or alkenyl or alkenyloxy having 2 to 10 carbon atoms, or alkynyl or alkynyloxy having 2 to 10 carbon atoms; wherein one or more CH2groups in the R5, R6, R7and R8radicals can be replaced by -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O, -OCH2-, -CH=CH- or -C≡C- and the heteroatoms are not directly bonded; or one or more H in alkyl or alkoxy having 1 to 10 carbon atoms, alkenyl or alkenyloxy having 2 to 10 carbon atoms, alkynyl or alkynyloxy having 2 to 10 carbon atoms is replaced by F, Cl, Br or I.

17. The display panel of claim 11, wherein, The liquid crystal composition further includes at least one second compound having a structure as shown in Formula II: wherein, E, F, H are each independently selected from the group consisting of an aromatic ring, a heteroaromatic ring, a fused ring, an aliphatic ring, an alicyclic hydrocarbon or an aliphatic heterocyclic ring, wherein one or more H atoms can optionally be substituted by L 0 substituted; g is independently selected from 0, 1 or 2; Sp is independently selected from a spacer group or a single bond; P is independently selected from a polymerizable group; p4and p5are independently selected from 1, 2 or 3.

18. The display panel of claim 17, wherein, The second compound of Formula II is selected from one or more of the following compounds of Formulas II-A to II-J: wherein, Sp is independently selected from a spacer group or a single bond; P is independently selected from a polymerizable group; L is in each case independently of the others selected from F, Cl, Br, I, -CN, -NO2, -NCO, -NCS, -OCN, -SCN, or straight-chain or branched alkyl, alkenyl, alkynyl, alkoxy, alkylcarbonyl, alkoxycarbonyl, alkylcarbonyloxy or alkoxycarbonyloxy having 1 to 20 C atoms, and any non-adjacent CH2groups can be substituted by -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O-, -OCH2-, -CH=CH- or -C≡C- or one or more H in a straight-chain or branched alkyl, alkenyl, alkynyl, alkoxy, alkylcarbonyl, alkoxycarbonyl, alkylcarbonyloxy or alkoxycarbonyloxy having 1 to 20 C atoms, a cyclic alkyl, alkenyl, alkynyl group having 1 to 20 C atoms, one or more H in a straight-chain or branched alkyl, alkenyl, alkynyl, alkoxy, alkylcarbonyl, alkoxycarbonyl, alkylcarbonyloxy or alkoxycarbonyloxy having 1 to 20 C atoms, a cyclic alkyl, alkenyl, alkynyl group having 1 to 20 C atoms is substituted by a halogen atom F, Cl, Br or I.

19. The display panel of claim 17, wherein, The second compound of Formula II is independently selected from at least one or more of the following compounds of Formulas V-A to V-J: wherein, Rx is independently selected from H, OH, F, Cl, Br, CN, SCN, NCS, or alkyl or alkoxy having 1-10 carbon atoms, or alkenyl or alkenyloxy having 2-10 carbon atoms, or alkynyl or alkynyloxy having 2-10 carbon atoms; wherein one or more CH2groups in the Rx group can be substituted by -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O-, -OCH2-, -CH=CH- or -C≡C- and the heteroatoms are not directly bonded, or one or more H in an alkyl or alkoxy having 1-10 carbon atoms, an alkenyl or alkenyloxy having 2-10 carbon atoms, an alkynyl or alkynyloxy having 2-10 carbon atoms is substituted by a halogen atom F, Cl, Br or I.

20. The display panel of claim 17, wherein, The first compound of formula I and the second compound of formula II are each present in the liquid crystal composition in a mass percentage of 0.01% to 1.50%.

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