Liquid crystal composition and display panel

Abstract

The invention relates to a liquid crystal composition and a display panel. The liquid crystal composition comprises a liquid crystal compound and a first polymerizable compound, wherein the chemical structural formula of the first polymerizable compound is as shown in formula I: # imgabs0 # I; according to the liquid crystal composition, the angular rate of the liquid crystal composition in the alignment process can be reduced, the illumination uniformity in the alignment layer manufacturing process is further improved, and the bright spot phenomenon is improved.

Description

Technical Field

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

[0002] Liquid crystal materials are widely used in various display devices such as mobile phones, televisions and computers. Liquid crystal plays the role of a "light valve" in a thin film transistor liquid crystal display (TFT-LCD), which controls the amount of backlight transmitted to adjust the brightness of the display device.

[0003] The traditional vertical alignment (VA) liquid crystal display panel consists of a TFT substrate, a color filter (CF) substrate, a polyimide (PI) alignment layer and a liquid crystal composition sandwiched between the two substrates. The liquid crystal molecules in the liquid crystal composition are vertically aligned through the PI alignment layer. When the external voltage is 0V, the long axis direction of the liquid crystal molecules in the VA mode display is perpendicular to the glass substrate; after the natural light passes through the polarizer on the TFT substrate side, it forms linearly polarized light. At this time, its polarization state and polarization direction cannot be changed by the liquid crystal molecules, and thus it is absorbed by the polarizer on the CF substrate side, that is, the incident light perpendicular to the glass substrate cannot pass through, and the display presents a dark state effect. Therefore, VA mode display devices usually have negative dielectric anisotropy (Δε) and high contrast.

[0004] At present, the angular velocity of the liquid crystal composition in the alignment process of the liquid crystal display panel is relatively fast, which in turn leads to poor illumination uniformity and easily generates bright spots and other problems. Summary of the invention

[0005] The embodiments of the present application provide a liquid crystal composition and a display panel, which can reduce the angular velocity of the liquid crystal composition during the alignment process, improve the uniformity of light in the alignment layer process, and improve the bright spot phenomenon.

[0006] In order to achieve the above-mentioned object, an embodiment of the present application provides a liquid crystal composition, wherein the liquid crystal composition comprises a liquid crystal compound and a first polymerizable compound, wherein the chemical structure of the first polymerizable compound is as shown in Formula I:

[0007]

[0008] in, is selected from substituted or unsubstituted aromatic groups having 6 to 50 carbon atoms;

[0009] Sp is selected from a spacer group or a single bond;

[0010] P is selected from polymerizable groups;

[0011] R is selected from -H, -F, -Cl, -Br, -CN, -SCN, -NCS, a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 10 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 10 carbon atoms, a substituted or unsubstituted alkenyloxy group having 2 to 10 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 10 carbon atoms, and a substituted or unsubstituted alkynyloxy group having 2 to 10 carbon atoms, wherein the terminal group of R is unsubstituted or substituted by one of -CN and -CF3, and one or more -H in R is unsubstituted or substituted by one of -F, -Cl, -Br and -I.

[0012] In one embodiment of the present application, is selected from substituted or unsubstituted phenyl, When replaced, Any of the above -H is substituted by -F, -Cl, -Br, an alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, an alkenyloxy group having 2 to 10 carbon atoms, an alkynyl group having 2 to 10 carbon atoms, or an alkynyloxy group having 2 to 10 carbon atoms.

[0013] In one embodiment of the present application, Sp-P is selected from the group shown in Formula II or Formula III:

[0014]

[0015] Wherein, Z is selected from a single bond, -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O-, -OCH2-, -CH=CH-, a substituted or unsubstituted alkylene group having 1 to 10 carbon atoms, a substituted or unsubstituted alkenylene group having 2 to 10 carbon atoms, and a substituted or unsubstituted alkynyl group having 2 to 10 carbon atoms, and one or more -H in Z is unsubstituted or substituted by -F, -Cl, -Br, or -I;

[0016] a is selected from any integer between 0 and 10.

[0017] In one embodiment of the present application, when Z is selected from a substituted or unsubstituted alkylene having 1 to 10 carbon atoms, a substituted or unsubstituted alkenylene having 2 to 10 carbon atoms, or a substituted or unsubstituted alkynyl having 2 to 10 carbon atoms, any non-adjacent -CH2- in Z is unsubstituted or substituted by -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O-, -OCH2-, -CH=CH-, or -C≡C-.

[0018] In one embodiment of the present application, when R is selected from a substituted or unsubstituted alkyl having 1 to 10 carbon atoms, a substituted or unsubstituted alkoxy having 1 to 10 carbon atoms, a substituted or unsubstituted alkenyl having 2 to 10 carbon atoms, a substituted or unsubstituted alkenyloxy having 2 to 10 carbon atoms, a substituted or unsubstituted alkynyl having 2 to 10 carbon atoms, and a substituted or unsubstituted alkynyloxy having 2 to 10 carbon atoms, one or more CH2 in R is unsubstituted or replaced by -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O-, -OCH2-, -CH=CH-, or -C≡C-, and the heteroatom is not directly bonded.

[0019] In one embodiment of the present application, the chemical structural formula of the first polymerizable compound is selected from any one of the following formulas I-1 to I-9:

[0020]

[0021] In one embodiment of the present application, the liquid crystal composition further includes a second polymerizable compound, and the chemical structural formula of the second polymerizable compound is as shown in Formula (1):

[0022]

[0023] in, A substituted or unsubstituted aromatic group having 6 to 60 carbon atoms, a substituted or unsubstituted heteroaryl group having 5 to 60 carbon atoms, a substituted or unsubstituted alicyclic group having 6 to 60 carbon atoms, a substituted or unsubstituted heterocyclic group having 5 to 60 carbon atoms, and a substituted or unsubstituted condensed ring group having 5 to 60 carbon atoms;

[0024] Sp1 is selected from a spacer group or a single bond;

[0025] P1 is selected from polymerizable groups;

[0026] b is selected from 0, 1, 2, 3 or 4.

[0027] In one embodiment of the present application, the liquid crystal composition further comprises a self-aligning compound, and the chemical structure of the self-aligning compound is shown in Formula (2):

[0028]

[0029] in, A substituted or unsubstituted cycloalkyl group having 3 to 30 carbon atoms, a substituted or unsubstituted heterocycloalkyl group having 2 to 30 carbon atoms, a substituted or unsubstituted aromatic group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaromatic group having 4 to 30 carbon atoms, and a substituted or unsubstituted condensed ring group having 4 to 30 carbon atoms;

[0030] Z1, Z2 and Z3 are selected from a single bond, -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O-, -OCH2-, -CH=CH-, an alkylene group having 1 to 10 carbon atoms, an alkenylene group having 2 to 10 carbon atoms, and an alkynyl group having 2 to 10 carbon atoms; any non-adjacent -CH2- group in Z1, Z2 and Z3 is unsubstituted or substituted with -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O-, -OCH2-, -CH=CH-, or -C≡C-; one or more -H in Z1, Z2 and Z3 is unsubstituted or substituted with -F, -Cl, -Br, or -I;

[0031] R1 is selected from a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 30 carbon atoms, a substituted or unsubstituted cycloalkyl group having 1 to 30 carbon atoms, a substituted or unsubstituted alkenyl group having 1 to 30 carbon atoms, a substituted or unsubstituted alkenyloxy group having 1 to 30 carbon atoms, a substituted or unsubstituted alkynyl group having 1 to 30 carbon atoms, and a substituted or unsubstituted alkynyloxy group having 1 to 30 carbon atoms;

[0032] R2 contains a hydroxyl group;

[0033] L1, L2 and L3 are selected from -F, -Cl, -Br, -I, -CN, -NO2, -NCO, -NCS, -OCN, -SCN, a linear group having 1 to 5 carbon atoms, a branched group having 1 to 5 carbon atoms, an alkoxy group, an alkylcarbonyl group, an alkoxycarbonyl group, an alkylcarbonyloxy group, an alkoxycarbonyloxy group, and one or more -H in L1, L2 and L3 is unsubstituted or substituted by -F or -Cl;

[0034] Sp2 is selected from a spacer group or a single bond;

[0035] P2 is selected from polymerizable groups;

[0036] n is selected from 0, 1 or 2;

[0037] p1, p2 and p3 are selected from 1, 2 or 3;

[0038] r1, r2 and r3 are selected from 0, 1, 2 or 3.

[0039] In one embodiment of the present application, the liquid crystal compound includes at least one compound represented by formula (3), formula (4) and formula (5):

[0040]

[0041] in, is selected from a substituted or unsubstituted aromatic group having 6 to 50 carbon atoms, and a substituted or unsubstituted cycloalkyl group having 6 to 50 carbon atoms;

[0042] q, q1, t, t1, u and u1 are selected from -H, -F, -Cl, -Br, -CN, -SCN, -NCS, an alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, an alkenyloxy group having 2 to 10 carbon atoms, an alkynyl group having 2 to 10 carbon atoms, an alkynyloxy group having 2 to 10 carbon atoms, and an alkynyloxy group having 2 to 10 carbon atoms; the terminal groups of q, q1, t, t1, u and u1 are unsubstituted or substituted with one of CN and CF3; q, One or more -CH2- groups in q1, t, t1, u and u1 are not substituted or are substituted by -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O-, -OCH2-, -CH=CH-, -C≡C-, and the heteroatom is not directly bonded, and one or more H in q, q1, t, t1, u and u1 are not substituted or are substituted by F, Cl, Br, I;

[0043] M0 is selected from a single bond or -O-;

[0044] k is selected from 0, 1 or 2.

[0045] In one embodiment of the present application, the mass percentage of the first polymerizable compound in the liquid crystal composition is in a range of 0.01% to 1.50%.

[0046] According to the above-mentioned purpose of the present application, an embodiment of the present application further provides a display panel, which includes:

[0047] a first substrate;

[0048] a second substrate, arranged opposite to the first substrate;

[0049] a liquid crystal layer, disposed between the first substrate and the second substrate;

[0050] An alignment layer is at least arranged on a side of the first substrate close to the liquid crystal layer, and a material of the alignment layer includes the first polymerizable compound in the liquid crystal composition.

[0051] The embodiments of the present application provide a liquid crystal composition and a display panel. By adding a first polymerizable compound as shown in Formula I into the liquid crystal composition, since the electron cloud density of the first polymerizable compound is relatively small, the angular velocity of the liquid crystal composition during the alignment process can be reduced in the process of the alignment layer, thereby improving the illumination uniformity in the process of the alignment layer and improving the bright spot phenomenon.

[0052] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0054] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings, wherein the same figure numbers represent the same parts in the following description.

[0055] Figure 1 A schematic diagram of the structure of a display panel provided in an embodiment of the present application.

[0056] Description of reference numerals:

[0057] 11. First substrate; 12. Second substrate; 13. Liquid crystal layer; 14. Alignment layer; 141. First alignment layer; 142. Second alignment layer. DETAILED DESCRIPTION

[0058] The present application will be further described in detail below in conjunction with the accompanying drawings provided by the embodiments of the present application. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application. The description order of the following embodiments is not used as a limitation on the preferred order of the embodiments.

[0059] Unless otherwise defined, all terms (including technical and scientific terms) used in this document have the same meaning as commonly understood by one of ordinary skill in the art to which this general inventive concept belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and the present disclosure, and will not be interpreted in an idealized or overly formal sense unless clearly so defined herein.

[0060] In the present application, aromatic group, aromatic series and aromatic ring system have the same meaning and can be interchanged.

[0061] In the present application, heteroaromatic group, heteroaromatic series and heteroaromatic ring system have the same meaning and can be interchanged.

[0062] In the present application, "substituted" means that a hydrogen atom in a substituted group is replaced by a substituent.

[0063] In the present application, when the same substituent appears multiple times, it can be independently selected from the same or different groups. If the general formula contains multiple R, then R can be independently selected from different or the same groups.

[0064] In the present application, "substituted or unsubstituted" means that the defined group may be substituted or unsubstituted. When the defined group is substituted, it should be understood that the defined group may be substituted by one or more substituents R, wherein R is selected from but not limited to: deuterium atom, cyano group, isocyano group, nitro group or halogen (e.g., F, Cl, Br or I), alkyl group containing 1-20 carbon atoms, heterocyclic group containing 3-20 ring atoms, aromatic group containing 6-20 ring atoms, heteroaromatic group containing 5-20 ring atoms, -NR'R", silane group, carbonyl group, alkoxycarbonyl group, aryloxycarbonyl group, carbamoyl group, haloformyl group, formyl group, isocyanate group, thiocyanate group, isothiocyanate group, hydroxyl group, trifluoromethyl group, and the above groups may be further substituted by substituents acceptable in the art; it is understood that R' and R" in -NR'R" are independently selected from but not limited to: H, deuterium atom, cyano group, isocyanate group, isothiocyanate group, hydroxyl group, trifluoromethyl group. Cyano, nitro or halogen (such as F, Cl, Br or I), alkyl containing 1-10 carbon atoms, heterocyclic group containing 3-20 ring atoms, aromatic group containing 6-20 ring atoms, heteroaromatic group containing 5-20 ring atoms. Preferably, R is selected from but not limited to: deuterium atom, cyano, isocyano, nitro or halogen (such as F, Cl, Br or I), alkyl containing 1-10 carbon atoms, heterocyclic group containing 3-10 ring atoms, aromatic group containing 6-20 ring atoms, heteroaromatic group containing 5-20 ring atoms, silane group, carbonyl, alkoxycarbonyl, aryloxycarbonyl, carbamoyl, haloformyl, formyl, isocyanate, thiocyanate, isothiocyanate, hydroxyl, trifluoromethyl, and the above groups can also be further substituted by substituents acceptable in the art.

[0065] In the present application, "ring atoms" refers to the number of atoms in the atoms constituting the ring itself of a structural compound (e.g., a monocyclic compound, a condensed ring compound, a cross-linked compound, a carbocyclic compound, a heterocyclic compound) obtained by atoms bonding to form a ring. When the ring is substituted by a substituent, the atoms contained in the substituent are not included in the ring atoms. The same is true for the "ring atoms" described below, unless otherwise specified. For example, the number of ring atoms of a benzene ring is 6, the number of ring atoms of a naphthalene ring is 10, and the number of ring atoms of a thienyl group is 5.

[0066] In the present application, "aryl" or "aromatic group" refers to an aromatic hydrocarbon group whose ring atoms derived from an aromatic ring compound by removing a hydrogen atom are all carbon atoms. It can be a monocyclic aromatic group, a condensed aromatic group, or a polycyclic aromatic group. For a polycyclic ring, at least one is an aromatic ring system. For example, "substituted or unsubstituted aryl having 6 to 40 ring atoms" refers to an aryl group containing 6 to 40 ring atoms, preferably a substituted or unsubstituted aryl group having 6 to 30 ring atoms, more preferably a substituted or unsubstituted aryl group having 6 to 18 ring atoms, and particularly preferably a substituted or unsubstituted aryl group having 6 to 14 ring atoms, and the aryl group is optionally further substituted; suitable examples include, but are not limited to: phenyl, biphenyl, terphenyl, naphthyl, anthracenyl, phenanthrenyl, fluoranthenyl, triphenylene, pyrenyl, perylenyl, naphthyl, fluorenyl, acenaphthene and derivatives thereof. It is understood that multiple aromatic groups may also be interrupted by short non-aromatic units (for example, based on the total number of atoms in the system, the non-aromatic units preferably contain <10% non-H atoms, such as C, N or O atoms), specifically acenaphthene, fluorene, or 9,9-diarylfluorene, triarylamine, diaryl ether systems should also be included in the definition of aromatic groups.

[0067] In the present application, "heteroaryl" or "heteroaromatic group" means that at least one carbon atom on the ring skeleton is replaced by a non-carbon atom on the basis of the aryl, and the non-carbon atom can be an N atom, an O atom, an S atom, etc. That is, the ring atoms of the heteroaryl include one or more non-carbon atoms selected from N atoms, O atoms, and S atoms. For example, "substituted or unsubstituted heteroaryl with 5 to 40 ring atoms" refers to a heteroaryl with 5 to 40 ring atoms, preferably a substituted or unsubstituted heteroaryl with 6 to 30 ring atoms, more preferably a substituted or unsubstituted heteroaryl with 6 to 18 ring atoms, and particularly preferably a substituted or unsubstituted heteroaryl with 6 to 14 ring atoms, and the heteroaryl is optionally further substituted, and suitable examples include but are not limited to: thienyl, furanyl, pyrrolyl, imidazolyl, oxadiazolyl, triazolyl, pyridyl, bipyridyl, pyrimidyl, Triazine, acridinyl, pyridazinyl, pyrazinyl, quinolyl, isoquinolyl, quinazolinyl, quinoxalinyl, phthalazinyl, pyridopyrimidinyl, pyridopyrazinyl, benzothiophenyl, benzofuranyl, indolyl, pyrroloimidazolyl, pyrrolopyrrolyl, thienopyrrolyl, thienothiphenyl, furopyrrolyl, furofuranyl, thienofuranyl, benzisoxazolyl, benzisothiazolyl, benzimidazolyl, o-naphthyl, phenanthridinyl, furidinyl, quinazolinone, dibenzothiophenyl, dibenzofuranyl, carbazolyl and derivatives thereof.

[0068] In this application, "alkyl" may refer to a fully saturated straight chain, branched chain and / or cyclic aliphatic hydrocarbon group. The carbon number of the alkyl group may be 1 to 50, 1 to 30, 1 to 20, 1 to 10 or 1 to 6. Phrases containing this term, such as "C 1-9"Alkyl" refers to an alkyl group containing 1 to 9 carbon atoms, and each occurrence may be independently C1 alkyl, C2 alkyl, C3 alkyl, C4 alkyl, C5 alkyl, C6 alkyl, C7 alkyl, C8 alkyl or C9 alkyl. Non-limiting examples of alkyl groups include methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, tert-butyl, isobutyl, 2-ethylbutyl, 3,3-dimethylbutyl, n-pentyl, isopentyl, neopentyl, tert-pentyl, cyclopentyl, 1-methylpentyl, 3-methylpentyl, 2-ethylpentyl, 4-methyl-2-pentyl, n-hexyl, 1-methylhexyl, 2-ethylhexyl, 2-butylhexyl, cyclohexyl, 4-methylcyclohexyl, 4-tert-butylcyclohexyl, n-heptyl, 1-methylheptyl, 2,2-dimethylheptyl, 2-ethylheptyl, 2-butylheptyl, n-octyl, tert-octyl, 2-ethyloctyl, 2-butyloctyl, 2-hexyloctyl 2-Hexyldecyl, 2-octyldecyl, 2-undecyl, 2-ethyldecyl, 2-butyldecyl, 2-hexyldecyl, 2-octyldecyl, 2-undecyl, 2-ethyldodecyl, 2-butyldodecyl, 2-hexyldodecyl, 2-octyldodecyl, 2-tridecyl, 2-tetradecyl, 2-pentadecyl, 2-hexadecyl, 2-ethylhexadecyl, 2-butylhexadecyl, 2-hexylhexadecyl, 2-octylhexadecyl, 2-heptadecyl, 2-octylhexadecyl, 2-octadecyl, 2-octadecyl, 2-nonadecyl, 2-ethyleicosyl, 2-butyleicosyl, 2-hexyleicosyl, 2-octyleicosyl, 2-heneicosyl, 2-heneicosyl, 2-heconicosyl, 2-docosyl, 2-tricosyl, 2-tetracosyl, 2-pentacosyl, 2-hexacosyl, 2-heptacosyl, 2-octacosyl, 2-nonacosyl, 2-triacontyl, etc.

[0069] In the present application, the abbreviations of substituents correspond to: n-normal, sec-secondary, i-iso, t-tertiary, o-ortho, m-meta, p-para, Me-methyl, Et-ethyl, Pr-propyl, Bu-butyl, Am-n-pentyl, Hx-hexyl, Cy-cyclohexyl.

[0070] In the present application, "amino" refers to an amine derivative having the structural characteristics of the formula -N(X)2, wherein each "X" is independently H, substituted or unsubstituted alkyl, substituted or unsubstituted cycloalkyl, substituted or unsubstituted heterocyclyl, etc. Non-limiting types of amines include -NH2, -N(alkyl)2, -NH(alkyl), -N(cycloalkyl)2, -NH(cycloalkyl), -N(heterocyclyl), -NH(heterocyclyl), -N(aryl), -NH(aryl), -N(alkyl)(aryl), -N(alkyl)(heterocyclyl), -N(cycloalkyl)(heterocyclyl), -N(aryl)(heteroaryl), -N(alkyl)(heteroaryl), etc.

[0071] Herein, the term "cycloalkyl" or "cyclic alkyl" refers to a monovalent group having one or more saturated rings in which all ring members are carbon, wherein the term "alkyl" has the same meaning as described above.

[0072] In the present application, the term "heterocyclyl", "heterocyclic" or "heterocycle" refers to a fully saturated or partially unsaturated, but non-aromatic cyclic group having one or more oxygen, sulfur, silicon or nitrogen heteroatoms in the ring, the nitrogen and sulfur heteroatoms may be optionally oxidized and the nitrogen heteroatom may be optionally quaternized. The heterocyclic group may be attached at any atom or carbon atom of the ring or ring system and may be unsubstituted or substituted with one or more moieties as described above for the aryl group.

[0073] In the present application, unless otherwise defined, hydroxyl refers to -OH, carboxyl refers to -COOH, carbonyl refers to -C(=O)-, amino refers to -NH2, formyl refers to -C(=O)H, haloformyl refers to -C(=O)Z (wherein Z represents a halogen (e.g., F, Cl, Br or I)), carbamoyl refers to -C(=O)NH2, isocyanate refers to -NCO, and isothiocyanate refers to -NCS.

[0074] In the present application, the term "alkoxy" refers to a group having a structure of "-O-alkyl", i.e., an alkyl group as defined above is connected to other groups via an oxygen atom. Phrases containing the term, suitable examples include, but are not limited to, methoxy (-O-CH3 or -OMe), ethoxy (-O-CH2CH3 or -OEt) and tert-butoxy (-OC(CH3)3 or -OtBu).

[0075] In the present application, "*" connected to a single bond indicates a connection or fusion site.

[0076] In the present application, when a linking site is not specified in a group, it means that an optional linking site in the group can be used as a linking site.

[0077] In the present application, when the fusion site is not specified in the group, it means that any fusion site in the group can be used as the fusion site, and preferably two or more sites in the ortho position in the group are fusion sites.

[0078] In the present application, when a group contains multiple substituents with the same symbol, the substituents may be the same or different from each other, for example The six Rs on the benzene ring may be the same as or different from each other.

[0079] In the present application, the single bond to which the substituent is connected runs through the corresponding ring, indicating that the substituent can be connected to any position of the ring, for example In which R is connected to any substitutable position of the benzene ring; express Can be used with The benzene ring can be fused at any position.

[0080] The cyclic alkyl group or cycloalkyl group described in the present application have the same meaning and can be interchanged.

[0081] In the present application, "adjacent groups" means that there is no substitutable site between two substituents.

[0082] In the present application, "two adjacent R1 or two adjacent R3 or two adjacent R5 form a ring with each other" means a ring system formed by two adjacent R1 or two adjacent R3 or two adjacent R5 connected to each other, and the ring system can be selected from aliphatic hydrocarbon ring, aliphatic heterocycle, aromatic hydrocarbon ring or aromatic heterocycle. Preferably,

[0083] The embodiment of the present application provides a liquid crystal composition, which includes a liquid crystal compound and a first polymerizable compound, wherein the chemical structure of the first polymerizable compound is as shown in Formula I:

[0084]

[0085] in, is selected from substituted or unsubstituted aromatic groups having 6 to 50 carbon atoms;

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

[0087] P is selected from polymerizable groups;

[0088] R is selected from -H, -F, -Cl, -Br, -CN, -SCN, -NCS, a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 10 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 10 carbon atoms, a substituted or unsubstituted alkenyloxy group having 2 to 10 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 10 carbon atoms, and a substituted or unsubstituted alkynyloxy group having 2 to 10 carbon atoms, wherein the terminal group of R is unsubstituted or substituted by one of -CN and -CF3, and one or more -H in R is unsubstituted or substituted by one of -F, -Cl, -Br and -I.

[0089] In the implementation process, the embodiment of the present application adds the first polymerizable compound as shown in Formula I to the liquid crystal composition. Since the electron cloud density of the first polymerizable compound is relatively small, the angular velocity of the liquid crystal composition during the alignment process can be reduced in the process of the alignment layer, thereby improving the uniformity of light illumination in the process of the alignment layer and improving the bright spot phenomenon. In addition, the first polymerizable compound contains The structure can effectively enhance the rigidity of the first polymerizable compound, thereby improving the angular stability of the alignment layer formed by the liquid crystal composition.

[0090] Specifically, in some embodiments, is selected from substituted or unsubstituted phenyl, When replaced, Any of the above -H is substituted by -F, -Cl, -Br, an alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, an alkenyloxy group having 2 to 10 carbon atoms, an alkynyl group having 2 to 10 carbon atoms, or an alkynyloxy group having 2 to 10 carbon atoms.

[0091] In some embodiments, Sp-P is selected from substituted or unsubstituted alkenyl-containing ester groups having 3 to 35 carbon atoms.

[0092] In some embodiments, Sp-P is selected from the group shown in Formula II or Formula III:

[0093]

[0094] Wherein, Z is selected from a single bond, -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O-, -OCH2-, -CH=CH-, a substituted or unsubstituted alkylene group having 1 to 10 carbon atoms, a substituted or unsubstituted alkenylene group having 2 to 10 carbon atoms, and a substituted or unsubstituted alkynyl group having 2 to 10 carbon atoms, and one or more -H in Z is unsubstituted or substituted by -F, -Cl, -Br, or -I.

[0095] In some embodiments, a is selected from any integer between 0 and 10.

[0096] In some embodiments, when Z is selected from a substituted or unsubstituted alkylene having 1 to 10 carbon atoms, a substituted or unsubstituted alkenylene having 2 to 10 carbon atoms, or a substituted or unsubstituted alkynyl having 2 to 10 carbon atoms, any non-adjacent -CH2- in Z is unsubstituted or substituted by -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O-, -OCH2-, -CH=CH-, or -C≡C-.

[0097] In some embodiments, when R is selected from a substituted or unsubstituted alkyl having 1 to 10 carbon atoms, a substituted or unsubstituted alkoxy having 1 to 10 carbon atoms, a substituted or unsubstituted alkenyl having 2 to 10 carbon atoms, a substituted or unsubstituted alkenyloxy having 2 to 10 carbon atoms, a substituted or unsubstituted alkynyl having 2 to 10 carbon atoms, and a substituted or unsubstituted alkynyloxy having 2 to 10 carbon atoms, one or more CH2 in R is unsubstituted or replaced by -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O-, -OCH2-, -CH=CH-, or -C≡C-, and the heteroatom is not directly bonded.

[0098] In some embodiments, Sp-P is selected from Among them, "*" is the connection site.

[0099] In some embodiments, Selected from phenyl.

[0100] In some embodiments, R is selected from methyl.

[0101] In some embodiments, the chemical formula of the first polymerizable compound is selected from any one of the following Formula I-1 to Formula I-9:

[0102]

[0103] In some embodiments, the liquid crystal composition further includes a second polymerizable compound, and the chemical structure of the second polymerizable compound is shown in Formula (1):

[0104]

[0105] It should be noted that the second polymerizable compound is a conventional polymerizable compound. The first polymerizable compound provided in the embodiment of the present application has a smaller electron cloud density than the second polymerizable compound, and thus the first polymerizable compound can reduce the angular velocity of the liquid crystal composition during the alignment process. Therefore, the embodiment of the present application adds the first polymerizable compound and the second polymerizable compound to the liquid crystal composition at the same time, and the desired angular velocity can be obtained by adjusting the ratio of the two, thereby improving the applicability of the liquid crystal composition.

[0106] in, It is selected from a substituted or unsubstituted aromatic group having 6 to 60 carbon atoms, a substituted or unsubstituted heteroaryl group having 5 to 60 carbon atoms, a substituted or unsubstituted alicyclic group having 6 to 60 carbon atoms, a substituted or unsubstituted heterocyclic group having 5 to 60 carbon atoms, and a substituted or unsubstituted condensed ring group having 5 to 60 carbon atoms.

[0107] Sp1 is selected from a spacer group or a single bond;

[0108] P1 is selected from polymerizable groups;

[0109] b is selected from 0, 1, 2, 3 or 4.

[0110] In some embodiments, Any of the above H groups is unsubstituted or substituted by F, Cl, Br, CN, SCN, NCS, Sp-P, an alkyl or alkoxy group having 1 to 10 carbon atoms, an alkenyl or alkenyloxy group having 2 to 10 carbon atoms, or an alkynyl or alkynyloxy group having 2 to 10 carbon atoms.

[0111] In some embodiments, Sp1-P1 is selected from a substituted or unsubstituted alkenyl-containing ester group having 3 to 35 carbon atoms.

[0112] In some embodiments, Sp1-P1 can be selected to be the same group as Sp-P, or a different group.

[0113] In some embodiments, Sp1-P1 can be selected from or Among them, "*" is the connection site.

[0114] In some embodiments, the liquid crystal composition further comprises a self-aligning compound, and the chemical structure of the self-aligning compound is shown in Formula (2):

[0115]

[0116] It is understandable that the liquid crystal composition provided in the embodiment of the present application contains the self-alignment compound represented by formula (2), thereby realizing a self-alignment process of the alignment layer, saving process steps and reducing process costs.

[0117] in, The group is selected from a substituted or unsubstituted cycloalkyl group having 3 to 30 carbon atoms, a substituted or unsubstituted heterocycloalkyl group having 2 to 30 carbon atoms, a substituted or unsubstituted aromatic group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaromatic group having 4 to 30 carbon atoms, and a substituted or unsubstituted condensed ring group having 4 to 30 carbon atoms.

[0118] In some embodiments, Selected from

[0119] One or more H atoms in is unsubstituted or substituted by L0.

[0120] In some embodiments, Selected from

[0121] One or more H atoms in is unsubstituted or substituted by L0.

[0122] In some embodiments, L0 is selected from -F, -Cl, -Br, -I, -CN, -NO2, -NCO, -NCS, -OCN, -SCN, a straight chain having 1 to 5 C atoms, a branched alkyl having 1 to 5 C atoms, an alkoxy, an alkylcarbonyl, an alkoxycarbonyl, an alkylcarbonyloxy, or an alkoxycarbonyloxy, and one or more H atoms in L0 are unsubstituted or substituted by one of F and Cl.

[0123] Z1, Z2 and Z3 are selected from a single bond, -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O-, -OCH2-, -CH=CH-, an alkylene group having 1-10 carbon atoms, an alkenylene group having 2-10 carbon atoms, and an alkynyl group having 2-10 carbon atoms. Any non-adjacent -CH2- group in Z1, Z2 and Z3 is unsubstituted or substituted by -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O-, -OCH2-, -CH=CH-, or -C≡C-. One or more -H in Z1, Z2 and Z3 is unsubstituted or substituted by -F, -Cl, -Br, or -I.

[0124] R1 is selected from a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 30 carbon atoms, a substituted or unsubstituted cycloalkyl group having 1 to 30 carbon atoms, a substituted or unsubstituted alkenyl group having 1 to 30 carbon atoms, a substituted or unsubstituted alkenyloxy group having 1 to 30 carbon atoms, a substituted or unsubstituted alkynyl group having 1 to 30 carbon atoms, and a substituted or unsubstituted alkynyloxy group having 1 to 30 carbon atoms.

[0125] In some embodiments, one or more CH2 groups in R1 can allow the O atoms to be independently connected to each other in a manner that is not directly connected to each other, such as -CH=CH-, -C≡C-, -CF2O-, The R1 may be substituted by -CO-, -C(O)O-, -OC(O)-, or -O-, and one or more H atoms in R1 may be substituted by halogen.

[0126] In some embodiments, R1 is selected from alkyl, alkoxy, cycloalkyl, alkenyl, alkenyloxy, alkynyl, alkynyloxy, Furthermore, one or more CH2 groups in R1 can make the O atoms independently connected to each other by -CH=CH-, -C≡C-, -CF2O-, The R1 may be substituted by -CO-, -C(O)O-, -OC(O)-, or -O-, and one or more H atoms in R1 may be substituted by halogen.

[0127] R2 contains a hydroxyl group and serves as an anchor.

[0128] L1, L2 and L3 are selected from -F, -Cl, -Br, -I, -CN, -NO2, -NCO, -NCS, -OCN, -SCN, a straight chain having 1 to 5 carbon atoms, a branched chain alkyl having 1 to 5 carbon atoms, an alkoxy group, an alkylcarbonyl group, an alkoxycarbonyl group, an alkylcarbonyloxy group, an alkoxycarbonyloxy group, and one or more -H in L1, L2 and L3 is unsubstituted or substituted by one of -F and -Cl.

[0129] Sp2 is selected from a spacer group or a single bond, and P2 is selected from a polymerizable group.

[0130] It can be understood that Sp, Sp1 and Sp2 can be the same spacer group or different spacer groups. Similarly, P, P1 and P2 can be the same polymerizable group or different polymerizable groups.

[0131] In some embodiments, Sp2-P2 is selected from a substituted or unsubstituted alkenyl-containing ester group having 3 to 35 carbon atoms.

[0132] In some embodiments, Sp2-P2 can be selected to be the same group as Sp-P, or a different group.

[0133] In some embodiments, n is selected from 0, 1 or 2.

[0134] In some embodiments, p1, p2 and p3 are selected from 1, 2 or 3.

[0135] In some embodiments, r1, r2 and r3 are selected from 0, 1, 2 or 3.

[0136] In some embodiments, the liquid crystal compound includes at least one of the compounds represented by formula (3), formula (4) and formula (5):

[0137]

[0138]

[0139] in, It is selected from a substituted or unsubstituted aromatic group having 6 to 50 carbon atoms and a substituted or unsubstituted cycloalkyl group having 6 to 50 carbon atoms.

[0140] In some embodiments, Selected from Any -H on the ring is unsubstituted or replaced by -F, -Cl, -Br, -CN, -SCN, -NCS, alkyl having 1-10 carbon atoms, alkoxy having 1-10 carbon atoms, alkenyl having 2-10 carbon atoms, alkenyloxy having 2-10 carbon atoms, alkynyl having 2-10 carbon atoms, or alkynyloxy having 2-10 carbon atoms.

[0141] q, q1, t, t1, u and u1 are selected from -H, -F, -Cl, -Br, -CN, -SCN, -NCS, an alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, an alkenyloxy group having 2 to 10 carbon atoms, an alkynyl group having 2 to 10 carbon atoms, an alkynyloxy group having 2 to 10 carbon atoms, and an alkynyloxy group having 2 to 10 carbon atoms; the terminal groups of q, q1, t, t1, u and u1 are unsubstituted or substituted with one of CN and CF3; q, One or more -CH2- groups in q1, t, t1, u and u1 are unsubstituted or replaced by -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O-, -OCH2-, -CH=CH-, -C≡C-, and the heteroatom is not directly bonded, and one or more H in q, q1, t, t1, u and u1 are unsubstituted or replaced by F, Cl, Br, I.

[0142] M0 is selected from a single bond or -O-;

[0143] k is selected from 0, 1 or 2.

[0144] In some embodiments, the mass proportion of the first polymerizable compound in the liquid crystal composition ranges from 0.01% to 1.50%. For example, the mass proportion of the first polymerizable compound in the liquid crystal composition can be 0.01%, 0.05%, 0.1%, 0.15%, 0.2%, 0.25%, 0.3%, 0.35%, 0.4%, 0.45%, 0.5%, 0.55%, 0.6%, 0.65%, 0.7%, 0.75%, 0.8%, 0.85%, 0.9%, 0.95%, 1%, 1.05%, 1.1%, 1.15%, 1.2%, 1.25%, 1.3%, 1.35%, 1.4%, 1.45% or 1.5%.

[0145] In some embodiments, the liquid crystal material in the liquid crystal composition provided in the embodiments of the present application has negative dielectric anisotropy and can be applied to liquid crystal displays in modes such as vertical alignment (VA), polymer sustained alignment (PSA), polymer stabilized vertical alignment (PS-VA), patterned vertical alignment (PVA) or multi-domain vertical alignment (MVA).

[0146] In some embodiments, the first polymerizable compound may be selected from at least one of the following compounds:

[0147]

[0148] In some embodiments, the second polymerizable compound may be selected from at least one of the following compounds:

[0149]

[0150] In some embodiments, the self-aligning compound can be selected from:

[0151]

[0152] In addition, the embodiments of the present application also provide a preparation process of the first polymerizable compound, the second polymerizable compound and the self-alignment compound.

[0153] Specifically, the first polymerizable compound The synthesis process is:

[0154]

[0155] Among them, the MS of the product: [M+H] + =479.2, confirmed as the target product. The first polymerizable compound The synthesis process is:

[0156]

[0157] Among them, the MS of the product: [M+H] + =479.2, confirmed as the target product.

[0158] Self-aligning compounds The synthesis process is:

[0159]

[0160]

[0161] Among them, the MS of the product: [M+H] + =835.5, confirmed as the target product.

[0162] In the embodiment of the present application, by adding the first polymerizable compound as shown in Formula I to the liquid crystal composition, since the electron cloud density of the first polymerizable compound is relatively small, the angular velocity of the liquid crystal composition during the alignment process can be reduced in the process of manufacturing the alignment layer, thereby improving the illumination uniformity in the process of manufacturing the alignment layer and improving the bright spot phenomenon; in addition, the first polymerizable compound contains The structure can effectively enhance the rigidity of the first polymerizable compound, thereby improving the angular stability of the alignment layer formed by the liquid crystal composition.

[0163] In addition, an embodiment of the present application further provides a display panel, which includes a first substrate 11 , a second substrate 12 , a liquid crystal layer 13 and an alignment layer 14 .

[0164] The first substrate 11 and the second substrate 12 are arranged opposite to each other, the liquid crystal layer 13 is located between the first substrate 11 and the second substrate 12 , and the alignment layer 14 is at least arranged on one side of the first substrate 11 close to the liquid crystal layer 13 .

[0165] In the embodiment of the present application, the material of the alignment layer 14 includes the first polymerizable compound in the liquid crystal composition described in the above embodiment.

[0166] In some embodiments, the alignment layer 14 includes a first alignment layer 141 disposed on a side of the first substrate 11 close to the liquid crystal layer 13 and a second alignment layer 142 disposed on a side of the second substrate 12 close to the liquid crystal layer 13 .

[0167] In some embodiments, the liquid crystal layer 13 is formed by a liquid crystal compound in the above liquid crystal compound, and the alignment layer 14 is formed by polymerizing a first polymerizable compound, a second polymerizable compound, and a self-alignment compound in the above liquid crystal composition.

[0168] In some embodiments, the display panel may be in any of VA, PSA, PS-VA, PVA or MVA modes.

[0169] In some embodiments, the first substrate 11 is an opposing substrate (or a color filter substrate), and the second substrate 12 is an array substrate.

[0170] Specifically, the display panel also includes an electrode group formed on one or both of the first substrate 11 and the second substrate 12 , a plurality of active elements (such as thin film transistors) located in the second substrate 12 , and a color filter layer located on the first substrate 11 or the second substrate 12 .

[0171] In a specific embodiment, the electrode group includes pixel electrodes located on the second substrate 12 and common electrodes located on the first substrate 11 and / or the second substrate 12 .

[0172] In a specific embodiment, the color film layer includes red (R) color resist, green (G) color resist and blue (B) color resist distributed in an array; wherein the red color resist contains diketopyrrolopyrrole or other organic pigment compounds, the proportion of water-soluble pigments contained in the red color resist is not higher than 1.5%, and 90% of the pigment particles have a particle size range of 0-100nm.

[0173] For example, the particle size of the pigment particles in the red color resist may be 10 nm, 20 nm, 30 nm, 40 nm, 50 nm, 60 nm, 70 nm, 80 nm, 90 nm or 100 nm, but is not limited thereto.

[0174] It can be understood that the smaller the particle size of the pigment particles in the red color resist, the more conducive it is to uniform distribution of the pigment, thereby helping to improve the product's penetration, reliability and color gamut.

[0175] In other embodiments of the present application, the liquid crystal composition provided in the above embodiments does not contain a self-alignment compound, and the alignment layer 14 in the display panel can be formed by using an alignment compound, a first polymerizable compound and a second polymerizable compound. For example, the alignment compound can be a polyimide monomer.

[0176] In the embodiment of the present application, by adding the first polymerizable compound as shown in Formula I to the liquid crystal composition, since the electron cloud density of the first polymerizable compound is relatively small, the angular velocity of the liquid crystal composition during the alignment process can be reduced in the process of manufacturing the alignment layer, thereby improving the uniformity of illumination in the process of manufacturing the alignment layer and improving the bright spot phenomenon of the display panel; in addition, the first polymerizable compound contains The structure can effectively enhance the rigidity of the first polymerizable compound, thereby improving the angular stability of the alignment layer formed by the liquid crystal composition.

[0177] Furthermore, the embodiments of the present application provide embodiments 1 to 3, and a comparative example to verify the performance of the liquid crystal composition provided in the embodiments of the present application.

[0178] Among them, in Examples 1 to 3 and the comparative example, the preparation process of the liquid crystal composition includes:

[0179] 1. Weigh the components of the liquid crystal composition by mass percentage using a balance and mix them. There is no specific requirement for the order of weighing and adding. For example, the components of the liquid crystal composition can be weighed and mixed in order from low to high melting points;

[0180] 2. Heat and stir at 60-100℃ to fully dissolve and mix the components;

[0181] 3. Cool to room temperature and encapsulate to obtain the target sample.

[0182] Specifically, as shown in Table 1 below, the liquid crystal composition provided in the comparative example contains a second polymerizable compound and a liquid crystal compound.

[0183] Table 1 Component distribution and performance parameters of the liquid crystal composition of the comparative example

[0184]

[0185] Among them, the first compound to the twelfth compound are liquid crystal components, the liquid crystal components may include liquid crystal compounds, and the sum of the mass percentages of the first compound to the twelfth compound in the liquid crystal component is 100%; the thirteenth compound is the second polymerizable compound, and the mass percentage of the liquid crystal component is 99.7%, and the mass percentage of the thirteenth compound is 0.3%.

[0186] As shown in Table 2 below, the liquid crystal composition provided in Example 1 contains a first polymerizable compound and a liquid crystal compound.

[0187] Table 2 Component distribution and performance parameters of the liquid crystal composition of Example 1

[0188]

[0189] Among them, the first compound to the twelfth compound are liquid crystal components, the liquid crystal components may include liquid crystal compounds, and the sum of the mass percentages of the first compound to the twelfth compound in the liquid crystal component is 100%; the thirteenth compound is the first polymerizable compound, and the mass percentage of the liquid crystal component is 99.7%, and the mass percentage of the thirteenth compound is 0.3%.

[0190] As shown in Table 3 below, the liquid crystal composition provided in Example 2 contains a first polymerizable compound and a liquid crystal compound.

[0191] Table 3 Component distribution and performance parameters of the liquid crystal composition of Example 2

[0192]

[0193] Among them, the first compound to the twelfth compound are liquid crystal components, the liquid crystal components may include liquid crystal compounds, and the sum of the mass percentages of the first compound to the twelfth compound in the liquid crystal component is 100%; the thirteenth compound is the second polymerizable compound, and the fourteenth compound is the first polymerizable compound, and the mass percentage of the liquid crystal component is 99.6%, the mass percentage of the thirteenth compound is 0.3%, and the mass percentage of the fourteenth compound is 0.1%.

[0194] As shown in Table 4 below, the liquid crystal composition provided in Example 3 contains a first polymerizable compound and a liquid crystal compound.

[0195] Table 4 Component distribution and performance parameters of the liquid crystal composition of Example 3

[0196]

[0197] Among them, the first compound to the fifteenth compound are the first liquid crystal component, the first liquid crystal component may include a liquid crystal compound, and the sum of the mass percentages of the first compound to the fifteenth compound in the liquid crystal component is 100%; the sixteenth compound is the second polymerizable compound, the seventeenth compound is the first polymerizable compound, and the eighteenth compound is the second polymerizable compound, and the mass percentage of the first liquid crystal component is 99.5%, the mass percentage of the sixteenth compound is 0.2%, the mass percentage of the seventeenth compound is 0.2%, and the mass percentage of the eighteenth compound is 0.1%.

[0198] Furthermore, the nineteenth compound is a self-aligning compound, the first compound to the eighteenth compound are second liquid crystal components, and the second liquid crystal component is mixed at a mass percentage of 99.1% and a mass percentage of 0.9% for the nineteenth compound.

[0199] In the above comparative examples and Examples 1 to 3, the temperature unit is ℃; Tni represents the clearing point of the liquid crystal composition (unit: ℃); Δn represents the optical anisotropy at 25℃, ne is the refractive index of 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 molecules.

[0200] As mentioned above, the first polymerizable compound is not added in the comparative example, while the first polymerizable compound is added in Examples 1 to 3, and the angle-forming rates of the liquid crystal compositions in Examples 1 to 3 are significantly greater than the angle-forming rates in the comparative example, indicating that the first polymerizable compound provided in the examples of the present application can effectively reduce the angle-forming rate of the liquid crystal composition during the alignment process; further, Example 1 includes the first polymerizable compound, and Example 2 includes the first polymerizable compound and the second polymerizable compound, and the angle-forming rate of the liquid crystal composition in Example 2 is less than the angle-forming rate in Example 1, indicating that in the examples of the present application, the angle-forming rate of the liquid crystal composition during the alignment process can be regulated by simultaneously adding the first polymerizable compound and the second polymerizable compound to the liquid crystal composition to achieve a preset angle-forming rate; in Example 3, by adding the self-alignment compound, the manufacturing process of the PI alignment layer can be saved, which is beneficial to saving materials and manufacturing costs, shortening the panel process time, and can also save the process illumination time in the subsequent vertical alignment stage.

[0201] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0202] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0203] The embodiments, implementation methods and related technical features of the present application can be combined and replaced with each other without conflict.

[0204] The above are only preferred embodiments of the present application and do not constitute any form of limitation to the present application. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. A liquid crystal composition, characterized in that: The liquid crystal composition comprises a liquid crystal compound and a first polymerizable compound, wherein the chemical structural formula of the first polymerizable compound is as shown in Formula I: in, is selected from substituted or unsubstituted aromatic groups having 6 to 50 carbon atoms; Sp is selected from a spacer group or a single bond; P is selected from polymerizable groups; R is selected from -H, -F, -Cl, -Br, -CN, -SCN, -NCS, a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 10 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 10 carbon atoms, a substituted or unsubstituted alkenyloxy group having 2 to 10 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 10 carbon atoms, and a substituted or unsubstituted alkynyloxy group having 2 to 10 carbon atoms, wherein the terminal group of R is unsubstituted or substituted with one of -CN and -CF3, and one or more -H in R is unsubstituted or substituted with one of -F, -Cl, -Br, and -I.

2. The liquid crystal composition according to claim 1, characterized in that: is selected from substituted or unsubstituted phenyl, When replaced, Any of the above -H is substituted by -F, -Cl, -Br, an alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, an alkenyloxy group having 2 to 10 carbon atoms, an alkynyl group having 2 to 10 carbon atoms, or an alkynyloxy group having 2 to 10 carbon atoms.

3. The liquid crystal composition according to claim 1, characterized in that: Sp-P is selected from the group shown in formula II or formula III: Wherein, Z is selected from a single bond, -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O-, -OCH2-, -CH=CH-, a substituted or unsubstituted alkylene group having 1 to 10 carbon atoms, a substituted or unsubstituted alkenylene group having 2 to 10 carbon atoms, and a substituted or unsubstituted alkynyl group having 2 to 10 carbon atoms, and one or more -H in Z is unsubstituted or substituted by -F, -Cl, -Br, or -I; a is selected from any integer between 0 and 10.

4. The liquid crystal composition according to claim 3, characterized in that: When Z is selected from a substituted or unsubstituted alkylene group having 1 to 10 carbon atoms, a substituted or unsubstituted alkenylene group having 2 to 10 carbon atoms, or a substituted or unsubstituted alkynyl group having 2 to 10 carbon atoms, any non-adjacent -CH2- in Z is unsubstituted or substituted by -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O-, -OCH2-, -CH=CH-, or -C≡C-.

5. The liquid crystal composition according to claim 1, characterized in that: When R is selected from a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 10 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 10 carbon atoms, a substituted or unsubstituted alkenyloxy group having 2 to 10 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 10 carbon atoms, and a substituted or unsubstituted alkynyloxy group having 2 to 10 carbon atoms, one or more CH2 in R is unsubstituted or substituted by -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O-, -OCH2-, -CH=CH-, or -C≡C-, and the heteroatom is not directly bonded.

6. The liquid crystal composition according to any one of claims 1 to 5, characterized in that: The chemical structural formula of the first polymerizable compound is selected from any one of the following formulas I-1 to I-9:

7. The liquid crystal composition according to claim 1, characterized in that: The liquid crystal composition further includes a second polymerizable compound, and the chemical structural formula of the second polymerizable compound is shown in Formula (1): in, A substituted or unsubstituted aromatic group having 6 to 60 carbon atoms, a substituted or unsubstituted heteroaryl group having 5 to 60 carbon atoms, a substituted or unsubstituted alicyclic group having 6 to 60 carbon atoms, a substituted or unsubstituted heterocyclic group having 5 to 60 carbon atoms, and a substituted or unsubstituted condensed ring group having 5 to 60 carbon atoms; Sp1 is selected from a spacer group or a single bond; P1 is selected from polymerizable groups; b is selected from 0, 1, 2, 3 or 4.

8. The liquid crystal composition according to claim 1, characterized in that: The liquid crystal composition further comprises a self-aligning compound, and the chemical structure of the self-aligning compound is shown in formula (2): in, A substituted or unsubstituted cycloalkyl group having 3 to 30 carbon atoms, a substituted or unsubstituted heterocycloalkyl group having 2 to 30 carbon atoms, a substituted or unsubstituted aromatic group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaromatic group having 4 to 30 carbon atoms, and a substituted or unsubstituted condensed ring group having 4 to 30 carbon atoms; Z1, Z2 and Z3 are selected from a single bond, -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O-, -OCH2-, -CH=CH-, an alkylene group having 1 to 10 carbon atoms, an alkenylene group having 2 to 10 carbon atoms, and an alkynyl group having 2 to 10 carbon atoms; any non-adjacent -CH2- group in Z1, Z2 and Z3 is unsubstituted or substituted with -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O-, -OCH2-, -CH=CH-, or -C≡C-; one or more -H in Z1, Z2 and Z3 is unsubstituted or substituted with -F, -Cl, -Br, or -I; R1 is selected from a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 30 carbon atoms, a substituted or unsubstituted cycloalkyl group having 1 to 30 carbon atoms, a substituted or unsubstituted alkenyl group having 1 to 30 carbon atoms, a substituted or unsubstituted alkenyloxy group having 1 to 30 carbon atoms, a substituted or unsubstituted alkynyl group having 1 to 30 carbon atoms, and a substituted or unsubstituted alkynyloxy group having 1 to 30 carbon atoms; R2 contains a hydroxyl group; L1, L2 and L3 are selected from -F, -Cl, -Br, -I, -CN, -NO2, -NCO, -NCS, -OCN, -SCN, a linear group having 1 to 5 carbon atoms, a branched group having 1 to 5 carbon atoms, an alkoxy group, an alkylcarbonyl group, an alkoxycarbonyl group, an alkylcarbonyloxy group, an alkoxycarbonyloxy group, and one or more -H in L1, L2 and L3 is unsubstituted or substituted by -F or -Cl; Sp2 is selected from a spacer group or a single bond; P2 is selected from polymerizable groups; n is selected from 0, 1 or 2; p1, p2 and p3 are selected from 1, 2 or 3; r1, r2 and r3 are selected from 0, 1, 2 or 3.

9. The liquid crystal composition according to claim 1, characterized in that: The liquid crystal compound includes at least one of the compounds represented by formula (3), formula (4) and formula (5): in, is selected from a substituted or unsubstituted aromatic group having 6 to 50 carbon atoms, and a substituted or unsubstituted cycloalkyl group having 6 to 50 carbon atoms; q, q1, t, t1, u and u1 are selected from -H, -F, -Cl, -Br, -CN, -SCN, -NCS, an alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, an alkenyloxy group having 2 to 10 carbon atoms, an alkynyl group having 2 to 10 carbon atoms, an alkynyloxy group having 2 to 10 carbon atoms, and an alkynyloxy group having 2 to 10 carbon atoms; the terminal groups of q, q1, t, t1, u and u1 are unsubstituted or substituted with one of CN and CF3; q, One or more -CH2- groups in q1, t, t1, u and u1 are not substituted or are substituted by -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O-, -OCH2-, -CH=CH-, -C≡C-, and the heteroatom is not directly bonded, and one or more H in q, q1, t, t1, u and u1 are not substituted or are substituted by F, Cl, Br, I; M0 is selected from a single bond or -O-; k is selected from 0, 1 or 2.

10. The liquid crystal composition according to claim 1, characterized in that: The mass percentage of the first polymerizable compound in the liquid crystal composition is in a range of 0.01% to 1.50%.

11. A display panel, characterized in that: include: a first substrate; a second substrate, arranged opposite to the first substrate; a liquid crystal layer, disposed between the first substrate and the second substrate; An alignment layer is at least arranged on a side of the first substrate close to the liquid crystal layer, and a material of the alignment layer includes the first polymerizable compound in the liquid crystal composition according to any one of claims 1 to 10.

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