CN117511563A - Liquid crystal composition and display panel - Google Patents
Liquid crystal composition and display panel Download PDFInfo
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- CN117511563A CN117511563A CN202310158147.2A CN202310158147A CN117511563A CN 117511563 A CN117511563 A CN 117511563A CN 202310158147 A CN202310158147 A CN 202310158147A CN 117511563 A CN117511563 A CN 117511563A
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 144
- 239000000203 mixture Substances 0.000 title claims abstract description 126
- 150000001875 compounds Chemical class 0.000 claims abstract description 101
- 125000004432 carbon atom Chemical group C* 0.000 claims description 68
- 239000000758 substrate Substances 0.000 claims description 33
- 125000000217 alkyl group Chemical group 0.000 claims description 20
- 125000003342 alkenyl group Chemical group 0.000 claims description 19
- 125000000304 alkynyl group Chemical group 0.000 claims description 18
- 125000004429 atom Chemical group 0.000 claims description 16
- 125000003302 alkenyloxy group Chemical group 0.000 claims description 11
- 125000005133 alkynyloxy group Chemical group 0.000 claims description 11
- 125000003545 alkoxy group Chemical group 0.000 claims description 10
- 238000006467 substitution reaction Methods 0.000 claims description 6
- 125000005842 heteroatom Chemical group 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 9
- -1 ding Ji Chemical group 0.000 description 43
- 230000003287 optical effect Effects 0.000 description 9
- 239000013078 crystal Substances 0.000 description 6
- 238000001556 precipitation Methods 0.000 description 6
- 238000002834 transmittance Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 238000005452 bending Methods 0.000 description 4
- 125000004975 3-butenyl group Chemical group C(CC=C)* 0.000 description 2
- 125000000474 3-butynyl group Chemical group [H]C#CC([H])([H])C([H])([H])* 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000011203 carbon fibre reinforced carbon Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 125000001424 substituent group Chemical group 0.000 description 2
- 125000004973 1-butenyl group Chemical group C(=CCC)* 0.000 description 1
- 125000004972 1-butynyl group Chemical group [H]C([H])([H])C([H])([H])C#C* 0.000 description 1
- 125000004974 2-butenyl group Chemical group C(C=CC)* 0.000 description 1
- 125000000069 2-butynyl group Chemical group [H]C([H])([H])C#CC([H])([H])* 0.000 description 1
- HBAQYPYDRFILMT-UHFFFAOYSA-N 8-[3-(1-cyclopropylpyrazol-4-yl)-1H-pyrazolo[4,3-d]pyrimidin-5-yl]-3-methyl-3,8-diazabicyclo[3.2.1]octan-2-one Chemical class C1(CC1)N1N=CC(=C1)C1=NNC2=C1N=C(N=C2)N1C2C(N(CC1CC2)C)=O HBAQYPYDRFILMT-UHFFFAOYSA-N 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000005251 gamma ray Effects 0.000 description 1
- 125000003187 heptyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- SYSQUGFVNFXIIT-UHFFFAOYSA-N n-[4-(1,3-benzoxazol-2-yl)phenyl]-4-nitrobenzenesulfonamide Chemical class C1=CC([N+](=O)[O-])=CC=C1S(=O)(=O)NC1=CC=C(C=2OC3=CC=CC=C3N=2)C=C1 SYSQUGFVNFXIIT-UHFFFAOYSA-N 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 125000001147 pentyl group Chemical group C(CCCC)* 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
- C09K19/42—Mixtures of liquid crystal compounds covered by two or more of the preceding groups C09K19/06 - C09K19/40
- C09K19/44—Mixtures of liquid crystal compounds covered by two or more of the preceding groups C09K19/06 - C09K19/40 containing compounds with benzene rings directly linked
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
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- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Nonlinear Science (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Mathematical Physics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal Substances (AREA)
Abstract
The embodiment of the invention discloses a liquid crystal composition and a display panel, wherein the liquid crystal composition comprises at least one compound represented by the general formula (I):a first compound represented by formula (I), wherein X is selected from the group consisting of single bonds, -O-, -S-, -CH 2 ‑、‑CF 2 ‑、‑CH 2 ‑CH 2 ‑、‑CF 2 ‑CF 2 In the invention, the first compound shown as the general formula (I) is added into the liquid crystal composition, so that the performance of the liquid crystal composition is improved in terms of polarity, viscosity, transparency point, dielectric constant, response speed and the like, and the display effect and the product quality of a display panel applying the liquid crystal composition are improved.
Description
Technical Field
The invention relates to the field of display, in particular to a liquid crystal composition and a display panel.
Background
The liquid crystal display panel utilizes the voltage applied to the liquid crystal layer to realize the regulation and control of the optical performance of the materials in the liquid crystal layer, thereby realizing the display function of the liquid crystal display panel. The physical properties (such as polarity, viscosity, transparent point and response speed) of the liquid crystal material of the liquid crystal layer affect the display effect and the product quality of the liquid crystal display panel. At present, the performance of materials applied to a liquid crystal layer is still to be improved, so that the display effect and the product quality of a display panel are difficult to improve.
Accordingly, a liquid crystal composition and a display panel are needed to solve the above-mentioned problems.
Disclosure of Invention
The invention provides a liquid crystal display panel capable of relieving the technical problems that the display effect and the product quality of the display panel are difficult to improve due to the fact that the material performance in a liquid crystal layer is to be improved at present.
The invention provides a liquid crystal composition, which comprises at least one first compound represented by a general formula (I):
wherein X is selected from single bond, -O-, -S-, -CH 2 -、-CF 2 -、-CH 2 -CH 2 -、-CF 2 -CF 2 -；
Z 1 、Z 2 、Z 3 Z is as follows 4 Are each independently selected from single bonds, -O-, -S-, -SO 2 -、-CO-、-C(O)O-、-OC(O)-、-OC(O)O-、-CF 2 O-、-OCF 2 -、-CH 2 -CH 2 -、-CF 2 -CF 2 -、-CF 2 CH 2 -、-(CH 2 ) 3 -、-CH 2 CF 2 -、-CHF-CHF-、-CH 2 O、-OCH 2 -、-CF＝CH-、-CH＝CF-、-CF＝CF-、-CH＝CH-、-C≡C-，Z 1 、Z 2 、Z 3 Z is as follows 4 At least one H of which is substituted by any one atom of F, cl, br, I, H;
R 1 r is as follows 2 Are respectively and independently selected from H, F, cl, br, I, CN, SCN, NCS, SF 5 Substituted or unsubstituted alkyl having 1 to 15 carbon atoms, substituted or unsubstituted alkoxy having 1 to 15 carbon atoms, substituted or unsubstituted alkenyl having 2 to 15 carbon atoms, substituted or unsubstituted alkenyloxy having 2 to 15 carbon atoms, substituted or unsubstituted alkynyl having 2 to 15 carbon atoms, substituted or unsubstituted alkynyloxy having 2 to 15 carbon atoms;
are independently selected from->
Is substituted with any one atom of F, cl, br, I, H;
m, n, o, p are each independently 0, 1 or 2 and m+n+o+p.ltoreq.3.
Preferably, R 1 R is as follows 2 Is independently H, CN or CF 3 Mono-substitution;
wherein R is 1 Or R is 2 One or more of-CH 2 -each independently is represented by-O-, -S-, -SO 2 -、-CO-、-C(O)O-、-OC(O)-、-OC(O)O-、-CF 2 O-、-OCF 2 -、-CH 2 -CH 2 -、-CF 2 -CF 2 -、-CF 2 -CH 2 -、-(CH 2 ) 3 -、-CH 2 -CF 2 -、-CHF-CHF-、-CH 2 O、-OCH 2 -, -CF=CH-, -CH=CF-, -CF=CF-, -CH=CH-or-C≡C-substitution, and not directly bonded to hetero atoms directly bonded to C, R 1 Or R is 2 Is substituted with any one atom of F, cl, br, I, H.
Preferably, the first compound has a structure represented by at least one of the general formulae (I-1) to (I-20):
preferably, the first compound is selected from the group consisting of the compounds shown below:
preferably, the liquid crystal composition further comprises a second compound comprising at least one compound selected from the group consisting of compounds represented by general formulae (ii-1) to (ii-9):
wherein R is 3 And R is 4 Are each independently selected from alkyl groups having 1 to 10 carbon atoms, alkoxy groups having 1 to 10 carbon atoms, alkenyl groups having 2 to 10 carbon atoms, alkenyloxy groups having 2 to 10 carbon atoms, alkynyl groups having 2 to 10 carbon atoms, alkynyloxy groups having 2 to 10 carbon atoms, R 3 And R is 4 Is substituted with any one atom of F, cl, br, I, H.
Preferably, the liquid crystal composition further comprises a third compound comprising at least one compound selected from the group consisting of compounds represented by general formulae (iii-1) to (iii-5):
wherein R is 5 And R is 6 Independently selected from alkyl groups having 1 to 10 carbon atoms, alkyl groups having 1 to 10 carbon atomsOxy, alkenyl having 2 to 10 carbon atoms, alkenyloxy having 2 to 10 carbon atoms, alkynyl having 2 to 10 carbon atoms, alkynyloxy having 2 to 10 carbon atoms, R 5 And R is 6 Is substituted with any one atom of F, cl, br, I, H.
Preferably, in the liquid crystal composition, the mass fraction of the first compound is 1% to 50%, the mass fraction of the second compound is 1% to 90%, and the mass fraction of the third compound is 1% to 90%.
Preferably, in the liquid crystal composition, the mass fraction of the first compound is 1% to 40%, the mass fraction of the second compound is 5% to 70%, and the mass fraction of the third compound is 5% to 70%.
Preferably, in the liquid crystal composition, the mass fraction of the first compound is 1% to 25%, the mass fraction of the second compound is 10% to 50%, and the mass fraction of the third compound is 10% to 50%.
The invention also provides a display panel, which comprises a first substrate, a second substrate positioned on the first substrate, and a liquid crystal layer positioned between the first substrate and the second substrate;
wherein the liquid crystal layer comprises the liquid crystal composition.
According to the invention, the first compound shown in the general formula (I) is added into the liquid crystal composition, so that the performance of the liquid crystal composition is improved in the aspects of polarity, viscosity, transparent point, dielectric constant, response speed and the like, and the display effect and the product quality of a display panel using the liquid crystal composition are improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method for preparing a liquid crystal composition according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a display panel according to an embodiment of the invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention. Furthermore, it should be understood that the detailed description is presented herein for purposes of illustration and description only, and is not intended to limit the invention. In the present invention, unless otherwise indicated, terms of orientation such as "upper" and "lower" are used to generally refer to the upper and lower positions of the device in actual use or operation, and specifically the orientation of the drawing figures; while "inner" and "outer" are for the outline of the device.
At present, as the performance of the material of the liquid crystal layer needs to be improved, the display effect of the liquid crystal display panel and the quality of the product are difficult to improve.
The embodiment of the invention provides a liquid crystal composition, which comprises at least one first compound represented by a general formula (I):
wherein X is selected from single bond, -O-, -S-, -CH 2 -、-CF 2 -、-CH 2 -CH 2 -、-CF 2 -CF 2 -；
Z 1 、Z 2 、Z 3 Z is as follows 4 Are each independently selected from single bonds, -O-, -S-, -SO 2 -、-CO-、-C(O)O-、-OC(O)-、-OC(O)O-、-CF 2 O-、-OCF 2 -、-CH 2 -CH 2 -、-CF 2 -CF 2 -、-CF 2 CH 2 -、-(CH 2 ) 3 -、-CH 2 CF 2 -、-CHF-CHF-、-CH 2 O、-OCH 2 -、-CF＝CH-、-CH＝CF-、-CF＝CF-、-CH＝CH-、-C≡C-，Z 1 、Z 2 、Z 3 Z is as follows 4 At least one H of which is substituted by any atom of F, cl, br, I, H.
R 1 R is as follows 2 Are respectively and independently selected from H, F, cl, br, I, CN, SCN, NCS, SF 5 Substituted or unsubstituted alkyl having 1 to 15 carbon atoms, substituted or unsubstituted alkoxy having 1 to 15 carbon atoms, substituted or unsubstituted alkenyl having 2 to 15 carbon atoms, substituted or unsubstituted alkenyloxy having 2 to 15 carbon atoms, substituted or unsubstituted alkynyl having 2 to 15 carbon atoms, substituted or unsubstituted alkynyloxy having 2 to 15 carbon atoms;
are independently selected from->
Any H of (a) is substituted with any one atom of F, cl, br, I, H;
m, n, o, p are each independently 0, 1 or 2 and m+n+o+p.ltoreq.3.
According to the invention, the first compound shown in the general formula (I) is added into the liquid crystal composition, so that the performance of the liquid crystal composition is improved in the aspects of polarity, viscosity, transparent point, dielectric constant, response speed and the like, and the display effect and the product quality of a display panel using the liquid crystal composition are improved.
In this embodiment, R 1 R is as follows 2 Is independently H, CN or CF 3 Mono-substitution;
wherein R is 1 Or R is 2 One or more of-CH 2 -each independently is represented by-O-, -S-, -SO 2 -、-CO-、-C(O)O-、-OC(O)-、-OC(O)O-、-CF 2 O-、-OCF 2 -、-CH 2 -CH 2 -、-CF 2 -CF 2 -、-CF 2 -CH 2 -、-(CH 2 ) 3 -、-CH 2 -CF 2 -、-CHF-CHF-、-CH 2 O、-OCH 2 -, -CF=CH-, -CH=CF-, -CF=CF-, -CH=CH-or-C≡C-substitution, and not directly bonded to hetero atoms directly bonded to C, R 1 Or R is 2 Is substituted with any one atom of F, cl, br, I, H. R is R 1 Or R is 2 At least one H of (a) is substituted by any atom of F, cl, br, I, H, i.e. R 1 Or R is 2 Any H of (c) may or may not be substituted with F, cl, br, I or F, cl, br, I. When R is 1 Or R is 2 When at least one H of (C) is substituted by F, cl, br, I, the preferred substituent is F or Cl.
In some embodiments, R 1 R is as follows 2 Each independently selected from H, F, cl, br, substituted or unsubstituted alkyl having 1 to 7 carbon atoms, substituted or unsubstituted alkoxy having 1 to 7 carbon atoms, substituted or unsubstituted alkenyl having 2 to 7 carbon atoms, substituted or unsubstituted alkenyloxy having 2 to 7 carbon atoms, substituted or unsubstituted alkynyl having 2 to 7 carbon atoms, substituted or unsubstituted alkynyloxy having 2 to 7 carbon atoms.
In some embodiments, R 1 R is as follows 2 Each independently selected from H, F, alkyl having 2 to 7 carbon atoms, alkoxy having 2 to 7 carbon atoms, alkenyl having 2 to 7 carbon atoms, alkenyloxy having 2 to 7 carbon atoms, alkynyl having 2 to 7 carbon atoms, alkynyloxy having 2 to 7 carbon atoms.
In some embodiments, when R 1 R is as follows 2 When independently selected from alkyl, alkenyl or alkynyl, the alkyl, alkenyl or alkynyl groups are aliphatic hydrocarbon groups。
Wherein when R is 1 R is as follows 2 When independently selected from alkyl groups, the alkyl groups may be straight chain alkyl groups or branched chain alkyl groups, preferably straight chain alkyl groups; more preferably, R 1 R is as follows 2 Each independently selected from straight chain alkyl groups having 1 to 7 carbon atoms such as methyl, ethyl, propyl, ding Ji, pentyl, hexyl or heptyl.
When R is 1 R is as follows 2 When each is independently selected from alkenyl, the alkenyl group may be a straight chain alkenyl group or a branched alkenyl group, and the alkenyl group may be an isomer of the E configuration and the Z configuration, and has at least one carbon-carbon double bond, preferably a straight chain alkenyl group having 2 to 7 carbon atoms, more preferably vinyl, prop-1-enyl, prop-2-enyl, but-1-enyl, but-2-enyl, but-3-enyl, pent-1-enyl, pent-2-enyl, pent-3-enyl, pent-4-enyl, hex-1-enyl, hex-2-enyl, hex-3-enyl, hex-4-enyl, hex-5-enyl, hept-1-enyl, hept-2-enyl, hept-3-enyl, hept-4-enyl, hept-5-enyl, hept-6-enyl, and the like; further preferred are prop-2-enyl, but-3-enyl, pent-2-enyl, pent-3-enyl and pent-4-enyl.
When R is 1 R is as follows 2 When each is independently selected from alkynyl, the alkynyl may be straight-chain alkynyl or branched-chain alkynyl and has at least one carbon-carbon triple bond, preferably straight-chain alkynyl having 2 to 7 carbon atoms, more preferably ethynyl, prop-1-ynyl, prop-2-ynyl, but-1-ynyl, but-2-ynyl, but-3-ynyl, pent-1-ynyl, pent-2-ynyl, pent-3-ynyl, pent-4-ynyl, hex-1-ynyl, hex-2-ynyl, hex-3-ynyl, hex-4-ynyl, hex-5-ynyl, hept-1-ynyl, hept-2-ynyl, hept-3-ynyl, hept-4-ynyl, hept-5-ynyl, hept-6-ynyl and the like; further preferred are prop-2-ynyl, but-3-ynyl, pent-2-ynyl, pent-3-ynyl or pent-4-ynyl.
In some embodiments, X is preferably a single bond, -CH 2 -, -O-and-CF 2 -; x is further preferably-CH 2 -and O.
In some embodiments, m, n, o, p preferably each independently represents 0 or 1.
In some embodiments, the first compound has a structure according to at least one of formulas (I-1) to (I-20):
in some embodiments, the first compound is selected from the group consisting of the compounds shown below:
the first compound represented by the general formula (I) has optical activity, and the carbon chain skeleton of the first compound has an asymmetric center or a chiral center, or the substituent of the first compound has an asymmetric center or a chiral center. The first compound may be a mixture of isomers represented by the same structural formula, such as at least one pair of pure enantiomers, diastereomers, E-isomers, or Z-isomers. Alternatively, the first compound may be a mixture of multiple isomers represented by the same structural formula in different proportions.
In this embodiment, the liquid crystal composition further comprises a second compound (represented by general formula (ii)), which comprises at least one compound selected from the group consisting of compounds represented by general formulae (ii-1) to (ii-9):
wherein R is 3 And R is 4 Each independently selected from alkyl having 1 to 10 carbon atoms, alkoxy having 1 to 10 carbon atoms, alkenyl having 2 to 10 carbon atoms, alkenyloxy having 2 to 10 carbon atoms, alkynyl having 2 to 10 carbon atoms, or alkynyloxy having 2 to 10 carbon atoms, R 3 And R is 4 Is substituted with any one atom of F, cl, br, I, H.
In this embodiment, the liquid crystal composition further includes a third compound (represented by general formula (iii)) including at least one compound selected from the group consisting of compounds represented by general formulae (iii-1) to (iii-5):
wherein R is 5 And R is 6 Each independently selected from alkyl having 1 to 10 carbon atoms, alkoxy having 1 to 10 carbon atoms, alkenyl having 2 to 10 carbon atoms, alkenyloxy having 2 to 10 carbon atoms, alkynyl having 2 to 10 carbon atoms, or alkynyloxy having 2 to 10 carbon atoms, R 5 And R is 6 Is substituted with any one atom of F, cl, br, I, H.
In this embodiment, in the liquid crystal composition, the mass fraction of the first compound is 1% to 50%, the mass fraction of the second compound is 1% to 90%, and the mass fraction of the third compound is 1% to 90%.
Preferably, in the liquid crystal composition, the mass fraction of the first compound is 1% to 40%, the mass fraction of the second compound is 5% to 70%, and the mass fraction of the third compound is 5% to 70%.
More preferably, in the liquid crystal composition, the mass fraction of the first compound is 1% to 25%, the mass fraction of the second compound is 10% to 50%, and the mass fraction of the third compound is 10% to 50%.
In some embodiments, the liquid crystal composition has an optical anisotropy value at 25 ℃ of greater than or equal to 0.08, and the liquid crystal composition has an optical anisotropy value at 25 ℃ of less than or equal to 0.13, for example: 0.09, 0.1, 0.105, 0.11, 0.115, 0.12, 0.125, etc., so as to make the optical anisotropy value of the liquid crystal composition within a proper range, improve the light transmittance of the liquid crystal composition, ensure the light transmittance of the liquid crystal composition within a proper range, and avoid the optical anisotropy value of the liquid crystal composition from affecting the optical performance of the liquid crystal composition.
In some embodiments, the liquid crystal composition has a bending modulus of elasticity greater than or equal to 10 and the liquid crystal composition has a bending modulus of elasticity less than or equal to 25, for example: 12. 13, 14, 15, 18, 20, 22, 24, etc.; and/or the liquid crystal composition has a splay elastic modulus of greater than or equal to 10, the liquid crystal composition has a splay elastic modulus of less than or equal to 25, for example: 12. 13, 14, 15, 18, 20, 22, 24, etc.; the flexural modulus of elasticity of the liquid crystal composition and/or the splay modulus of elasticity of the liquid crystal composition are within the above ranges, which is beneficial to improving the light transmittance of the liquid crystal composition and improving the response time of the liquid crystal composition, and ensures that the light transmittance and the response time of the liquid crystal composition are within proper ranges.
In some embodiments, the liquid crystal composition has an absolute value of the dielectric anisotropy value at 25 ℃ of greater than or equal to 2, and the liquid crystal composition has an absolute value of the dielectric anisotropy value at 25 ℃ of less than or equal to 5.5, for example: 2.2, 2.5, 2.8, 3, 3.2, 3.5, 3.8, 4, 4.2, 4.5, 4.8, 5, 5.2, etc., which is advantageous in reducing a driving voltage required to drive the liquid crystal composition, thereby reducing a driving voltage of a liquid crystal display panel to which the liquid crystal composition is applied, and reducing power consumption of the liquid crystal display panel to which the liquid crystal composition is applied.
In some embodiments, the transparent dot of the liquid crystal composition is preferably 75 ℃ to 95 ℃, for example, the transparent dot of the liquid crystal composition may be 76 ℃, 78 ℃, 80 ℃, 82 ℃, 84 ℃, 88 ℃, 90 ℃, 92 ℃, 94 ℃, etc., to avoid a decrease in the high temperature resistance of the liquid crystal composition caused by an excessively low transparent dot of the liquid crystal composition.
Referring to fig. 1, an exemplary preparation method of the liquid crystal composition provided by the present invention is as follows:
the preparation method of the liquid crystal composition comprises the following steps:
s100, weighing and mixing the first compound, the second compound and the third compound according to the mass percentage in a first sequence to obtain a first mixture.
The first order is preferably that the first compound, the second compound, and the third compound are weighed and mixed in this order from the low melting point to the high melting point.
S200, stirring the first mixture at a first heating temperature to thoroughly mix the first compound, the second compound, and the third compound in the first mixture.
The first heating temperature is preferably 60 ℃ to 100 ℃.
And S300, cooling the first mixture to room temperature and packaging to obtain the liquid crystal composition.
Exemplary combinations of the liquid crystal compositions of the present invention are shown in the following exemplary embodiments 1 to 6.
Example 1
The structural formulas of the first compound, the second compound, and the third compound selected in this embodiment are shown in table 1:
table 1: components of liquid Crystal composition
The liquid crystal composition obtained in example 1 has the following performance parameters: tni is 87 ℃, gamma 1: 85mPa·sΔn:0.107，ne:1.579，Δε:-3.5，ε ⊥ :8.5，K 11 /K 33 13.1/14.1, the liquid crystal composition is placed at the temperature of minus 20 ℃ for 480 hours without crystal precipitation. Wherein Tni represents a clearing point of the liquid crystal composition; gamma ray 1 Represents the rotational viscosity of the liquid crystal composition at 25 ℃; Δn represents the optical anisotropy value of the liquid crystal composition at 25 ℃, ne represents the refractive index of the extraordinary ray of the liquid crystal composition; delta epsilon represents the dielectric constant anisotropy value of the liquid crystal composition at 25 ℃; epsilon ⊥ A value representing the dielectric constant of the liquid crystal composition in a direction perpendicular to the long axis of the liquid crystal molecules; k (K) 11 /K 33 Represents the ratio of the elastic properties constants of the liquid crystal composition, wherein K 11 Represents the bending modulus, K, of the liquid crystal composition 33 Represents the splay elastic modulus of the liquid crystal composition.
Example 2
The structural formulas of the first compound, the second compound, and the third compound selected in this embodiment are shown in table 2:
table 2: components of liquid Crystal composition
The liquid crystal composition obtained in example 2 had the following performance parameters: tni is 81 ℃, gamma 1: 80mPa·sΔn:0.108，ne:1.575，Δε:-3.7，ε ⊥ :8.3，K 11 /K 33 13.5/14.3, the liquid crystal composition is placed at the temperature of minus 20 ℃ for 480 hours without crystal precipitation.
Example 3
The structural formulas of the first compound, the second compound, and the third compound selected in this embodiment are shown in table 3:
table 3: components of liquid Crystal composition
The liquid crystal composition obtained in example 3 had the following performance parameters: tni is 82 ℃, gamma 1: 88mPa·sΔn:0.108，ne:1.592，Δε:-3.6，ε ⊥ :8.7，K 11 /K 33 14.0/15.2, and the liquid crystal composition is placed at the temperature of minus 20 ℃ for 480 hours without crystal precipitation.
Example 4
The structural formulas of the first compound, the second compound, and the third compound selected in this embodiment are shown in table 4:
table 4: components of liquid Crystal composition
The liquid crystal composition obtained in example 4 had the following performance parameters: tni at 83 ℃, gamma 1: 80mPa·sΔn:0.107，ne:1.575，Δε:-3.6，ε ⊥ :8.2，K 11 /K 33 13.5/14.4, the liquid crystal composition is placed at the temperature of minus 20 ℃ for 480 hours without crystal precipitation.
Example 5
The structural formulas of the first compound, the second compound, and the third compound selected in this embodiment are shown in table 5:
table 5: components of liquid Crystal composition
The liquid crystal composition obtained in example 5 had the following performance parameters: tni is 85 ℃, gamma 1: 80mPa·sΔn:0.108，ne:1.581，Δε:-3.6，ε ⊥ :7.8，K 11 /K 33 14.1/15.6, the liquid crystal composition is placed at the temperature of minus 20 ℃ for 480 hours without crystal precipitation.
Example 6
The structural formulas of the first compound, the second compound, and the third compound selected in this embodiment are shown in table 6:
table 6: components of liquid Crystal composition
The liquid crystal composition obtained in example 6 had the following performance parameters: tni at 83 ℃, gamma 1: 80mPa·sΔn:0.107，ne:1.573，Δε:-3.6，ε ⊥ :8.1，K 11 /K 33 13.5/15.3, the liquid crystal composition is placed for 480 hours at the temperature of minus 20 ℃ without crystal precipitation.
The 6 groups of liquid crystal compositions provided in the above examples 1 to 6 have clear points between 81 ℃ and 87 ℃ so that the liquid crystal composition has good high temperature resistance; the rotational viscosity at 25 ℃ is between 80 Pa.s and 88 Pa.s, so that the liquid crystal composition has good rotational speed, and the response time of the liquid crystal composition is shortened; the optical anisotropy value at 25 ℃ is 0.107 or 0.108, so that the liquid crystal composition has good light transmittance; the dielectric anisotropy value at 25 ℃ is between-3.7 and-3.5, which is favorable for driving the liquid crystal composition at a lower driving voltage, thereby reducing the power consumption of a display panel using the liquid crystal composition; the bending elastic coefficient of the liquid crystal composition is between 13.1 and 14.1, and the splay elastic coefficient is between 14.1 and 15.6, so that the light transmittance of the liquid crystal composition is improved and the response time of the liquid crystal composition is improved; as is apparent from the above examples 1 to 6, the liquid crystal composition provided by the present invention obtains the liquid crystal composition having a larger dielectric constant, a higher anisotropy value, a lower viscosity, a higher clearing point and a faster response speed by the combination of the first compound, the second compound and the third compound.
Referring to fig. 2, the embodiment of the invention further provides a display panel 100, where the display panel 100 includes a first substrate 101, a second substrate 102 disposed on the first substrate 101, and a liquid crystal layer 103 disposed between the first substrate 101 and the second substrate 102. Wherein the liquid crystal layer 103 comprises a liquid crystal composition as described above.
The first substrate 101 may be an array substrate, and the second substrate 102 may be a color film substrate. In some embodiments, when the first substrate 101 is an array substrate, the first substrate 101 includes a first substrate, an active layer on the substrate, a first insulating layer on the active layer, a gate layer on the first insulating layer, a second insulating layer on the gate layer, a source drain layer on the second insulating layer, and a third insulating layer on the source drain layer, where the source drain layer includes a source and a drain. The display panel further comprises a common electrode layer and a pixel electrode layer, wherein the pixel electrode layer is positioned on one side, far away from the first substrate, of the third insulating layer, the pixel electrode layer comprises a pixel electrode, and the pixel electrode is electrically connected with the source electrode or the drain electrode. The common electrode layer includes a common electrode, and the common electrode layer may be disposed on the first substrate 101, and the common electrode layer is located between the pixel electrode layer and the source/drain electrode layer, or on a side of the pixel electrode layer away from the first substrate; the common electrode layer may be disposed with the second substrate 102, the second substrate 102 includes a second substrate, and the common electrode layer is located at a side of the second substrate near the liquid crystal layer. The display panel further comprises a color film layer, wherein the color film layer can be arranged on one side of the first substrate close to the liquid crystal layer or one side of the second substrate close to the liquid crystal layer.
The display panel 100 may be a display panel of a display mode such as VA (Vertical Alignment ), ECB (Electrically Controlled Birefringence, electrically controlled birefringence), FFS (Fringe Field Switching ), or IPS (In-plane switching).
According to the display panel provided by the invention, the first compound shown in the general formula (I) is added into the liquid crystal composition used in the liquid crystal layer, so that the performance of the liquid crystal composition is improved in the aspects of polarity, viscosity, transparent point, response speed and the like, and the display effect and the product quality of the display panel using the liquid crystal composition are improved.
The embodiment of the invention discloses a liquid crystal composition and a display panel, wherein the liquid crystal composition comprises at least one compound represented by the general formula (I):a first compound represented by formula (I), wherein X is selected from the group consisting of single bonds, -O-, -S-, -CH 2 -、-CF 2 -、-CH 2 -CH 2 -、-CF 2 -CF 2 In the invention, the first compound shown as the general formula (I) is added into the liquid crystal composition, so that the performance of the liquid crystal composition is improved in terms of polarity, viscosity, transparency point, dielectric constant, response speed and the like, and the display effect and the product quality of a display panel applying the liquid crystal composition are improved.
The foregoing has outlined a detailed description of a liquid crystal composition and display panel provided by the embodiments of the present invention, wherein specific examples are provided herein to illustrate the principles and embodiments of the present invention, and the above examples are provided to assist in understanding the method and core ideas of the present invention; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present invention, the present description should not be construed as limiting the present invention.
Claims (10)
1. A liquid crystal composition comprising at least one first compound represented by the general formula (i):
wherein X is selected from single bond, -O-, -S-, -CH 2 -、-CF 2 -、-CH 2 -CH 2 -、-CF 2 -CF 2 -；
Z 1 、Z 2 、Z 3 Z is as follows 4 Are each independently selected from single bonds, -O-, -S-, -SO 2 -、-CO-、-C(O)O-、-OC(O)-、-OC(O)O-、-CF 2 O-、-OCF 2 -、-CH 2 -CH 2 -、-CF 2 -CF 2 -、-CF 2 CH 2 -、-(CH 2 ) 3 -、-CH 2 CF 2 -、-CHF-CHF-、-CH 2 O、-OCH 2 -、-CF＝CH-、-CH＝CF-、-CF＝CF-、-CH＝CH-、-C≡C-，Z 1 、Z 2 、Z 3 Z is as follows 4 At least one H of which is substituted by any one atom of F, cl, br, I, H;
R 1 r is as follows 2 Are respectively and independently selected from H, F, cl, br, I, CN, SCN, NCS, SF 5 Substituted or unsubstituted alkyl having 1 to 15 carbon atoms, substituted or unsubstituted alkoxy having 1 to 15 carbon atoms, substituted or unsubstituted alkenyl having 2 to 15 carbon atoms, substituted or unsubstituted alkenyloxy having 2 to 15 carbon atoms, substituted or unsubstituted alkynyl having 2 to 15 carbon atoms, substituted or unsubstituted alkynyloxy having 2 to 15 carbon atoms;
are independently selected from-> Is substituted with any one atom of F, cl, br, I, H;
m, n, o, p are each independently 0, 1 or 2 and m+n+o+p.ltoreq.3.
2. The liquid crystal composition according to claim 1, wherein R 1 R is as follows 2 Is independently H, CN or CF 3 Mono-substitution;
wherein R is 1 Or R is 2 One or more of-CH 2 -each independently is represented by-O-, -S-, -SO 2 -、-CO-、-C(O)O-、-OC(O)-、-OC(O)O-、-CF 2 O-、-OCF 2 -、-CH 2 -CH 2 -、-CF 2 -CF 2 -、-CF 2 -CH 2 -、-(CH 2 ) 3 -、-CH 2 -CF 2 -、-CHF-CHF-、-CH 2 O、-OCH 2 -, -CF=CH-, -CH=CF-, -CF=CF-, -CH=CH-or-C≡C-substitution, and not directly bonded to hetero atoms directly bonded to C, R 1 Or R is 2 Is substituted with any one atom of F, cl, br, I, H.
3. The liquid crystal composition according to claim 1, wherein the first compound has a structure represented by at least one of the general formulae (i-1) to (i-20):
4. a liquid crystal composition according to any one of claims 1 to 3, wherein the first compound is selected from the group consisting of the compounds shown below:
5. the liquid crystal composition according to claim 1, further comprising a second compound comprising at least one compound selected from the group consisting of compounds represented by general formulae (ii-1) to (ii-9):
wherein R is 3 And R is 4 Are each independently selected from alkyl groups having 1 to 10 carbon atoms, alkoxy groups having 1 to 10 carbon atoms, alkenyl groups having 2 to 10 carbon atoms, alkenyloxy groups having 2 to 10 carbon atoms, alkynyl groups having 2 to 10 carbon atoms, alkynyloxy groups having 2 to 10 carbon atoms, R 3 And R is 4 Is substituted with any one atom of F, cl, br, I, H.
6. The liquid crystal composition according to claim 5, further comprising a third compound comprising at least one compound selected from the group consisting of compounds represented by general formulae (iii-1) to (iii-5):
wherein R is 5 And R is 6 Are each independently selected from alkyl groups having 1 to 10 carbon atoms, alkoxy groups having 1 to 10 carbon atoms, alkenyl groups having 2 to 10 carbon atoms, alkenyloxy groups having 2 to 10 carbon atoms, alkynyl groups having 2 to 10 carbon atoms, alkynyloxy groups having 2 to 10 carbon atoms, R 5 And R is 6 Is substituted with any one atom of F, cl, br, I, H.
7. The liquid crystal composition according to claim 6, wherein the mass fraction of the first compound is 1% to 50%, the mass fraction of the second compound is 1% to 90%, and the mass fraction of the third compound is 1% to 90%.
8. The liquid crystal composition according to claim 7, wherein the mass fraction of the first compound is 1% to 40%, the mass fraction of the second compound is 5% to 70%, and the mass fraction of the third compound is 5% to 70% in the liquid crystal composition.
9. The liquid crystal composition according to claim 8, wherein the mass fraction of the first compound is 1% to 25%, the mass fraction of the second compound is 10% to 50%, and the mass fraction of the third compound is 10% to 50% in the liquid crystal composition.
10. A display panel, comprising a first substrate, a second substrate positioned on the first substrate, and a liquid crystal layer positioned between the first substrate and the second substrate;
wherein the liquid crystal layer comprises the liquid crystal composition according to any one of claims 1 to 9.
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