CN117487567A - Liquid crystal composition and liquid crystal display panel - Google Patents
Liquid crystal composition and liquid crystal display panel Download PDFInfo
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- CN117487567A CN117487567A CN202310575277.6A CN202310575277A CN117487567A CN 117487567 A CN117487567 A CN 117487567A CN 202310575277 A CN202310575277 A CN 202310575277A CN 117487567 A CN117487567 A CN 117487567A
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 201
- 239000000203 mixture Substances 0.000 title claims abstract description 122
- 150000001875 compounds Chemical class 0.000 claims abstract description 160
- 125000004432 carbon atom Chemical group C* 0.000 claims description 48
- 239000000126 substance Substances 0.000 claims description 45
- 125000003342 alkenyl group Chemical group 0.000 claims description 24
- 125000003302 alkenyloxy group Chemical group 0.000 claims description 24
- 125000003545 alkoxy group Chemical group 0.000 claims description 24
- 125000000217 alkyl group Chemical group 0.000 claims description 24
- 125000000304 alkynyl group Chemical group 0.000 claims description 24
- 125000005133 alkynyloxy group Chemical group 0.000 claims description 24
- 239000000758 substrate Substances 0.000 claims description 18
- 125000005842 heteroatom Chemical group 0.000 claims description 9
- 125000001424 substituent group Chemical group 0.000 claims description 9
- -1 methoxy, ethyl Chemical group 0.000 description 158
- 210000002858 crystal cell Anatomy 0.000 description 17
- 230000000694 effects Effects 0.000 description 12
- 238000002844 melting Methods 0.000 description 12
- 230000008018 melting Effects 0.000 description 12
- 230000003287 optical effect Effects 0.000 description 12
- 238000002834 transmittance Methods 0.000 description 12
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 11
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 11
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 11
- 125000003707 hexyloxy group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])O* 0.000 description 8
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 8
- 229920002554 vinyl polymer Polymers 0.000 description 8
- 230000009286 beneficial effect Effects 0.000 description 7
- 125000004972 1-butynyl group Chemical group [H]C([H])([H])C([H])([H])C#C* 0.000 description 6
- 125000000069 2-butynyl group Chemical group [H]C([H])([H])C#CC([H])([H])* 0.000 description 6
- 125000000474 3-butynyl group Chemical group [H]C#CC([H])([H])C([H])([H])* 0.000 description 6
- 230000000875 corresponding effect Effects 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 238000002156 mixing Methods 0.000 description 6
- 238000002360 preparation method Methods 0.000 description 6
- 238000003756 stirring Methods 0.000 description 6
- 125000004973 1-butenyl group Chemical group C(=CCC)* 0.000 description 3
- 125000004974 2-butenyl group Chemical group C(C=CC)* 0.000 description 3
- 125000004975 3-butenyl group Chemical group C(CC=C)* 0.000 description 3
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 3
- 210000004027 cell Anatomy 0.000 description 3
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 3
- 125000004115 pentoxy group Chemical group [*]OC([H])([H])C([H])([H])C([H])([H])C(C([H])([H])[H])([H])[H] 0.000 description 3
- 125000001147 pentyl group Chemical group C(CCCC)* 0.000 description 3
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 3
- LMBFAGIMSUYTBN-MPZNNTNKSA-N teixobactin Chemical compound C([C@H](C(=O)N[C@@H]([C@@H](C)CC)C(=O)N[C@@H](CO)C(=O)N[C@H](CCC(N)=O)C(=O)N[C@H]([C@@H](C)CC)C(=O)N[C@@H]([C@@H](C)CC)C(=O)N[C@@H](CO)C(=O)N[C@H]1C(N[C@@H](C)C(=O)N[C@@H](C[C@@H]2NC(=N)NC2)C(=O)N[C@H](C(=O)O[C@H]1C)[C@@H](C)CC)=O)NC)C1=CC=CC=C1 LMBFAGIMSUYTBN-MPZNNTNKSA-N 0.000 description 3
- 230000002596 correlated effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 1
- YCLAMANSVUJYPT-UHFFFAOYSA-L aluminum chloride hydroxide hydrate Chemical compound O.[OH-].[Al+3].[Cl-] YCLAMANSVUJYPT-UHFFFAOYSA-L 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- 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)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention provides a liquid crystal composition and a liquid crystal display panel, wherein the liquid crystal composition comprises at least one ofRepresented compound, at least one ofA compound of formula (I), and at least one ofA compound represented by the formula (I). In the invention, the response speed of the liquid crystal display device prepared by adopting the liquid crystal composition can be improved.
Description
Technical Field
The invention relates to the technical field of display, in particular to a liquid crystal composition and a liquid crystal display panel.
Background
With the development of display technology, flat display devices such as liquid crystal display devices (Liquid Crystal Display, LCD) have been widely used in various consumer electronic products such as mobile phones, televisions, personal digital assistants, digital cameras, notebook computers, and desktop computers, and have become the mainstream of display devices, because of their advantages such as high image quality, power saving, thin body, and wide application range.
In order to meet the demands of various consumer electronics, liquid crystal materials for display elements and display devices such as IPS display mode, FFS display mode, and VA display mode are required to have (1) a low driving voltage: the liquid crystal material has larger dielectric anisotropy; (2) fast response: the liquid crystal material has smaller viscosity and larger elastic coefficient; (3) high temperature resistance: the liquid crystal material has higher clearing point; (4) high contrast: the liquid crystal material has suitable optical anisotropy and dielectric negativity.
In the prior art, the improvement of the response speed can be realized by reducing the thickness of the liquid crystal box, but reducing the thickness of the liquid crystal box can influence the transmittance of the liquid crystal box, and further influence the display effect of the liquid crystal display device, so that the response speed of the liquid crystal display device is difficult to be effectively improved in consideration of the influence on the liquid crystal display effect.
Disclosure of Invention
The embodiment of the invention provides a liquid crystal composition and a liquid crystal display panel, which are used for solving the technical problem that the response speed of the conventional liquid crystal display panel is slower.
In a first aspect, embodiments of the present invention provide a liquid crystal composition comprising:
at least one compound represented by the following formula I;
at least one compound represented by the following chemical formula II; and
at least one compound represented by the following chemical formula III;
wherein Z is 1 And Z 2 Independently of one another, is a single bond, -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-; z is Z 1 And Z 2 Wherein H is zero substituted or mono substituted or polysubstituted by F, cl, br or I;
R 1 -R 6 h, F, cl, br, I, CN, SCN, NCS, SF independently of each other 5 Or alkyl or alkoxy having 1 to 15 carbon atoms, or alkenyl, alkenyloxy, alkynyl or alkynyloxy having 2 to 15 carbon atoms, wherein R 1 -R 6 Is H, CN or CF 3 Zero or mono-substituted, R 1 -R 6 CH of (2) 2 The radicals being-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 CF 2 -、-CHF-CHF-、-CH 2 O-、-OCH 2 -, -CF=CH-, -CH=CF-, -CF-, -CH=CH-, or-C≡C-zero-substituted or mono-substituted or polysubstituted, and the heteroatoms are not directly bonded, and the CH is substituted 2 H in the substituents of the radicals is zero-substituted or mono-substituted or polysubstituted by F, cl, br or I.
Alternatively, in some embodiments of the present invention, the compound represented by formula I is selected from one or more of the compounds represented by the following sub-formulae I-1 to I-3; the sub-formulae I-1 to I-3 are in particular:
wherein R is 1 And R is 2 H, F, cl, br, I, CN, SCN, NCS, SF independently of each other 5 Or alkyl or alkoxy having 1 to 15 carbon atoms, or alkenyl, alkenyloxy, alkynyl or alkynyloxy having 2 to 15 carbon atoms, wherein R 1 And R is 2 Is zero-substituted or monosubstituted by H, CN or CF3, R 1 And R is 2 CH of (2) 2 The radicals being-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 CF 2 -、-CHF-CHF-、-CH 2 O-、-OCH 2 -, -CF=CH-, -CH=CF-, -CF-, -CH=CH-, or-C≡C-zero-substituted or mono-substituted or polysubstituted, and the heteroatoms are not directly bonded, and the CH is substituted 2 H in the substituents of the radicals is zero-substituted or mono-substituted or polysubstituted by F, cl, br or I.
Alternatively, in some embodiments of the present invention, the compound represented by formula II is selected from one or more of the compounds represented by the following sub-formulae II-1 to II-3; the sub-formulae II-1 to II-3 are specifically:
wherein R is 3 And R is 4 H, F, cl, br, I, CN, SCN, NCS, SF independently of each other 5 Or alkyl or alkoxy having 1 to 15 carbon atoms, or alkenyl, alkenyloxy, alkynyl or alkynyloxy having 2 to 15 carbon atoms, wherein R 3 And R is 4 Is H, CN or CF 3 Zero or mono-substituted, R 3 And R is 4 CH of (2) 2 The radicals being-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 CF 2 -、-CHF-CHF-、-CH 2 O-、-OCH 2 -, -CF=CH-, -CH=CF-, -CF-, -CH=CH-, or-C≡C-zero-substituted or mono-substituted or polysubstituted, and the heteroatoms are not directly bonded, and the CH is substituted 2 H in the substituents of the radicals is zero-substituted or mono-substituted or polysubstituted by F, cl, br or I.
Optionally, in some embodiments of the invention, the liquid crystal composition further comprises at least one compound represented by formula IV below,
wherein R is 7 And R is 8 Independently of one another, alkyl or alkoxy having 1 to 10 carbon atoms, or alkenyl, alkenyloxy, alkynyl or alkynyloxy having 2 to 10 carbon atoms; r is R 7 And R is 8 Wherein H is zero substituted or mono substituted or polysubstituted by F, cl, br or I.
Optionally, in some embodiments of the invention, the liquid crystal composition further comprises at least one compound represented by formula V below,
wherein R is 9 And R is 10 Independently of one another, alkyl or alkoxy having 1 to 10 carbon atoms, or alkenyl, alkenyloxy, alkynyl or alkynyloxy having 2 to 10 carbon atoms; r is R 9 And R is 10 Wherein H is zero substituted or mono substituted or polysubstituted by F, cl, br or I.
Optionally, in some embodiments of the invention, the liquid crystal composition further comprises at least one compound represented by formula VI below,
wherein R is 11 And R is 12 Independently of one another, alkyl or alkoxy having 1 to 10 carbon atoms, or alkenyl, alkenyloxy, alkynyl or alkynyloxy having 2 to 10 carbon atoms; r is R 11 And R is 12 Wherein H is zero substituted or mono substituted or polysubstituted by F, cl, br or I.
Optionally, in some embodiments of the invention, the liquid crystal composition further comprises at least one compound represented by formula IV below and at least one compound represented by formula V below,
or comprises at least one compound represented by the following chemical formula IV and at least one compound represented by the following chemical formula VI,
or comprises at least one compound represented by the following chemical formula V and at least one compound represented by the following chemical formula VI,
wherein R is 7 -R 12 Independently of one another, alkyl or alkoxy having 1 to 10 carbon atoms, or alkenyl, alkenyloxy, alkynyl or alkynyloxy having 2 to 10 carbon atoms; r is R 7 -R 12 Wherein H is zero substituted or mono substituted or polysubstituted by F, cl, br or I.
Optionally, in some embodiments of the invention, the liquid crystal composition further comprises at least one compound represented by formula IV below, at least one compound represented by formula V below, and at least one compound represented by formula VI below,
wherein R is 7 -R 12 Independently of one another, alkyl or alkoxy having 1 to 10 carbon atoms, or alkenyl, alkenyloxy, alkynyl or alkynyloxy having 2 to 10 carbon atoms; r is R 7 -R 12 Wherein H is zero substituted or mono substituted or polysubstituted by F, cl, br or I.
Alternatively, in some embodiments of the present invention, the liquid crystal composition includes 1 to 50% of the compound represented by formula I, 1 to 40% of the compound represented by formula II, and 1 to 40% of the compound represented by formula III in weight percent; or (b)
The liquid crystal composition comprises 5-40% of a compound represented by a chemical formula I, 3-40% of a compound represented by a chemical formula II and 1-30% of a compound represented by a chemical formula III; or (b)
The liquid crystal composition comprises 10-30% of a compound represented by a chemical formula I, 5-35% of a compound represented by a chemical formula II and 1-20% of a compound represented by a chemical formula III.
In a second aspect, an embodiment of the present invention provides a liquid crystal display panel, including a first substrate, a second substrate, and a liquid crystal layer, where the first substrate and the second substrate are disposed opposite to each other, the liquid crystal layer is disposed between the first substrate and the second substrate, and the liquid crystal layer includes the liquid crystal composition.
According to the liquid crystal composition provided by the embodiment of the invention, the compound shown in the chemical formula I, the compound shown in the chemical formula II and the compound shown in the chemical formula III are matched to form the liquid crystal composition, so that the contrast ratio of a liquid crystal display device prepared by adopting the liquid crystal composition is kept at a higher level, and the liquid crystal composition has better transmittance, and even if the cell thickness of a liquid crystal cell in the liquid crystal display device is adjusted, the liquid crystal display device has better display effect, so that the problem of difficult response speed improvement caused by difficult adjustment due to the influence of the transmittance on the cell thickness of the liquid crystal cell is avoided.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a liquid crystal display panel according to an embodiment of the present 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.
In a first aspect, embodiments of the present invention provide a liquid crystal composition comprising at least one compound represented by the following formula I, at least one compound represented by the following formula II, and at least one compound represented by the following formula III;
wherein Z is 1 And Z 2 Independently of one another, is a single bond, -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-; preferably Z 1 And Z 2 Independently of one another, is a single bond, -CH 2 O、-OCH 2 -、-CF 2 O-、-OCF 2 -、-CH 2 CH 2 -、-CF 2 CF 2 -、-CF 2 CH 2 -、-CH 2 CF 2 -、-CHF-CHF-; more preferably, Z 1 And Z 2 Independently of one another, is a single bond, -CH 2 O、-OCH 2 -、-CH 2 CH 2 -. In the present embodiment, Z 1 And Z 2 May be substituted with F, cl, br or I;
R 1 -R 6 h, F, cl, br, I, CN, SCN, NCS, SF independently of each other 5 The method comprises the steps of carrying out a first treatment on the surface of the Alternatively, R 1 -R 6 Independently of one another, are alkyl or alkoxy having 1 to 15 carbon atoms, e.g. R 1 -R 6 Can be, independently of one another, methyl, methoxy, ethyl, ethoxy, propyl, propoxy, butyl, butoxy, pentyl, pentoxy, hexyl, hexyloxy or the like; preferably, R 1 -R 6 Independently of one another, methyl, ethyl, propyl, butyl, pentyl, methoxy, ethoxy, propoxy, butoxy or pentoxy; alternatively, R 1 -R 6 Independently of one another, alkenyl, alkenyloxy, alkynyl or alkynyloxy having from 2 to 15 carbon atoms, e.g. R 1 -R 6 Can be 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, 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-alkynyl, hex-5-ynyl, hept-1-alkynyl, hept-2-alkynyl, hept-3-alkynyl, hept-6-alkynyl, hept-4-alkynyl, or the like independently of each other; preferably, R 1 -R 6 Are, independently of one another, ethynyl, prop-1-ynyl, prop-2-ynyl, but-1-ynyl, but-2-ynyl and but-3-ynyl.
Further, in the present embodiment, R 1 -R 6 May be H, CN or CF 3 Monosubstituted, R 1 -R 6 One or more CH's in (C) 2 The radicals may be replaced 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 CF 2 -、-CHF-CHF-、-CH 2 O-、-OCH 2 -, -CF=CH-, -CH=CF-, -CF-, -CH=CH-, or-C≡C-zero-substituted or mono-substituted or polysubstituted, and the heteroatoms are not directly bonded, and the CH is substituted 2 H in the substituents of the radicals is zero-substituted or mono-substituted or polysubstituted by F, cl, br or I.
In an embodiment of the present invention, the compound represented by the formula I in the liquid crystal composition has higher optical anisotropy, low viscosity and higher negative dielectric anisotropy, the compound represented by the formula II has higher optical anisotropy, high clearing point and higher negative dielectric anisotropy, and the compound represented by the formula III has high optical anisotropy, medium clearing point, medium viscosity and higher negative dielectric anisotropy, and by matching the compound represented by the formula I, the compound represented by the formula II and the compound represented by the formula III to form the liquid crystal composition, the contrast ratio of the liquid crystal display device prepared by using the liquid crystal composition can be kept at a higher level, and the liquid crystal composition has better transmittance, so that the liquid crystal display device has better display effect even if the cell thickness of the liquid crystal cell in the liquid crystal display device is adjusted, thereby avoiding the difficult problem of difficult response speed improvement caused by the influence of the transmittance adjustment.
In one embodiment of the present invention, the compound represented by formula I is selected from one or more of the following compounds represented by the sub-formulae I-1 to I-3; the sub-formulae I-1 to I-3 are in particular:
wherein R is 1 And R is 2 Independently of one another H,F、Cl、Br、I、CN、SCN、NCS、SF 5 Or alkyl or alkoxy having 1 to 15 carbon atoms, e.g. R 1 -R 6 Can be, independently of one another, methyl, methoxy, ethyl, ethoxy, propyl, propoxy, butyl, butoxy, pentyl, pentoxy, hexyl, hexyloxy or the like; preferably, R 1 -R 6 Independently of one another, methyl, ethyl, propyl, butyl, pentyl, methoxy, ethoxy, propoxy, butoxy or pentoxy; or alkenyl, alkenyloxy, alkynyl or alkynyloxy having 2 to 15 carbon atoms, e.g. R 1 -R 6 Can be 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, 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-alkynyl, hex-5-ynyl, hept-1-alkynyl, hept-2-alkynyl, hept-3-alkynyl, hept-6-alkynyl, hept-4-alkynyl, or the like independently of each other; preferably, R 1 -R 6 Are, independently of one another, ethynyl, prop-1-ynyl, prop-2-ynyl, but-1-ynyl, but-2-ynyl and but-3-ynyl.
Further, R 1 And R is 2 Is zero-substituted or monosubstituted by H, CN or CF3, R 1 And R is 2 CH of (2) 2 The radicals being-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 CF 2 -、-CHF-CHF-、-CH 2 O-、-OCH 2 -, -CF=CH-, -CH=CF-, -CF-, -CH=CH-, or-C≡C-zero-substituted or mono-substituted or polysubstituted, and the heteroatoms are not directly bonded, and the CH is substituted 2 The H in the substituents of the radicals being zero-substituted or mono-substituted or polysubstituted by F, cl, br or IAnd (3) replacing.
In one embodiment of the present invention, the compound represented by formula II is selected from one or more of the compounds represented by the following sub-formulae II-1 to II-3; the sub-formulae II-1 to II-3 are specifically:
wherein R is 3 And R is 4 H, F, cl, br, I, CN, SCN, NCS, SF independently of each other 5 Or alkyl or alkoxy having 1 to 15 carbon atoms, e.g. R 1 -R 6 Can be, independently of one another, methyl, methoxy, ethyl, ethoxy, propyl, propoxy, butyl, butoxy, pentyl, pentoxy, hexyl, hexyloxy or the like; preferably, R 1 -R 6 Independently of one another, methyl, ethyl, propyl, butyl, pentyl, methoxy, ethoxy, propoxy, butoxy or pentoxy; or alkenyl, alkenyloxy, alkynyl or alkynyloxy having 2 to 15 carbon atoms, e.g. R 1 -R 6 Can be 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, 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-alkynyl, hex-5-ynyl, hept-1-alkynyl, hept-2-alkynyl, hept-3-alkynyl, hept-6-alkynyl, hept-4-alkynyl, or the like independently of each other; preferably, R 1 -R 6 Are, independently of one another, ethynyl, prop-1-ynyl, prop-2-ynyl, but-1-ynyl, but-2-ynyl and but-3-ynyl.
Further, R 3 And R is 4 Is H, CN or CF 3 Zero or mono-substituted, R 3 And R is 4 CH of (2) 2 Radicals (C)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 CF 2 -、-CHF-CHF-、-CH 2 O-、-OCH 2 -, -CF=CH-, -CH=CF-, -CF-, -CH=CH-, or-C≡C-zero-substituted or mono-substituted or polysubstituted, and the heteroatoms are not directly bonded, and the CH is substituted 2 H in the substituents of the radicals is zero-substituted or mono-substituted or polysubstituted by F, cl, br or I.
In one embodiment of the present invention, the liquid crystal composition further includes at least one compound represented by the following formula IV,
wherein R is 7 And R is 8 Independently of one another, alkyl or alkoxy having 1 to 10 carbon atoms, for example methyl, methoxy, ethyl, ethoxy, propyl, propoxy, butyl, butoxy, pentyl, pentoxy, hexyl or hexoxy, etc., or alkenyl, alkenyloxy, alkynyl or alkynyloxy having 2 to 10 carbon atoms, for example vinyl, prop-1-enyl, prop-2-enyl, ethynyl, prop-1-ynyl, prop-2-ynyl, etc.; in the present embodiment, R 7 And R is 8 May be mono-or polysubstituted with F, cl, br or I.
In this embodiment, the compound of formula IV has a low viscosity, and the compound of formula I, the compound of formula II, the compound of formula III, and the compound of formula IV are combined to improve the response speed of the liquid crystal display device manufactured using the liquid crystal composition while maintaining the display effect at a high level.
In one embodiment of the present invention, the liquid crystal composition further includes at least one compound represented by the following chemical formula V,
wherein R is 9 And R is 10 Independently of one another, alkyl or alkoxy having 1 to 10 carbon atoms, for example methyl, methoxy, ethyl, ethoxy, propyl, propoxy, butyl, butoxy, pentyl, pentoxy, hexyl or hexoxy, etc., or alkenyl, alkenyloxy, alkynyl or alkynyloxy having 2 to 10 carbon atoms, for example vinyl, prop-1-enyl, prop-2-enyl, ethynyl, prop-1-ynyl, prop-2-ynyl, etc.; in the present embodiment, R 9 And R is 10 May be mono-or polysubstituted with F, cl, br or I.
In this embodiment, the compound of formula V has high optical anisotropy and high clearing point, and by matching the compound of formula I, the compound of formula II, the compound of formula III, and the compound of formula V, the response speed of the liquid crystal display device manufactured using the liquid crystal composition can be improved while the display effect is maintained at a high level.
In one embodiment of the present invention, the liquid crystal composition further comprises at least one compound represented by the following formula VI,
wherein R is 11 And R is 12 Independently of one another, alkyl or alkoxy having 1 to 10 carbon atoms, for example methyl, methoxy, ethyl, ethoxy, propyl, propoxy, butyl, butoxy, pentyl, pentoxy, hexyl or hexoxy, etc., or alkenyl, alkenyloxy, alkynyl or alkynyloxy having 2 to 10 carbon atoms, for example vinyl, prop-1-enyl, prop-2-enyl, ethynyl, prop-1-ynyl, prop-2-ynyl, etc.; in the present embodiment, R 11 And R is 12 One or more H of (C) may be mono-substituted by F, cl, br or IMultiple substitutions.
In this embodiment, the compound of formula VI has high optical anisotropy and low viscosity, and the response speed of the liquid crystal display device prepared using the liquid crystal composition can be improved while the display effect is maintained at a high level by matching the compound of formula I, the compound of formula II, the compound of formula III, and the compound of formula VI.
In one embodiment of the present invention, the liquid crystal composition further comprises at least one compound represented by the following formula IV and at least one compound represented by the following formula V,
or comprises at least one compound represented by the following formula IV and at least one compound represented by the following formula VI,
or comprises at least one compound represented by the following chemical formula V and at least one compound represented by the following chemical formula VI,
wherein R is 7 -R 12 Independently of one another, alkyl or alkoxy having 1 to 10 carbon atoms, for example methyl, methoxy, ethyl, ethoxy, propyl, propoxy, butyl, butoxy, pentyl, pentoxy, hexyl or hexoxy, etc., or alkenyl, alkenyloxy, alkynyl or alkynyloxy having 2 to 10 carbon atoms, for example vinyl, prop-1-enyl, prop-2-enyl, ethynyl, prop-1-ynyl, prop-2-ynyl, etc.; in the present embodiment, R 7 -R 12 One of (a)Or a plurality of H's may be mono-or polysubstituted with F, cl, br or I.
In this embodiment, the compound represented by the formula I, the compound represented by the formula II, the compound represented by the formula III, and the compound represented by the formula IV are matched with the compound represented by the formula V, or the compound represented by the formula I, the compound represented by the formula II, the compound represented by the formula III, and the compound represented by the formula IV are matched with the compound represented by the formula VI, or the compound represented by the formula I, the compound represented by the formula II, the compound represented by the formula III, and the compound represented by the formula V are matched with the compound represented by the formula VI, so that the response speed of the liquid crystal display device manufactured by using the liquid crystal composition is improved while maintaining the display effect at a high level.
In one embodiment of the present invention, the liquid crystal composition further comprises at least one compound represented by the following formula IV, at least one compound represented by the following formula V, and at least one compound represented by the following formula VI,
wherein R is 7 -R 12 Independently of one another, alkyl or alkoxy having 1 to 10 carbon atoms, for example methyl, methoxy, ethyl, ethoxy, propyl, propoxy, butyl, butoxy, pentyl, pentoxy, hexyl or hexoxy, etc., or alkenyl, alkenyloxy, alkynyl or alkynyloxy having 2 to 10 carbon atoms, for example vinyl, prop-1-enyl, prop-2-enyl, ethynyl, prop-1-ynyl, prop-2-ynyl, etc.; in the present embodiment, R 7 -R 12 May be mono-or polysubstituted with F, cl, br or I.
In this embodiment, the compound represented by the formula I, the compound represented by the formula II, the compound represented by the formula III, and the compound represented by the formula IV, the compound represented by the formula V, and the compound represented by the formula VI are matched, so that the response speed of the liquid crystal display device manufactured using the liquid crystal composition is improved while the display effect is maintained at a high level.
In some embodiments of the present invention, the liquid crystal composition includes 1 to 50% of the compound represented by formula I, 1 to 40% of the compound represented by formula II, and 1 to 40% of the compound represented by formula III in weight percent. Preferably, the liquid crystal composition comprises 5-40% of the compound represented by formula I, 3-40% of the compound represented by formula II, and 1-30% of the compound represented by formula III; more preferably, the liquid crystal composition includes 10 to 30% of the compound represented by formula I, 5 to 35% of the compound represented by formula II, and 1 to 20% of the compound represented by formula III.
The liquid crystal composition according to the present invention will be explained in detail with reference to specific examples.
Example 1
The preparation method of the liquid crystal composition comprises the following steps:
(1) Preparing each compound according to each component in the liquid crystal composition and the corresponding mass percentage shown in the table below;
(2) Sequentially adding the compounds into a container from low melting point to high melting point, mixing, heating and stirring at 80 ℃ to fully mix the compounds to obtain a mixture;
(3) The mixture was cooled to room temperature and packaged to obtain a sample.
Thereafter, the correlation properties of the obtained samples were examined, and the results are shown in the following table, wherein Tni represents the clearing point (in degrees Celsius) of the liquid crystal composition, deltan represents the optical anisotropy at 25 degrees Celsius, and n e Represents the refractive index of extraordinary rays, gamma 1 represents the rotational viscosity (in mPas) at 25 ℃, delta epsilon represents the dielectric anisotropy at 25 ℃, epsilon ⊥ Representing the dielectric constant perpendicular to the long axis of the liquid crystal molecules.
The compounds and their proportions of the individual components of the liquid crystal compositions provided in this example, as well as the performance parameters of the liquid crystal compositions provided are shown in the table.
Specifically, response time of liquid crystalWherein γ1 is the rotational viscosity of the liquid crystal material, d is the thickness of the liquid crystal cell, Δεis the dielectric anisotropy of the liquid crystal, V th For the threshold voltage, K11 is the splay elastic modulus, K22 is the twist elastic modulus, and K33 is the bend elastic modulus. From the above formula, the response time of the liquid crystal is positively correlated with the rotational viscosity γ1, and negatively correlated with the dielectric anisotropy Δε, the splay elastic modulus K11, and the bend elastic modulus K33. The liquid crystal composition provided in this example had a rotational viscosity γ1 of 72 mPas, a dielectric anisotropy Δεof-2.7, a splay elastic modulus K11 of 14.3 and a bend elastic modulus K33 of 15.0. The liquid crystal composition provided by the application has larger negative dielectric constant delta epsilon, smaller rotational viscosity gamma 1, larger splay elastic coefficient K11 and larger bending elastic coefficient K33, so that the liquid crystal composition has quicker response time and is beneficial to improving the response speed of a liquid crystal display panel.
Meanwhile, as can be seen from the data in table 1, the liquid crystal composition has a larger Δn, i.e., the liquid crystal composition has a better optical anisotropy at 25 ℃, so that the transmittance of a liquid crystal cell formed from the liquid crystal composition is higher, thereby contributing to the improvement of the display effect of the liquid crystal display panel.
In addition, the liquid crystal composition provided in this example has a higher clearing point Tni (69 ℃), and thus has a wider operating temperature range and a higher maximum operating temperature.
In the liquid crystal composition provided in this embodiment, the compound represented by chemical formula i, the compound represented by chemical formula ii, and the compound represented by chemical formula iii have a larger polarity and a larger dielectric negativity, which helps to shorten the response time of the liquid crystal; meanwhile, the compound represented by the chemical formula I has the characteristics of higher optical anisotropy and low viscosity, the compound represented by the chemical formula II has the characteristics of higher optical anisotropy and high definition bright point, the compound represented by the chemical formula III has the characteristics of high optical anisotropy, medium definition bright point and medium viscosity, and the compounds represented by the chemical formula I, the chemical formula II and the chemical formula III in the liquid crystal composition can be properly adjusted according to actual needs so as to adjust various properties of the liquid crystal composition, so that the prepared liquid crystal composition can meet the problems of slower response speed and poor display effect of the conventional liquid crystal display panel.
Further, the compound represented by the chemical formula IV and the compound represented by the chemical formula V are further added into the liquid crystal composition provided in this embodiment, where the compound represented by the chemical formula IV has a low viscosity, the compound represented by the chemical formula V has a high optical anisotropy and a high-definition bright point, and the compounds represented by the chemical formula IV and the chemical formula V in the liquid crystal composition can be appropriately adjusted according to actual needs to adjust various properties of the liquid crystal composition, so that the prepared liquid crystal composition can meet the problems of improving the existing liquid crystal display panel that the response speed is slow and the display effect is poor.
In summary, the liquid crystal composition provided in the embodiment is beneficial to improving the response speed of the liquid crystal display panel, and meanwhile, if the thickness of the liquid crystal cell formed by the liquid crystal composition is reduced to improve the response speed of the liquid crystal display panel, the influence on the transmittance of the formed liquid crystal cell can be reduced, so that the prepared liquid crystal composition can improve the problem that the response speed of the conventional liquid crystal display panel is difficult to improve.
Example two
The preparation method of the liquid crystal composition comprises the following steps:
(1) Preparing each compound according to each component in the liquid crystal composition and the corresponding mass percentage shown in the table below;
(2) Sequentially adding the compounds into a container from low melting point to high melting point, mixing, heating and stirring at 80 ℃ to fully mix the compounds to obtain a mixture;
(3) The mixture was cooled to room temperature and packaged to obtain a sample.
Thereafter, the correlation properties of the obtained samples were examined, and the results are shown in the following table,
similarly, the liquid crystal composition provided in this embodiment is beneficial to improving the response speed of the liquid crystal display panel, and meanwhile, if the thickness of the liquid crystal cell formed by the liquid crystal composition is reduced to improve the response speed of the liquid crystal display panel, the influence on the transmittance of the formed liquid crystal cell can be reduced, so that the prepared liquid crystal composition can improve the problem that the response speed of the existing liquid crystal display panel is difficult to improve.
Example III
The preparation method of the liquid crystal composition comprises the following steps:
(1) Preparing each compound according to each component in the liquid crystal composition and the corresponding mass percentage shown in the table below;
(2) Sequentially adding the compounds into a container from low melting point to high melting point, mixing, heating and stirring at 80 ℃ to fully mix the compounds to obtain a mixture;
(3) The mixture was cooled to room temperature and packaged to obtain a sample.
Thereafter, the correlation properties of the obtained samples were examined, and the results are shown in the following table,
similarly, the liquid crystal composition provided in this embodiment is beneficial to improving the response speed of the liquid crystal display panel, and meanwhile, if the thickness of the liquid crystal cell formed by the liquid crystal composition is reduced to improve the response speed of the liquid crystal display panel, the influence on the transmittance of the formed liquid crystal cell can be reduced, so that the prepared liquid crystal composition can improve the problem that the response speed of the existing liquid crystal display panel is difficult to improve.
Example IV
The preparation method of the liquid crystal composition comprises the following steps:
(1) Preparing each compound according to each component in the liquid crystal composition and the corresponding mass percentage shown in the table below;
(2) Sequentially adding the compounds into a container from low melting point to high melting point, mixing, heating and stirring at 80 ℃ to fully mix the compounds to obtain a mixture;
(3) The mixture was cooled to room temperature and packaged to obtain a sample.
Thereafter, the correlation properties of the obtained samples were examined, and the results are shown in the following table,
similarly, the liquid crystal composition provided in this embodiment is beneficial to improving the response speed of the liquid crystal display panel, and meanwhile, if the thickness of the liquid crystal cell formed by the liquid crystal composition is reduced to improve the response speed of the liquid crystal display panel, the influence on the transmittance of the formed liquid crystal cell can be reduced, so that the prepared liquid crystal composition can improve the problem that the response speed of the existing liquid crystal display panel is difficult to improve.
Example five
The preparation method of the liquid crystal composition comprises the following steps:
(1) Preparing each compound according to each component in the liquid crystal composition and the corresponding mass percentage shown in the table below;
(2) Sequentially adding the compounds into a container from low melting point to high melting point, mixing, heating and stirring at 80 ℃ to fully mix the compounds to obtain a mixture;
(3) The mixture was cooled to room temperature and packaged to obtain a sample.
Thereafter, the correlation properties of the obtained samples were examined, and the results are shown in the following table,
similarly, the liquid crystal composition provided in this embodiment is beneficial to improving the response speed of the liquid crystal display panel, and meanwhile, if the thickness of the liquid crystal cell formed by the liquid crystal composition is reduced to improve the response speed of the liquid crystal display panel, the influence on the transmittance of the formed liquid crystal cell can be reduced, so that the prepared liquid crystal composition can improve the problem that the response speed of the existing liquid crystal display panel is difficult to improve.
Example six
The preparation method of the liquid crystal composition comprises the following steps:
(1) Preparing each compound according to each component in the liquid crystal composition and the corresponding mass percentage shown in the table below;
(2) Sequentially adding the compounds into a container from low melting point to high melting point, mixing, heating and stirring at 80 ℃ to fully mix the compounds to obtain a mixture;
(3) The mixture was cooled to room temperature and packaged to obtain a sample.
Thereafter, the correlation properties of the obtained samples were examined, and the results are shown in the following table,
similarly, the liquid crystal composition provided in this embodiment is beneficial to improving the response speed of the liquid crystal display panel, and meanwhile, if the thickness of the liquid crystal cell formed by the liquid crystal composition is reduced to improve the response speed of the liquid crystal display panel, the influence on the transmittance of the formed liquid crystal cell can be reduced, so that the prepared liquid crystal composition can improve the problem that the response speed of the existing liquid crystal display panel is difficult to improve.
Further, referring to fig. 1, the present invention further provides a liquid crystal display panel, which includes a first substrate 11, a second substrate 12, and a liquid crystal layer 13, wherein the first substrate 11 and the second substrate 12 are disposed opposite to each other, the liquid crystal layer 13 is disposed between the first substrate 11 and the second substrate 12, and the liquid crystal layer 13 includes the liquid crystal composition according to any one of the embodiments of the present invention. The liquid crystal display panel includes the liquid crystal composition according to any one of the embodiments of the present invention, so that the liquid crystal composition according to any one of the embodiments of the present invention has technical features and advantages, and detailed descriptions thereof are omitted herein with reference to the above embodiments. The liquid crystal display panel provided by the embodiment of the invention can be any one of a vertical alignment (Vertical alignment, VA) liquid crystal display panel, a birefringence control (Electrically Controlled Birefringence, ECB) liquid crystal display panel, a plasma addressing liquid crystal display panel (Plasma Addressed Liquid Crystal, PALC), a fringe field Switching (Fringe Field Switching, FFS) liquid crystal display panel, an In-Plane Switching (IPS) liquid crystal display panel, and the like.
The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to assist in understanding the methods of the present invention and the core ideas thereof; 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 compound represented by the following formula I;
at least one compound represented by the following chemical formula II; and
at least one compound represented by the following chemical formula III;
wherein Z is 1 And Z 2 Independently of one another, is a single bond, -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-; z is Z 1 And Z 2 Wherein H is zero substituted or mono substituted or polysubstituted by F, cl, br or I;
R 1 -R 6 h, F, cl, br, I, CN, SCN, NCS, SF independently of each other 5 Or alkyl or alkoxy having 1 to 15 carbon atoms, or alkenyl, alkenyloxy, alkynyl or alkynyloxy having 2 to 15 carbon atoms, wherein R 1 -R 6 Is H, CN or CF 3 Zero or mono-substituted, R 1 -R 6 CH of (2) 2 The radicals being-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 CF 2 -、-CHF-CHF-、-CH 2 O-、-OCH 2 -, -CF=CH-, -CH=CF-, -CF-, -CH=CH-, or-C≡C-zero-substituted or mono-substituted or polysubstituted, and the heteroatoms are not directly bonded, and the CH is substituted 2 H in the substituents of the radicals is zero-substituted or mono-substituted or polysubstituted by F, cl, br or I.
2. The liquid crystal composition according to claim 1, wherein the compound represented by the formula I is selected from one or more of the following compounds represented by the sub-formulae I-1 to I-3; the sub-formulae I-1 to I-3 are in particular:
wherein R is 1 And R is 2 H, F, cl, br, I, CN, SCN, NCS, SF independently of each other 5 Or alkyl or alkoxy having 1 to 15 carbon atoms, or alkenyl, alkenyloxy, alkynyl or alkynyloxy having 2 to 15 carbon atoms, wherein R 1 And R is 2 Is zero-substituted or monosubstituted by H, CN or CF3, R 1 And R is 2 CH of (2) 2 The radicals being-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 CF 2 -、-CHF-CHF-、-CH 2 O-、-OCH 2 -, -CF=CH-, -CH=CF-, -CF-, -CH=CH-, or-C≡C-zero-substituted or mono-substituted or polysubstituted, and the heteroatoms are not directly bonded, and the CH is substituted 2 H in the substituents of the radicals is zero-substituted or mono-substituted or polysubstituted by F, cl, br or I.
3. The liquid crystal composition according to claim 1, wherein the compound represented by the formula II is selected from one or more of the compounds represented by the following sub-formulae II-1 to II-3; the sub-formulae II-1 to II-3 are specifically:
wherein R is 3 And R is 4 H, F, cl, br, I, CN, SCN, NCS, SF independently of each other 5 Or alkyl or alkoxy having 1 to 15 carbon atoms, or alkenyl, alkenyloxy, alkynyl or alkynyloxy having 2 to 15 carbon atoms, wherein R 3 And R is 4 Is H, CN or CF 3 Zero or mono-substituted, R 3 And R is 4 CH of (2) 2 The radicals being-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 CF 2 -、-CHF-CHF-、-CH 2 O-、-OCH 2 -, -CF=CH-, -CH=CF-, -CF-, -CH=CH-, or-C≡C-zero-substituted or mono-substituted or polysubstituted, and the heteroatoms are not directly bonded, and the CH is substituted 2 H in the substituents of the radicals is zero-substituted or mono-substituted or polysubstituted by F, cl, br or I.
4. A liquid crystal composition according to any one of claims 1 to 3, further comprising at least one compound represented by the following formula IV,
wherein R is 7 And R is 8 Independently of one another, alkyl or alkoxy having 1 to 10 carbon atoms, or alkenyl, alkenyloxy, alkynyl or alkynyloxy having 2 to 10 carbon atoms; r is R 7 And R is 8 Wherein H is zero substituted or mono substituted or polysubstituted by F, cl, br or I.
5. A liquid crystal composition according to any one of claims 1 to 3, further comprising at least one compound represented by the following formula V,
wherein R is 9 And R is 10 Independently of one another, alkyl or alkoxy having 1 to 10 carbon atoms, or alkenyl, alkenyloxy, alkynyl or alkynyloxy having 2 to 10 carbon atoms; r is R 9 And R is 10 Wherein H is zero substituted or mono substituted or polysubstituted by F, cl, br or I.
6. A liquid crystal composition according to claim 1 to 3, further comprising at least one compound represented by the following formula VI,
wherein R is 11 And R is 12 Independently of one another, alkyl or alkoxy having 1 to 10 carbon atoms, or alkenyl, alkenyloxy, alkynyl or alkynyloxy having 2 to 10 carbon atoms; r is R 11 And R is 12 Wherein H is zero substituted or mono substituted or polysubstituted by F, cl, br or I.
7. A liquid crystal composition according to any one of claims 1 to 3, further comprising at least one compound represented by the following formula IV and at least one compound represented by the following formula V,
or comprises at least one compound represented by the following chemical formula IV and at least one compound represented by the following chemical formula VI,
or comprises at least one compound represented by the following chemical formula V and at least one compound represented by the following chemical formula VI,
wherein R is 7 -R 12 Independently of one another, alkyl or alkoxy having 1 to 10 carbon atoms, or alkenyl having 2 to 10 carbon atoms, alkenyloxy,Alkynyl or alkynyloxy; r is R 7 -R 12 Wherein H is zero substituted or mono substituted or polysubstituted by F, cl, br or I.
8. A liquid crystal composition according to any one of claims 1 to 3, further comprising at least one compound represented by the following formula IV, at least one compound represented by the following formula V, and at least one compound represented by the following formula VI,
wherein R is 7 -R 12 Independently of one another, alkyl or alkoxy having 1 to 10 carbon atoms, or alkenyl, alkenyloxy, alkynyl or alkynyloxy having 2 to 10 carbon atoms; r is R 7 -R 12 Wherein H is zero substituted or mono substituted or polysubstituted by F, cl, br or I.
9. The liquid crystal composition according to claim 1, wherein the liquid crystal composition comprises 1 to 50% by weight of the compound represented by formula I, 1 to 40% by weight of the compound represented by formula II, and 1 to 40% by weight of the compound represented by formula III; or (b)
The liquid crystal composition comprises 5-40% of a compound represented by a chemical formula I, 3-40% of a compound represented by a chemical formula II and 1-30% of a compound represented by a chemical formula III; or (b)
The liquid crystal composition comprises 10-30% of a compound represented by a chemical formula I, 5-35% of a compound represented by a chemical formula II and 1-20% of a compound represented by a chemical formula III.
10. A liquid crystal display panel comprising a first substrate, a second substrate, and a liquid crystal layer, wherein the first substrate and the second substrate are disposed opposite to each other, the liquid crystal layer is disposed between the first substrate and the second substrate, and the liquid crystal layer comprises the liquid crystal composition according to any one of claims 1 to 9.
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