CN109913236B - High-transmittance liquid crystal composition containing dioxygen heterocyclic compound and application thereof - Google Patents
High-transmittance liquid crystal composition containing dioxygen heterocyclic compound and application thereof Download PDFInfo
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- CN109913236B CN109913236B CN201711320043.8A CN201711320043A CN109913236B CN 109913236 B CN109913236 B CN 109913236B CN 201711320043 A CN201711320043 A CN 201711320043A CN 109913236 B CN109913236 B CN 109913236B
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 137
- 238000002834 transmittance Methods 0.000 title abstract description 26
- -1 dioxygen heterocyclic compound Chemical class 0.000 title description 11
- 229910001882 dioxygen Inorganic materials 0.000 title description 3
- 150000001875 compounds Chemical class 0.000 abstract description 253
- 125000000217 alkyl group Chemical group 0.000 description 27
- 125000003342 alkenyl group Chemical group 0.000 description 14
- 125000003545 alkoxy group Chemical group 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 7
- 230000003287 optical effect Effects 0.000 description 6
- 125000001140 1,4-phenylene group Chemical group [H]C1=C([H])C([*:2])=C([H])C([H])=C1[*:1] 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 5
- 238000002156 mixing Methods 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 238000005303 weighing Methods 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 125000000876 trifluoromethoxy group Chemical group FC(F)(F)O* 0.000 description 2
- 125000005451 3-fluoro-1,4-phenylene group Chemical group [H]C1=C([*:1])C([H])=C(F)C([*:2])=C1[H] 0.000 description 1
- 101100019424 Solanum tuberosum IVD gene Proteins 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- HGCIXCUEYOPUTN-UHFFFAOYSA-N cyclohexene Chemical compound C1CCC=CC1 HGCIXCUEYOPUTN-UHFFFAOYSA-N 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011978 dissolution method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 125000001153 fluoro group Chemical group F* 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000002390 rotary evaporation Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
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- Liquid Crystal Substances (AREA)
Abstract
The invention relates to a high-transmittance liquid crystal composition containing a dioxyheterocyclic compound and application thereof. The liquid crystal composition provided by the invention has large vertical dielectric, further has a lower ratio of parallel dielectric to vertical dielectric, and further has higher transmittance. Therefore, the liquid crystal composition provided by the invention is suitable for IPS or FFS type TFT liquid crystal display devices, can obviously improve the transmittance of a liquid crystal display and reduce the energy loss of a backlight source, and is particularly suitable for FFS type liquid crystal displays.
Description
Technical Field
The invention relates to a liquid crystal composition, in particular to a liquid crystal composition which can obviously improve the transmittance of a liquid crystal display when being used in the liquid crystal display.
Background
At present, the technology of LCD products has matured, and the technical problems of viewing angle, resolution, color saturation and brightness, etc. are successfully solved, and the display performance of the LCD products is close to or exceeds that of CRT displays. Large-sized and medium-sized LCDs have gradually occupied the mainstream position of flat panel displays in their respective fields. The liquid crystal belongs to passive luminous display, that is to say, the liquid crystal panel plays the effect of photoswitch, and the transmittance is about 6% behind the light passing through the liquid crystal panel, in order to promote luminance, need strengthen backlight luminance, and then need consume more electric energy and be used for promoting backlight luminance, and this energy consumption that has promoted backlight has greatly, and liquid crystal display's energy consumption is used for the backlight more than 95%, and it is very effective to reducing liquid crystal display's energy consumption to promote liquid crystal display's transmittance. With the increasing emphasis on energy consumption and environmental protection, the problem of reducing the energy consumption of the liquid crystal display is more concerned. Therefore, the improvement of the transmittance of the liquid crystal panel becomes the focus of the current liquid crystal display.
Specifically, epsilon of the liquid crystal composition is reduced for IPS (in-plane switching) and FFS (fringe field effect) mode displays||/ε⊥(ratio of parallel dielectric to perpendicular dielectric) is effective in enhancing the transmittance of the liquid crystal display. The liquid crystal composition provided by the invention effectively reduces epsilon of the liquid crystal composition||/ε⊥The effect of improving the transmittance is achieved.
Disclosure of Invention
The liquid crystal composition provided by the invention effectively reduces epsilon of the liquid crystal composition||/ε⊥(the ratio of parallel dielectric to perpendicular dielectric) has good effect of increasing transmittance. In particular, the liquid crystal composition provided by the invention has large vertical dielectric and further has high transmittance.
Specifically, the present invention provides a liquid crystal composition comprising at least one compound represented by the general formula I:
wherein R is1Independently represent C1～C12Linear alkyl, linear alkoxy or C2～C12A linear alkenyl group of (a); x1Each independently represent F, CF3、OCF3；
And at least one compound represented by the general formula II:
wherein R is2、R3Each independently represents C1～C12Linear alkyl, linear alkoxy or C2～C12A linear alkenyl group of (a); a. the1Each independently represents trans-1, 4-cyclohexyl or 1, 4-phenylene; a. the2Each independently represents trans-1, 4-cyclohexyl, 1, 4-cyclohexene, 1, 4-phenylene, 2-fluoro-1, 4-phenylene or 3-fluoro-1, 4-phenylene; n is 0 or 1.
And at least one compound represented by the general formula III:
wherein R is4、R5Independently represent C1～C12Linear alkyl, linear alkoxy or C2～C12A linear alkenyl group of (a); a. the3、A4Each independently represents trans-1, 4-cyclohexyl or 1, 4-phenylene;
and at least one compound represented by the general formula IV:
wherein R is6Each independently represents C1～C12Linear alkyl, linear alkoxy or C2～C12A linear alkenyl group of (a); m and l each independently represent 0 or 1; l is1Each independently represents H or CH3；L2Each independently represents H or F.
The compound represented by the general formula I has large optical anisotropy and large dielectric anisotropy.
Specifically, the compounds represented by formula I are selected from one or more of formulas IA through IC:
wherein R is1Each independently represents C1～C7The linear alkyl group of (1);
preferably, the compound represented by the general formula I is selected from one or more of IA 1-IC 5:
more preferably, the compound represented by the general formula I is selected from one or more of IA2, IA3, IA5, IC2 and IC 3; one or both of IA2 and IA3 are particularly preferred.
The structure represented by the general formula II provided by the invention is a liquid crystal compound containing a2, 3-difluorobenzene structure, the structure has large vertical dielectric, and can effectively improve the vertical dielectric of a liquid crystal composition, and specifically, the compound represented by the general formula II is selected from one or more of IIA-IIF:
wherein R is2Represents C1～C7Straight chain alkyl or C2～C7A linear alkenyl group of (a); r3Represents C1～C7Linear alkyl or linear alkoxy groups of (1).
Preferably, the compound represented by the general formula II is selected from one or more of IIA 1-IIF 16:
more preferably, the compound represented by the general formula II is selected from one or more of IIA8, IIA10, IIA20, IIB9, IIB19, IIC1, IIC2, IIC14, IIC19, IIC20, IIC21, IIC22, IIC26, IID20, IID26, IIE19, IIE20, IIE32, IIF14 and IIF 21; particularly, one or more of IIA8, IIB9, IIC19, IIC20, IIC21, IID20, IIE19, IIE20 and IIF14 are preferable.
The compound represented by the general formula III provided by the invention has very low rotational viscosity, and specifically, the compound represented by the general formula III is selected from one or more of IIIA-IIIC:
wherein R is4Each independently represents C1～C7The linear alkyl group of (1); r5Each independently represents C1～C7Linear alkyl, linear alkoxy or C2～C7Linear alkenyl groups of (a).
Preferably, the compound represented by formula III is selected from one or more of formulae IIIA1 to IIIC 38:
more preferably, the compound represented by the general formula III is selected from one or more of formulae IIIA2, IIIA4, IIIA6, IIIA8, IIIA14, IIIA22, IIIA26, IIIA27, IIIB14, IIIB18, IIIB22, IIIC2, IIIC4, IIIC6, IIIC22, IIIC26, IIIC29, IIIC 30; particularly preferably one or more of IIIA2, IIIA6, IIIA14, IIIB22, IIIC4, IIIC29 and IIIC 30.
The compound represented by the general formula IV provided by the invention is a polar compound containing a dioxygen heterocyclic structure, has large dielectric anisotropy and vertical dielectric, simultaneously provides the dielectric anisotropy and the vertical dielectric of the liquid crystal composition, and improves the transmittance of a liquid crystal display.
Specifically, the compound represented by the general formula IV is selected from one or more of IVA to IVH:
wherein R is6Each independently represents C1～C7The linear alkyl group of (1); preferably C2～C5Linear alkyl group of (1). Preferably, the compound represented by formula IV is selected from one or more of IVA 1-IVH 4:
more preferably, the compound represented by formula IV is selected from one or more of IVA2, IVA3, IVB2, IVB3, IVC2, IVC3, IVD2, IVD3, IVE2, IVE3, IVF2, IVF3, IVG2, IVH 2; further preferred are one or more of IVA2, IVA3, IVB2, IVB 3.
The liquid crystal composition provided by the invention also comprises one or more compounds represented by the general formula V:
wherein R is7、R8Each independently represents C1～C12Linear alkyl, linear alkoxy or C2～C12A linear alkenyl group of (a); a. the5Each independently represents trans-1, 4-cyclohexyl or 1, 4-phenylene.
The compound represented by the general formula V is a tricyclic neutral monomer, and specifically, the compound represented by the general formula V is selected from one or more of VA to VC:
in the general formulae VA to VB: r7Independently represent C2～C7Straight chain alkyl or C2～C7A linear alkenyl group; r8Independently represent C1～C8Linear alkyl group of (1).
Further preferably, the compound represented by the general formula V is selected from one or more compounds represented by general formulas VA1 to VA18, VB1 to VB 22:
more preferably, the compounds of formula V provided by the present invention are selected from one or more of formulae VA1, VA2, VA8, VA12, VA16, VB5, VB12, VB16, VB 18; particular preference is given to one or more of the formulae VA1, VA2, VA8, VB12, VB 16.
The liquid crystal composition provided by the invention also comprises one or more compounds represented by the general formula VI:
wherein R is9Each independently represents C1～C12Linear alkyl, linear alkoxy or C2～C12A linear alkenyl group of (a); a. the6Each independently represents trans-1, 4-cyclohexyl or 1, 4-phenylene in which one or more H atoms on the phenyl ring are replaced by F atoms.
Specifically, the compound represented by formula VI is selected from one or more of VIA to VIG:
wherein R is9Each independently represents C1～C7Linear alkyl, linear alkoxy or C2～C7A linear alkenyl group of (a); more preferably C2～C5Linear alkyl group of (1).
The liquid crystal composition provided by the invention also comprises one or more compounds represented by the general formula VII:
wherein R is10Each independently represents C1～C12Linear alkyl, linear alkoxy or C2～C12A linear alkenyl group of (a); l is3、L4Independently represents F or H; x2Each independently represents F or OCF3；A7Each independently represents trans-1, 4-cyclohexyl or 1, 4-phenylene.
Specifically, the compound represented by the general formula VII is selected from one or more of VIIA to VIIH:
wherein R is10Each independently represents C1～C7The linear alkyl group of (1); preferably C2～C5Linear alkyl group of (1).
The liquid crystal composition provided by the invention also comprises one or more compounds represented by the general formula VIII:
wherein R is11、R12Each independently represents C1～C12Straight chain alkyl or C2～C12A linear alkenyl group of (a); l is5Each independently represents H or F.
The compound represented by the general formula VIII has a large optical anisotropy and a high clearing point; specifically, the compound represented by the general formula VIII is selected from one or more of VIIIA or VIIIB.
Wherein R is11、R12Each independently represents C1～C7The linear alkyl group of (1); preferably C2～C5Linear alkyl group of (1).
The liquid crystal composition provided by the invention also comprises one or more compounds represented by the general formula IX:
wherein R is13Each independently represents C1～C12Straight chain alkyl or C2～C12A linear alkenyl group of (a); r14Each independently represent F, C1～C12Straight chain alkyl or C2～C12A linear alkenyl group of (a);
the compound represented by the general formula IX has a large optical anisotropy, and specifically, the compound represented by the general formula IX is selected from one or more of IXA to IXE:
wherein R is13、R14Each independently represents C1～C7The linear alkyl group of (1); preferably C1～C5Linear alkyl group of (1).
Specifically, the liquid crystal composition of the present invention preferably comprises the following components by weight:
(1) 1-30% of a compound represented by general formula I;
(2) 1-40% of a compound represented by general formula II;
(3)20 to 70% of a compound represented by the general formula III;
(4)1 to 30% of a compound represented by the general formula IV;
(5)0 to 35% of a compound represented by the general formula V;
(6)0 to 15% of a compound represented by the general formula VI;
(7)0 to 15% of a compound represented by the general formula VII;
(8)0 to 15% of a compound represented by general formula VIII;
(9)0 to 20% of a compound represented by the general formula IX.
Preferably, the liquid crystal composition comprises the following components in percentage by weight:
(1) 2-25% of a compound represented by general formula I;
(2) 3-32% of a compound represented by general formula II;
(3) 40-65% of a compound represented by the general formula III;
(4) 1-22% of a compound represented by formula IV;
(5)0 to 25% of a compound represented by the general formula V;
(6)0 to 10% of a compound represented by the general formula VI;
(7)0 to 10% of a compound represented by the general formula VII;
(8)0 to 10% of a compound represented by the general formula VIII;
(9)0 to 15% of a compound represented by the general formula IX.
More preferably, the liquid crystal composition comprises the following components in percentage by weight:
(1) 3-17% of a compound represented by general formula I;
(2) 5-27% of a compound represented by general formula II;
(3) 46-59% of a compound represented by the general formula III;
(4) 1.5-17% of a compound represented by formula IV;
(5)0 to 19% of a compound represented by the general formula V;
(6)0 to 5% of a compound represented by the general formula VI;
(7)0 to 6% of a compound represented by the general formula VII;
(8)0 to 5% of a compound represented by the general formula VIII;
(9)0 to 10% of a compound represented by the general formula IX.
Preferably, the liquid crystal composition comprises the following components in percentage by weight:
(1) 11-23% of a compound represented by general formula I;
(2) 5-32% of a compound represented by general formula II;
(3) 40-60% of a compound represented by the general formula III;
(4) 1-20% of a compound represented by formula IV;
(5)0 to 18% of a compound represented by the general formula V;
(6)0 to 9% of a compound represented by the general formula VI;
(7)0 to 10% of a compound represented by the general formula VII;
(8)0 to 10% of a compound represented by the general formula VIII;
(9)0 to 15% of a compound represented by the general formula IX.
More preferably, the liquid crystal composition comprises the following components in percentage by weight:
(1) 11-17% of a compound represented by formula I;
(2) 10-27% of a compound represented by general formula II;
(3) 46-54% of a compound represented by the general formula III;
(4) 1.5-17% of a compound represented by formula IV;
(5)0 to 12% of a compound represented by the general formula V;
(6)0 to 4% of a compound represented by the general formula VI;
(7)0 to 6% of a compound represented by the general formula VII;
(8)0 to 5% of a compound represented by the general formula VIII;
(9)0 to 10% of a compound represented by the general formula IX.
Preferably, the liquid crystal composition comprises the following components in percentage by weight:
(1) 2-12% of a compound represented by general formula I;
(2) 3-32% of a compound represented by general formula II;
(3) 40-65% of a compound represented by the general formula III;
(4) 1-23% of a compound represented by formula IV;
(5)0 to 23% of a compound represented by the general formula V;
(6)0 to 10% of a compound represented by the general formula VI;
(7)0 to 10% of a compound represented by the general formula VII;
(8)0 to 10% of a compound represented by the general formula VIII;
(9)0 to 15% of a compound represented by the general formula IX.
More preferably, the liquid crystal composition comprises the following components in percentage by weight:
(1) 3-12% of a compound represented by general formula I;
(2) 5-27% of a compound represented by general formula II;
(3) 46-59% of a compound represented by the general formula III;
(4) 4-17% of a compound represented by formula IV;
(5)0 to 19% of a compound represented by the general formula V;
(6)0 to 5% of a compound represented by the general formula VI;
(7)0 to 6% of a compound represented by the general formula VII;
(8)0 to 5% of a compound represented by the general formula VIII;
(9)0 to 9% of a compound represented by the general formula IX.
Preferably, the liquid crystal composition comprises the following components in percentage by weight:
(1) 2-22% of a compound represented by general formula I;
(2) 14-32% of a compound represented by general formula II;
(3) 45-65% of a compound represented by general formula III;
(4) 1-12% of a compound represented by formula IV;
(5)0 to 20% of a compound represented by the general formula V;
(6)0 to 10% of a compound represented by the general formula VI;
(7)0 to 10% of a compound represented by the general formula VII;
(8)0 to 10% of a compound represented by the general formula VIII;
(9)0 to 14% of a compound represented by the general formula IX.
More preferably, the liquid crystal composition comprises the following components in percentage by weight:
(1) 3-17% of a compound represented by general formula I;
(2) 14-27% of a compound represented by general formula II;
(3) 50-59% of a compound represented by the general formula III;
(4)1.5 to 7% of a compound represented by the general formula IV;
(5)0 to 16% of a compound represented by the general formula V;
(6)0 to 5% of a compound represented by the general formula VI;
(7)0 to 5% of a compound represented by the general formula VII;
(8)0 to 5% of a compound represented by the general formula VIII;
(9)0 to 9% of a compound represented by the general formula IX.
Preferably, the liquid crystal composition comprises the following components in percentage by weight:
(1) 2-22% of a compound represented by general formula I;
(2) 3-15% of a compound represented by general formula II;
(3) 40-65% of a compound represented by the general formula III;
(4) 3-22% of a compound represented by formula IV;
(5)0 to 24% of a compound represented by the general formula V;
(6)0 to 10% of a compound represented by the general formula VI;
(7)0 to 12% of a compound represented by the general formula VII;
(8)0 to 10% of a compound represented by the general formula VIII;
(9)0 to 15% of a compound represented by the general formula IX.
More preferably, the liquid crystal composition comprises the following components in percentage by weight:
(1) 3-17% of a compound represented by general formula I;
(2) 5-15% of a compound represented by general formula II;
(3) 46-59% of a compound represented by the general formula III;
(4) 4-17% of a compound represented by formula IV;
(5)0 to 19% of a compound represented by the general formula V;
(6)0 to 5% of a compound represented by the general formula VI;
(7)0 to 6% of a compound represented by the general formula VII;
(8)0 to 5% of a compound represented by the general formula VIII;
(9)0 to 10% of a compound represented by the general formula IX.
Preferably, the liquid crystal composition comprises the following components in percentage by weight:
(1) 2-22% of a compound represented by general formula I;
(2) 5-32% of a compound represented by general formula II;
(3) 45-65% of a compound represented by general formula III;
(4) 1-7% of a compound represented by formula IV;
(5)0 to 20% of a compound represented by the general formula V;
(6)0 to 10% of a compound represented by the general formula VI;
(7)0 to 8% of a compound represented by the general formula VII;
(8)0 to 9% of a compound represented by the general formula VIII;
(9)0 to 15% of a compound represented by the general formula IX.
More preferably, the liquid crystal composition comprises the following components in percentage by weight:
(1) 3-17% of a compound represented by general formula I;
(2) 9-27% of a compound represented by general formula II;
(3) 50-59% of a compound represented by the general formula III;
(4) 1-7% of a compound represented by formula IV;
(5)0 to 16% of a compound represented by the general formula V;
(6)0 to 5% of a compound represented by the general formula VI;
(7)0 to 5% of a compound represented by the general formula VII;
(8)0 to 5% of a compound represented by the general formula VIII;
(9)0 to 9% of a compound represented by the general formula IX.
Preferably, the liquid crystal composition comprises the following components in percentage by weight:
(1) 2-21% of a compound represented by general formula I;
(2) 3-31% of a compound represented by general formula II;
(3) 40-65% of a compound represented by the general formula III;
(4) 5-22% of a compound represented by formula IV;
(5)0 to 24% of a compound represented by the general formula V;
(6)0 to 8% of a compound represented by the general formula VI;
(7)0 to 9% of a compound represented by the general formula VII;
(8)0 to 10% of a compound represented by the general formula VIII;
(9)0 to 15% of a compound represented by the general formula IX.
More preferably, the liquid crystal composition comprises the following components in percentage by weight:
(1) 3-17% of a compound represented by general formula I;
(2) 5-27% of a compound represented by general formula II;
(3) 46-59% of a compound represented by the general formula III;
(4) 5-17% of a compound represented by formula IV;
(5)0 to 19% of a compound represented by the general formula V;
(6)0 to 5% of a compound represented by the general formula VI;
(7)0 to 6% of a compound represented by the general formula VII;
(8)0 to 5% of a compound represented by the general formula VIII;
(9)0 to 10% of a compound represented by the general formula IX.
Preferably, the liquid crystal composition comprises the following components in percentage by weight:
(1) 2-19% of a compound represented by general formula I;
(2) 3-28% of a compound represented by general formula II;
(3) 40-65% of a compound represented by the general formula III;
(4) 1-22% of a compound represented by formula IV;
(5)1 to 25% of a compound represented by the general formula V;
(6)0 to 8% of a compound represented by the general formula VI;
(7)0 to 10% of a compound represented by the general formula VII;
(8)0 to 9% of a compound represented by the general formula VIII;
(9)0 to 12% of a compound represented by the general formula IX.
More preferably, the liquid crystal composition comprises the following components in percentage by weight:
(1) 3-14% of a compound represented by general formula I;
(2) 5-23% of a compound represented by general formula II;
(3) 46-59% of a compound represented by the general formula III;
(4) 2-17% of a compound represented by formula IV;
(5) 2-19% of a compound represented by formula V;
(6)0 to 5% of a compound represented by the general formula VI;
(7)0 to 6% of a compound represented by the general formula VII;
(8)0 to 5% of a compound represented by the general formula VIII;
(9)0 to 6% of a compound represented by the general formula IX.
Preferably, the liquid crystal composition comprises the following components in percentage by weight:
(1) 5-122% of a compound represented by general formula I;
(2) 8-32% of a compound represented by general formula II;
(3) 43-59% of a compound represented by the general formula III;
(4)1 to 14% of a compound represented by the general formula IV;
(5)0 to 8% of a compound represented by the general formula VI;
(6)0 to 9% of a compound represented by the general formula VII;
(7)0 to 10% of a compound represented by the general formula VIII;
(8)0 to 15% of a compound represented by the general formula IX.
More preferably, the liquid crystal composition comprises the following components in percentage by weight:
(1) 8-17% of a compound represented by general formula I;
(2) 12-27% of a compound represented by general formula II;
(3) 48-54% of a compound represented by the general formula III;
(4) 1-9% of a compound represented by formula IV;
(5)0 to 4% of a compound represented by the general formula VI;
(6)0 to 5% of a compound represented by the general formula VII;
(7)0 to 5% of a compound represented by the general formula VIII;
(8)0 to 10% of a compound represented by the general formula IX.
As one of the preferred embodiments of the present invention, the liquid crystal composition comprises the following components in percentage by weight:
(1) 8-16% of a compound represented by general formula I;
(2) 25-27% of a compound represented by formula II;
(3) 52-53% of a compound represented by the general formula III;
(4)1.5 to 5% of a compound represented by the general formula IV;
(6)0 to 2.5% of a compound represented by the general formula VII;
(7)0 to 9% of a compound represented by the general formula IX;
or, the liquid crystal composition comprises the following components in percentage by weight:
(1) 4-17% of a compound represented by general formula I;
(2) 5-27% of a compound represented by general formula II;
(3) 46-54% of a compound represented by the general formula III;
(4) 1.5-17% of a compound represented by formula IV;
(5)0 to 19% of a compound represented by the general formula V;
(6)0 to 5% of a compound represented by the general formula VI;
(7)0 to 4% of a compound represented by the general formula VII;
(8)0 to 5% of a compound represented by the general formula VIII;
(9)0 to 10% of a compound represented by the general formula IX;
or, the liquid crystal composition comprises the following components in percentage by weight:
(1) 3-14% of a compound represented by general formula I;
(2) 15-25% of a compound represented by general formula II;
(3) 52-59% of a compound represented by the general formula III;
(4) 2-7% of a compound represented by formula IV;
(5)0 to 10% of a compound represented by the general formula V;
(6)0 to 5% of a compound represented by the general formula VI;
(7)0 to 5% of a compound represented by the general formula VII;
(8)0 to 5% of a compound represented by the general formula VIII;
(9)0 to 4% of a compound represented by the general formula IX;
or, the liquid crystal composition comprises the following components in percentage by weight:
(1) 7-11% of a compound represented by general formula I;
(2) 9-23% of a compound represented by general formula II;
(3) 51-56% of a compound represented by the general formula III;
(4) 4-8% of a compound represented by formula IV;
(5) 2-13% of a compound represented by formula V;
(6)0 to 5% of a compound represented by the general formula VI;
(7)0 to 6% of a compound represented by the general formula VII;
(8)0 to 5% of a compound represented by the general formula VIII;
(9) 2-5% of a compound represented by formula IX.
The compound represented by the general formula I in the liquid crystal composition provided by the invention is a polyfluoro-substituted terphenyl structure compound, the compound has large dielectric anisotropy and optical anisotropy and is very effective for improving the dielectric anisotropy and the optical anisotropy of the liquid crystal composition, the structure represented by the general formula II comprises a2, 3-difluorobenzene structure compound, the compound has large vertical dielectric, and the compound is very effective for improving the vertical dielectric of the liquid crystal composition and improving the transmittance of a liquid crystal display; the compound represented by the general formula III is of a dicyclohexyl structure, has the characteristics of low rotational viscosity and excellent intersolubility, and is an essential component for fast response liquid crystal display; the structure represented by the general formula IV is a tricyclic neutral liquid crystal compound which has a high clearing point and a large elastic constant and is very effective in improving the clearing point and the elastic constant of the liquid crystal composition.
The method for producing the liquid crystal composition of the present invention is not particularly limited, and it can be produced by mixing two or more compounds by a conventional method, such as a method of mixing the different components at a high temperature and dissolving each other, wherein the liquid crystal composition is dissolved and mixed in a solvent for the compounds, and then the solvent is distilled off under reduced pressure; alternatively, the liquid crystal composition of the present invention can be prepared by a conventional method, for example, by dissolving the component having a smaller content in the main component having a larger content at a higher temperature, or by dissolving each of the components in an organic solvent, for example, acetone, chloroform or methanol, and then mixing the solutions to remove the solvent.
The liquid crystal composition provided by the invention has large vertical dielectric, further has a lower ratio of parallel dielectric to vertical dielectric, and further has higher transmittance. Therefore, the liquid crystal composition provided by the invention is suitable for IPS or FFS type TFT liquid crystal display devices, can obviously improve the transmittance of a liquid crystal display and reduce the energy loss of a backlight source, and is particularly suitable for FFS type liquid crystal displays.
Detailed Description
The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Unless otherwise indicated, percentages in the present invention are weight percentages; the temperature units are centigrade; Δ n represents optical anisotropy (25 ℃); Δ ε represents the dielectric anisotropy (25 ℃, 1000 Hz); γ 1 represents rotational viscosity (mpa.s, 25 ℃); cp represents the clearing point (. degree. C.) of the liquid crystal composition; k11、K22、K33Respectively represent exhibitionBending, torsion and bending elastic constants (pN, 25 ℃).
In the following examples, the group structures in the liquid crystal compounds are represented by codes shown in Table 1.
Table 1: radical structure code of liquid crystal compound
Take the following compound structure as an example:
In the following examples, the liquid crystal composition was prepared by a thermal dissolution method, comprising the steps of: weighing the liquid crystal compound by a balance according to the weight percentage, wherein the weighing and adding sequence has no specific requirements, generally weighing and mixing the liquid crystal compound in sequence from high melting point to low melting point, heating and stirring at 60-100 ℃ to uniformly melt all the components, filtering, performing rotary evaporation, and finally packaging to obtain the target sample.
In the following examples, the weight percentages of the components in the liquid crystal composition and the performance parameters of the liquid crystal composition are shown in the following tables.
Example 1
Table 2: the weight percentage and performance parameters of each component in the liquid crystal composition
Example 2
Table 3: the weight percentage and performance parameters of each component in the liquid crystal composition
Example 3
Table 4: the weight percentage and performance parameters of each component in the liquid crystal composition
Example 4
Table 5: the weight percentage and performance parameters of each component in the liquid crystal composition
Example 5
Table 6: the weight percentage and performance parameters of each component in the liquid crystal composition
Example 6
Table 7: the weight percentage and performance parameters of each component in the liquid crystal composition
Example 7
Table 8: the weight percentage and performance parameters of each component in the liquid crystal composition
Example 8
Table 9: the weight percentage and performance parameters of each component in the liquid crystal composition
Example 9
Table 10: the weight percentage and performance parameters of each component in the liquid crystal composition
Example 10
Table 11: the weight percentage and performance parameters of each component in the liquid crystal composition
Example 11
Table 12: the weight percentage and performance parameters of each component in the liquid crystal composition
Example 12
Table 13: the weight percentage and performance parameters of each component in the liquid crystal composition
Example 13
Table 14: the weight percentage and performance parameters of each component in the liquid crystal composition
Example 14
Table 15: the weight percentage and performance parameters of each component in the liquid crystal composition
Example 15
Table 16: the weight percentage and performance parameters of each component in the liquid crystal composition
Example 16
Table 17: the weight percentage and performance parameters of each component in the liquid crystal composition
Example 17
Table 18: the weight percentage and performance parameters of each component in the liquid crystal composition
Example 18
Table 19: the weight percentage and performance parameters of each component in the liquid crystal composition
Example 19
Table 20: the weight percentage and performance parameters of each component in the liquid crystal composition
Example 20
Table 21: the weight percentage and performance parameters of each component in the liquid crystal composition
Example 21
Table 22: the weight percentage and performance parameters of each component in the liquid crystal composition
Example 22
Table 23: the weight percentage and performance parameters of each component in the liquid crystal composition
Example 23
Table 24: the weight percentage and performance parameters of each component in the liquid crystal composition
Example 24
Table 25: the weight percentage and performance parameters of each component in the liquid crystal composition
Example 25
Table 26: the weight percentage and performance parameters of each component in the liquid crystal composition
Example 26
Table 27: the weight percentage and performance parameters of each component in the liquid crystal composition
Comparative example 1
Table 28: the weight percentage and performance parameters of each component in the liquid crystal composition
Compared with comparative example 1, examples 1 and 3 have larger vertical dielectric, thereby being beneficial to improving the transmittance of the liquid crystal display.
Transmittance simulations were performed for examples 1, 3 and comparative example 1 to obtain the following data table 29:
TABLE 29 comparison of the transmittances of example 1, example 3 and comparative example 1
| Example 1 | Example 3 | Comparative example 1 | |
| Transmittance of light | 0.3009 | 0.3034 | 0.2866 |
The transmittance of example 1 is improved by about 5.0% compared with that of comparative example 1, and the transmittance of example 3 is improved by about 6% compared with that of comparative example 1. Examples 2, 4 to 26 also had high transmittance, and the detection results were almost the same as those in examples 1 and 3.
From the above embodiments, the liquid crystal composition provided by the present invention has a large vertical dielectric, and further has a lower ratio of parallel dielectric to vertical dielectric, and further has a higher transmittance. Therefore, the liquid crystal composition provided by the invention is suitable for IPS or FFS type TFT liquid crystal display devices, can obviously improve the transmittance of a liquid crystal display and reduce the energy loss of a backlight source, and is particularly suitable for FFS type liquid crystal displays.
Although the invention has been described in detail hereinabove with respect to a general description and specific embodiments thereof, it will be apparent to those skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
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