CN114525140A - Fast response negative liquid crystal composition and application thereof - Google Patents
Fast response negative liquid crystal composition and application thereof Download PDFInfo
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- CN114525140A CN114525140A CN202210167837.XA CN202210167837A CN114525140A CN 114525140 A CN114525140 A CN 114525140A CN 202210167837 A CN202210167837 A CN 202210167837A CN 114525140 A CN114525140 A CN 114525140A
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 131
- 239000000203 mixture Substances 0.000 title claims abstract description 85
- 150000001875 compounds Chemical class 0.000 claims abstract description 191
- 125000004432 carbon atom Chemical group C* 0.000 claims description 36
- 125000003545 alkoxy group Chemical group 0.000 claims description 16
- 125000000217 alkyl group Chemical group 0.000 claims description 16
- 125000003342 alkenyl group Chemical group 0.000 claims description 6
- BKYOIMKDXAUYEQ-UHFFFAOYSA-N BL II Chemical compound CC(=O)OC=1C(OC(C)=O)=C2C=3C=C(OC(C)=O)C(OC(=O)C)=CC=3OC2=C(OC(C)=O)C=1C1=CC=C(O)C=C1 BKYOIMKDXAUYEQ-UHFFFAOYSA-N 0.000 claims description 2
- DTOIFOOSMQSUBD-UHFFFAOYSA-N BL IV Chemical compound CC(=O)OC1=C(OC(C)=O)C(C2=CC(O)=C(O)C=C2O2)=C2C(OC(C)=O)=C1C1=CC=C(O)C=C1 DTOIFOOSMQSUBD-UHFFFAOYSA-N 0.000 claims description 2
- RCCVHCHMVALAKN-UHFFFAOYSA-N BL III Chemical compound C1=CC(OC(=O)C)=CC=C1C1=C(OC(C)=O)C(OC(C)=O)=C2C3=CC(O)=C(O)C=C3OC2=C1OC(C)=O RCCVHCHMVALAKN-UHFFFAOYSA-N 0.000 claims 1
- 239000012769 display material Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 3
- -1 biphenyl compound Chemical class 0.000 description 5
- 230000003287 optical effect Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 230000005684 electric field Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 238000002834 transmittance Methods 0.000 description 3
- 238000005303 weighing Methods 0.000 description 3
- YJTKZCDBKVTVBY-UHFFFAOYSA-N 1,3-Diphenylbenzene Chemical group C1=CC=CC=C1C1=CC=CC(C=2C=CC=CC=2)=C1 YJTKZCDBKVTVBY-UHFFFAOYSA-N 0.000 description 2
- 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
- 238000005452 bending Methods 0.000 description 2
- 235000010290 biphenyl Nutrition 0.000 description 2
- 239000004305 biphenyl Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 125000000596 cyclohexenyl group Chemical group C1(=CCCCC1)* 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
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N phenylbenzene Natural products C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- WVIIMZNLDWSIRH-UHFFFAOYSA-N cyclohexylcyclohexane Chemical compound C1CCCCC1C1CCCCC1 WVIIMZNLDWSIRH-UHFFFAOYSA-N 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000011978 dissolution method Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- RGOVYLWUIBMPGK-UHFFFAOYSA-N nonivamide Chemical compound CCCCCCCCC(=O)NCC1=CC=C(O)C(OC)=C1 RGOVYLWUIBMPGK-UHFFFAOYSA-N 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000002390 rotary evaporation Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
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- C—CHEMISTRY; METALLURGY
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- 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
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- 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
- C09K19/06—Non-steroidal liquid crystal compounds
- C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
- C09K19/10—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings
- C09K19/12—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings at least two benzene rings directly linked, e.g. biphenyls
- C09K19/126—Compounds containing at least one asymmetric carbon atom
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- 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
- C09K19/06—Non-steroidal liquid crystal compounds
- C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
- C09K19/30—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing saturated or unsaturated non-aromatic rings, e.g. cyclohexane rings
- C09K19/3001—Cyclohexane rings
- C09K19/3003—Compounds containing at least two rings in which the different rings are directly linked (covalent bond)
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- 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
- C09K19/06—Non-steroidal liquid crystal compounds
- C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
- C09K19/30—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing saturated or unsaturated non-aromatic rings, e.g. cyclohexane rings
- C09K19/3098—Unsaturated non-aromatic rings, e.g. cyclohexene rings
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- 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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- 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
- C09K19/06—Non-steroidal liquid crystal compounds
- C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
- C09K19/10—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings
- C09K19/12—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings at least two benzene rings directly linked, e.g. biphenyls
- C09K2019/121—Compounds containing phenylene-1,4-diyl (-Ph-)
- C09K2019/123—Ph-Ph-Ph
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- 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
- C09K19/06—Non-steroidal liquid crystal compounds
- C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
- C09K19/30—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing saturated or unsaturated non-aromatic rings, e.g. cyclohexane rings
- C09K19/3001—Cyclohexane rings
- C09K19/3003—Compounds containing at least two rings in which the different rings are directly linked (covalent bond)
- C09K2019/3004—Cy-Cy
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- 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
- C09K19/06—Non-steroidal liquid crystal compounds
- C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
- C09K19/30—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing saturated or unsaturated non-aromatic rings, e.g. cyclohexane rings
- C09K19/3001—Cyclohexane rings
- C09K19/3003—Compounds containing at least two rings in which the different rings are directly linked (covalent bond)
- C09K2019/301—Cy-Cy-Ph
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Abstract
The invention discloses a fast response negative liquid crystal composition and application thereof. The negative liquid crystal composition comprises at least one of compounds shown in a formula I, at least one of compounds shown in a formula II, at least one of compounds shown in a formula III and at least one of compounds shown in a formula IV, and further comprises one or more of compounds shown in a formula V, one or more of compounds shown in a formula VI and/or one or more of compounds shown in a formula VII. The liquid crystal composition has low rotational viscosity, large elastic constant, good low-temperature intersolubility and high response speed, can be used for fast response liquid crystal display of various display modes, can obviously improve the display effect of a liquid crystal display when being used in a VA mode display, an IPS mode display or an FFS mode display, and is particularly suitable for IPS mode and FFS mode liquid crystal displays.
Description
Technical Field
The invention relates to a fast response negative liquid crystal composition and application thereof, belonging to the technical field of 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. However, the response time is a major factor affecting high performance displays due to the limitations (high viscosity) of the liquid crystal material itself.
Negative liquid crystals, which have been proposed in the last 80 years, are mainly used in VA mode, and have the major advantages of high contrast and the major disadvantages of small viewing angle and slow response time. With the development of display technology, MVA, PVA, PSVA, and the like technologies have appeared in succession, solving the problems of response time and viewing angle. In recent years, as touch panels become mainstream in the market of mobile devices, IPS and FFS type hard-screen displays have inherent advantages, and both IPS and FFS type displays can use positive liquid crystals and negative liquid crystals, and the positive liquid crystals are aligned along the direction of electric field lines due to the bending electric field existing in the displays, thereby causing bending of molecules and lowering of transmittance; the negative liquid crystal is arranged perpendicular to the direction of the electric field lines, so that the transmittance is greatly improved, and the method is the best method for improving the transmittance and reducing the backlight power consumption at present. However, the response time problem of negative liquid crystals is a significant problem that is currently encountered, and FFS displays using negative liquid crystals have a response time that is 50% or more slower than FFS displays using positive liquid crystals. Therefore, how to increase the response time of the negative liquid crystal is a key issue at present.
Specifically, the response time of the liquid crystal is limited by the rotational viscosity γ 1 and the elastic constant of the liquid crystal, and reducing the rotational viscosity and increasing the elastic constant of the liquid crystal composition have significant effects on reducing the response time of the liquid crystal display and increasing the response speed of the liquid crystal display.
Disclosure of Invention
The object of the present invention is to provide a negative liquid crystal composition; because the response time of the liquid crystal display depends on (d ^2 gamma 1)/Keff (d is the thickness of the liquid crystal layer, gamma 1 is the liquid crystal rotational viscosity, and Keff is the effective elastic constant), the purposes of improving the response time can be achieved by reducing the rotational viscosity, reducing the thickness of the liquid crystal layer and improving the elastic constant, and the thickness of the liquid crystal layer depends on the design of the liquid crystal display; the negative liquid crystal composition provided by the invention has low rotational viscosity, and can effectively reduce the response time of a liquid crystal display.
The invention provides a negative liquid crystal composition, which comprises at least one of compounds shown in a formula I, at least one of compounds shown in a formula II, at least one of compounds shown in a formula III and at least one of compounds shown in a formula IV in percentage by mass:
1-50% of a compound represented by formula I; 1-30% of a compound represented by formula II; 1-35% of a compound represented by formula III; 1-30% of a compound represented by formula IV;
in the formula, R1、R2Each independently represents an alkyl group having 1 to 7 carbon atoms, an alkoxy group having 1 to 7 carbon atoms or an alkenyl group having 2 to 7 carbon atoms; r3、R4Each independently represents an alkyl group having 1 to 7 carbon atoms or an alkoxy group having 1 to 7 carbon atoms; r5Represents an alkyl group having 1 to 7 carbon atoms, an alkoxy group having 1 to 7 carbon atoms or an alkenyl group having 2 to 7 carbon atoms, R6Represents an alkyl group having 1 to 7 carbon atoms or an alkoxy group having 1 to 7 carbon atoms; r7、R8Each independently represents an alkyl group having 1 to 7 carbon atoms or an alkoxy group having 1 to 7 carbon atoms.
The negative liquid crystal composition comprises any one of the following components 1) to 3) in percentage by mass:
1) 10-45% of a compound shown as a formula I; 2-28% of a compound represented by formula II; 2-28% of a compound represented by formula III; 2-28% of a compound represented by formula IV;
2) 15-45% of a compound represented by formula I; 5-25% of a compound represented by formula II; 5-25% of a compound represented by formula III; 5-25% of a compound shown as a formula IV;
3) 25-45% of a compound represented by formula I; 10-25% of a compound represented by formula II; 5-20% of a compound represented by formula III; 5-20% of a compound shown as a formula IV.
The compound shown in the formula I contains bicyclohexane, has good low-temperature solubility, and is preferably selected from one or more of compounds shown in formulas IA1-IA12 and compounds shown in formulas IB1-IB 14;
the compound shown as the formula II is a biphenyl compound containing an olefinic bond, has a relatively high response speed, and is preferably selected from one or more compounds shown as the formula II A1-II A28 and the formula II B1-II B24;
the compound shown in the formula III is a compound containing a tricyclic and has a high clearing point, and preferably, the compound shown in the formula III is selected from one or more compounds shown in formulas IIIA 1-IIIA 24 and IIIB 1-IIIB 24:
the compound shown in the formula IV is a negative dielectric anisotropy compound containing a cyclohexene structure, has a large elastic constant, and is preferably selected from one or more of compounds shown in formulas IV A1-IV A24 and compounds shown in formulas IV B1-IV B24:
the negative liquid crystal composition also comprises one or more compounds shown as a formula V, one or more compounds shown as a formula VI and/or one or more compounds shown as a formula VII;
in formula V, R9、R10Each independently represents an alkyl group or an alkoxy group having 1 to 7 carbon atoms; r11、R12Each independently represents an alkyl group having 1 to 7 carbon atoms, an alkoxy group having 1 to 7 carbon atoms or an alkenyl group having 2 to 7 carbon atoms; r13、R14Each independently represents an alkyl group having 1 to 7 carbon atoms or an alkoxy group having 1 to 7 carbon atoms;
the compound shown in the formula V is a negative terphenyl compound, has large dielectric anisotropy, is added into a liquid crystal composition to be matched with the compound shown in the formula I-formula IV, further improves the dielectric anisotropy and the optical anisotropy of the liquid crystal composition, reduces the rotational viscosity of the liquid crystal composition, reduces the driving voltage of a liquid crystal display and improves the response time of the liquid crystal display; the mass percentage of the compound shown in the formula V is 0-30% but not zero, preferably 2-28%, 5-25% or 5-20%, and at the moment, the response time of the liquid crystal display is favorably improved.
The compound shown in the formula VI is a terphenyl compound and has a large refractive index, and the compound is added into the liquid crystal composition to be matched with the compound shown in the formula I-formula V, so that the optical anisotropy of the liquid crystal composition is further improved, the rotational viscosity of the liquid crystal composition is reduced, the driving voltage of a liquid crystal display is reduced, and the response time of the liquid crystal display is improved; the mass percentage of the compound shown in the formula VI is 0-30% but not zero, preferably 2-28%, 5-25% or 5-20%, and at the moment, the response time of the liquid crystal display is favorably improved.
The compound shown in the formula VII is a tetrabiphenyl compound, has the function of improving the high-temperature reliability, and is added into the liquid crystal composition to be beneficial to matching with the compound shown in the formula I-formula VI, so that the high-temperature reliability of the liquid crystal composition is further improved; the mass percentage of the compound shown in the formula VII is 0-10% but not zero, preferably 0-5%, 0-3% or 0-1%, and at the moment, the response time of the liquid crystal display is further improved.
Preferably, the compound shown in the formula V is selected from one or more compounds shown in formulas V A1-V A8 and V B1-V B16:
preferably, the compound shown in the formula VI is selected from one or more compounds shown in the formula VI A1-VI A16 and the formula VI B1-VI B8:
preferably, the compound shown in the formula VII is selected from one or more compounds shown in the formula VII-1-formula VII-8:
in order to ensure that more remarkable synergistic effect is realized among the components in the composition disclosed by the invention so as to effectively improve the comprehensive application performance of the liquid crystal material, the dosage of each component in the liquid crystal material is further optimized.
The negative liquid crystal composition comprises the following components in percentage by mass:
1-50% of a compound shown in formula I; 1-30% of a compound shown in a formula II; 1-30% of a compound shown as a formula III; 1-30% of a compound shown in a formula IV; 0-30% of a compound represented by formula V; 0-30% of a compound shown as a formula VI; 0-5% of the compound shown in the formula VII.
The negative liquid crystal composition of the present invention preferably has any of the following compositions 1) to 10) by mass percent:
1) 15-40% of a compound shown in formula I; 5-25% of a compound shown in a formula II; 5-25% of a compound shown as a formula III; 5-25% of a compound shown as a formula IV;
2) 25-40% of a compound shown in formula I; 10-25% of a compound shown as a formula II; 5-20% of a compound shown as a formula III; 5-20% of a compound shown as a formula IV;
3) 15-40% of a compound shown in formula I; 5-25% of a compound shown in a formula II; 5-25% of a compound shown as a formula III; 5-25% of a compound shown as a formula IV; 5-25% of a compound shown as a formula V;
4) 25-40% of a compound shown in formula I; 10-25% of a compound shown as a formula II; 5-20% of a compound shown as a formula III; 5-20% of a compound shown in a formula IV; 5-20% of a compound shown as a formula V;
5) 15-40% of a compound shown in formula I; 5-25% of a compound shown in a formula II; 5-25% of a compound shown as a formula III; 5-25% of a compound shown as a formula IV; 5-25% of a compound shown as a formula V; 0-3% of a compound shown in a formula VII;
6) 25-40% of a compound shown in formula I; 10-25% of a compound shown as a formula II; 5-20% of a compound shown as a formula III; 5-20% of a compound shown as a formula IV; 5-20% of a compound shown as a formula V; 0-1% of a compound shown as a formula VII;
7) 15-40% of a compound shown in formula I; 5-25% of a compound shown in a formula II; 5-25% of a compound shown as a formula III; 5-25% of a compound shown as a formula IV; 5-25% of a compound shown as a formula V; 5-25% of a compound shown as a formula VI;
8) 25-40% of a compound shown in formula I; 10-25% of a compound shown as a formula II; 5-20% of a compound shown as a formula III; 5-20% of a compound shown as a formula IV; 5-20% of a compound shown as a formula V; 5-20% of a compound shown as a formula VI;
9) 15-40% of a compound shown in formula I; 5-25% of a compound shown in a formula II; 5-25% of a compound shown as a formula III; 5-25% of a compound shown in a formula IV; 5-25% of a compound shown as a formula V; 5-25% of a compound shown as a formula VI; 0-3% of a compound shown as a formula VII;
10) 25-40% of a compound shown in formula I; 10-25% of a compound shown as a formula II; 5-20% of a compound shown as a formula III; 5-20% of a compound shown as a formula IV; 5-20% of a compound shown as a formula V; 5-20% of a compound shown as a formula VI; 0-1% of the compound shown in the formula VII.
The compound shown in the formula I in the liquid crystal composition 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 compound shown in the formula II is a biphenyl compound containing an olefinic bond, and the compound has low rotational viscosity and can effectively improve the response speed; the compound shown in the formula III is a tricyclic compound, and the compound has a higher clearing point and can effectively improve the clearing point of the liquid crystal composition; the compound shown in the formula IV is a negative dielectric anisotropy compound containing a cyclohexene structure, has a large elastic constant, and is very effective in improving the elastic constant of the liquid crystal composition; the compound shown in the formula V is a negative dielectric anisotropy compound containing terphenyl, has large dielectric anisotropy and is very helpful for improving the dielectric anisotropy of the liquid crystal composition; the compound shown in the formula VI is a compound containing terphenyl, has a large refractive index, and is very effective in improving the optical anisotropy of the liquid crystal composition; the compound represented by the formula VII is a tetrabiphenyl compound, which is very effective for improving the high-temperature reliability 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 in a solvent for the compounds and mixed, 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 has low rotational viscosity, large elastic constant, good low-temperature intersolubility and high response speed, can be used for fast response liquid crystal display of various display modes, can obviously improve the display effect of a liquid crystal display when being used in a VA mode display, an IPS mode display or an FFS mode display, and is particularly suitable for IPS mode and FFS mode liquid crystal displays.
Detailed Description
The experimental procedures used in the following examples are all conventional procedures unless otherwise specified.
Materials, reagents and the like used in the following examples are commercially available unless otherwise specified.
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 the splay, twist and bend 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 structural code of liquid crystal compounds
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 of the liquid crystal compositions and the performance parameters of the liquid crystal compositions are shown in the following tables.
Examples 1,
TABLE 2 weight percentages and performance parameters of the components in the liquid crystal compositions
Examples 2,
TABLE 3 weight percents of the components and the performance parameters of the liquid crystal compositions
Examples 3,
TABLE 4 weight percents of the components and the performance parameters of the liquid crystal compositions
Examples 4,
TABLE 5 weight percents of the components and Performance parameters of the liquid Crystal compositions
Examples 5,
TABLE 6 weight percents of the components and the performance parameters of the liquid crystal compositions
Examples 6,
TABLE 7 weight percents of the components and the performance parameters of the liquid crystal compositions
Example 7,
TABLE 8 weight percents of the components and Performance parameters of the liquid Crystal compositions
Example 8,
TABLE 9 weight percents of the components and Performance parameters of the liquid Crystal compositions
Examples 9,
TABLE 10 weight percents of the components and the performance parameters of the liquid crystal compositions
Examples 10,
TABLE 11 weight percents of the components and Performance parameters of the liquid Crystal compositions
Examples 11,
TABLE 12 weight percents of the components and Performance parameters of the liquid Crystal compositions
Examples 12,
TABLE 13 weight percents of the components and Performance parameters of the liquid Crystal compositions
Examples 13,
TABLE 14 weight percents of the components and Performance parameters of the liquid Crystal compositions
Examples 14,
TABLE 15 weight percents of the components and the performance parameters of the liquid crystal compositions
Examples 15,
TABLE 16 weight percents of the components and the performance parameters of the liquid crystal compositions
Examples 16,
TABLE 17 weight percents of the components of the liquid crystal composition and the performance parameters
Examples 17,
TABLE 18 weight percents of the components and Performance parameters of the liquid Crystal compositions
Examples 18,
TABLE 19 weight percents of the components and Performance parameters of the liquid Crystal compositions
Examples 19,
TABLE 20 weight percents of the components and Performance parameters of the liquid Crystal compositions
Examples 20,
TABLE 21 weight percents of the components and Performance parameters of the liquid Crystal compositions
Examples 21,
TABLE 22 weight percents of the components and the performance parameters of the liquid crystal compositions
Examples 22,
TABLE 23 weight percents of the components and Performance parameters of the liquid Crystal compositions
Examples 23,
TABLE 24 weight percents of the components and Performance parameters of the liquid Crystal compositions
Examples 24,
TABLE 25 weight percents of the components and Performance parameters of the liquid Crystal compositions
Examples 25,
TABLE 26 weight percents of the components and Performance parameters of the liquid Crystal compositions
Examples 26,
TABLE 27 weight percents of the components and Performance parameters of the liquid Crystal compositions
Examples 27,
TABLE 28 weight percents of the components and Performance parameters of the liquid Crystal compositions
Examples 28,
TABLE 29 weight percents of the components and Performance parameters of the liquid Crystal compositions
Comparative examples 1,
TABLE 30 weight percents of the components and Performance parameters of the liquid Crystal compositions
Examples 1, 3, 28 have lower rotational viscosity and thus faster response time than comparative example 1.
From the above embodiments, the liquid crystal composition provided by the present invention has low rotational viscosity, high resistivity, suitable optical anisotropy, good low-temperature intersolubility, large elastic constant, and excellent light stability and thermal stability, and can reduce the response time of the liquid crystal display, thereby solving the problem of slow response speed of the liquid crystal display. Therefore, the liquid crystal composition provided by the invention is suitable for VA, IPS and FFS type TFT liquid crystal display devices with fast response, and is particularly suitable for IPS and FFS liquid crystal display devices.
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.
Claims (10)
1. A negative liquid crystal composition comprises at least one of compounds shown as a formula I, at least one of compounds shown as a formula II, at least one of compounds shown as a formula III and at least one of compounds shown as a formula IV in percentage by mass:
1-50% of a compound represented by formula I; 1-30% of a compound represented by formula II; 1-35% of a compound represented by formula III; 1-30% of a compound represented by formula IV;
in the formula, R1、R2Each independently represents an alkyl group having 1 to 7 carbon atoms, an alkoxy group having 1 to 7 carbon atoms or an alkenyl group having 2 to 7 carbon atoms; r3、R4Each independently represents an alkyl group having 1 to 7 carbon atoms or an alkoxy group having 1 to 7 carbon atoms; r5Represents an alkyl group having 1 to 7 carbon atoms, an alkoxy group having 1 to 7 carbon atoms or an alkenyl group having 2 to 7 carbon atoms, R6Represents an alkyl group having 1 to 7 carbon atoms or an alkoxy group having 1 to 7 carbon atoms; r7、R8Each independently represents an alkyl group having 1 to 7 carbon atoms or an alkoxy group having 1 to 7 carbon atoms.
2. The negative liquid crystal composition according to claim 1, wherein: the negative liquid crystal composition comprises any one of the following components 1) to 3) in percentage by mass:
1) 10-45% of a compound shown as a formula I; 2-28% of a compound represented by formula II; 2-28% of a compound represented by formula III; 2-28% of a compound represented by formula IV;
2) 15-45% of a compound represented by formula I; 5-25% of a compound represented by formula II; 5-25% of a compound represented by formula III; 5-25% of a compound shown as a formula IV;
3) 25-45% of a compound represented by formula I; 10-25% of a compound represented by formula II; 5-20% of a compound represented by formula III; 5-20% of a compound shown as a formula IV.
3. The negative liquid crystal composition according to claim 1 or 2, wherein: the compound shown in the formula I is selected from one or more of compounds shown in formulas IA1-IA12 and IB1-IB 14;
4. the negative liquid crystal composition according to any one of claims 1 to 3, wherein: the compound shown in the formula II is selected from one or more compounds shown in formulas II A1-II A28 and II B1-II B24;
5. the negative liquid crystal composition according to any one of claims 1 to 4, wherein: the compound shown in the formula III is selected from one or more compounds shown in formulas III A1-III A24 and III B1-III B24:
6. the negative liquid crystal composition according to any one of claims 1 to 5, wherein: the compound shown in the formula IV is selected from one or more compounds shown in formulas IV A1-IV A24 and IV B1-IV B24:
7. the negative liquid crystal composition according to any one of claims 1 to 6, wherein: the negative liquid crystal composition also comprises one or more compounds shown in a formula V, one or more compounds shown in a formula VI and/or one or more compounds shown in a formula VII;
in formula V, R9、R10Each independently represents an alkyl group or an alkoxy group having 1 to 7 carbon atoms; r11、R12Each independently represents an alkyl group having 1 to 7 carbon atoms, an alkoxy group having 1 to 7 carbon atoms or an alkenyl group having 2 to 7 carbon atoms; r13、R14Each independently represents an alkyl group having 1 to 7 carbon atoms or an alkoxy group having 1 to 7 carbon atoms;
in the negative liquid crystal composition, the mass percentage of the compound shown as the formula V is 0-30% but not zero, and preferably 2-28%, 5-25% or 5-20%;
in the negative liquid crystal composition, the mass percentage of the compound shown in the formula VI is 0-30% but not zero, and preferably 2-28%, 5-25% or 5-20%;
in the negative liquid crystal composition, the mass percentage of the compound shown in the formula VII is 0-10% but not zero, and preferably 0-5%, 0-3% or 0-1%.
8. The negative liquid crystal composition according to claim 7, wherein: the compound shown in the formula V is one or more of compounds shown in formulas V A1-V A8 and V B1-V B16:
the compound shown in the formula VI is selected from one or more compounds shown in formulas VI A1-VI A16 and VI B1-VI B8:
the compound shown in the formula VII is selected from one or more compounds shown in a formula VII-1-formula VII-8:
9. the negative liquid crystal composition according to any one of claims 1 to 8, wherein: the negative liquid crystal composition comprises the following components in percentage by mass:
1-50% of a compound represented by formula I; 1-30% of a compound shown in a formula II; 1-30% of a compound shown as a formula III; 1-30% of a compound shown in a formula IV; 0-30% of a compound represented by formula V; 0-30% of a compound shown as a formula VI; 0-5% of the compound shown in the formula VII.
10. Use of the negative liquid crystal composition of any one of claims 1 to 9 for the preparation of a liquid crystal display material or a liquid crystal display device.
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