CN113637487B - Quick-response negative liquid crystal composition and application thereof - Google Patents
Quick-response negative liquid crystal composition and application thereof Download PDFInfo
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- CN113637487B CN113637487B CN202110915708.XA CN202110915708A CN113637487B CN 113637487 B CN113637487 B CN 113637487B CN 202110915708 A CN202110915708 A CN 202110915708A CN 113637487 B CN113637487 B CN 113637487B
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 96
- 239000000203 mixture Substances 0.000 title claims abstract description 59
- 150000001875 compounds Chemical class 0.000 claims abstract description 123
- RGOVYLWUIBMPGK-UHFFFAOYSA-N nonivamide Chemical compound CCCCCCCCC(=O)NCC1=CC=C(O)C(OC)=C1 RGOVYLWUIBMPGK-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 16
- DQXKOHDUMJLXKH-PHEQNACWSA-N (e)-n-[2-[2-[[(e)-oct-2-enoyl]amino]ethyldisulfanyl]ethyl]oct-2-enamide Chemical compound CCCCC\C=C\C(=O)NCCSSCCNC(=O)\C=C\CCCCC DQXKOHDUMJLXKH-PHEQNACWSA-N 0.000 claims 1
- 239000000178 monomer Substances 0.000 abstract description 14
- 239000000463 material Substances 0.000 abstract description 13
- 239000002131 composite material Substances 0.000 description 7
- 238000011056 performance test Methods 0.000 description 7
- 230000000704 physical effect Effects 0.000 description 7
- 125000000217 alkyl group Chemical group 0.000 description 6
- 125000004432 carbon atom Chemical group C* 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 4
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 4
- 238000003756 stirring Methods 0.000 description 3
- 125000003342 alkenyl group Chemical group 0.000 description 2
- 125000003545 alkoxy group Chemical group 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- CFOAUMXQOCBWNJ-UHFFFAOYSA-N [B].[Si] Chemical compound [B].[Si] CFOAUMXQOCBWNJ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000005388 borosilicate glass Substances 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010907 mechanical stirring Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000000967 suction filtration Methods 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 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 1
- 238000002834 transmittance Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000005303 weighing 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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- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Liquid Crystal Substances (AREA)
Abstract
The invention relates to a quick-response negative liquid crystal composition and application thereof, and belongs to the technical field of liquid crystal materials. The negative liquid crystal composition comprises a monomer compound with a structure shown in a general formula I, wherein the mass fraction of the monomer compound is 20% -40%; the mass fraction of the monomer compound with the structure shown in the general formula II is 30% -38%; the mass fraction of the monomer compound with the structure shown in the general formula III is 25% -40%; the mass fraction of the monomer compound with the structure shown in the general formula IV is 0-18%. The invention solves the problem of slow response time of VA by increasing the k value of the liquid crystal material, reducing the rotational viscosity and increasing the birefringence to reduce the cell thickness, greatly improves the quality of display devices, and can also be used in the fields of PSVA and UV 2A. Meanwhile, the driving voltage of the liquid crystal is reduced by properly increasing the dielectric constant of the liquid crystal, so that the power consumption is reduced.
Description
Technical Field
The invention relates to a quick-response negative liquid crystal composition and application thereof, wherein the liquid crystal composition can be applied to the liquid crystal display industry, particularly to a liquid crystal display device, and can improve the tailing phenomenon of a display picture, particularly a dynamic picture, so as to improve the picture quality, properly increase the dielectric constant of liquid crystal and reduce the driving voltage of the liquid crystal, and belongs to the technical field of liquid crystal materials.
Background
With the rapid development of liquid crystal materials and liquid crystal display technology, liquid crystal display applications are becoming more and more widespread, and liquid crystal products such as mobile phones, tablets, automobile panels, televisions, computer monitors and the like are becoming visible everywhere in daily life. The main liquid crystal display mode has TN, VA, IPS, FFS and the like, and the display has the characteristics of high transmittance of TN mode, but poor viewing angle and low contrast. IPS and FFS have high contrast and wide viewing angle. VA mode contrast is highest but is a traditional "soft screen".
As display requirements increase, high quality display requirements become critical. VA negative liquid crystals have a relatively excellent high contrast. In the prior art, some negative liquid crystals of modes of MVA, PVA and the like gradually appear, and the negative liquid crystals solve the problem of visual angles by utilizing multiple domains.
For the above related art, there are the following drawbacks: the response time of the negative liquid crystal in the modes of MVA, PVA and the like is slow, the response speed of the pixel points to the input signals cannot be kept up, similar residual shadows or trailing marks can appear when a picture moving at a high speed is watched, the smoothness of the picture cannot be ensured, and meanwhile, the driving voltage is higher because the dielectric constant of the negative liquid crystal is relatively smaller.
Disclosure of Invention
The invention mainly aims to solve the problems of high rotational viscosity, slow response speed, low dielectric constant and high driving voltage of the negative liquid crystal material.
In order to improve the above problems, the present invention provides a fast-responding negative liquid crystal composition. The liquid crystal composition has the advantages that the response time is greatly improved by improving the problems of high rotational viscosity, low response time and the like of the negative liquid crystal, and the driving voltage of the liquid crystal is reduced by properly improving the dielectric constant of the liquid crystal. The invention improves the rotation viscosity of the negative liquid crystal material, increases the response speed, increases the dielectric constant and reduces the driving voltage. The composition can be applied to the fields of PSVA, UV2A and the like, and is significant to the field of high display.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the fast-response negative liquid crystal composition material comprises the following components in percentage by mass:
At least comprises one or more monomer compounds with a structure shown in a general formula I, wherein the mass fraction of the monomer compounds is 20% -40%, and the specific structure of the general formula I is as follows:
In the general formula, R 1,R2 respectively and independently represents straight-chain alkyl or alkenyl with 1-5 carbon atoms; a 1,A2 each independently represents cyclohexane or a benzene ring;
At least comprises one or more monomer compounds with a structure shown in a general formula II, wherein the mass fraction of the monomer compounds is 30% -38%, and the specific structure of the general formula II is as follows:
In the general formula, R 3,R4 respectively and independently represents a straight-chain alkyl group with 2-5 carbon atoms; n represents 1 or 2 cyclohexane;
at least comprises one or more monomer compounds with a structure shown in a general formula III, wherein the mass fraction of the monomer compounds is 25% -40%, and the specific structure of the general formula I is as follows:
In the general formula, R 5 represents a straight-chain alkyl group with 2-5 carbon atoms; r 6 represents a linear alkyl group or alkenyl group having 1 to 4 carbon atoms or an alkoxy group; y 1,Y2,Y3 each independently represents a-F or-H group substitution; a3 and A4 each independently represent cyclohexane or a benzene ring;
at least comprises one or more monomer compounds with a structure shown in a general formula IV, wherein the mass fraction of the monomer compounds is 0-18%, and the specific structure of the general formula IV is as follows:
In the general formula, R 7 represents a straight-chain alkyl group with 2-5 carbon atoms; r 8 represents a linear alkyl group or an alkoxy group having 2 to 6 carbon atoms; a5 represents cyclohexane or a benzene ring; m represents 0 or 1 benzene ring;
the mass sum of the monomer compounds of the structures shown in the general formula I, the general formula II, the general formula III and the general formula IV is 100 percent.
Preferably, in the liquid crystal composition material, the compound shown in the general formula I is selected from one or more of the following compounds shown in the general formulas I-1 to I-15:
Further preferably, the compound of formula I is selected from one or more of the liquid crystal compounds of formulas I-3, I-5, I-6, I-7, I-8, I-9, I-11, I-12, I-13, I-14 and I-15.
Further preferably, the compound of formula I is selected from a plurality of compounds of formulae I-3, I-5, I-7, I-9, I-11, I-12, I-13, I-14 and I-15.
Preferably, in the liquid crystal composition material, the compound shown in the general formula II is selected from one or more of the compounds shown in the following general formulas II-1 to II-18:
Further preferably, the compound represented by the formula II is selected from one or more of liquid crystal compounds represented by the formulas II-1, II-2, II-5, II-6 and II-7.
Preferably, the compound of formula II is selected from a plurality of compounds of formulas II-2, II-5 and II-6.
Preferably, in the liquid crystal composition material, the compound shown in the general formula III is selected from one or more of compounds shown in the following general formulas III-1 to III-34:
it is further preferred that the compound of formula III is selected from one or more of the liquid crystal compounds of formulae III-5, III-6, III-9, III-10, III-13, III-20, III-24, III-29, III-33 and III-34.
In a further preferred embodiment, the compound of formula III is selected from one or more of the liquid crystal compounds of formulae III-5, III-10, III-13, III-20, III-24, III-29, III-30, III-31, III-32 and III-34.
Preferably, in the liquid crystal composition material, the compound shown in the general formula IV is selected from one or more of the compounds shown in the following general formulas IV-1 to IV-19:
further preferably, the compound of formula IV is selected from one or more of the liquid crystal compounds of formulas IV-6, IV-8, IV-16 and IV-17.
Preferably, the compound of formula IV is selected from one or two of the compounds of formulas IV-6, IV-8 and IV-17.
In the rapid-response negative liquid crystal composition material, the compound shown in the general formula I accounts for 22-40% by weight, and more preferably 23-38% by weight; the compound shown in the general formula II is 32% -38%, more preferably 33% -37%; the compound shown in the general formula III is 27% -40%, more preferably 28% -39%; the compound represented by the general formula IV is 0% to 16% or 0.1% to 16%, more preferably 0% to 15% or 0.5% to 15%.
The fast-response negative liquid crystal composition material can be applied to liquid crystal display devices in negative display modes, wherein the negative display modes comprise VA, PSVA, UV, A, IPS, FFS and other display modes.
The liquid crystal composition has larger k value and smaller rotational viscosity, greatly improves the response speed, solves the problems that the negative liquid crystal material has higher rotational viscosity, slow response time and the like, and the problem that the negative liquid crystal material has slow response time is always plagued by the negative liquid crystal.
The invention has the advantages that:
The negative liquid crystal material molecules have larger rotational viscosity due to the molecular structure, and have the problems of slow response time in the use process, and the slow response time can lead to tailing of display pictures, particularly dynamic pictures, and affect the continuity and the ornamental value of the picture quality. The invention solves the problem of slow response time of VA by increasing the k value of the liquid crystal material, reducing the rotational viscosity and increasing the birefringence to reduce the cell thickness, greatly improves the quality of the display device, and simultaneously reduces the driving voltage of the liquid crystal by properly increasing the dielectric constant of the liquid crystal, thereby being beneficial to reducing the power consumption.
The invention solves the problems of higher rotational viscosity, slow response time and the like of the negative liquid crystal material, and the problem that VA is always plagued by the slow response time, solves the problem of slow response time of VA, greatly improves the quality of a display device used by VA, and can be used in the fields of PSVA and UV 2A.
Detailed Description
The liquid crystal composition of the invention is prepared according to the following method, and the production process is as follows: weighing the compounds according to the formula proportion, mixing the compounds with each other, placing the mixture into a hard high borosilicate glass bottle, vacuumizing the bottle, supplementing nitrogen, repeating the operation for three times, heating the mixture under the protection of the nitrogen, stirring the mixture by electromagnetic or mechanical stirring until the mixture is molten, clear and uniform and transparent solution, continuing stirring for 30 minutes, and stopping heating after thoroughly and uniformly mixing the materials. Then stirred at room temperature for 1 hour. Filtering the mixed liquid crystal with a sand core funnel into a clean and dry hard high boron silicon suction filtration bottle, then decompressing and degassing under stirring until no bubbles appear, and finally bottling and packaging.
The shorthand numbers of test items in the following embodiments of the present invention are as follows:
Tni: clearing away the bright spots;
no: refractive index of ordinary ray (589 nm,25 ℃ C.);
and (2) ne: refractive index of extraordinary ray (589 nm,25 ℃);
An: refractive index anisotropy (589 nm,25 ℃);
ton+off represents the response time measured in a 4um vertical cell at 25 ℃;
Δε: dielectric anisotropy (1 KHz,25 ℃);
Wherein, Δε=ε - ε ⊥, where ε is the dielectric constant parallel to the molecular axis and ε+.T is the dielectric constant perpendicular to the molecular axis, test conditions: 25 ℃ and 1KHz;
k11: a splay elastic constant;
k33: a flexural spring constant;
γ1: represents the rotational viscosity [ mPas ] measured at 25℃and 20 μm box thickness, as measured by Instec.
Example 1:
According to the compositions of the liquid crystal compositions in Table 1, liquid crystal compositions were prepared by referring to the method of the present invention, and were filled into test boxes for performance test, and the results of the measured physical properties are shown in Table 1.
Table 1 composition and test data for example 1 liquid crystal composition
In example 1, the liquid crystal display device has a large dielectric constant, slightly large birefringence, particularly low rotational viscosity and relatively large K value, which is significant for the display device of VA, PSVA, UV a or other negative liquid crystals, and greatly improves the quality of the liquid crystal display.
Example 2:
According to the compositions of the liquid crystal compositions in Table 2, liquid crystal compositions were prepared by referring to the method of the present invention, and were filled into test boxes for performance test, and the results of the measured physical properties are shown in Table 2.
TABLE 2 composition and test data for example 2 liquid crystal composition
In example 2, it was found that the liquid crystal material has a low clearing point and a moderate refractive index and dielectric constant, and in particular, a low rotational viscosity can greatly improve the rapid speed of the display device.
Example 3:
According to the compositions of the liquid crystal compositions shown in Table 3, liquid crystal compositions were prepared by referring to the method of the present invention, and were filled into test boxes for performance test, and the results of the measured physical properties are shown in Table 3.
TABLE 3 composition and test data for example 3 liquid crystal composition
Example 4:
According to the compositions of the liquid crystal compositions shown in Table 4, liquid crystal compositions were prepared by referring to the method of the present invention, and were filled into test boxes for performance test, and the results of the measured physical properties are shown in Table 4.
TABLE 4 composition and test data for example 4 liquid crystal composition
Example 5:
according to the compositions of the liquid crystal compositions shown in Table 5, liquid crystal compositions were prepared by referring to the method of the present invention, and were filled into test boxes for performance test, and the results of the measured physical properties are shown in Table 5.
TABLE 5 composition of example 5 liquid crystal composition and test data
Example 6:
According to the compositions of the liquid crystal compositions shown in Table 6, liquid crystal compositions were prepared by referring to the method of the present invention, and were filled into test boxes for performance test, and the results of the measured physical properties are shown in Table 6.
TABLE 6 composition and test data for example 6 liquid crystal composition
Example 7:
According to the compositions of the liquid crystal compositions shown in Table 7, liquid crystal compositions were prepared by referring to the method of the present invention, and were filled into test boxes for performance test, and the results of the measured physical properties are shown in Table 7.
TABLE 7 composition and test data for example 7 liquid crystal composition
The liquid crystal composition has larger k value and lower rotational viscosity, and can improve response speed by matching with the thickness of a liquid crystal box, thereby improving display image quality. The dielectric constant of the liquid crystal is appropriately increased to reduce the driving voltage of the liquid crystal, thereby contributing to reduction of power consumption.
Claims (9)
1. A fast response negative liquid crystal composition characterized by: the method comprises the following steps of:
8.5% of Compound I-3:
6% of compound I-5:
10% of compound I-9:
5% of compound I-7:
14% of compound II-2:
16% of compound II-6:
6% of compound II-5:
7% of compound III-20:
5% of compound III-21:
7% of compound III-31:
8.5% of Compound III-32:
7% of compound III-24:
2. a fast response negative liquid crystal composition characterized by: the method comprises the following steps of:
8.5% of Compound I-13:
8% of Compound I-14:
13% of Compound I-9:
14% of compound II-2:
16% of compound II-6:
6% of compound II-5:
7% of compound III-20:
5% of compound III-10:
6% of compound III-30:
8.5% of Compound III-31:
6% of compound III-24:
2% of compound IV-6:
3. a fast response negative liquid crystal composition characterized by: the method comprises the following steps of:
17.5% of Compound I-14:
7% of compound I-7:
10% of compound I-9:
12% of compound II-2:
16% of compound II-6:
6% of compound II-5:
6% of compound III-20:
3% of compound III-10:
5% of compound III-21:
5% of compound III-30:
6.5% of Compound III-31:
6% of compound III-24:
4. a fast response negative liquid crystal composition characterized by: the method comprises the following steps of:
7% of Compound I-13:
17.5% of Compound I-14:
10% of compound I-9:
12% of compound II-2:
16% of compound II-6:
6% of compound II-5:
6% of compound III-20:
3% of compound III-10:
5% of compound III-21:
5% of compound III-30:
6.5% of Compound III-31:
6% of compound III-24:
5. a fast response negative liquid crystal composition characterized by: the method comprises the following steps of:
14% of Compound I-12:
17.5% of Compound I-14:
6% of compound I-15:
12% of compound II-2:
16% of compound II-6:
6% of compound II-5:
6% of compound III-20:
3.5% of Compound III-21:
5% of compound III-30:
8% of compound III-31:
6% of compound III-24:
6. a fast response negative liquid crystal composition characterized by: the method comprises the following steps of:
17.5% of Compound I-14:
6% of compound I-15:
12% of compound II-2:
16% of compound II-6:
6% of compound II-5:
8% of compound III-30:
8% of compound III-31:
6% of compound III-33:
6% of compound III-34:
10% of compound IV-8:
4.5% of Compound IV-17:
7. a fast response negative liquid crystal composition characterized by: the method comprises the following steps of:
17.5% of Compound I-14:
6% of compound I-15:
11% of compound II-2:
16% of compound II-6:
6% of compound II-5:
8% of compound III-31:
8% of compound III-32:
6% of compound III-33:
7% of compound III-34:
10% of compound IV-8:
4.5% of Compound IV-17:
8. use of a fast response negative liquid crystal composition according to any of claims 1-7 for the preparation of a negative display mode liquid crystal display device.
9. The use according to claim 8, characterized in that: the liquid crystal display device comprises VA, PSVA, UV, 2 and A, IPS and an FFS liquid crystal display device.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107109233A (en) * | 2015-01-20 | 2017-08-29 | 捷恩智株式会社 | Liquid-crystal composition and liquid crystal display cells |
| CN107835846A (en) * | 2015-07-01 | 2018-03-23 | Dic株式会社 | Composition and use its liquid crystal display cells |
| CN110268314A (en) * | 2017-02-24 | 2019-09-20 | 捷恩智株式会社 | Liquid crystal display element and liquid-crystal composition |
| CN111019670A (en) * | 2018-10-10 | 2020-04-17 | Dic株式会社 | Liquid crystal composition |
| CN112852443A (en) * | 2019-11-27 | 2021-05-28 | Dic株式会社 | Polymerizable liquid crystal composition and liquid crystal display element using same |
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| JP2007023071A (en) * | 2005-07-12 | 2007-02-01 | Chisso Corp | Liquid crystal composition and liquid crystal display element |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107109233A (en) * | 2015-01-20 | 2017-08-29 | 捷恩智株式会社 | Liquid-crystal composition and liquid crystal display cells |
| CN107835846A (en) * | 2015-07-01 | 2018-03-23 | Dic株式会社 | Composition and use its liquid crystal display cells |
| CN110268314A (en) * | 2017-02-24 | 2019-09-20 | 捷恩智株式会社 | Liquid crystal display element and liquid-crystal composition |
| CN111019670A (en) * | 2018-10-10 | 2020-04-17 | Dic株式会社 | Liquid crystal composition |
| CN112852443A (en) * | 2019-11-27 | 2021-05-28 | Dic株式会社 | Polymerizable liquid crystal composition and liquid crystal display element using same |
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