CN113789184B - Negative large refractive index liquid crystal composition and application thereof - Google Patents
Negative large refractive index liquid crystal composition and application thereof Download PDFInfo
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- CN113789184B CN113789184B CN202111188901.4A CN202111188901A CN113789184B CN 113789184 B CN113789184 B CN 113789184B CN 202111188901 A CN202111188901 A CN 202111188901A CN 113789184 B CN113789184 B CN 113789184B
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 85
- 239000000203 mixture Substances 0.000 title claims abstract description 73
- 150000001875 compounds Chemical class 0.000 claims abstract description 66
- 238000002360 preparation method Methods 0.000 claims description 2
- KOFLVDBWRHFSAB-UHFFFAOYSA-N 1,2,4,5-tetrahydro-1-(phenylmethyl)-5,9b(1',2')-benzeno-9bh-benz(g)indol-3(3ah)-one Chemical compound C1C(C=2C3=CC=CC=2)C2=CC=CC=C2C23C1C(=O)CN2CC1=CC=CC=C1 KOFLVDBWRHFSAB-UHFFFAOYSA-N 0.000 claims 1
- 230000003287 optical effect Effects 0.000 abstract description 6
- 230000035515 penetration Effects 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 3
- 238000011056 performance test Methods 0.000 description 12
- 125000004432 carbon atom Chemical group C* 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 238000012360 testing method Methods 0.000 description 7
- 230000000704 physical effect Effects 0.000 description 6
- 239000012071 phase Substances 0.000 description 5
- 125000003545 alkoxy group Chemical group 0.000 description 4
- 125000000217 alkyl group Chemical group 0.000 description 4
- 238000002834 transmittance Methods 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 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
- 238000007872 degassing Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 125000003342 alkenyl group Chemical group 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 230000007704 transition 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
- G02F1/137—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
- G02F1/13712—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering the liquid crystal having negative dielectric anisotropy
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- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Nonlinear Science (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal Substances (AREA)
Abstract
The invention relates to a negative high refractive index liquid crystal composition and application thereof, and belongs to the technical field of liquid crystal materials. The negative large refractive index liquid crystal composition comprises A, B, C, D components, wherein the weight percentages of the components are as follows: 42-55% of component A, 35-45% of component B, 10-18% of component C and 0-5% of component D. The liquid crystal composition has large negative dielectric anisotropy and large optical anisotropy, has a wide nematic phase temperature range, has excellent performance, and is very suitable for being applied to various negative display modes including VA, IPS, FFS and other display modes. The invention selects four liquid crystal compounds and the proportion thereof to lead the parameters of dielectric constant, liquid crystal birefringence and the like of the liquid crystal composition to reach the required values, thereby leading the liquid crystal display product adopting the liquid crystal composition to have faster response time and higher penetration rate.
Description
Technical Field
The invention relates to a negative large refractive index liquid crystal composition and application thereof, and the liquid crystal composition is suitable for being applied to various negative display modes including VA, IPS, FFS and other display modes, and belongs to the technical field of liquid crystal materials.
Background
Liquid crystal displays, which were first developed as electronic computer and digital clock displays in the 70 s of the 20 th century, are now spread throughout daily life with the development and progress of technology.
The negative liquid crystal was first proposed in the last 80 th century, and was mainly used in VA mode, which has very excellent contrast properties but has significant response time problems. It is a more desirable goal how faster response times can be achieved at the same driving voltage. Meanwhile, with the improvement of the living standard of people, high-image quality display becomes particularly important, for example, the resolution of the current mainstream product is 4K, but with the further development of the display technology, 8K display has been on schedule, and some products enter the market in small batches. The 8K display has a problem that the transmittance of light is lowered because the resolution is lowered due to the decrease of the pixel aperture ratio, and when the product is to reach the same luminance as that of the 4K product, a higher backlight luminance is required, which causes an increase in backlight power consumption, and in order to increase the transmittance, improvement in performance of the liquid crystal material has become necessary.
Disclosure of Invention
The invention aims to provide a negative large-refraction liquid crystal composition which can reduce the response time of a liquid crystal display product and improve the transmittance.
According to the invention, through the design of the formula, the liquid crystal composition has a larger dielectric constant, so that the photoelectric curve moves leftwards compared with the traditional liquid crystal composition, and higher penetration rate under the same driving voltage can be realized. For improvement of response time, it is very difficult to increase response speed by improving only liquid crystal properties. The maximum effect of the cell thickness on the response time is known from the response time formula. Reducing the cartridge thickness by the improvement in the apparatus is the most practical and effective approach. And when the cell thickness is reduced, the refractive index anisotropy of the liquid crystal must be correspondingly increased in consideration of factors such as viewing angle, brightness, and display taste. The invention designs the parameters of dielectric constant, liquid crystal birefringence and the like of the liquid crystal composition, so that the liquid crystal display product has faster response time and higher transmittance.
Another object of the present invention is to provide the use of the above-mentioned negative large refractive index liquid crystal composition, wherein the liquid crystal composition of the present invention has a large negative dielectric anisotropy and a large optical anisotropy, has a wide nematic phase temperature range, is excellent in performance, and is well suited for use in liquid crystal display devices of various negative display modes including a display mode such as VA, IPS, FFS.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the negative large refractive index liquid crystal composition has large negative dielectric anisotropy and large optical anisotropy, has a wide nematic phase temperature range, can be applied to a negative display mode, and comprises four compound components with the general formula A, B, C, D, wherein the weight percentages of the four compound components are as follows: 42-55% of component A, 35-45% of component B, 10-18% of component C and 0-5% of component D, wherein the sum of the weight percentages of the components is 100%;
the component A is one or more of compounds shown in the following general formula:
wherein R is 1 、R 2 Each independently represents a linear alkyl group having 1 to 5 carbon atoms, a linear alkoxy group having 1 to 5 carbon atoms, or an alkenyl group having 2 to 5 carbon atoms;
A 1 、A 2 independent representationsOr->
Y 1 、Y 2 Each independently represents F or H, and when Y 1 Y in the case of H 2 Also H, when Y 1 Y in the case of F 2 Also F;
the component B is one or more of compounds shown in the following general formula:
wherein R is 3 、R 4 Each independently represents a linear alkyl group having 1 to 5 carbon atoms or a linear alkoxy group having 1 to 5 carbon atoms;
A 3 representation ofOr->
Y 3 、Y 4 Each independently represents F or H, and when Y 3 Y in the case of H 4 Also H, when Y 3 Y in the case of F 4 Also F;
the component C is one or more of compounds shown in the following general formula:
wherein R is 5 、R 6 Each independently represents a linear alkyl group having 1 to 5 carbon atoms or a linear alkoxy group having 1 to 5 carbon atoms, and n represents 1 or 2;
the component D is one or more of compounds shown in the following general formula:
wherein R is 7 、R 8 Each independently represents a linear alkyl group having 2 to 5 carbon atoms or a linear alkoxy group having 2 to 5 carbon atoms;
Y 5 the representation represents F or H.
The A component is a mixture composed of one or more of the following compounds A-1 to A-34:
the component B is a mixture composed of one or more of the following compounds B-1 to B-25:
the component C is a mixture composed of one or more of the following compounds C-1 to C-24:
the D component is a mixture consisting of one or more of the following compounds D-1 to D-20:
in the negative high refractive index liquid crystal composition, the component A accounts for 43-50% by weight, and more preferably 43-48% by weight; the component B is 35 to 43 percent, more preferably 35 to 38 percent; the component C is 10-16%, more preferably 12-16%; the D component is 0% to 4%, more preferably 1% to 5%, still more preferably 1% to 4%.
The negative dielectric anisotropy of the liquid crystal composition is between-3.5 and-3.9, the optical anisotropism is above 0.115, and the nematic phase temperature range is between 80 and 100 ℃.
The liquid crystal composition of the present invention can be suitably used in a liquid crystal display device of a negative display mode including a display mode such as VA, IPS, FFS.
The invention has the advantages that:
the liquid crystal composition has large negative dielectric anisotropy and large optical anisotropy, has a wide nematic phase temperature range, has excellent performance, and is very suitable for being applied to various negative display modes including VA, IPS, FFS and other display modes.
The invention selects four liquid crystal compounds and the proportion thereof to lead the parameters of dielectric constant, liquid crystal birefringence and the like of the liquid crystal composition to reach the required values, thereby leading the liquid crystal display product adopting the liquid crystal composition to have faster response time and higher penetration rate.
Detailed Description
In the invention, the preparation of the liquid crystal composition adopts the following methods: the method comprises the steps of weighing all monomers in a liquid crystal composition by a balance according to weight percentage, adding liquid and then solid in an adding sequence, heating and stirring at 100 ℃ to enable all components to be melted and mixed uniformly, filtering, degassing and finally packaging to obtain a target sample, wherein the adding sequence of the liquid and the solid is free of specific requirements. In addition, the target sample can be obtained by mixing solutions of the components in an organic solvent, such as acetone, chloroform, methanol, etc., thoroughly mixing, removing the solvent, such as by distillation, etc., filtering, degassing, and packaging.
In the present invention, the components of the liquid crystal composition are in weight percent, all temperatures are given in degrees celsius.
All items were tested at room temperature (25 ℃) to give data.
In an embodiment, the physical parameter characteristics tested are as follows:
T NI : nematic phase-isotropic liquid phase transition temperature (°c);
an: refractive index anisotropy at 25 degrees celsius (°c);
Δε: dielectric constant anisotropy at 25 degrees celsius (°c);
wherein, Δε=ε|| - ε, wherein ε|| is the dielectric constant parallel to the molecular axis, ε+| is the dielectric constant perpendicular to the molecular axis, test conditions: 25 ℃ and 1KHz;
no: refractive index of ordinary ray (589 nm,25 ℃ C.);
and (2) ne: refractive index of extraordinary ray (589 nm,25 ℃ C.).
The following are representative examples, but the present invention is not limited to these liquid crystal compositions.
Example 1:
according to the compositions of the liquid crystal compositions shown in Table 1, liquid crystal compositions were prepared by the above-mentioned method according to the present invention, and the liquid crystal compositions were filled in a 3.5. Mu.VA liquid crystal test cell for performance test, and the results of the measured physical property parameters are shown in Table 1.
TABLE 1 composition of liquid crystal composition of example 1 and results of performance test thereof
Example 2:
according to the compositions of the liquid crystal compositions shown in Table 2, liquid crystal compositions were prepared by the above-mentioned method according to the present invention, and the liquid crystal compositions were filled in a 3.5. Mu.VA liquid crystal test cell for performance test, and the results of the measured physical property parameters are shown in Table 2.
TABLE 2 composition of liquid crystal composition of example 2 and results of performance test thereof
Example 3:
according to the compositions of the liquid crystal compositions shown in Table 3, liquid crystal compositions were prepared by the above-mentioned method according to the present invention, and the liquid crystal compositions were filled in a 3.5. Mu.VA liquid crystal test cell to conduct performance test, and the results of the measured physical property parameters are shown in Table 3.
TABLE 3 composition of liquid crystal composition of example 3 and results of performance test thereof
Example 4:
according to the compositions of the liquid crystal compositions shown in Table 4, liquid crystal compositions were prepared by the above-mentioned method according to the present invention, and the liquid crystal compositions were filled in a 3.5. Mu.VA liquid crystal test cell to conduct performance test, and the results of the measured physical property parameters are shown in Table 4.
TABLE 4 composition of liquid crystal composition of example 4 and results of performance test thereof
Example 5:
according to the compositions of the liquid crystal compositions shown in Table 5, liquid crystal compositions were prepared by the above-mentioned method according to the present invention, and the liquid crystal compositions were filled in a 3.5. Mu.VA liquid crystal test cell to conduct performance test, and the results of the measured physical property parameters are shown in Table 5.
TABLE 5 composition of example 5 liquid crystal composition and results of performance test thereof
Example 6:
according to the compositions of the liquid crystal compositions shown in Table 6, liquid crystal compositions were prepared by the above-mentioned method according to the present invention, and the liquid crystal compositions were filled in a 3.5. Mu.VA liquid crystal test cell to conduct performance test, and the results of the measured physical property parameters are shown in Table 6.
TABLE 6 composition of liquid crystal composition of example 6 and results of performance test thereof
The liquid crystal composition has large negative dielectric anisotropy and large optical anisotropy, has a wide nematic phase temperature range, and can obviously shorten response time and improve penetration rate of a liquid crystal display device prepared by the liquid crystal composition.
Claims (6)
1. A negative high refractive index liquid crystal composition characterized in that: the weight percentage is as follows:
4% of compound A-1:
14.5% of Compound A-10:
6% of Compound A-30:
11% of compound A-20:
12.5% of Compound A-22:
4% of compound B-5:
3% of compound B-8:
7% of compound B-7:
8% of compound B-12:
6% of compound B-18:
8% of compound B-19:
6.5% of Compound C-16:
7.5% of Compound C-14:
2% of compound D-4:
2. a negative high refractive index liquid crystal composition characterized in that: the weight percentage is as follows:
3% of compound A-13:
17% of Compound A-10:
6% of Compound A-30:
10% of compound A-20:
11.5% of Compound A-22:
6% of compound B-5:
5% of compound B-8:
6.5% of Compound B-7:
8% of compound B-12:
4% of compound B-18:
6% of Compound B-19:
6% of Compound C-16:
10% of Compound C-14:
1% of compound D-2:
3. a negative high refractive index liquid crystal composition characterized in that: the weight percentage is as follows:
5% of compound A-1:
16% of Compound A-10:
10% of compound A-20:
12% of the compoundA-22：
6% of compound B-5:
3% of compound B-8:
9% of Compound B-7:
8% of compound B-12:
9% of Compound B-18:
9% of Compound B-19:
5% of Compound C-16:
5% of Compound C-14:
3% of compound D-2:
4. a negative high refractive index liquid crystal composition characterized in that: the weight percentage is as follows:
3% of compound A-1:
12% of Compound A-10:
5% of Compound A-12:
6% of Compound A-30:
10.5% of Compound A-20:
11.5% of Compound A-22:
6% of compound B-5:
5% of compound B-8:
6.5% of Compound B-7:
9% of Compound B-12:
3.5% of Compound B-18:
5% of compound B-19:
7.5% of Compound C-16:
8% of Compound C-14:
1.5% of Compound D-2:
5. use of a negative large refractive index liquid crystal composition according to any one of claims 1 to 4 for the preparation of a liquid crystal display device in a negative display mode.
6. The use according to claim 5, characterized in that: the liquid crystal display device includes VA, IPS, and FFS liquid crystal display devices.
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| CN109423304A (en) * | 2017-08-31 | 2019-03-05 | 北京八亿时空液晶科技股份有限公司 | A kind of negative dielectric nematic phase liquid crystal composition and its application |
| CN110872521A (en) * | 2018-08-30 | 2020-03-10 | 捷恩智株式会社 | Liquid crystal composition, liquid crystal display element and application of liquid crystal display element |
| CN111100654A (en) * | 2018-10-26 | 2020-05-05 | 捷恩智株式会社 | Liquid crystal composition, use thereof, and liquid crystal display element |
-
2021
- 2021-10-12 CN CN202111188901.4A patent/CN113789184B/en active Active
Patent Citations (8)
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|---|---|---|---|---|
| CN101072847A (en) * | 2004-12-15 | 2007-11-14 | 大日本油墨化学工业株式会社 | Nematic liquid crystal composition and liquid crystal display element using the same |
| CN102292412A (en) * | 2009-01-22 | 2011-12-21 | Jnc株式会社 | Liquid crystal composition and liquid crystal display device |
| CN102597167A (en) * | 2009-08-26 | 2012-07-18 | 捷恩智株式会社 | Liquid crystal composition and liquid crystal display element |
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