CN113667491B - Liquid crystal composition with negative dielectric anisotropy and application - Google Patents
Liquid crystal composition with negative dielectric anisotropy and application Download PDFInfo
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- CN113667491B CN113667491B CN202111023024.5A CN202111023024A CN113667491B CN 113667491 B CN113667491 B CN 113667491B CN 202111023024 A CN202111023024 A CN 202111023024A CN 113667491 B CN113667491 B CN 113667491B
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 68
- 239000000203 mixture Substances 0.000 title claims abstract description 46
- 150000001875 compounds Chemical class 0.000 claims abstract description 84
- 238000000034 method Methods 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 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 2
- 101000623895 Bos taurus Mucin-15 Proteins 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 5
- 230000003287 optical effect Effects 0.000 abstract description 3
- 125000004432 carbon atom Chemical group C* 0.000 description 9
- 125000000217 alkyl group Chemical group 0.000 description 5
- 125000003342 alkenyl group Chemical group 0.000 description 4
- 238000009472 formulation Methods 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 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
- 210000004027 cell Anatomy 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 238000007872 degassing 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
- 239000000178 monomer Substances 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000002858 crystal cell Anatomy 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000004065 semiconductor 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 liquid crystal composition with negative dielectric anisotropy and application thereof, and belongs to the technical field of liquid crystal materials. The liquid crystal composition comprises four compound components of I, II, III and IV, wherein the weight percentages of the four compound components are as follows: 38-80% of component I, 18-60% of component II, 1-8% of component III and 0-6% of component IV. The liquid crystal composition has a large absolute value of dielectric anisotropy, proper optical anisotropy and a wide nematic phase temperature range, can be well applied to a low-voltage LCOS liquid crystal display, and can also be applied to other related liquid crystal wide-temperature displays, so that a liquid crystal device can be used in high-heat and high-cold areas, and the problem that the liquid crystal material used in the LCOS at present cannot meet the liquid crystal requirement of low voltage is solved.
Description
Technical Field
The invention relates to a liquid crystal composition and application thereof, in particular to a liquid crystal composition with larger dielectric anisotropy and capable of being driven by low voltage and application thereof, and belongs to the technical field of liquid crystal materials.
Background
LCOS liquid crystal displays (i.e., liquid Crystal on Silicon) are new products introduced in the recent market, and are used in projection devices, glasses-type micro-vision displays.
LCOS (Liquid Crystal on Silicon ) displays are a new type of reflective projection display devices that employ semiconductor silicon technology to control the liquid crystal and thus "project" a color picture. LCOS display has the characteristics of high light utilization efficiency, small volume, high aperture ratio, mature manufacturing technology, etc., and can easily realize high resolution and full color expression. It is expected that LCOS displays will be of great advantage in future large screen display applications. However, LCOS has high requirements on driving voltage, response time and contrast, for example, in the working process, since backlight brightness is high and heat is easily generated, the liquid crystal needs to have a high clearing point, and low driving voltage is beneficial to reducing power consumption, so that a large dielectric constant is required. And large birefringence can be matched with low box thickness, so that quick response can be realized.
Disclosure of Invention
The invention aims to provide a liquid crystal composition with negative dielectric anisotropy, so as to solve the problem that the liquid crystal material used in the LCOS at present cannot meet the requirement of low-voltage liquid crystal.
Another object of the present invention is to provide the use of the above liquid crystal composition having negative dielectric anisotropy, which has large negative dielectric anisotropy, and suitable birefringence, and can be well applied to low voltage LCOS display.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a liquid crystal composition with negative dielectric anisotropy comprises four compound components of I, II, III and IV, wherein the weight percentages of the four compound components are as follows: 38-80% of component I, 18-60% of component II, 1-8% of component III and 0-6% of component IV, wherein the sum of the weight percentages of the components is 100%;
the component I 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 or an alkenyl group having 2 to 5 carbon atoms;
A 1 representation ofOr->
The component II 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 an alkenyl group having 2 to 5 carbon atoms, and L1 represents 1 or 2;
the III component is one or more of the compounds shown in the following general formula:
wherein R is 5 ，R 6 Each independently represents a straight-chain alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms;
the IV component is one or more of the compounds shown in the following general formula:
wherein R is 7 Represents a linear alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms; r is R 8 Represents a linear alkyl group having 1 to 5 carbon atoms.
The component I is a mixture of one or more of the following compounds I-1 to I-15:
the component II is a mixture of one or more of the following compounds II-1 to II-8:
the component III is a mixture of one or more of the following compounds III-1 to III-5:
the IV component is a mixture of one or more of the following compounds IV-1 to IV-13:
in the liquid crystal composition with negative dielectric anisotropy, the component I comprises, by weight, 38% -78%, preferably 38.5% -70%, more preferably 39% -68%, and most preferably 40% -66%; the component II is 18 to 58 percent, preferably 18.5 to 57.5 percent, more preferably 19 to 57 percent, and most preferably 20 to 56 percent; the III component is 1 to 7.5 percent, preferably 1.1 to 7 percent, more preferably 1.1 to 6.5 percent, and most preferably 1.5 to 6 percent; the IV component is 0 to 5%, preferably 0.2 to 4.5%, more preferably 0.3 to 4%, most preferably 0.5 to 3%.
The liquid crystal composition has negative dielectric anisotropy of-7.3 to-10.0, optical anisotropy of 0.114 to 0.117 and nematic phase temperature range of-10 to 112 ℃.
The liquid crystal composition with negative dielectric anisotropy can be well applied to liquid crystal display devices of a negative display mode, particularly to low-voltage (3.5V) LCOS liquid crystal displays, and can also be applied to other related liquid crystal wide-temperature displays.
The invention has the advantages that:
the liquid crystal composition has a large absolute value of dielectric anisotropy, proper optical anisotropy and a wide nematic phase temperature range, can be well applied to a low-voltage LCOS liquid crystal display, and can also be applied to other related liquid crystal wide-temperature displays, so that a liquid crystal device can be used in high-heat and high-cold areas, and the problem that the liquid crystal material used in the LCOS at present cannot meet the liquid crystal requirement of low voltage is solved.
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 110 ℃ to enable all the 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.
The liquid crystal monomer components referred to in this example were labeled by the labeling method shown in Table 1.
Table 1 code lookup table
In the embodiment of the invention, the components of the liquid crystal composition are in weight percent, and all temperatures are given in degrees celsius. All items were tested at room temperature (25 ℃) to give data.
In the embodiment of the invention, the characteristics of the physical parameters tested are as follows:
T NI : nematic phase-isotropic liquid phase transition temperature [ DEGC ]]；
An: refractive index anisotropy (589 nm,25 ℃);
Δε: dielectric anisotropy (1 KHz,25 ℃);
k11: a splay elastic constant;
k33: a flexural spring constant;
v10: a threshold voltage, a voltage required for the transmittance of the liquid crystal cell to reach 90%;
v90: saturated voltage, the voltage required by the transmittance of the liquid crystal box to reach 10%;
ton: the brightness of the cell is from 10% to 90% and the time required for the liquid crystal to twist under applied voltage.
toff: the brightness of the cell was from 90% to 10% with no voltage applied and the time required for the liquid crystal to twist.
The following are representative examples given, but the present invention is not limited to these several liquid crystal compositions.
Example 1: liquid crystal compositions were prepared with the weight percentages indicated in table 2 below and the performance parameters are shown in table 2.
TABLE 2 example 1 liquid crystal composition compounding ratio and Performance parameters
Example 2: liquid crystal compositions were prepared with the weight percentages indicated in table 3 below and the performance parameters are shown in table 3.
TABLE 3 formulation and Performance parameters of the liquid Crystal composition of example 2
Example 3: liquid crystal compositions were prepared with the weight percentages indicated in table 4 below and the performance parameters are shown in table 4.
TABLE 4 example 3 compounding ratio and Performance parameters of liquid Crystal composition
Example 4: liquid crystal compositions were prepared with the weight percentages of the components shown in Table 5 below, and the performance parameters are shown in Table 5.
TABLE 5 formulation and Performance parameters of the liquid Crystal composition of example 4
Example 5: liquid crystal compositions were prepared with the following components in weight percent shown in Table 6, and the performance parameters are shown in Table 6.
TABLE 6 formulation and Performance parameters of the liquid Crystal composition of example 5
/>
Example 6: liquid crystal compositions were prepared with the weight percentages of the components shown in Table 7 below, and the performance parameters are shown in Table 7.
TABLE 7 formulation and Performance parameters of the liquid Crystal composition of example 6
/>
As can be seen from the above examples, the liquid crystal composition of the present invention has a large negative dielectric anisotropy and appropriate birefringence, and can be well applied to low voltage LCOS display.
Claims (8)
1. A liquid crystal composition having negative dielectric anisotropy, characterized in that: the method comprises the following steps of: 6% of compound I-1:
7% of compound I-4:
4% of compound I-6:
6% of compound I-7:
11% of compound I-8:
8% of compound I-9:
8% of compound I-1:
16% of the compound I-2:
13% of the compound I-5:
17% of compound I-6:
2% of the compound III-1:
2% of compound IV-1:
2. a liquid crystal composition having negative dielectric anisotropy, characterized in that: the method comprises the following steps of: 6% of compound I-1:
7% of compound I-4:
4% of compound I-6:
6% of compound I-7:
11% of compound I-8:8% of compound I-9: />
8% of compound I-1:
16% of the compound I-2:
13% of the compound I-5:
17% of compound I-6:
2% of the compound III-1:
2% of compound IV-9:
3. a liquid crystal composition having negative dielectric anisotropy, characterized in thatThe method comprises the following steps: the method comprises the following steps of: 8% of compound I-4:
7% of compound I-6:8% of compound I-7: />
7% of compound I-8:
8% of compound I-9:
9% of Compound I-1:
16% of the compound I-2:
12% of Compound I-5:
14% of the compound I-6:
6% of compound I-7:
5% of the compound III-1:
4. a liquid crystal composition having negative dielectric anisotropy, characterized in that: the method comprises the following steps of: 7% of compound I-4:
3% of compound I-5:
5% of compound I-6:
8% of compound I-7:
9% of compound I-8:
10% of compound I-9:
8% of compound I-1:
16% of the compound I-2:
15% of the compound I-5:
17% of compound I-6:
2% of the compound III-1:
5. a liquid crystal composition having negative dielectric anisotropy, characterized in that: the method comprises the following steps of: 16% of compound I-1:
10% of compound I-3:
10% of compound I-4:
6% of compound I-5:
4% of compound I-6:6% of compound I-7: />
10% of compound I-8:
10% of compound I-9:
6% of compound I-13:
7% of compound I-2:
5% of compound I-5:
8% of compound I-6:
2% of the compound III-1:
6. a liquid crystal composition having negative dielectric anisotropy, characterized in that: the method comprises the following steps of: 10% of compound I-1:
8% of compound I-3:
8% of compound I-4:
6% of compound I-5:
4% of compound I-6:
6% of compound I-7:
10% of compound I-8:
10% of compound I-9:
4% of compound I-13:
6% of compound I-1:
7% of compound I-2:
5% of compound I-5:
9% of Compound I-6:
4% of compound I-7:
3% of the compound III-1:
7. use of the liquid crystal composition having negative dielectric anisotropy according to any one of claims 1 to 6 for manufacturing a liquid crystal display device of a negative display mode.
8. The use according to claim 7, characterized in that: the liquid crystal display device is a low-voltage LCOS liquid crystal display.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200528540A (en) * | 2003-11-27 | 2005-09-01 | Samsung Electronics Co Ltd | A liquid crystalline compound for vertical alignment and a liquid crystalline composition comprising the same |
| CN104136575A (en) * | 2011-12-21 | 2014-11-05 | Dic株式会社 | Nematic liquid crystal composition and liquid crystal display element using same |
| CN104334685A (en) * | 2012-07-04 | 2015-02-04 | Dic株式会社 | Nematic liquid crystal composition and liquid crystal display element using same |
| CN104471029A (en) * | 2013-02-12 | 2015-03-25 | Dic株式会社 | Liquid Crystal Composition And Liquid Crystal Display Element Using Same |
| CN105339464A (en) * | 2013-06-26 | 2016-02-17 | 捷恩智株式会社 | Liquid crystal composition, and liquid crystal display element |
| CN105358655A (en) * | 2013-07-11 | 2016-02-24 | 捷恩智株式会社 | Liquid crystal composition and liquid crystal display element |
| CN107109233A (en) * | 2015-01-20 | 2017-08-29 | 捷恩智株式会社 | Liquid-crystal composition and liquid crystal display cells |
| CN110662819A (en) * | 2017-05-30 | 2020-01-07 | 默克专利股份有限公司 | Liquid-crystalline medium |
-
2021
- 2021-09-01 CN CN202111023024.5A patent/CN113667491B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200528540A (en) * | 2003-11-27 | 2005-09-01 | Samsung Electronics Co Ltd | A liquid crystalline compound for vertical alignment and a liquid crystalline composition comprising the same |
| CN104136575A (en) * | 2011-12-21 | 2014-11-05 | Dic株式会社 | Nematic liquid crystal composition and liquid crystal display element using same |
| CN104334685A (en) * | 2012-07-04 | 2015-02-04 | Dic株式会社 | Nematic liquid crystal composition and liquid crystal display element using same |
| CN104471029A (en) * | 2013-02-12 | 2015-03-25 | Dic株式会社 | Liquid Crystal Composition And Liquid Crystal Display Element Using Same |
| CN105339464A (en) * | 2013-06-26 | 2016-02-17 | 捷恩智株式会社 | Liquid crystal composition, and liquid crystal display element |
| CN105358655A (en) * | 2013-07-11 | 2016-02-24 | 捷恩智株式会社 | Liquid crystal composition and liquid crystal display element |
| CN107109233A (en) * | 2015-01-20 | 2017-08-29 | 捷恩智株式会社 | Liquid-crystal composition and liquid crystal display cells |
| CN110662819A (en) * | 2017-05-30 | 2020-01-07 | 默克专利股份有限公司 | Liquid-crystalline medium |
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