CN113667491A - 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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- CN113667491A CN113667491A CN202111023024.5A CN202111023024A CN113667491A CN 113667491 A CN113667491 A CN 113667491A CN 202111023024 A CN202111023024 A CN 202111023024A CN 113667491 A CN113667491 A CN 113667491A
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- liquid crystal
- component
- crystal composition
- dielectric anisotropy
- negative dielectric
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 76
- 239000000203 mixture Substances 0.000 title claims abstract description 53
- 150000001875 compounds Chemical class 0.000 claims abstract description 21
- 101000623895 Bos taurus Mucin-15 Proteins 0.000 claims abstract description 9
- 125000004432 carbon atom Chemical group C* 0.000 claims description 10
- 125000000217 alkyl group Chemical group 0.000 claims description 7
- 125000003342 alkenyl group Chemical group 0.000 claims description 5
- 239000000463 material Substances 0.000 abstract description 5
- 230000003287 optical effect Effects 0.000 abstract description 3
- 238000009472 formulation Methods 0.000 description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 2
- 238000007872 degassing Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001914 filtration 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
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000003960 organic solvent Substances 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
-
- 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
Abstract
The invention relates to a liquid crystal composition with negative dielectric anisotropy and application thereof, belonging to the technical field of liquid crystal materials. The liquid crystal composition comprises four compound components of I, II, III and IV, and the weight percentages of the four compound components are respectively as follows: 38-80% of the component I, 18-60% of the component II, 1-8% of the component III and 0-6% of the 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 low-voltage LCOS liquid crystal displays, and can also be applied to wide-temperature display of other related liquid crystals, so that a liquid crystal device can be used in high-temperature and high-cold areas, and the problem that the liquid crystal material used in the existing LCOS cannot meet the requirement of low-voltage liquid crystals is solved.
Description
Technical Field
The invention relates to a liquid crystal composition and application thereof, in particular to a liquid crystal composition which has larger dielectric anisotropy and can be driven by low voltage and application thereof, belonging to the technical field of liquid crystal materials.
Background
LCOS Liquid Crystal displays (i.e., Liquid Crystal on Silicon) are new products introduced into the market in recent years, and are applied to projection apparatuses and glasses type microdisplays.
LCOS (Liquid Crystal on Silicon) displays are a new type of reflective projection display device that uses semiconductor Silicon technology to control the Liquid Crystal and "project" color images. The LCOS display has the characteristics of high light utilization efficiency, small volume, high aperture ratio, mature manufacturing technology, and the like, and can easily realize high resolution and sufficient color expression. It is therefore expected that LCOS displays will have great advantages for future large screen display applications. However, LCOS has high requirements for driving voltage, response time, and contrast, for example, in the working process, since backlight brightness is high and heat is easily generated, a clearing point of liquid crystal is required to be high, and a low driving voltage is beneficial to reducing power consumption, and thus a high dielectric constant is required. And large birefringence can be matched with low cell thickness, thus realizing fast response.
Disclosure of Invention
The invention aims to provide a liquid crystal composition with negative dielectric anisotropy, which solves 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 application of the liquid crystal composition with negative dielectric anisotropy, which has large negative dielectric anisotropy and proper birefringence and can be well applied to low voltage LCOS display.
In order to achieve the purpose, the invention adopts the following technical scheme:
a liquid crystal composition with negative dielectric anisotropy comprises four compound components I, II, III and IV, and the weight percentages of the four compound components are respectively 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 is1，R2Each independently represents a linear alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms;
A1to represent
Or
The component II is one or more of the compounds shown in the following general formula:
wherein R is3，R4Each independently represents a C1-5 linear alkyl group or a C2-5 alkenyl group, and L1 represents 1 or 2;
the component III is one or more of compounds shown in the following general formula:
wherein R is5，R6Each independently represents a linear 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 is7A linear alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms; r8Represents 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 III component 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 I component accounts for 38-78 percent, preferably 38.5-70 percent, more preferably 39-68 percent and most preferably 40-66 percent in percentage by weight; 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 0-5%, preferably 0.2-4.5%, more preferably 0.3-4%, and most preferably 0.5-3%.
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 of-10 to 112 ℃.
The liquid crystal composition with negative dielectric anisotropy can be well applied to a liquid crystal display device with a negative display mode, particularly a low-voltage (voltage is 3.5V) LCOS (liquid Crystal on silicon) liquid crystal display, 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 low-voltage LCOS liquid crystal displays, and can also be applied to wide-temperature display of other related liquid crystals, so that a liquid crystal device can be used in high-temperature and high-cold areas, and the problem that the liquid crystal material used in the existing LCOS cannot meet the requirement of low-voltage liquid crystals is solved.
Detailed Description
In the invention, the liquid crystal composition is prepared by the following method: the method comprises the steps of weighing each monomer in the liquid crystal composition according to weight percentage by using a balance, adding liquid and then adding solid in an adding sequence, wherein the adding of the solid has no specific requirement, heating and stirring at 110 ℃ to enable all components to be melted and mixed uniformly, filtering, degassing and finally packaging to obtain a target sample. Alternatively, solutions of the components in an organic solvent, such as acetone, chloroform, methanol, etc., may be mixed, and after thorough mixing, the solvent may be removed, such as by distillation, etc., followed by filtration, degassing, and packaging to obtain the desired sample.
The liquid crystal monomer components referred to in this example were labeled by the labeling method shown in table 1.
TABLE 1 code comparison Table
In the examples of the present 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 present invention, the physical parameter characteristics tested are as follows:
TNI: nematic phase-isotropic liquid phase transition temperature of [ ° c]；
Δ n: refractive index anisotropy (589nm, 25 ℃);
Δ ε: dielectric anisotropy (1KHz, 25 ℃);
k11: a splay elastic constant;
k33: a bending elastic constant;
v10: threshold voltage, voltage required for the transmittance of the liquid crystal box to reach 90%;
v90: saturation voltage, the voltage required for the transmittance of the liquid crystal box to reach 10%;
ton: under the applied voltage, the brightness of the liquid crystal box is from 10% to 90%, and the time required for the liquid crystal to twist is long.
toff: under the condition of no voltage application, the brightness of the liquid crystal box is from 90% to 10%, and the time required for the liquid crystal to twist is long.
The following are representative examples, but the present invention is not limited to these liquid crystal compositions.
Example 1: the liquid crystal compositions were prepared according to the weight percentages shown in Table 2 below, and the performance parameters are shown in Table 2.
TABLE 2 formulation and Performance parameters of the liquid Crystal composition of example 1
Example 2: the liquid crystal compositions were prepared according to the weight percentages shown 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: the liquid crystal compositions were prepared according to the weight percentages shown in Table 4 below, and the performance parameters are shown in Table 4.
TABLE 4 formulation and Performance parameters of the liquid Crystal composition of example 3
Example 4: the liquid crystal compositions were prepared according to the weight percentages 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: the liquid crystal compositions were prepared according to the weight percentages shown in Table 6 below, 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: the liquid crystal compositions were prepared according to the weight percentages 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 a suitable birefringence, and can be well applied to low voltage LCOS display.
Claims (10)
1. A liquid crystal composition having negative dielectric anisotropy, characterized by: comprises four compound components of I, II, III and IV, and the weight percentages are respectively: 38-80% of the I component, 18-60% of the II component, 1-8% of the III component and 0-6% of the IV component;
the component I is a compound shown as the following general formula:
the component II is a compound shown as the following general formula:
the component III is a compound shown as the following general formula:
the IV component is a compound shown as the following general formula:
wherein R is1、R2、R3、R4、R5、R6、R7Each independently represents a linear alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms; r8Represents a linear alkyl group having 1 to 5 carbon atoms;
A1to represent
Or
L1 represents 1 or 2.
2. The liquid crystal composition having negative dielectric anisotropy according to claim 1, characterized in that: the component I is one or more of compounds I-1 to I-15:
3. the liquid crystal composition having negative dielectric anisotropy according to claim 1, characterized in that: the component II is one or more of compounds II-1 to II-8:
4. the liquid crystal composition having negative dielectric anisotropy according to claim 1, characterized in that: the III component is one or more of compounds III-1 to III-5:
5. the liquid crystal composition having negative dielectric anisotropy according to claim 1, characterized in that: the IV component is one or more of compounds IV-1 to IV-13:
6. the liquid crystal composition having negative dielectric anisotropy according to claim 1, characterized in that: in the liquid crystal composition, the weight percentage of the component I is 38-78%, the weight percentage of the component II is 18-58%, the weight percentage of the component III is 1-7.5%, and the weight percentage of the component IV is 0-5%.
7. The liquid crystal composition having negative dielectric anisotropy according to claim 6, wherein: in the liquid crystal composition, the weight percentage of the component I is 38.5-70%, the weight percentage of the component II is 18.5-57.5%, the weight percentage of the component III is 1.1-7%, and the weight percentage of the component IV is 0.2-4.5%.
8. The liquid crystal composition having negative dielectric anisotropy according to claim 7, wherein: in the liquid crystal composition, the I component accounts for 39-68 wt%, the II component accounts for 19-57 wt%, the III component accounts for 1.1-6.5 wt%, and the IV component accounts for 0.3-4 wt%.
9. Use of a liquid crystal composition having negative dielectric anisotropy according to any one of claims 1 to 8 for the preparation of a liquid crystal display device of negative-type display mode.
10. Use according to claim 9, characterized in that: the liquid crystal display device is a low-voltage LCOS liquid crystal display.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111023024.5A CN113667491B (en) | 2021-09-01 | 2021-09-01 | Liquid crystal composition with negative dielectric anisotropy and application |
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| CN202111023024.5A CN113667491B (en) | 2021-09-01 | 2021-09-01 | Liquid crystal composition with negative dielectric anisotropy and application |
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| CN113667491B CN113667491B (en) | 2024-01-19 |
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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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