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Negative dielectric anisotropic liquid crystal composition containing dichlorobicyclohexyl compounds and application thereof

A technology of liquid crystal composition and bicyclohexane, which is applied in the direction of liquid crystal materials, nonlinear optics, chemical instruments and methods, and can solve the problems of accelerating the response speed and slow response speed of liquid crystal displays

Active Publication Date: 2014-04-23
BEIJING BAYI SPACE LCD MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The liquid crystal display provided by the prior art has the disadvantage of slow response speed. The response speed of the liquid crystal display is mainly limited by the thickness of the liquid crystal layer and the rotational viscosity of the liquid crystal. Reducing the thickness of the liquid crystal layer can effectively speed up the response speed of the liquid crystal display, which needs to be improved. Optical Anisotropy of Liquid Crystal Compositions

Method used

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  • Negative dielectric anisotropic liquid crystal composition containing dichlorobicyclohexyl compounds and application thereof
  • Negative dielectric anisotropic liquid crystal composition containing dichlorobicyclohexyl compounds and application thereof
  • Negative dielectric anisotropic liquid crystal composition containing dichlorobicyclohexyl compounds and application thereof

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preparation example Construction

[0075] The preparation of the liquid crystal composition in the examples of the present invention adopts the following method: the preparation of the uniform liquid crystal adopts the thermal dissolution method commonly used in the industry, and first weighs the liquid crystal compound by weight percentage with a balance, wherein there is no specific requirement for the order of weighing and adding, usually Liquid crystal compounds are weighed and mixed in order of melting point from high to low, heated and stirred at 60-100°C to make each component melt evenly, then filtered, rotary evaporated, and finally packaged to obtain the target sample.

[0076] Unless otherwise stated, percentages in this context are by weight and all temperatures are given in degrees Celsius. Use the following abbreviations:

[0077] △n is optical anisotropy (20°C, 589nm); Δε is dielectric anisotropy (25°C, 1000Hz); V 10 is the threshold voltage, which is the characteristic voltage when the relative...

Embodiment 1

[0093] The liquid crystal compound in the following weight percentages was taken, and the liquid crystal composition was prepared by the above-mentioned preparation method. The specific proportion and the performance parameters of the obtained liquid crystal composition (not the individual components) are shown in Table 1.

[0094] Table 1: The weight percent of each component in the liquid crystal composition of Example 1 and the performance parameters of the overall composition

[0095] The structural formula number of the component the code Weight percentage (%) performance parameters parameter value IA-5 2HHFF3 17 △n 0.095 IIA-2 3HWO2 10 △ε -2.8 IIA-4 5HWO2 8 V 10 2.50 IIB-1 2HHWO2 4 n 19 IIB-2 3HHWO2 10 Cp 76 IIB-4 5HHWO2 6 τ off 4.0 IIC-1 2HHW1 9 △n*d 0.32 IIC-2 3HHW1 8 gamma 1 75 IIIA-4 5HB2 6

[0096] IIIB-2 3HBO1 6 IIIB-6 ...

Embodiment 2

[0098] The following liquid crystal compounds were taken in the following weight percentages, and the liquid crystal composition was prepared by the above-mentioned preparation method. The specific proportion and the performance parameters of the obtained liquid crystal composition (not the individual components) are shown in Table 2.

[0099] Table 2: The weight percent of each component in the liquid crystal composition of Example 2 and the performance parameters of the overall composition

[0100] The structural formula number of the component the code Weight percentage (%) performance parameters parameter value IB-5 2HH(2F)3 20 △n 0.095 IA-6 3HHFF3 20 △ε -2.0 IIB-1 2HHWO2 10 V 10 3.05 IIIA-4 5HB2 6 n 15 IIIB-2 3HBO1 6 Cp 80 IIIB-6 3HBO2 6 τ off 3.0 IIIB-7 4HBO2 6 △n*d 0.32 IIIB-8 5HBO2 6 gamma 1 55 IVA-10 4HBGB3 7 IVA-13 5HBGB2 7 IVA-14 ...

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Abstract

The invention relates to a negative dielectric anisotropic liquid crystal composition or rather a negative dielectric anisotropic liquid crystal composition containing one or more dichlorobicyclohexyl compounds and an application thereof. The composition is mainly used for electrooptical adjustment and is especially suitable for FFS (fringe field switching) displays, IPS (in-plane switching) displays and MVA (multi-domain vertical alignment) / PVA (patterned vertical alignment) / PSVA (polymer-stabilized vertical alignment) configuration VA (vertical alignment) type displays. The liquid crystal composition provided by the invention has high optical anisotropy, excellent low-temperature intersolubility and good high temperature and UV (ultraviolet) stability, and is suitable for fast response display devices in various display modes. The defect of relatively low optical anisotropy is overcome, the optical anisotropy of the composition is effectively improved, and the thickness of the liquid crystal layer is reduced, thereby increasing the response speed of the liquid crystal displays. Applied to the liquid crystal display devices, the liquid crystal composition can obviously solve the problem of slow response of the devices and has huge application prospects and market values.

Description

technical field [0001] The invention relates to the field of liquid crystal compositions, in particular to a liquid crystal composition with negative dielectric anisotropy, more precisely, the invention relates to a liquid crystal composition with negative dielectric anisotropy containing one or several difluorobicyclohexane structural compounds Liquid crystal composition and its application; the composition is mainly used for electro-optic adjustment, especially for FFS display, IPS display and VA display with MVA / PVA / PSVA configuration. Background technique [0002] In 1888, Austrian botanist Friedrich Reinitzer discovered the first liquid crystal material, cholesterol benzoate (cholesteryl benzoate), which is a liquid crystal, which means that a substance has both the fluidity of a liquid and a certain arrangement characteristic similar to a crystal. M.Born (1916) and K.Lichtennecker (1926) respectively discovered and studied the dielectric anisotropy of liquid crystals. ...

Claims

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Application Information

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IPC IPC(8): C09K19/30G02F1/1333G02F1/139
Inventor 陈海光陈卯先杭德余姜天孟田会强储士红贺树芳孙丽丽张琳
Owner BEIJING BAYI SPACE LCD MATERIALS TECH
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