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Liquid crystal composition and application thereof

A technology for liquid crystal compositions and compounds, applied in liquid crystal materials, chemical instruments and methods, etc., can solve the problems of poor mutual solubility, low temperature stability of liquid crystal materials, and small temperature dependence.

Active Publication Date: 2021-05-21
JIANGSU HECHENG DISPLAY TECHCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because liquid crystal media are generally composed of a mixture of components, the mutual solubility of the components is very important, requiring no crystallization and / or smectic phase even at low temperatures, and the temperature dependence of the viscosity As small as possible, but because liquid crystal materials often need to add some additives to maintain the properties of liquid crystal materials, such as UV770, which is often used as a stabilizer (structure is ), the miscibility between these additives and liquid crystal materials in low temperature environment is often poor, so the overall low temperature stability of liquid crystal materials will be affected

Method used

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  • Liquid crystal composition and application thereof
  • Liquid crystal composition and application thereof
  • Liquid crystal composition and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～15 and comparative example 1～4

[0112] A liquid crystal composition, comprising host Host-1 and a compound of formula I; the liquid crystal composition is obtained by mixing the components.

[0113] The composition and performance test results of the host Host-1 are shown in Table 2:

[0114] Table 2

[0115]

[0116]

[0117] By adding different contents of Compound A in Table 3 below to Host-1 (structure Belong to general formula I-1), compound B (structure is Belong to general formula I-1), compound C (structure is Belong to general formula I-4), compound D (structure is Belong to general formula I-6), compound E (structure is Belonging to the general formula I-4) and the comparative compound UV770 constitute Examples 1-15 and Comparative Examples 1-4 of the present invention, and their performance test results are shown in Table 3.

[0118] table 3

[0119]

[0120]

[0121] From the data in Table 3, it can be seen that the liquid crystal composition containing the compound of form...

Embodiment 16～30 and comparative example 5～8

[0123] A liquid crystal composition, comprising host Host-2 and a compound of formula I; the liquid crystal composition is obtained by mixing the components of the compound.

[0124] The composition and performance test results of the host Host-2 are shown in Table 4:

[0125] Table 4

[0126]

[0127] By adding different contents of Compound A, Compound B, Compound C, Compound D, Compound E and comparative compound UV770 in Table 5 below to Host-2, Examples 16-30 and Comparative Examples 5-8 of the present invention are formed. Its performance test results are shown in Table 5.

[0128] table 5

[0129]

[0130]

[0131] From the data in Table 5, it can be seen that the liquid crystal composition containing the compound of formula I of the present invention has better low temperature stability relative to the liquid crystal composition containing UV770, higher VHR-initial, VHR-UV and VHR-high temperature, lower Conductance I / V, the reliability of liquid crystal is...

Embodiment 31～45 and comparative example 9～12

[0133] A liquid crystal composition, comprising host Host-3 and a compound of formula I; the liquid crystal composition is obtained by mixing the components.

[0134] The composition and performance test results of the host Host-3 are shown in Table 6:

[0135] Table 6

[0136]

[0137]

[0138] By adding different contents of Compound A, Compound B, Compound C, Compound D, Compound E and comparative compound UV770 in Table 7 below to Host-3, Examples 31-45 and Comparative Examples 9-12 of the present invention were formed, Its performance test results are shown in Table 7.

[0139] Table 7

[0140]

[0141]

[0142] From the data in Table 7, it can be seen that the liquid crystal composition containing the compound of formula I of the present invention has better low-temperature stability relative to the liquid crystal composition containing UV770, higher VHR-initial, VHR-UV and VHR-high temperature, lower Conductance I / V, the reliability of liquid crystal is s...

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Abstract

The invention provides a liquid crystal composition and application thereof. The liquid crystal composition comprises at least one compound as shown in a formula I and at least one compound as shown in a formula II-1 and / or a formula II-2. The liquid crystal composition provided by the invention can maintain low-temperature stability (better than that in the prior art) on the premise of proper optical anisotropy and dielectric anisotropy, relatively high clearing point and relatively low rotational viscosity, has a relatively high voltage holding ratio at high temperature and ultraviolet light, is relatively low in liquid crystal conductivity value, the reliability and stability of the liquid crystal composition are remarkably improved, and the liquid crystal composition is a liquid crystal material with high reliability and good stability, can meet the application requirements of the liquid crystal material in various display modes, is particularly suitable for high-display-performance liquid crystal display devices in an IPS display mode, and has wide application prospects.

Description

technical field [0001] The invention belongs to the technical field of liquid crystal materials, and in particular relates to a liquid crystal composition and its application. Background technique [0002] A liquid crystal display (Liquid Crystal Display, LCD) is widely used in various fields such as electronic products, and is mainly used for direct-view displays and projection-type displays. Among the various electro-optic modes of liquid crystals, the representative electro-optic modes are twisted nematic (TN type), super twisted nematic (STN type), optically compensated bending (OCB type) and electronically controlled birefringence (ECB type) and its various variants, etc.; the above-mentioned modes are all generated using an electric field, and the electric field is perpendicular to the substrate or the liquid crystal layer. In addition to the above-mentioned electro-optic modes, there are also electro-optic modes utilizing an electric field parallel to the substrate o...

Claims

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Application Information

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IPC IPC(8): C09K19/44C09K19/34
CPCC09K19/44C09K19/3483C09K19/04C09K19/066C09K19/08C09K19/10C09K19/30C09K2019/0414
Inventor 陈昭远姚利芳徐海彬陈诺丁文全徐爽
Owner JIANGSU HECHENG DISPLAY TECHCO
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