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Liquid crystal composition and application thereof

A technology for liquid crystal compositions and compounds, applied in the directions of liquid crystal materials, chemical instruments and methods, etc., can solve the problems such as the decrease of the overall reliability of liquid crystal compositions, the limitation of practical application, the deterioration of yield, etc., and achieve low-temperature storage stability and contrast improvement. , high penetration rate, reliability and stability improvement effect

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

The basic functions of antioxidants and UV light stabilizers are to capture the generated free radicals, inhibit the chain reaction of free radicals, shield or absorb ultraviolet light, and prevent molecular chains from being excited to generate free radicals. However, with the introduction of these additives, the finished product The problem of deterioration of the efficiency is becoming more and more serious, and the overall reliability of the liquid crystal composition is reduced. At the same time, there are also problems with the miscibility of the above-mentioned modifying additives and the matrix liquid crystal, which limits the practical application.

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 1～9 and comparative example 1～2

[0136] A liquid crystal composition, comprising host Host-1 and a compound of formula I; the liquid crystal composition is obtained by mixing the components.

[0137] The components and performance tests of the host Host-1 are shown in Table 2:

[0138] Table 2

[0139]

[0140]

[0141] 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-4), compound C (structure is Belong to general formula I-6) and comparative compound UV770 (structure is ), constituting Examples 1-9 and Comparative Examples 1-2 of the present invention, the performance test results of which are shown in Table 3.

[0142] table 3

[0143]

[0144] From the data in Table 3, it can be seen that the liquid crystal composition comprising the compound of formula I of the present invention has higher VHR-initial, VHR-UV and VHR-high temperature, lower conductance I / V and higher relat...

Embodiment 10～18 and comparative example 3～4

[0146] 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.

[0147] The components and performance tests of the host Host-2 are shown in Table 4:

[0148] Table 4

[0149]

[0150] By adding different contents of Compound A, Compound B, Compound C and comparative compound UV770 in the following Table 5 to Host-2, Examples 10-18 of the present invention and Comparative Examples 3-4 are formed, and the performance test results are as follows Table 5 shows.

[0151] table 5

[0152]

[0153] From the data in Table 5, it can be seen that the liquid crystal composition comprising the compound of formula I of the present invention has higher VHR-initial, VHR-UV and VHR-high temperature, lower conductance I / V and higher relative to the liquid crystal composition containing UV770. With high transmittance, the reliability of liquid crystal is significantly improve...

Embodiment 19～27、 comparative example 5～6

[0155] A liquid crystal composition, comprising host Host-3 and a compound of formula I; the liquid crystal composition is obtained by mixing the components.

[0156] The components and performance tests of the host Host-3 are shown in Table 6:

[0157] Table 6

[0158]

[0159]

[0160] By adding different contents of Compound A, Compound B, Compound C and comparative compound UV770 in the following Table 7 to Host-3 respectively, Examples 19-27 of the present invention and Comparative Examples 5-6 are formed, and the performance test results are shown in the table 7.

[0161] Table 7

[0162]

[0163] 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 higher VHR-initial, VHR-UV and VHR-high temperature, lower conductance I / V and higher relative to the liquid crystal composition containing UV770. High transmittance, significantly improved liquid crystal reliability, contras...

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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, at least one compound as shown in a formula II, at least one compound as shown in a formula III-1 and / or a formula III-2 and at least one compound as shown in a formula IV. The liquid crystal composition provided by the invention has higher charge retention rate, higher penetration rate and lower conductivity I / V on the premise of having proper optical anisotropy and dielectric anisotropy and higher clearing point, the low-temperature storage stability and contrast ratio are improved, the reliability and stability of the liquid crystal composition are remarkably improved, the liquid crystal composition can meet the application requirements of the liquid crystal material in various display modes, is suitable for liquid crystal display devices with high display performance, 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] Liquid crystal display elements are used in various measuring instruments represented by clocks and calculators, automotive panels, word processors, electronic notebooks, printers, computers, televisions, clocks, and advertising display panels. Among the various display methods of liquid crystals, the representative display methods are twisted nematic (TN type), super twisted nematic (STN type), VA type or VA type characterized by vertical alignment of thin film transistors (TFT). Transverse electric field effect type (IPS type) and FFS type characterized by horizontal orientation. For the liquid crystal composition used in the above-mentioned liquid crystal display element, it is required that the liquid crystal composition has higher stability with respect to external f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/44
CPCC09K19/44
Inventor 赵飞刘云云
Owner JIANGSU HECHENG DISPLAY TECHCO
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