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Liquid crystal composition and display unit containing the same

A technology of liquid crystal composition and display unit, applied in liquid crystal materials, optics, instruments, etc., can solve problems such as low birefringence and viscosity, and achieve good refractive anisotropy, good low-temperature storage, and good dielectric anisotropy The effect of the opposite sex

Active Publication Date: 2017-10-24
DAXIN MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The aforementioned compounds with benzofuran structure have been recently used to make liquid crystal materials because of their wide liquid crystal phase temperature range, good low-temperature mutual solubility, low birefringence and viscosity, but there is no research on this compound with benzofuran structure. Specific documents or patents on the combination of compounds with furan structure and other liquid crystal compounds

Method used

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  • Liquid crystal composition and display unit containing the same
  • Liquid crystal composition and display unit containing the same
  • Liquid crystal composition and display unit containing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] The liquid crystal compositions of Example 1, Example 2 and Comparative Example 1 were mixed at 25° C. to obtain liquid crystal compositions according to the composition and content of the compounds shown in Table 2 below. The liquid crystal compositions of Example 1, Example 2 and Comparative Example 1 were respectively tested according to the following test methods, and the results obtained are summarized in Table 2 below.

[0072] [testing method]

[0073] 1. Clarification point temperature (T ni , ℃): Using a differential scanning calorimeter (DSC) system, place the liquid crystal composition on an aluminum pan and accurately weigh 0.5 to 10 mg. The starting point to determine the phase change temperature. The expression of the phase change is: the crystalline phase is marked as C, the smectic phase is marked as S, the nematic phase is marked as N, and the liquid is marked as I. Among them, the phase transition temperature from the nematic phase to the liquid is ...

Embodiment 3

[0083] The liquid crystal compositions of Example 3 and Comparative Example 2 were mixed at 25° C. according to the composition and content of the compounds in Table 3 below to obtain liquid crystal compositions. The liquid crystal compositions of Example 3 and Comparative Example 2 were respectively tested according to the aforementioned test methods, and the results obtained are summarized in Table 3 below.

[0084] table 3

[0085]

[0086] As can be seen from the results in Table 3, the liquid crystal composition of Example 3 can have a higher T because it contains the compound shown in the chemical formula 2. ni , better Δε, Δn and K 11 , and good low temperature storage.

Embodiment 4、5

[0087] [Example 4, 5 and Comparative Examples 3 and 4]

[0088] The liquid crystal compositions of Examples 4 and 5 and Comparative Examples 3 and 4 were mixed at 25° C. according to the composition and content of the compounds in Table 4 below to obtain liquid crystal compositions. The liquid crystal compositions of Examples 4 and 5 and Comparative Examples 3 and 4 were respectively tested according to the aforementioned testing methods, and the results obtained are summarized in Table 4 below.

[0089] Table 4

[0090]

[0091] Comparing the results of Example 4, Example 5 and Comparative Example 3, it can be found that the Δn of the liquid crystal composition of Comparative Example 3 is low and does not have low-temperature storage properties, which proves that when the liquid crystal composition is not added to the liquid crystal composition shown in Chemical Formula 2 When the compound is used, it will not be able to store at low temperature.

[0092] Comparing the r...

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PUM

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Abstract

The invention relates to a liquid crystal composition containing at least one compound shown in a chemical formula 1, at least one compound shown in a chemical formula 2, and at least one compound shown in a chemical formula 3. The liquid crystal composition is applied in a display unit, has high clear point temperature, good refraction anisotropy, good dielectric anisotropy and good low-temperature storage property and is suitable for requirements of following application. [chemical formula 1] [chemical formula 2] [chemical formula 3] are shown in the description, and ranges of substituent groups in the chemical formulas are shown in the description and the claim.

Description

【Technical field】 [0001] The present invention relates to a liquid crystal composition and a display unit containing the liquid crystal composition, in particular to a liquid crystal composition comprising at least one compound containing a 2,5-benzofuran group and a liquid crystal composition containing the liquid crystal composition Display unit. 【Background technique】 [0002] In order to meet the wide application of liquid crystal display units, various liquid crystal compounds with different structures have been continuously researched and developed. For example, CN 100415730C mentions a benzofuran derivative with the following structure: [0003] [0004] R 11 for C 1 ~C 15 Alkyl or alkenyl, C 1 ~C 15 Alkoxy or alkeneoxy (alkyl alkeneoxy), C 1 -C 15 Fluoroalkyl or fluoroalkenyl; R 12 is H, F, Cl, Br, I, OCF 3 , CN, CF 3 、C 1 ~C 15 Alkyl or alkenyl, C 1 ~C 15 Alkoxy or alkenyloxy, C 1 -C 15 Fluoroalkyl or fluoroalkenyl; n 1 , n 2 and n 3 0~2, but ...

Claims

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Application Information

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IPC IPC(8): C09K19/44G02F1/137
CPCC09K19/44G02F1/137
Inventor 刘信呈李清田王俊智
Owner DAXIN MATERIALS
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