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Liquid crystal composition, liquid crystal displaying element and liquid crystal display

A technology for liquid crystal compositions and compounds, applied in the directions of liquid crystal materials, instruments, chemical instruments and methods, etc., can solve the problems of poor contrast, the destruction of the refractive index driving electric field balance of liquid crystal display elements, difficulties and the like

Inactive Publication Date: 2015-08-05
DIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the drop amount deviates greatly from the optimum value, the pre-designed refractive index of the liquid crystal display element and the balance of the driving electric field will be destroyed, and display defects such as mottling and poor contrast will occur.
Especially for the small liquid crystal display elements commonly used in the recently popular smartphones, since the optimum liquid crystal dripping amount is small, it is difficult to control the deviation of the dripping amount from the optimum value within a certain range.

Method used

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  • Liquid crystal composition, liquid crystal displaying element and liquid crystal display
  • Liquid crystal composition, liquid crystal displaying element and liquid crystal display
  • Liquid crystal composition, liquid crystal displaying element and liquid crystal display

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0307] The types of compounds that can be combined are not particularly limited, and various compounds represented by the aforementioned general formula (I-4) can be combined according to the required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. . The type of compound to be used is, for example, one embodiment of the present invention. Or, in another embodiment of this invention, it is 2 types.

[0308] In the liquid crystal composition of the present invention, the content of the compound represented by the general formula (I-4) needs to be determined according to the solubility at low temperature, transition temperature, electrical reliability, birefringence, process adaptability, drop marks, burn-in , Dielectric constant anisotropy and other required properties are properly adjusted.

[0309] For example, as one embodiment of this invention, content of the said compound is 3-50 mass % with respect to ...

Embodiment 1～2、 comparative example 1～2

[1198] A composition using a compound represented by the chemical formula shown below was prepared, and its physical properties were measured. The results are shown in Table 1.

[1199] [chem 180]

[1200]

[1201] [Table 1]

[1202]

[1203] The numerical value of each formula in Table 1 shows the ratio (unit: mass %) of each compound contained in each composition.

[1204] Table 2 shows initial VHR, VHR after heating (150° C., 1 hour), burn-in evaluation, and process suitability evaluation of the liquid crystal compositions of Examples 1-2 and Comparative Examples 1-2.

[1205] [Table 2]

[1206]

[1207] process adaptability

Embodiment 1

[1208] Example 1 has a composition in which 0.3 parts by weight of the compound represented by the formula (i-c-2) is added to 100 parts by weight of the liquid crystal composition of Comparative Example 1. The addition of the compound represented by the formula (i-c-2) did not affect the physical properties of Tni, Δn, Δε, and η. That is, the aforementioned physical properties of Example 1 are the same as those of Comparative Example 1.

[1209] The liquid crystal composition of Example 1 was excellent in burn-in evaluation and process suitability.

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Abstract

The invention relates to a liquid crystal composition. The liquid crystal composition comprises any one, or two, or more chemical compounds shown in the following general formula (i), and comprises any one, or two, or more chemical compounds shown in the following general formula (ii), wherein in the following formulas, Ri1 expresses an alkyl group having 1 to 8 carbon atoms; Ai1 expresses 1,4-cyclohexylene, 1,4-phenylene or a single bond; Rii1 expresses an alkyl group having 1 to 8 carbon atoms; Rii2 expresses an alkyl group having 1 to 8 carbon atoms; Aii1 and Aii2 respectively and independently express 1,4-cyclohexylene and 1,4-phenylene; Zii1 and Zii2 respectively and independently express a single bond, -CH2CH2-, -(CH2)4-, -OCH2-, -CH2O-, -OCF2-, -CF2O-, -COO-, -OCO-, or -C(triple bond)C-; mii1 and mii2 respectively and independently express 0, 1, 2, or 3; mii1+mii2 are 1, 2, 3 or 4; when a plurality of Aii1s and a plurality of Zii1s exist, all the Aii1s can be the same and can also be different, so can all the Zii1s; and when a plurality of Aii2s and a plurality of Zii2s exist, all the Aii2s can be the same and can also be different, so can all the Zii2s.

Description

[0001] This application is a divisional application of the Chinese patent application with the filing date of the original application on March 25, 2013, the application number 201380009592.7, and the invention title "Liquid Crystal Composition, Liquid Crystal Display Element, and Liquid Crystal Display". technical field [0002] The present invention relates to a nematic liquid crystal composition having a positive or negative dielectric constant anisotropy (Δε) useful as a liquid crystal display material, a liquid crystal display element and a liquid crystal display using the nematic liquid crystal composition. Background technique [0003] Liquid crystal display components have developed from clocks and electronic calculators to various measuring instruments, automotive panels, word processors, electronic notepads, printers, computers, televisions, clocks, advertising display boards, etc. Representative liquid crystal display methods include TN (Twisted Nematic) type, STN ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/44G02F1/1333
Inventor 河村丞治根岸真岩下芳典
Owner DIC CORP
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