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Dichromatic dyestuff composition, and liquid crystal composition and liquid crystal element containing the same

一种二色性染料、液晶组合物的技术，应用在有机染料、液晶材料、非线性光学等方向，能够解决有序参数减小、有序参数困难、染料溶解度降低等问题，达到波长色散小的效果

Inactive Publication Date: 2008-08-06
SONY GRP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Dichroic dyes show different absorption characteristics depending on their dye structure; however, dichroic dyes mainly absorb specific wavelengths such as red, blue, and yellow, making it difficult to express black with a single dye
[0008] However, since a single dichroic dye has various characteristics in the prior art in a mixed system of multiple dichroic dyes, it is difficult to reduce the absorbance in a wide wavelength range despite satisfying solubility and dichroism wavelength dispersion
In particular, in the case where the host liquid crystal is a fluorinated liquid crystal composition, the solubility of the dye is significantly reduced
Therefore, it is difficult to develop guest-host liquid crystal compositions with high order parameters using fluorinated liquid crystals
[0009] In JP-A 2000-313881, 2000-17266, 2000-73064 and JP-10-95980, some guest-host liquid crystal compositions with higher order parameters are proposed. Compared with the order parameters in the wavelength range of 400nm to 500nm, the order parameters in the wavelength range of 400nm to 500nm are reduced, and there is no guest-host liquid crystal composition with high order parameters in the entire wavelength range of 400nm to 650nm.

Method used

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  • Dichromatic dyestuff composition, and liquid crystal composition and liquid crystal element containing the same
  • Dichromatic dyestuff composition, and liquid crystal composition and liquid crystal element containing the same
  • Dichromatic dyestuff composition, and liquid crystal composition and liquid crystal element containing the same

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0158] Liquid crystal composition-1 was prepared by dissolving dichroic dye composition-1 having the following composition in 100 g of a fluoride-based n-type liquid crystal compound available from Merck Ltd. of Japan under the name "MLC- 2039" (trade name) was obtained.

[0159]

[0160] [I-1-1]: 0.71g

[0161] [II-1-1]: 0.95g

[0162] [III-1-1]: 1.26g

[0163] [IV-1-1]: 0.79g

[0164] The dye represented by the following structural formula [X]: 0.709g

[0165]

[0166] As a result of evaluating the obtained liquid crystal composition-1 by the above-mentioned solubility measurement, no precipitate was found. Therefore, the solubility of Dye Composition-1 in MLC-2039 is considered to be 4.2% by weight or more.

[0167] A device was produced by the above-mentioned method using the liquid crystal composition-1, thereby measuring a spectrum and determining an order parameter (S value). As a result, as shown in Table 6, good S values ​​were obtained over a wide waveleng...

Embodiment 2

[0169] Liquid crystal composition-2 was prepared by dissolving dichroic dye composition-2 having the following composition in 100 g of a fluoride-based n-type liquid crystal compound available from Merck Ltd. of Japan under the name "MLC- 2039" (trade name) was obtained.

[0170]

[0171] [I-1-1]: 0.91g

[0172] [II-1-1]: 0.91g

[0173] [III-1-1]: 1.26g

[0174] [IV-1-1]: 0.76g

[0175] The dye represented by the following structural formula [X]: 0.68g

[0176]

[0177] The dye represented by the following structural formula [XI]: 0.08g

[0178]

[0179] As a result of evaluating the obtained liquid crystal composition-2 by the above-mentioned solubility measurement, no precipitate was found. Therefore, the solubility of Dye Composition-2 in MLC-2039 is considered to be 4.4% by weight or more.

[0180] A device was produced by the above-mentioned method using the liquid crystal composition-2 to measure the spectrum and determine the order parameter (S value). Th...

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Abstract

The present invention discloses a dichroic dye composition, a black guest-host liquid crystal composition exhibiting a high order parameter using the dichroic dye composition, and a liquid crystal element with high contrast, wherein the solubility of the dichroic dye in the liquid crystal Sufficiently high and small wavelength dispersion of absorbance over a wide wavelength range. The dichroic dye composition comprises at least one dichroic dye selected from group (I) shown above, at least one dichroic dye selected from group (II) shown below, and at least one dichroic dye selected from group (II) shown below At least one dichroic dye from group (III).

Description

[0001] Cross References to Related Applications [0002] The present invention contains subject matter related to Japanese Patent Application JP2007-012840 filed in the Japan Patent Office on Jan. 23, 2007, the entire content of which is hereby incorporated by reference. technical field [0003] The present invention relates to a dichroic dye composition and a guest-host liquid-crystal composition (guest-host liquid-crystal composition) used for liquid crystal elements in display devices, dimming devices, etc., and a liquid crystal element using the guest-host liquid-crystal composition. Background technique [0004] A liquid crystal cell sandwiched between two electrodes has been widely used in display devices such as notebook computers and personal digital assistants (PDAs), dimming devices such as camera viewfinders that can switch the field of view due to its space-saving and light-weight properties. ,wait. Its scope of application has been expanding year by year. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B67/36C09K19/60G02F1/13
CPCC09B67/0055C09K19/601G02F1/13725G02F2202/043C09K2323/00C09K19/00
Inventor 志贺靖田中由纪石田美织田中和洋海部敬太佐野幸广
Owner SONY GRP CORP
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