Yellow dye, ink and electrowetting display

An electrowetting display and yellow dye technology, applied in ink, instrument, optics, etc., can solve the problems of low color development intensity and low polarity, and achieve the effect of ultra-high color development intensity, high saturation and bright colors

Active Publication Date: 2017-11-17
SHENZHEN GUOHUA OPTOELECTRONICS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patents WO 2003 / 071346, WO 2010 / 031860, US 2011 / 0226998, and US 20130241815 have all protected ink materials based on anthraquinone structure. The advantages of anthraquinone structure ink materials for electrowetting display are Its polarity is low, and most of the dyes have excellent light fastness, but its disadvantage is that the color intensity is low

Method used

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  • Yellow dye, ink and electrowetting display
  • Yellow dye, ink and electrowetting display
  • Yellow dye, ink and electrowetting display

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] according to figure 1 The synthetic scheme shown is for the preparation of the dye:

[0024] Weigh 6.6g (132g / mol, 0.05mol) of tert-butoxycarbonylhydrazine and dissolve it in 50mL of n-hexane, weigh 6.7g (114g / mol, 0.058mol) of isooctylaldehyde and slowly add it dropwise to the above solution, heat up to reflux reaction 2h. After the reaction was completed, the solvent was evaporated to dryness to obtain compound 1 with a yield of 100%.

[0025] Cool compound 1 to 0-5°C, weigh 100 mL of 1 mol / L borane tetrahydrofuran solution and slowly add it dropwise to the above reaction device, the developer is dichloromethane / petroleum ether = 1:1, and react for 2 hours to obtain compound 2. Measure 15mL of concentrated hydrochloric acid, slowly add it dropwise to the above solution, heat to reflux after no obvious bubbles, and react for 0.5h. After the reaction was completed, it was cooled, and the precipitated boric acid was removed by suction filtration, and the solution was ...

Embodiment 2

[0032] Adopt synthetic method same synthetic method as embodiment 1 compound B, its structural formula is:

[0033]

[0034] Using nuclear magnetic spectrum analysis, its hydrogen nuclear magnetic spectrum data are: 1 H NMR (CDCl 3 ): 11.763(s,1H), 7.536-7.51(d,2H), 7.313-7.304(d,4H), 6.884(s,2H), 3.941(t,2H), 3.687(d,3H), 2.505( t,3H), 1.851-1.258(m,30H), 0.967(m,15H). Spectral data demonstrated the correct structure.

[0035] The yellow dye prepared in this example has good light stability and high solubility, and can be dissolved in an organic solvent to prepare an ink. Especially in non-polar organic solvents, such as n-decane, n-dodecane, n-tetradecane, n-hexadecane, fluorine-containing alkanes, silane, etc., the dye has a very high solubility, and the dye can be dissolved In a non-polar organic solvent, the ink prepared is bright in color, high in saturation, and super high in color development strength, which is very suitable for electrowetting display.

Embodiment 3

[0037] Weigh 0.1 g of the dyes prepared in Example 1-2, dissolve them in 10 mL of n-dodecane, and prepare electrowetting display inks I and II respectively. The color, maximum absorption wavelength (λmax), solubility C at 25° C., molar absorptivity ε and ε·C of the prepared ink material are shown in Table 1.

[0038] Table 1 Ink material performance results

[0039] sample

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Abstract

The invention discloses a yellow dye, an ink and an electrowetting display. The dye adopts an azo group and a carbon-nitrogen double bond to build a chromogenic body structure, and avoids the usage of 4-aminoazobenzene in the structure of a yellow electrowetting organic dye in current patents, the original spectrum properties of the yellow organic dye are retained, and at the same the yellow organic dye is greener and safer; the yellow dye disclosed in the invention has a higher molar absorptivity and higher solubility, especially the solubility in a non-polar solvent is relatively high, when the yellow dye is dissolved in the non-polar solvent, the obtained ink is bright in color, high in saturation degree, and ultra-high in coloring intensity, and when the electrowetting display is filled with the ink, the electrowetting display has relatively-low switching response time, and no flow-back phenomena under a constant voltage; and the ink prepared from the dye provided in the invention is very suitable for electrowetting display.

Description

technical field [0001] The invention relates to the field of electrowetting displays, in particular to a yellow dye, ink and an electrowetting display. Background technique [0002] Electrowetting display technology (EFD, Electrofluide display), also known as electrowetting display technology, is a display prototype based on the principle of electrowetting display first developed by Philips of the Netherlands in 2003. The display principle is to control the surface properties of the hydrophobic layer by changing the voltage, and change the contact angle of the ink layer on the hydrophobic layer: when no voltage is applied, the ink wets the insulating layer evenly to form a colored pixel; when the voltage is applied, The effect of the electric field changes the surface properties of the hydrophobic layer to change the interfacial tension between the three phases of ink-polar liquid-hydrophobic layer, and the ink is compressed to form transparent or substrate-colored pixels, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B43/11C09D11/328G02B26/00
CPCC09B43/11C09D11/328G02B26/005
Inventor 周国富邓勇叶德超周蕤唐彪郭媛媛李楠
Owner SHENZHEN GUOHUA OPTOELECTRONICS
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