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Electrophoresis display electronic ink

An electronic ink and electrophoretic display technology, applied in ink, optics, instruments, etc., can solve the problems of affecting display effect and display life, electrophoretic particle sedimentation, electrophoretic effect reduction, etc., to achieve small color particles, low response voltage requirements, Choose from a wide range of effects

Inactive Publication Date: 2012-11-21
BEIJING INSTITUTE OF GRAPHIC COMMUNICATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after many years, electrophoretic displays have not produced a leap forward, because ordinary electrophoretic displays have obvious defects: the electrophoretic particles in the colloid will quickly settle, aggregate or other problems, which will affect the display effect and display life.
Ordinary titanium dioxide suspension has two disadvantages as a display liquid: it can display up to two colors, and the color is monotonous; when the two colors are converted, the titanium dioxide particles must move a sufficient distance under the action of an electric field
Relatively speaking, as the particle size increases, the electrophoretic effect decreases

Method used

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  • Electrophoresis display electronic ink

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Example 1: A mixed solvent of acid dye Acid Red 1 (C.I.Acid Red 1), ethanol and aniline.

[0062] Dissolve acid red dye Acid Red 1 (C.I.Acid Red 1) in a mixed solution of ethanol and aniline (the mass ratio of ethanol and aniline is 3:1) to obtain a mixed solution with a concentration of 0.01mol / L. Acid red dyes belong to azo dyes, and each dye molecule contains 2 sodium sulfonates and one hydroxyl group. Aniline is a weakly basic solvent. In a mixed solvent of ethanol and aniline, the acid red dye particles are negatively charged. Inject this solution into figure 1 In the electrophoresis tank shown.

[0063] The electrophoresis tank is composed of 2 layers of ITO conductive glass. The ITO coating on the glass faces inward, and the thickness between the two pieces of glass is about 1mm. The frame part is sealed with adhesive. The glass surface in front of the viewer is treated with ITO coating only where the image needs to be displayed. The ITO glass located on t...

Embodiment 2

[0065] Embodiment 2: Acid dye Acid Black 1, a mixed solvent of pyridine and ethanol.

[0066] 0.1 g of acid black dye was dissolved in 10 ml of a mixed solvent of pyridine and ethanol, to obtain a mixed solution with a concentration of 10% (w / v) of acid black 1 dye. One molecule of Acid Black 1 dye contains two sodium sulfonate groups, one amino group, one nitro group, and one hydroxyl group. Pyridine is a weakly basic solvent. In pyridine, the acid red dye particles are negatively charged due to solvation. Inject this solution into figure 1 In the electrophoresis tank shown. A 2V voltage is applied between two ITO glass electrodes through a regulated DC power supply. The front electrode of the observer is positive and the back electrode is negative, and the dye undergoes electrophoresis. The image display can be observed. Reverse voltage is applied, and the dye undergoes reverse electrophoresis.

Embodiment 3

[0067] Embodiment 3: Acid dye Acid Black 1, a mixed solvent of triethylamine and tetrachloroethylene.

[0068] 0.1 g of acid black dye was dissolved in 10 ml of a mixed solvent of triethylamine and tetrachloroethylene, to obtain a mixed solution with a concentration of 10% (w / v) acid black 1 dye. One molecule of Acid Black 1 dye contains two sodium sulfonate groups, one amino group, one nitro group, and one hydroxyl group. Triethylamine is a weakly basic solvent. In triethylamine, the acid red dye particles are negatively charged due to solvation. Inject this solution into figure 1 In the electrophoresis tank shown. A 2V voltage is applied between two ITO glass electrodes through a regulated DC power supply. The front electrode of the observer is positive and the back electrode is negative, and the dye undergoes electrophoresis. The image display can be observed. Reverse voltage is applied, and the dye undergoes reverse electrophoresis.

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Abstract

Electrophoretic display electronic ink consists of charge particle and transparent liquid wit stable dissolving function and suspended charge particle. The process is carried out by displaying electronic ink, dissolving and dispersing. The grain size reaches to 40-60 nm, display OD reaches above 3.16, it's not easy to aggregate and deposit. It has good storage performance and can be used for various electronic papers.

Description

technical field [0001] The present invention relates to the technical field of information display such as images and texts, especially the technical field of flexible material display, more precisely, it belongs to the field of electrophoretic display electronic ink, that is, the field of electrophoretic display electronic paper. Background technique [0002] Electronic display device (Electronic display device), is what people often call the man-machine interface (Man-Machine interface). From a functional point of view, electronic display devices can convert electrical signals output by various electronic devices into optical information that can be discerned by human vision. From the discovery of liquid crystal by Austrian Reinitzer in 1888 to the invention of CRT display by German Braun, the development of electronic displays has experienced a history of more than 100 years. Generally speaking, when the optical signal is displayed by light emission, it is called active ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D11/00G02F1/167
Inventor 蒲嘉陵李路海王铭
Owner BEIJING INSTITUTE OF GRAPHIC COMMUNICATION