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Micro-packaging structure of electronic ink with fast response and electronic paper

An electronic ink and fast-response technology, applied in nonlinear optics, instruments, optics, etc., can solve problems such as poor stability, low refresh rate, and slow response time

Inactive Publication Date: 2019-03-26
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the stability of electronic ink in traditional electronic paper is poor, and due to the slow movement speed of electrophoretic particles in the electrophoretic system, resulting in low refresh rate and slow response time, it is not suitable for playing animation videos

Method used

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  • Micro-packaging structure of electronic ink with fast response and electronic paper
  • Micro-packaging structure of electronic ink with fast response and electronic paper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Embodiment 1 provides an electronic ink, wherein the electrophoretic particles are two-color electrophoretic particles, specifically, carbon black nanoparticles are used as black electrophoretic particles, titanium dioxide nanoparticles are used as white electrophoretic particles, and the thickener is polyisobutylene (PIB). The charge control agent is monosuccinimide (monosuccinimide, T151), and the liquid crystal material is E7 liquid crystal. Its specific preparation process is as follows:

[0049] Add 7wt% carbon black nanoparticles in a clean round mouth bottle, then add 1wt% PIB thickener, 0.1wt% T151 charge control agent, and finally add an appropriate amount of non-polar solvent to obtain black electronic ink; Yes, add 3wt% titanium dioxide nanoparticles to a clean round bottle, then add 1wt% PIB thickener, 0.1wt% T151 charge control agent, and finally add an appropriate amount of non-polar solvent to obtain white electronic ink;

[0050] Mix the black electroni...

Embodiment 2

[0053] Embodiment 2 provides a kind of preparation method of the microencapsulation structure of microcapsule, specifically comprises the following steps:

[0054] Add 2ml of the electronic ink obtained in Example 1 to 50ml of 2.7wt% gelatin aqueous solution, stir magnetically, and control the magnetic stirring speed to 650r / min until the system generates an emulsion;

[0055] Put the obtained emulsion into a water bath heating box, keep the temperature at 40°C, then add 50ml of 2.5wt% gum arabic aqueous solution into it, and mix and stir;

[0056] Slowly add OTS (octadecyltrichlorosilane) drop by drop, a total of 1ml, and keep stirring;

[0057] Slowly add 100ml of sodium lauryl sulfate aqueous solution dropwise, emulsify for 15min, and adjust the pH value to 3-4 with 0.2mol / L acetic acid aqueous solution, so that the mixed solution produces phase separation;

[0058] Continue to stir for 30 minutes, then cool down to below 5°C in an ice bath, add 5ml of 50wt% glutaraldehyde...

Embodiment 3

[0061] Embodiment 3 provides a kind of preparation method of microcup, specifically comprises the following steps:

[0062] Take 78wt% aromatic acid methyl methacrylate / 3-ethoxy ethyl propionate, 11wt% 1-6-hexanediol diacrylate, 6wt% β-hydroxyethyl methacrylate, 3wt% The polymer leveling agent 836 is evenly mixed with 2wt% photoinitiator 4265, carefully coated on the glass substrate with a wire scraper, and baked on the substrate at 100°C until the coating is air-dried and cured;

[0063] Attach a mask on the coating surface at 10mw / cm 2 Expose for 1h under the ultraviolet exposure lamp of d, remove the mask plate;

[0064] The prepared 1.5wt% sodium carbonate developing solution was developed for 180s while shaking the developing solution and observing;

[0065] The microcup structure obtained after developing is at 10mw / cm 2 After exposure for 10s under the ultraviolet exposure lamp of d, the microcups were obtained by drying.

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Abstract

The invention relates to a micro-packaging structure of electronic ink with fast response and electronic paper. The electronic ink includes a dispersant and a dispersoid dispersed in the dispersant, wherein the dispersoid includes a charge control agent, electrophoretic particles and a material with an anisotropic dielectric constant. The material with the anisotropic dielectric constant, such asa liquid crystal material, is doped in the electronic ink, thereby being capable of making full use of a rotation effect of the material with the anisotropic dielectric constant under the driving of an electric field to cause the flow of a liquid so as to drive the movement of the electrophoretic particles in the electronic ink, thus being capable of improving the response speed of the electrophoretic particles to the electric field, reducing the corresponding time, and improving the sensitivity of display. Furthermore, an alignment material layer, such as a liquid crystal alignment material layer, is introduced to the inner wall of a micro-cavity of a transparent micro-packaging container on the basis of the electronic ink, so that a specific liquid crystal arrangement mode can be formed,the corresponding performance is further improved, and the stability of the ink is improved.

Description

technical field [0001] The invention relates to the field of electrophoretic electronic paper display, in particular to a microencapsulation structure of fast-response electronic ink. Background technique [0002] As a traditional carrier of information, paper has the advantages of conforming to human visual physiological habits, reading without viewing angle restrictions, and cheap price. However, its manufacturing process needs to consume a lot of natural resources including water, and the printing cycle is long, information update is slow, and the transmission speed limited. Although traditional liquid crystal electronic displays have fast information transmission and high contrast, their display screens are fragile and require a backlight source to illuminate the displayed image, which consumes a relatively large amount of power. Electronic paper has the advantages of both paper and liquid crystal electronic displays. It not only conforms to people's visual habits, but ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/167G02F1/16757
CPCG02F1/167G02F2001/1678
Inventor 杨柏儒张雅帝龚又又
Owner SUN YAT SEN UNIV