Colorful electrophoretic display with electric field response photonic crystal characteristics and preparation method and display method thereof

A color electrophoresis, photonic crystal technology, applied in the direction of instruments, optics, nonlinear optics, etc., can solve the problems of difficulty in expressing various colors, low color performance effects, etc., and achieve the effect of preventing agglomeration and sedimentation

Active Publication Date: 2016-06-22
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Electronic ink display has the advantages of high contrast, wide viewing angle, low energy consumption and flexible display. However, the disadvantage of electronic ink lies in its low color performance, that is, it is difficult to express various colors, because the color of the particles has been set. set to a specific color

Method used

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  • Colorful electrophoretic display with electric field response photonic crystal characteristics and preparation method and display method thereof
  • Colorful electrophoretic display with electric field response photonic crystal characteristics and preparation method and display method thereof
  • Colorful electrophoretic display with electric field response photonic crystal characteristics and preparation method and display method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] Step 1: Electrophoresis display particle Fe with a particle size of 150±10nm 3 o 4 SiO 2 Preparation of : First, prepare Fe 3 o 4 Particles, specifically:

[0078] (1) Dissolve 6.36g of trisodium citrate dihydrate in 400mL of ethylene glycol at normal temperature and pressure, stir to obtain a clear solution, which is designated as solution A;

[0079] (2) 16.38g of ferric chloride was dissolved in 200mL of ethylene glycol to obtain a clear solution, which was designated as solution B;

[0080] (3) Add anhydrous sodium acetate (30g) and deionized water (15g) with a mass ratio of 1:0.5 into solution A, stir until completely dissolved to obtain solution C;

[0081] (4) Then add solution B to solution C, stir to make it fully mixed to obtain brown-black clear solution D;

[0082] (5) Place the brownish-black clear solution D in a high-temperature and high-pressure reactor with a volume of 1 L, set the temperature at 200° C., and react at this temperature for 10 h.

[...

Embodiment 2

[0099] Step 1: Electrophoretic display particle SiO with different particle sizes 2 TiO 2 specific preparation process.

[0100] SiO 2 Particle preparation:

[0101] (1) At a temperature of 50°C and a mechanical stirring speed of 400rpm, put 8mL of ammonia water, 5mL of water, and 147mL of absolute ethanol in a 500mL three-necked flask and mix evenly to obtain solution A;

[0102] (2) Pump 7.2mL tetraethyl orthosilicate into solution A with a peristaltic pump, and continue to react for 4 hours to obtain solution B;

[0103] (3) Add 38 mL of absolute ethanol into solution B, and continue stirring for 10 min to obtain solution C.

[0104] Core-shell SiO 2 TiO 2 Particle preparation:

[0105] (1) Take 100mL of the above solution C and place it in a 250mL three-necked flask;

[0106] (2) At a stirring speed of 400rpm, use a peristaltic pump to drop the mixed solution of isopropyl titanate and absolute ethanol into the above-mentioned 100mL solution C (pH=11, T=50°C) at a c...

Embodiment 3

[0114] Step 1: Electrophoresis display particle Fe with a particle size of 170±25nm 3 o 4 The specific preparation process of CFe 3 o 4 The preparation of particle: (same as embodiment 1)

[0115] Fe 3 o 4Preparation of C particles:

[0116] (1) Dissolve 0.3g ferrocene in 30mL acetone at normal temperature and pressure, stir for 1h, and then perform ultrasonic treatment;

[0117] (2) Pump 1 mL of hydrogen peroxide (30%) into the solution with a peristaltic pump, and stir for 2 hours after ultrasonic treatment;

[0118] (3) Place the solution in a high-temperature and high-pressure reactor, set the temperature to 210° C., and react at this temperature for 30 hours;

[0119] (4) After the reaction is completed, the obtained mixed solution is subjected to magnetic separation, and the obtained solid is washed several times with deionized water and absolute ethanol to obtain the prepared sample.

[0120] Fe with different particle sizes can be obtained by adjusting the amou...

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Abstract

The invention discloses a preparation method of a colorful electrophoretic display with the electric field response photonic crystal characteristics. The preparation method comprises the steps of preparation of electrophoretic display particles, preparation of electrophoretic display liquid, preparation of microcapsules and preparation of the display. According to the preparation method, pigment particles are replaced with monodispersed nanoparticles, various color development of the single particles can be achieved under different voltages, and the color development effect is obvious; furthermore, the agglomeration and sedimentation problems of the monodispersed nanoparticles in the preservation process are solved through microencapsulation, the flexible color display effect is achieved by printing or applying the microcapsules to a flexible substrate, and the important application value is achieved.

Description

technical field [0001] The invention relates to the technical field of electrophoretic display, in particular to a color electrophoretic display with electric field response photonic crystal characteristics, a preparation method and a display method thereof. Background technique [0002] Electronic ink display, that is, microencapsulated electrophoretic display technology (Microencapsulated electrophoretic display), was proposed by the Massachusetts Institute of Technology (MIT) Media Laboratory in 1997. It is a new type of non-luminous electrophoretic display (Electrophoretic Display) material technology developed by the multidisciplinary cooperation of physics, chemistry and electronics. It utilizes the principle of electrophoresis in colloid chemistry to stably disperse positively and negatively charged specific pigment (such as black and white) solid particles in a non-aqueous dispersion system containing dyes, so that the dispersed phase and the dispersed medium are in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/167
CPCG02F1/167G02F2001/1678
Inventor 马思孙爱华储成义唐小兵张建飞郭建军许高杰
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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