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Electrophoretic display microcapsule and its manufacturing method

An electrophoresis display and microcapsule technology, applied in microcapsule preparation, microsphere preparation, optics, etc., can solve problems such as scratch resistance and flexibility, and achieve the effect of expanding applicability, changing surface properties, and reducing sensitivity

Active Publication Date: 2014-12-03
广州奥熠电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a microcapsule for electrophoretic display and its preparation method. The microcapsule prepared by this method has a double-layer capsule wall with certain flexibility and chemical stability, thereby improving the existing single-layer capsule wall. Problems such as scratch resistance or poor flexibility caused by the microcapsule wall

Method used

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  • Electrophoretic display microcapsule and its manufacturing method

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preparation example Construction

[0019] The invention provides a method for preparing double-layer microcapsules that can be used for electrophoretic display, and provides a double-layer capsule wall with certain flexibility and chemical stability to improve the scratch resistance or scratch resistance caused by the current single-layer microcapsule wall. Poor flexibility and other issues.

[0020] refer to figure 1 , the invention provides a method for preparing microcapsules for electrophoretic display, which comprises the following steps:

[0021] S01. Preparation of single-layer microcapsules: adding an electrophoretic suspension dispersed with electrophoretic particles into the dissolved gelatin aqueous solution, and stirring to obtain the first emulsion, wherein the weight ratio of the electrophoretic suspension to gelatin is 1 to 30:1; when When the particle size reaches 20-100um, add gum arabic aqueous solution, then add acid, adjust the pH value in the range of 3.5-5.5, wherein the weight ratio of g...

Embodiment approach

[0025] As an embodiment of the present invention, the electrophoretic suspension used in the present invention includes:

[0026] 2-50 parts by weight of charged pigment particles, the charged pigment particles are only positively charged or only negatively charged;

[0027] The number of parts by weight is 2-50 neutral pigment particles having different optical properties from the charged pigment particles, one of the charged pigment particles and the neutral pigment particles is white;

[0028] 20-70 parts by weight of low-polar and / or non-polar dispersing solvents, in which the above three particles are uniformly dispersed; specifically, the low-polar dispersing solvents are aromatic hydrocarbons or halogenated hydrocarbons; non-polar dispersing The solvent is linear, branched and cyclic aliphatic hydrocarbons or halogenated hydrocarbons.

[0029] A thickening and stabilizing agent of 0.1-10 parts by weight can also be added to the electrophoretic suspension; preferably, ...

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Abstract

The invention discloses a microcapsule for electrophoretic display. The microcapsule includes an electrophoretic suspension and electrophoretic particles dispersed in the electrophoretic suspension, and a capsule wall wrapping the electrophoretic suspension, the capsule wall includes an inner-layer capsule wall and an outer-layer capsule wall, wherein the inner-layer capsule wall is the capsule wall formed by complex coacervation method, and the outer-layer capsule wall is the capsule wall formed by in-situ polymerization method. The invention also provides the manufacturing method of the microcapsule. The microcapsule has double-layer capsule wall having a certain flexibility and chemical stability, to improve the problems of scraping intolerance or poor flexibility of prior single-layer microcapsule wall.

Description

technical field [0001] The invention relates to the technical field of electrophoretic display, in particular to a preparation method of microcapsules for electrophoretic display. Background technique [0002] Electrophoretic display (electrophoretic display) is a reflective display device, and its working principle is based on the electrophoretic phenomenon of charged particles suspended in a non-aqueous solvent. The earliest electrophoretic display product is the twisted spherical electrophoretic display invented by Nicholas K. Sheridan, a researcher at the Palo-Alto Center of Xerox in 1974. The purpose of its research and development is to solve the problems of insufficient brightness and poor contrast used in CRT displays. The advantage of the twisted spherical EPD is that it has good bistability, once imaged, the image will remain in the state when the electric field is removed. But there are also serious problems: some two-color balls cannot be rotated accurately so ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J13/10B01J13/18G02F1/167
Inventor 管静李炜罡张磊
Owner 广州奥熠电子科技有限公司