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Bistable magnetic display panel and manufacturing method thereof

A manufacturing method and display panel technology, applied to reusable writing boards, printing, instruments, etc., can solve the problems of limiting the application range of magnetic display panels, reducing display resolution, and low packaging efficiency

Inactive Publication Date: 2009-12-23
湖北微颖科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above-mentioned magnetic display panels can achieve the effect of displaying under magnetic conditions, the above-mentioned magnetic display panels containing small cells have relatively large length and width, which greatly reduces the resolution of the display, and the thickness of the displayed lines cannot be adjusted. Reach the level of ordinary writing pens, which limits the application range of magnetic display panels
Although the above-mentioned magnetic display board containing microcapsules can meet the requirements of ordinary writing in terms of resolution, in order to prevent the sedimentation of magnetic particles and white particles and improve the image stabilization time, adding a microparticle thickener to the dispersion will make the magnetic The particles and white particles are adsorbed and aggregated on the surface of the particle thickener. Under the action of an external magnetic field, the magnetic particles and white particles move together, which reduces the contrast. In order to achieve the required anti-settling effect, it is necessary to add a sufficient amount of particle thickener. It will increase the viscosity of the dispersion liquid, hinder the movement of the magnetic particles, and cause the response time to be prolonged. In addition, under the condition that the magnetic particles and white particles are fully dispersed, even if the fine particle thickener is added, the sedimentation and stratification of the particles cannot be completely eliminated. The stable time is not long, that is, there is no bistability
Therefore, the existing magnetic display panels cannot fully meet the requirements of practical applications in terms of resolution, contrast, response time and stability of displayed images.
The existing manufacturing method of microcapsule magnetic display panel, as the method disclosed in the patent CN95115366.8 disclosed by the Patent Office of the State Intellectual Property Office of China, is to adopt the gelatin-gum acacia complex coacervation method to manufacture microcapsules. On the one hand, the microcapsule material gelatin and Gum Arabic is a natural polymer material with limited sources, relatively high price, and will gradually decompose. On the other hand, complex coacervation process has complicated process steps, strict process parameters, microcapsules are prone to aggregation, and the encapsulation efficiency is not high. In industry, economies of scale create disadvantages

Method used

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  • Bistable magnetic display panel and manufacturing method thereof
  • Bistable magnetic display panel and manufacturing method thereof
  • Bistable magnetic display panel and manufacturing method thereof

Examples

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Effect test

Embodiment 1

[0039] Add 0.2g of sodium lactate into 30g of ethylene glycol and stir to dissolve, then add 4.0g of Fe 3 o 4 Stir and disperse for 30 minutes to obtain mixture A, 10gTiO 2 Add 20 g of ethylene glycol and stir to disperse for 30 minutes, then add 0.1 g of a 30% aqueous solution of sodium polyacrylate with an average molecular weight of 8,000, continue to stir and disperse for 30 minutes to obtain mixture B, mix mixture A and mixture B for 10 minutes to obtain mixture C, and Add 0.8 g of diethylenetriamine to mixture C and stir to obtain mixture D. Add 20g of chlorinated polypropylene into 80g of xylene and stir until completely dissolved to obtain mixture E, add 30g of mixture D into mixture E and slowly stir until the average diameter of dispersed droplets is 80 microns, start to drop 50% xylene solution of toluene diisocyanate 1g, added dropwise within 20 seconds, after 10 minutes of reaction, keep the stirring speed constant, slowly add the remaining mixture D to the mixt...

Embodiment 2

[0045] Add 0.3g of sodium citrate into the mixed dispersion of 15g of ethylene glycol and 15g of deionized water and stir to dissolve, then add 3g of Fe 3 o 4 Stir and disperse for 30 minutes to obtain mixture A, 8.0g TiO 2Add 10 g of ethylene glycol and 10 g of deionized water to the mixed dispersion and stir for 30 minutes to disperse, then add 0.2 g of an aqueous solution of 20% acrylic acid-methyl acrylate copolymer sodium salt (acrylic acid content 40%) with an average molecular weight of 32,000, and continue to stir and disperse for 30 minutes To obtain mixture B, mix mixture A and mixture B and stir for 10 minutes to obtain mixture C, add 0.4 g of triethylenetetramine to mixture C and stir to obtain mixture D. Add 20g of methyl methacrylate-butyl acrylate copolymer into 80g of xylene and stir until completely dissolved to obtain mixture E, add 30g of mixture D into mixture E and slowly stir until the average diameter of dispersed droplets is 100 microns, and start to a...

Embodiment 4

[0049] Add 0.3g of sodium citrate into the mixed dispersion of 15g of ethylene glycol and 15g of deionized water and stir to dissolve, then add 3g of Fe 3 o 4 Stir and disperse for 30 minutes to obtain mixture A, 8.0g TiO 2 Add 10 g of ethylene glycol and 10 g of deionized water to the mixed dispersion and stir for 30 minutes to disperse, then add 0.2 g of an aqueous solution of 20% acrylic acid-methyl acrylate copolymer sodium salt (acrylic acid content 40%) with an average molecular weight of 32,000, and continue to stir and disperse for 30 minutes To obtain mixture B, mix mixture A and mixture B and stir for 10 minutes to obtain mixture C, add 0.4 g of triethylenetetramine to mixture C and stir to obtain mixture D. Add 20g of methyl methacrylate-butyl acrylate copolymer into 80g of xylene and stir until completely dissolved to obtain mixture E, add 10g of mixture D into mixture E and slowly stir until the average diameter of dispersed droplets is 100 microns, and the rest ...

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Abstract

The invention discloses a bistable magnetic display panel and a manufacturing method thereof, wherein the bistable display panel comprises a transparent substrate, a microcapsule and a bonding agent which bonds the substrate and the microcapsule. The microcapsule is internally provided with dispersing liquid, magnetic particles and white particles; and the magnetic particles and the white particles are all processed through surface modification and are a controllable flocculation state in the dispersing liquid so as to form a three-dimensional network. The bistable magnetic display panel has high resolution, contrast and response speed and stable display image.

Description

technical field [0001] The invention relates to a magnetic display panel, in particular to a bistable magnetic display panel. Background technique [0002] The existing magnetic display panel is to encapsulate a mixture of dispersion liquid, magnetic particles and white particles in a small chamber that is closely arranged in two dimensions. Under the action of an external magnetic field, the display and erasure of images are realized by controlling the up and down movement of the magnetic particles. functions, such as patents CN03119407.9, CN90104814.3, and CN97116111.9 published by the Patent Office of the State Intellectual Property Office of China, the contents of which are hereby incorporated by reference. In addition, a microcapsule magnetic display panel is disclosed, which is manufactured by encapsulating a mixture of dispersion liquid, magnetic particles, white particles and a microparticle thickener in an aqueous medium to form microcapsules through the gelatin-gum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09F9/37B43L1/00
Inventor 柯剑
Owner 湖北微颖科技有限公司
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