Electromagnetic driving multi-color display device, display writing device and method for making same

Abstract

The invention discloses multicolor display device, read and write display device by electromagnetic drive and preparation method. Containing microsphere in display layer comprises magnetic field control particle, first and second electric field control particles, all of which can move acted by the electromagnetic field; the color of particles are different to each other; when preparing display material, take surface chemical modification to magnetic field control particle; take surface macromolecule modification to electric field control particles; add electrophoresis particle charge control agent to form tricolor particle suspending liquid; use coater to control dose of aforementioned display material; block and solidify on coating display layer of conducting base material; coat one protection layer on display layer; when reading and writing, use electric field reverse switch to select forward direction, reverse direction and broken control electric field; by control of electric pen and magnetic field pen, show rich colors on read and write display device, and fit to request of large scale preparation and produe.

Description

technical field [0001] The invention relates to a display writing device, in particular to an electromagnetically driven multi-color display device, a display writing device and a manufacturing method thereof. Background technique [0002] Traditional writing devices include blackboards, notebooks, etc. The former needs to use chalk and cause dust to fly, while the latter requires constant replacement of paper. For many years, efforts have been made to develop writing devices that do not require chalk or changing paper. At present, there are several reusable display writing devices on the market, such as the magnetophoretic device used on children's toys, which uses magnetic particles and white particles for comparison. There is a magnet at the tip of the pen, which uses a magnetic field to write. It can be written on a white background. Produces a black pattern. Although simple, this device has several disadvantages, such as: [0003] (1) It is not easy to modify locally...

AI Technical Summary

Problems solved by technology

[0003] (1) It is not easy to modify locally. If there is a writing or painting error, it is necessary to erase the entire picture and start over;

[0004] (2) The color is monotonous and it is difficult to write thin lines. The color is usually only black and white. Although multiple two-color panels can be combined to produce more than three colors, each individual splicing area is still limited to two colors;

[0005] (3) The whole device is thicker and does not have the lightness of paper;

[0006] (4) Large-area devices are difficult to manufacture due to the need to encapsulate the liquid that suspends magnetic particles and white particles

However, it will be very difficult to realize this technology. Not only is it difficult to control the different field-effect mobility of particles, but also because of the certain distribution of particle charge and mobility, there will be mutual intersection, which makes the contrast effect of different colors poor.

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