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>> Power-saving large-scale LCD electronic paper display technology into IoT applications 3rd,July,2017
Electronic paper display with power saving advantages, which makes it with the LCD (LCD) display a considerable difference. Even e-book reader is still the main application of electronic paper technology products, but in recent years to the technology-based electronic shelf labels, luggage electronic labels, electronic billboards, etc., has gradually become the growth of electronic paper display Kinetic energy source. The electronic paper's power-saving features, is its entry into the Internet of things the largest cost.
In terms of technology, electronic paper technology can be divided into two kinds, one is microcapsule electronic ink technology, which has been widely used in e-reader. The microcapsules of this technique are mixed with white particles containing positively charged white particles and negatively charged black particles, which are suspended in a clean liquid, and then the positive or negative electric field is turned on according to the contents of the user, Of the particles will move to the top of the microcapsules, the user can see the white or black images on the surface.
If the action of the electric field in the opposite direction, then the display is also the opposite, that is, black display, white hidden. Change the direction of the electric field will be able to switch between the display of black and white. The white part corresponds to the unprinted part of the paper, while the black corresponds to the printed graphic part of the paper, using this principle, can directly to the external light source to achieve reflective light (Reflective Display). But the LCD is different, which is mainly the use of backlight module projection light source, the light source through the surface of the color filter and polarizer, direct observation of the eyes of the viewer to produce images.
Another technology is micro-cup technology, the operating principle similar to microcapsule technology, but the structure is different from the microcapsules, the technology has been widely used in electronic shelf labels, in addition to black and white, but also added a red or yellow.
Figure 1 micro-cup technology is very suitable for electronic tape applications
It consists mainly of millions of micro-cups, each containing a positively charged white particles, negatively charged black and red or yellow particles, suspended in a transparent liquid, when applied with positive and negative voltage, The repulsive particles will move to the top of the micro-cup, forming a multicolor composite image.
As the electronic paper in the production, is to use a thin film to do rolling, after the output is rolled, and then cut, so the amount of its output can be very large. Also due to the electronic paper film can not do any drive, you must then paste a thin film transistor (TFT) to the voltage, and drive the small particles in the film to produce images. The TFT backplane, can be soft, it can be hard, such as glass, but the soft backplane is still technically difficult, yet to be overcome.
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