Electrophoretic display

Abstract

The invention provides an electrophoretic display with a color displaying effect. The electrophoretic display sequentially comprises a transparent front plate, an electrophoretic displaying layer anda back plate from outside to inside; and the transparent front plate and the back plate are connected through a circuit to apply electric signals to the two ends of the electrophoretic displaying layer. The electrophoretic display is characterized in that excitation light sources are further arranged on the peripheral sides of the transparent front plate and the electrophoretic displaying layer and used for irradiating excitation light to the electrophoretic displaying layer; the electrophoretic displaying layer is internally provided with electrophoretic liquid and one or more types of chromotropic electrophoretic particles dispersed in the electrophoretic liquid; the chromotropic electrophoretic particles comprise an excited state and an unexcited state, and under excitation of the excitation light sources, the chromotropic electrophoretic particles are in the excited state and display the color different from that of the unexcited state; and a protective layer is further arranged onthe outer side of the transparent front plate, and the light transmittance of the protective layer to the excitation light sources is smaller than 20%. The electrophoretic display has the good colordisplaying effect.

Description

technical field [0001] The invention belongs to the technical field of display devices, in particular to an electrophoretic display. Background technique [0002] It has the advantages of high contrast, wide viewing angle, low power consumption and bistable state. Its display effect is like ordinary paper, which makes people read comfortably, and it can switch and refresh to display new content like a common liquid crystal display. Because the use of electrophoretic display reduces the felling of wood and is conducive to the realization of green ecology, it is sought after by people. However, currently existing electronic paper display devices can basically only display black and white, which greatly limits their application. Some e-paper devices can display three colors, but because of the low color saturation and brightness of the reflective display, its application is greatly limited. In order to solve the problem of color display, researchers have adopted methods such...

AI Technical Summary

Problems solved by technology

Add a color filter film, when displaying white, because the filter film will absorb part of the transmitted light, thereby reducing the overall reflectivity of the display; when displaying in color, the saturation of the color is insufficient

Multi-color particle display, due to the increase of particle types and the complexity of the electrophoretic system, problems such as dye precipitation, slow response speed, decreased contrast, and poor particle stability will occur in this method, which will seriously affect the display effect

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