Full-color cholesteric liquid crystal electronic paper

Abstract

The invention provides full-color cholesteric liquid crystal electronic paper. The full-color cholesteric liquid crystal electronic paper comprises three liquid crystal boxes formed by vertically overlapping four layers of substrates, cholesteric liquid crystal layers capable of reflecting red, green and blue light, and a light shield layer for shielding the light leakage of a non-display area so as to obviate the negative influences of the light leakage of the non-display area on the contrast and the brightness of the display area, wherein the cholesteric liquid crystal layers are respectively packaged in the three liquid crystal boxes; a substrate electrode adopting the combination of a metal electrode and a transparent electrode can reduce the lead resistance; and a light absorption layer is built in the electronic paper to ensure that the incident light from the substrate electrode can be absorbed completely by the light absorption layer. On the premise of saving the cost and reducing the thickness, the full-color cholesteric liquid crystal electronic paper provided by the invention can achieve high-contrast and high-brightness display by increasing the transmittance and reducing the reflectance, and can obviate the poor display effect caused by the external mechanical force. The invention provides an excellent structure support for the large-size manufacture of the full-color liquid crystal electronic paper and the improvement on the display performance of the full-color cholesteric liquid crystal electronic paper.

Description

technical field [0001] The invention relates to an electronic paper, in particular to a full-color cholesteric liquid crystal electronic paper. Background technique [0002] Since single / dual-color electronic paper cannot display color images, its application has limitations. At present, full-color electronic paper technology is the research and development direction of many manufacturers. [0003] Cholesteric liquid crystal electronic paper is considered to be the most important electronic paper production technology in the next decade due to its advantages of low power consumption, fast response speed, and low production cost, especially its technical advantages in color display. [0004] Full-color cholesteric liquid crystal electronic paper adopts stacked display to achieve full-color display. The principle of this technical scheme is as follows: cholesteric liquid crystal material has unique light reflection selective characteristics, and the ratio of cholesteric liquid...

AI Technical Summary

Problems solved by technology

[0007] The disadvantages are: multi-layer substrates are used, and the cost is high; the substrate electrodes of the prior art all use ITO transparent electrodes, the thinner the ITO transparent electrodes, the larger the square resistance, the lower the reflectivity, the higher the transmittance, the display contrast and The higher the brightness, in order to obtain higher display contrast and brightness, it is necessary to use a thinner ITO film, but the square resistance of the electrode will increase, which will increase the lead resistance. When the resolution of cholesteric liquid crystal electronic paper increases Or when the display area increases, it will be difficult to meet the driving requirements due to the excessive lead resistance

Therefore, when the display size of cholesteric liquid crystal electronic paper in the prior art is more than 10 inches, the contrast will be significantly reduced; the contrast is easily affected by mechanical external force or stray light crosstalk

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