Wide-viewing-angle bistable liquid crystal erasable display device and display method thereof

Abstract

The invention provides a wide-viewing-angle bistable liquid crystal erasable display device and a display method thereof. The display device comprises a first substrate layer, a first conductive layer, a first orientation layer, a mixed layer, a second orientation layer, a second conductive layer and a second substrate layer, wherein the mixed layer comprises 10-100% of a cholesteric phase liquid crystal and 90-0% of a polymer, the cholesteric phase liquid crystal is obtained by cholesteric phase liquid crystal molecules with optical activity or obtained by adding a chiral agent into nematic phase liquid crystal molecules, the cholesteric phase liquid crystal or the nematic liquid crystal is a negative liquid crystal, the first orientation layer or the second orientation layer adopts a vertical orientation mode, a voltage is applied between the first conductive layer and the second conductive layer, or part of or all positions of the first substrate layer or the second substrate layer are heated or illuminated, and the cholesteric phase liquid crystal in the mixed layer corresponding to the positions can be switched between a multi-domain planar texture and a focal cone texture.

Description

technical field [0001] The invention relates to a bistable liquid crystal rewritable display device with a wide viewing angle and a display method thereof, belonging to the field of liquid crystal display. Background technique [0002] At present, the commonly used bistable liquid crystal display device adopts the bistable cholesteric liquid crystal display technology. The bistable cholesteric liquid crystal display has the advantages of light weight, zero field stability, no backlight source, and low power consumption. It is widely used in various mobile terminals, e-books or other small-size display products. [0003] The current bistable cholesteric liquid crystal display uses the action of an external electric field to realize the transition between the two states of planar texture (P state) and focal conic texture (FC state), and has bistable characteristics. It specifically includes: an upper substrate, a lower substrate, a first conductive film and a first alignment ...

AI Technical Summary

Problems solved by technology

Since the bistable state utilizes the Bragg reflection of the P state, resulting in different reflection wavelengths at different incident angles, a small viewing angle and poor viewing angle characteristics

Moreover, the switching between the above bistable states can only be realized by applying an external electric field. In order to realize the writing, displaying and erasing of the specified position and specified information content, a pixelated electrode structure must be used, which increases the cost of the device.

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