LCD handwriting device

Abstract

The invention discloses a liquid crystal handwriting device which comprises sequentially setting a first base layer, a first conductive layer, a mixed layer, a second conductive layer, a second base layer and a substrate, wherein the mixed layer includes a cholesteric phase liquid crystal and a polymer structure mixture, and an optical rotator for controlling the helical pitch of the cholesteric phase liquid crystal, the cholesteric phase liquid crystal has a first stable state formed at the moment of energization and a second stable state formed at the moment of pressure; when the cholesteric phase liquid crystal is in the first In a steady state, the visible light incident on the cholesteric liquid crystal is in a white scattering state; when the cholesteric liquid crystal is in a second stable state, the visible light incident on the cholesteric liquid crystal is in a transmissive state, and the visible light sequentially passes through The first matrix layer, the first conductive layer, the cholesteric liquid crystal, the second conductive layer and the second matrix layer are incident on the substrate. The invention provides smart paper that can be written without ink, and the font display has the eye-catching effect of black and white characters.

Description

technical field [0001] The invention relates to the field of liquid crystal technology, in particular to a liquid crystal handwriting device. Background technique [0002] As we all know, in the field of liquid crystal displays, bistable liquid crystal displays have gradually become mainstream due to their extremely low power consumption. After the bistable display displays the text or image, it can keep the text or image for a long time without the support of energy until it is switched to the next content, so the energy consumed for long-term display is greatly saved. [0003] The liquid crystal in the traditional bistable liquid crystal display usually adopts smectic A phase liquid crystal, and the smectic A phase liquid crystal presents a transmission state to visible light when the liquid crystal is powered on and restored; after the user writes, the liquid crystal at the writing note is opposite Visible light presents a reflective state, thereby realizing writing. Ho...

AI Technical Summary

Problems solved by technology

However, because the liquid crystal display device presents white characters on a black background, it is contrary to the normal writing habits of users (the habit of using colored pens or black pens to write on white paper), so it is not convenient for users to use; and most of the existing walls use white backgrounds. , and therefore display poorly

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