Liquid crystal writing film local erasing voltage loading control method

Abstract

The invention discloses a liquid crystal writing film local erasing voltage loading control method. The method comprises the steps: increasing the voltage of a set conductive area on a first conductive layer to a first auxiliary voltage A; increasing the voltage of a set conductive region on the second conductive layer to a second auxiliary voltage B; adjusting the voltage of the conductive regioncovering the local erasure region on the first conductive layer to be C, and adjusting the voltage of the conductive region covering the local erasure region on the second conductive layer to be D; enabling the voltage difference between the conductive regions covering the local erasure regions on the two conductive layers to form an erasure electric field, wherein the electric field formed by the voltage difference between the two conductive layers outside the local erasure regions cannot cause the liquid crystal indentation to visually become shallow or disappear. Through a step-by-step voltage boosting and step-by-step voltage reducing mode, the influence of the capacitance effect of the liquid crystal writing film is reduced, meanwhile, the requirements for the quality and the machining precision of the liquid crystal writing film are reduced, and the yield of the liquid crystal writing film is increased.

Description

technical field [0001] The invention relates to the technical field of liquid crystal film structure, in particular to a method for controlling local erasing voltage loading of a liquid crystal writing film. Background technique [0002] The working principle of the liquid crystal writing film currently on the market is to use the bistable characteristics of liquid crystals to display and / or erase the written content on the liquid crystal writing board. For example, using cholesteric liquid crystal as a writing film, the writing pressure track of the writing pen is recorded by the pressure acting on the liquid crystal writing board, and then the corresponding writing content is displayed; the structure of the cholesteric liquid crystal is changed by applying an electric field, so that the liquid crystal The writing pressure track on the tablet disappears to enable erasing. [0003] The liquid crystal writing film partial erasing voltage control method disclosed in the prior...

AI Technical Summary

Problems solved by technology

This puts forward high requirements on the quality and processing accuracy of the liquid crystal writing film. If the liquid crystal thickness of the produced liquid crystal writing film is too high or the thickness of the coating glue is too high or uneven, it will cause the liquid crystal writing film to die due to excessive capacitance. Affect the partial erasing effect, which reduces the yield of liquid crystal writing film to a certain extent

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