Partial erasable liquid crystal writing film, partial erase method, multi voltage output circuit and positioning system

摘要

Problem to be solved: to provide a partial erasable liquid crystal writing film, a partial erasing method, a multi voltage output circuit and a positioning system capable of storing and reproducing a writing locus while having a high erasing speed and accurately positioning a partial erasing region.Solution: at least one of the first conductive layer and the second conductive layer comprises a sequentially arranged first conductive layer, a liquid crystal layer and a second conductive layer, and a liquid crystal writing film is formed which is divided into two or more mutually isolated conductive regions.By positioning the erase region through the positioning system, and applying a predetermined voltage to the set conductive region on the basis of the positioned erasing region, the voltage forms a predetermined electric field in the erase region and realizes erasing in the erasing region.Partial erasure of the liquid crystal writing film can be realized by utilizing a local electric field formed between the upper and lower conductive layers.Diagram