IMAGE STORAGE MEDIUM

摘要

PURPOSE:To store an image which is already outputted and to output the same image repeatedly by composing the image storage medium of a photosensitive layer and an image storage layer. CONSTITUTION:A DC voltage V is applied to transparent electrodes 2 and 8 and the image storage layer 10 is irradiated with light. This light is transmitted through a protection layer 9 and the transparent electrode 8 to reach a photoconductive laye 7 to make the part irradiated with the write light L conductive. The part which is not irradiated with the write light L is still transparent, so an opaque black insulating layer is seen in black as a background when viewed from the opposite side of the irradiation side. Liquid crystal 4 has an image storing function, so an image transferred to and stored in the image storage layer 10 is held even after an electric field is removed. The image is erased only by applying a high-frequency electric field which is more intenser than a threshold value electric field to the phase shift of the cholestic phase and nematic phase of the liquid crystal 4 between the transparent electrodes 2 and 8.