A digital computer LED writing board of the present invention is mainly based on
the piezo-electric characteristics of a soft film piezo-electric material such as Polyvinyliden Fluoride (PVDF) with a thickness approximately 30 um (even thinner than that of a common paper). A uniquely designed writing board of high resolution constructed of such material together with necessary detection circuits connected to a computer forms a device suitable for writing or drawing the characters or graphs with a common writing instrument (pencil, ball pen) and storing them into a memory or displaying them on a screen, or printing out in their original patterns without any change.