DISPLAY MEDIUM REWRITING DEVICE, DISPLAY DEVICE, DISPLAY MEDIUM REWRITING METHOD, AND DISPLAY REWRITING PROGRAM

摘要

The purpose of the present invention is to conveniently and safely display an image through an image medium and erase the image therefrom. A rewriting device (14) is equipped with electronic paper (12) and an IC card (16). As a result, information is written to the electronic paper (12) and if, in that state, the IC card (16) is removed, the image displayed on the electronic paper (12) is retained until predetermined conditions are satisfied. Further, until the predetermined conditions are satisfied, adding handwriting using an electronic pen (18) is enabled, and if predetermined erasure conditions are satisfied, the rewriting device (14) erases the image displayed on the electronic paper (12).