| 摘要 |
PROBLEM TO BE SOLVED: To provide a low-cost and portable display electronic display device which makes it possible to obtain distinct contrast of black and white. SOLUTION: This electronic display device has a casing, a display region which is disposed in this casing and displays contents to users, a memory which is disposed in the casing and holds data to be drawn to the contents accessible by the users, an electrophotographic assembly which is disposed in the casing and is constituted to draw the contents accessible by the users from the data held in the memory by using black toners and materials which are arranged in proximity to the electrophotographic assembly, are the materials of the correspondingly amount determined to temporarily receive the contents drawn by the electrophotographic system and to enable the users to make access to the contents by presenting the contents within the display region described above and are the materials of the correspondingly amount selected to enable the users to obtain the contrast of black and white when using the contents together with the black toners. |
