| 摘要 |
PURPOSE:To prevent the display of an electrochromic display device from being erased completely by erasing all digits except a corrected digit only when a carry signal carried from the corrected digit is inputted, and outputting a coloring signal a specific time later. CONSTITUTION:When a signal S8 is inputted to a minute digit display driving control circuit 11d, all minute digits are erased and writing operation is started. At this time, hour digits are held in the preceded display state. When a minute counter 7 outputs a carry signal 1H, an hour digit driving control circuit 11h and an hour digit driving circuit 12B erase the hour digits of the electrochromic display device 2 with a decoloring signal and writing operation is started by a coloring signal a specific time later. |
