| 摘要 |
<p>PURPOSE:To prevent the erroneous input due to chattering by designating positions higher and lower the input position of a key input means, which corresponds to display on a display part, as valid positions. CONSTITUTION:A control circuit of an input device consists of CPU 21 which controls display on a display part 11 and detects the input due to a key input part 16, a ROM 22, and buffer memories 23-27. The buffer memory 23 designates the valid range of a switch part of the key input part 16 corresponding to display on the display part 11, and the buffer memory 24 is provided to confirm prevention of chattering for input, and the buffer memory 25 is provided for the display position of a ten key or the like, and the buffer memory 27 indicates which switch part of the key input part is depressed, and the buffer memory 26 stores AND between contents of memories 23 and 27. Invalid switch parts higher and lower than the valid switch part are designated as valid parts, and signals from them are processed as signals corresponding to valid display ranges.</p> |
