| 摘要 |
PURPOSE:To eliminate the erroneous detection of a character position due to a light pen, by making the light pen full video luminous only in a character diaplay region or a character area except inter-character parts and inter-line parts. CONSTITUTION:When a light pen 7 is pressed to the screen of a display part 6, a light pen switch 8 is turned on to set a flip flop 9, and a light pen operation start signal 9a is outputted. Though a light pen pattern generator 14 outputs a light pen full video 14a by this light pen operation start signal 9a, a light pen full video signal 19a where the light pen full video 14a is blocked in inter-character parts 17 and inter-line parts 18 except a character display region 16 by a gate 19 is displayed on the dislay part 6. |
