| 摘要 |
<p>PURPOSE:To erase the data at the inside of a corresponding area to a pen locus by calculating the displacement of this time to the point of a fetching sampling time and making the data significant to erase a partial picture when the sum is more than a fixed value. CONSTITUTION:When a sampling time comes, the present position of an input pen 3 is fetched to a CPU 5 through (x) axis and (y) axis coordinate detecting parts 6 and 7. The deviation of the coordinate value xi, yi of this time and a previous uptaking value is found on an (x), (y) coordinate value. When the sum is less than a reference value, they are judged to be adjacent and the data are ignored. On the other hand, when the sum of the deviation is more than the reference value, a position is apart comparatively, and the data are recorded to a buffer memory as significant data. When the processing is continued, the pen 3 goes round a fixed range, and the pen 3 is separated from the surface of a transparent digitizer 2, the CPU 5 erases displayed information existing inside the range area of a data value fetched to the buffer memory following it.</p> |
