| 摘要 |
A print media edge detection method including: generating reference data by scanning an edge zone of a sheet of print media using an optical sensor and detecting the amount of reflected light; if the edge zone of the sheet lies in a sensing zone of the optical sensor, calculating measuring data by scanning the edge zone and detecting the amount of reflected light; checking a voltage range of the edge zone from the measuring data, calculating a most frequently appearing voltage value within the voltage range, and setting the most frequently appearing voltage value as an edge position voltage value; and setting a position of the sheet corresponding to the edge position voltage value in the reference data as an edge position. Since the edge position is exactly detected, a printing error of the edge position decreases. <IMAGE> |
