| 摘要 |
The sensor unit of each of a first bar housing unit and second bar housing unit is moved. The moving amount is measured and stored. The distribution of a light amount received by the light receiving unit of the sensor unit of each of the first bar housing unit and second bar housing unit is detected, and whether the moving amount is appropriate is determined based on the detection result. A calculation value used when the coordinates of the pointed position in the coordinate input effective region are calculated based on variations of the light amount distribution is corrected by using the moving amount stored when it is determined that the moving amount is appropriate. |
