| 摘要 |
[PROBLEMS] To avoid improper calibration state by touching a screen under a state where improper calibration is performed and confirming validity of calibration. [MEANS FOR SOLVING PROBLEMS] The display terminal comprises a touch panel provided on the screen, a touch panel driver generating the coordinate data of a touching point on the touch panel, and a control section performing calibration of the screen based on the coordinate data outputted from the touch panel driver. The control section reduces error between the actually measured coordinate data of the touching point and the theoretical coordinate data by confirming the fact that the difference of the X coordinate data and Y coordinate data generated by repeatedly touching the points on the touch panel other than the center thereof falls within an allowable range, respectively. |
