| 摘要 |
<p>PROBLEM TO BE SOLVED: To perform an exact writing input by correcting the influence of inclination of a device. SOLUTION: An initial inclination angle arithmetic part 45 operates the initial value of inclination angle of a pen rod from acceleration in each axial direction of a pen rod coordinate system in a non-writing state. An inclination angle change arithmetic part 46 operates the change value of inclination angle of the pen rod from rotary angular velocity around each axis of the pen rod coordinate system in a writing state. An under-writing inclination angle arithmetic part 47 operates the inclination angle of the pen rod under writing from the initial value and change value of inclination angle of the pen rod. An acceleration correction part 48 corrects the acceleration into acceleration at the top end part of a pen. A coordinate transform operating part 49 transforms the coordinate system of corrected acceleration to a gravity coordinate system based on the inclination angle of the pen rod under writing and calculates the moving distance of top end part of the pen.</p> |
