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发明授权
US6084577A Pen-shaped handwriting input apparatus using accelerometers and gyroscopes and an associated operational device for determining pen movement 有权
使用加速度计和陀螺仪的笔形手写输入装置和用于确定笔运动的相关联的操作装置

Pen-shaped handwriting input apparatus using accelerometers and gyroscopes and an associated operational device for determining pen movement
摘要：
A small-sized pen-shaped input apparatus precisely detects handwriting input. The apparatus compensates for the effects of the inclination of the pen-shaped input apparatus. An initial inclination angle calculating section calculates the initial value of the inclination angle of a pen shaft in a gravity coordinate system. The inclination angle variation calculating section calculates a variation value of the inclination angle of the pen shaft. A handwriting inclination angle calculating section calculates the inclination angle of the pen shaft when writing. A coordinates conversion calculating section converts the coordinate system of the acceleration from the pen shaft coordinate system to the gravity coordinate system. A movement amount calculating section calculates the movement direction and the movement distance of the pen's tip end. Finally, a handwriting detecting section detects a state of handwriting or non-handwriting.
摘要（中）：

小型笔形输入装置精确地检测手写输入。 该装置补偿笔形输入装置的倾斜度的影响。 初始倾斜角计算部计算重力坐标系中的笔轴的倾斜角度的初始值。 倾斜角度变化计算部分计算笔轴的倾斜角度的变化值。 手写倾斜角度计算部分计算书写时笔轴的倾斜角度。 坐标转换计算部将加速度的坐标系从笔轴坐标系转换为重力坐标系。 移动量计算部分计算笔的末端的移动方向和移动距离。 最后，手写检测部检测笔迹或非笔迹的状态。

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