Trajectory estimation apparatus and method based on pen-type optical mouse

The pen-shaped optical mouse that can estimate the movement path for moving in peneop (pen-up) state devices and methods are provided. Trajectory estimation apparatus according to an embodiment of the invention, the timer of the movement path of the light source device, the state of the light source device calculates the first time that the optical input device moves while the first status module, and the calculated time and based on at least one of the moving speed of the light source device, and includes a trajectory estimation module to estimate the trajectory of the light source device in the light source device and the interval distance is not less than the threshold value between the ground. Pen-shaped, an optical mouse, a locus, recognized, corrected