Patent ID: 6351257
Filing Date: 2002-02-26
Classification: G06F

Abstract:
A pointing device comprising:a housing; a line-shaped contact image sensor installed on an upper side of the housing for sensing a line-shaped image and generating a corresponding line image signal, each line image signal comprising a predetermined number of data bits; and an image processing circuit installed in the housing and connected to the image sensor for receiving and processing the line image signal generated by the image sensor; wherein a user can move an image picture across the image sensor in a direction perpendicular to the line direction of the image sensor to sequentially generate a series of line image signals, and the image processing circuit saves the series of line image signals in a bit map format which contains the image of the image picture in it, and then the user can move the image picture across the image sensor to generate a first line image signal and a second line image signal, and the image processing circuit will convert the first and second line image signals into first and second coordinates according to the positions of the first and second line image signals within the bit map, and generate a pointing signal according to the difference between the first and second coordinates.