System and method for automatically adjusting light source drive current during optical navigation operation

摘要

A system and method for automatically adjusting a drive current to a light source during an optical navigation operation uses brightness characteristics of captured frames of image data to determine whether each of the frames of image data belongs to one of at least first and second types of frames of image data. The drive current is adjusted depending on counts of the frames of image data belonging to the first and second types of frames of image data.