Image Number 3 for United States Patent #7038662.
Systems and methods of pointing in hand-held devices are described. In accordance with this scheme, a user may control the position where a pointer is displayed on a display screen simply by changing the orientation of the hand-held device relative to a currently preferred device orientation, which is tracked automatically. In addition, unintentional device orientation changes, such as periodic device orientation changes that might be caused by carrying the hand-held device while walking or driving, are filtered out dynamically. In this way, the pointer may be positioned accurately and reliably at any one of a plurality of pointer screen locations based upon changes in device orientation under a wide variety of different usage conditions.