Computer input device providing absolute and relative positional information

摘要

A computer input system includes a base, a movable member that is displaceable relative to the base, and a sensor that is operably coupled to the movable member. The sensor provides an output signal to circuitry indicative of position of the movable member relative to the base. The circuitry defines movements of the movable member relative to the base as within an absolute motion region and a relative motion region.