Patent ID: 7333084

Claim:
A mobile electronic device comprising: a thumbwheel subassembly including a thumbwheel and a switch; a housing having an opening through which said thumbwheel protrudes; and a microprocessor inside said housing to compensate for inadvertent rolling of said thumbwheel down by a user while said user pushes said thumbwheel inwards by cancelling detection of a rotation downward of a thumbwheel if detection of a depressible input movement of said thumbwheel occurs within a predetermined time threshold of detection of said rotation downward; and a flat display screen; wherein said thumbwheel subassembly is oriented so that a direction of depressible input movement of said thumbwheel, when projected onto a plane substantially parallel to a plane of said flat display screen, is at an angle in a range of approximately 2 degrees to approximately 10 degrees with respect to a direction from a first point on a side of said housing having said opening to a second point directly across from said first point on an opposite side of said housing.