Patent ID: 7710392

Claim:
A pointing device for a computer system including a displacement transducer of the pointing device, wherein said displacement transducer comprises: an inertial sensor to supply first acceleration signals indicative of an acceleration of the pointing device according to two detection axes; and processing means, associated to said inertial sensor for generating velocity signals indicative of a velocity of the pointing device, on a basis of said first acceleration signals; wherein said processing means includes state-recognition means for selectively recognizing a rest condition and a motion condition of the pointing device, on a basis of said velocity signals; and estimating means, controlled by said state-recognition means for determining an estimate of stationary disturbance contained in said first acceleration signals when the pointing device is in the rest condition; wherein said processing means comprise subtraction means for subtracting said estimate from said first acceleration signals and for generating second acceleration signals, wherein said processing means comprise first integrating means for generating said velocity signals from said second acceleration signals.