Patent ID: 8917256

Claim:
A device for control interface sensitive to a movement of a body or of an object, comprising: a detection surface, at least one capacitive sensor, said sensor(s) each comprising a measurement electrode including an active surface facing the detection surface, or substantially coinciding with said detection surface, electronic circuits for exciting the measurement electrodes at an alternating (AC) electrical potential and processing the signals emanating from said capacitive sensors, so as to provide distance information between the active surface of the electrodes and said object, a guard of electrically conducting material disposed in proximity to the measurement electrodes, at least along a face of the measurement electrodes substantially opposite to the active surface, wherein the guard is excited at an alternating (AC) electrical potential substantially identical to the alternating (AC) electrical potential of the measurement electrodes, the active surfaces of the measurement electrodes are independent of one another, and the electronic circuits of excitation and processing are further arranged to interrogate said measurement electrodes independently of one another.