Patent ID: 7755614

Claim:
A motion detection system, comprising: a touch panel having a plurality of metal sensors, wherein each of the metal sensors in turn is set as a detecting sensor; a plurality of switching units, electrically connected to the metal sensors respectively, each of the switching units either floating or connecting correspondingly the metal sensor to a first voltage or a second voltage according to a control signal, wherein, during a charge stage, a selected one of the metal sensors which is activated as the detecting sensor is connected to the first voltage and the other metal sensors are connected to the second voltage, and during a detecting stage, the detecting sensor is floated and the other metal sensors are connected to the first voltage; a detection unit, for calculating a discharge time of the detecting sensor and generating a detection result signal during the detecting stage according to the control signal, a voltage of the detecting sensor and a predetermined reference voltage; and a control unit, for generating the predetermined reference voltage, the control signal and a motion signal according to the detection result signal.