Patent ID: 8395596

Claim:
A touch panel device comprising: a touch panel; a first sensing capacitor disposed in the touch panel; a first switch, electrically connected to the first sensing capacitor, for controlling an electrical connection between the first sensing capacitor and a power source; s second switch, electrically connected to the first sensing capacitor; a first storage capacitor, electrically connected to the second switch, for accumulating charges transferred from the first sensing capacitor so as to generate a first voltage when the second switch is turned on; a third switch, electrically connected to the first storage capacitor, for controlling an operation of discharging the charges accumulated in the first storage capacitor; a second sensing capacitor disposed in the touch panel; a fourth switch, electrically connected to the second sensing capacitor, for controlling an electrical connection between the second sensing capacitor and the power source; s fifth switch, electrically connected to the second sensing capacitor; a second storage capacitor, electrically connected to the fifth switch, for accumulating charges transferred from the second sensing capacitor so as to generate a second voltage when the fifth switch is turned on; a sixth switch, electrically connected to the second storage capacitor, for controlling an operation of discharging the charges accumulated in the second storage capacitor; and a differential amplifier, electrically connected to the first storage capacitor and the second storage capacitor, for generating a touch readout signal through performing a differential amplification operation on the first and second voltages.