Patent ID: 8525811

Claim:
A capacitive touch panel device comprising: a touch panel having a plural conductive wires; a multiplex selector electrically connected to the plural conductive wires of the touch panel; a first switch electrically connected to the multiplex selector; a first resistor having a first resistor value; a second switch electrically connected to the first resistor and the first switch; a capacitor having a capacitor value; the capacitor electrically connected to the first switch and the second switch; a third switch electrically connected to the capacitor; an analog to digital converter; a fourth switch electrically connected to the analog to digital converter and the third switch; and an integrating circuit electrically connected to the second switch and the fourth switch, wherein the third switch is switched to a DC power source and the second switch is switched to the capacitor for charging the capacitor; there is a conductive resistor with a second resistor value existed in the conductive wires between the contacting point of the touch panel and the multiplex selector; the third switch is switched to the fourth switch so to make the analog to digital converter electrically connect to the capacitor to read a first voltage value after the capacitor is charged; the first switch is switched to the capacitor so to make the capacitor charge a floating capacitor which is induced by an object applied to a contacting point on the touch panel; and the integrating circuit records an absolute value of a current flowing through the first resistor.