Patent ID: 7825832

Claim:
A coordinate position detection device for use in a capacitive-coupling touch panel having a position-detection resistive film extending two-dimensionally whose potential periodically varies between a first potential range and a second potential range, the coordinate position detection device comprising: a current supply section passing a current through a coupling capacitance in the capacitive-coupling touch panel; a restoration section restoring the coupling capacitance having the current supplied thereto to a state prior to the supply of the current; a conversion section converting into a voltage a total amount of currents supplied by the current supply section to the coupling capacitance after the current supply section supplies the current to the coupling capacitance a plurality of times by repeating a current supply operation of the current supply section and a restoration operation of the restoration section; and a computation section detecting a position of a touched area based on an output of the conversion section, wherein a number of times that the current supply section supplies the current to the coupling capacitance when a potential at the position-detection resistive film extending two-dimensionally falls within the first potential range is substantially equal to a number of times that the current supply section supplies the current to the coupling capacitance when the potential at the position-detection resistive film extending two-dimensionally falls within the second potential range.