| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a touch panel device, excellent in touch location detection accuracy, that can prevent the degradation of touch location detection accuracy resulted from the external factor of the change of characteristics of a conductive film over time or the like and the factor inherent in the touch panel device. SOLUTION: This device has a resistor Rz connected through a switch provided between an electrode on the circumference part of the conductive film on the touch panel face and one end to an alternating current generation means for supplying alternating current to the electrode, and a current measuring means Rk provided between the electrode and the alternating current generation means, and has a function of making corrections, for a touch location calculation value based on a touch signal, using a self-correcting value sought based on an offset voltage Vf , a voltage V0 at both the ends of the current measuring means during switch-on for correcting the change over time of the value of resistance of the conductive film, or the like.</p> |
