| 摘要 |
<p>PURPOSE:To correctly detect a touch position by providing a correcting means to adjust each difference between the other edge potential of an oscillator and a common connecting point potential at other edge and one side edge of an X axis direction to zero together. CONSTITUTION:To one edge and other edge of the X axis direction of a resistance layer 1 of a touch panel, an (n) number of switches 21-2n and 31-3n is respectively connected. In the same way, to one edge and other edge of the Y axis direction of the resistance layer 1, an (n) number of switches 41-4n and 51-5n are connected. The switches are connected from the common connecting point of switches 2 and 4 through a resistance 6 and from the common connecting point of switches 3 and 5 through a resistance 8 to an oscillator 7. Further, the switches are connected from respective connecting points through respective voltage detecting devices 9-11 to a correcting means 20 having a subtracter 12, etc. The Y axis direction is also equipped with the same correcting means 23. Thus, by adjusting so that the output of subtracter circuits 17-19 of the subtracter 12 can be all zero, the device is not influenced by a stray capacity.</p> |
