| 摘要 |
<p>PURPOSE:To simplify the constitution of a position detecting part by detecting a position through the use of a resistance value varying corresponding to a magnetic bias quantity applied on a magnetic substance. CONSTITUTION:A position detecting device is constituted of a position detecting part 10 consisting of lengthy shape magnetic substance 11a-11h arranged in parallel keeping a prescribed space with each other, an input pen 20 which generates a magnetic bias, a conversion circuit 30, a signal selection circuit 40 which switches and connects the conversion circuit 30, and the above stated magnetic substance 11a-11h, and a position detection circuit 50. And by positioning one end of the input pen 20 on the upper parts of the magnetic substance 11a-11h, and applying the magnetic bias from the tip of the pen, the resistance value R of each of the magnetic substance 11a-11h shows the minimum value for the magnetic substance 11 positioned nearest to the position, and the values go higher gradually as they are separated from the position. In this way, respective voltage of each of the magnetic substance 11a-11h in an X direction is taken out at the position detection circuit 50, from the state of the resistance value R, and a voltage value having the minimum value is found by performing an arithmetic operation, thereby the coordinate value of the input pen 20 being decided.</p> |
