| 摘要 |
<p>PURPOSE:To reduce the drop of coordinate detecting accuracy due to an unnecessary magnetic field formed from converged conductors in conductor drawing parts by arranging a feeder to a common conductor of these conductor on a prescribed position close to the conductor drawing part arranged on an input board. CONSTITUTION:Drivers 4 select conductors 1 in accordance with output signals generated from a control circuit 11 to make current flow into the conductors. On the other hand, induced electromotive force due to the current flowing into the conductors 1 is generated in the detecting coils of an input pen 7. Thereby, the coordinates of the detecting coils of the pen 7 can be found out by executing the selection of the conductors and the setting of the current value by a control circuit 11 on the basis of a position detecting principle. The current flowing into the selected conductors is divided into 1/2 each and the divided current flows into the feeder 10. Since the feeder 10 passes near the drawing parts 3 of the conductors 1, an unnecessary magnetic field formed at the drawing parts 3 due to the current of the selected conductors is reduced down to 1/2.</p> |
