| 摘要 |
<p>PROBLEM TO BE SOLVED: To eliminate large disordering of a magnetic flux distribution even under a slight influence of an external field and enables precise coordinate detection by laminating and arranging a coil group which causes electromagnetic induction with a position indicator and a shield member molded by mixing amorphous metal powder with an electric insulating substance. SOLUTION: A coil 101 is arranged in the position indicator, and a printed board 200 which constitutes a loop coil, an amorphous powder mixed resin sheet 300, an iron plate 400, an X-axis loop coil 210 constituted on the printed board 20, and a Y-axis loop coil 220 constituted on the printed board 200 are put one over another to constitute the tablet. To the X-axis loop coil 210 and Y-axis loop coil 220, a transmitting circuit and a receiving circuit which send and receive radio waves and a control circuit which control the switching, etc., of the loop coils are connected, and a coordinate position indicated by the position indicator is detected from distributions of signal intensity detected by the respective loop coils.</p> |
