| 摘要 |
<p>PURPOSE: A tablet with line antennas is provided to minimize the width of a bezel of a display device by reducing the width of a pattern of the line antennas flowing in the outside of an electronic pen detecting section. CONSTITUTION: A closed-loop antenna is earthed to form the circumference of an electronic pen detecting section. Line antennas are parallelized in the closed loop antenna, are connected to the closed-loop antenna, and penetrate the detecting section through the closed-loop antenna. Line selecting circuits are connected to the other end of the line antennas and select one of the line antennas to be set as a differential output. A coordinate detecting circuit determines the position of an electronic pen based on the selected line antenna using the induced voltage of the differential output.</p> |
