| 摘要 |
<p>PURPOSE:To fetch exactly a timing signal corresponding to a period in which a magnetic generator contacts, by applying a variation of an interval of the first and the second plate materials, which is generated when a vibration detecting unit has been pressed, to plural vibration sensors. CONSTITUTION:A vibration detecting unit 30 and a liquid crystal display panel 40 are placed on a tablet 10, and contained as one body in a case 50. When a position designating magnetic generator (input pen) contacts the upper face of a plate material 32 of the vibration detecting unit 30, the plate material 32 is bent, and also vibrated and presses a vibration sensor 33, and a positive large voltage signal is generated. Subsequently, when the input pen is moved as it is, a small positive or negative voltage is generated in accordance with its movement. Thereafter, when the input pen is held up, the deflection of the plate material 32 is restored, the vibration is also attenuated, and a negative large voltage signal is generated. Only an output signal of the vibration sensor 33 in the vicinity of a coordinate in which the input pen is positioned is fetched, and a signal corresponding to a period in which the input pen contacts the plate material 32 is fetched.</p> |
