PURPOSE: To improve the coordinate detecting accuracy by providing a vibration proofing material which absorbs vibrations at prescribed locations on the surface or back of outer margin section of a vibration transmitting plate.
CONSTITUTION: A vibration proofing material 7 is fitted to the surface (on both side or one side) of the peripheral section of a vibration transmitting plate 8 and a vibration sensor 6 is mounted between the side margins of the plate 8 surrounded by the material 7. Therefore, the transversal wave component of the vibration inputted from a vibration pen 3 is largely damped by the vibration proofing member 7 mounted on the surface of the vibration transmitting plate 8 and longitudinal elastic waves are detected by means of the sensor 4 in such a state where nearly only the longitudinal waves are detected. Thus influences of the transversal waves can be reduced and the coordinate detecting accuracy can be improved.
Taniishi, Shinnosuke
Kobayashi, Katsuyuki
Mori, Shigeki
Kaneko, Kiyoshi
Suzuki, Noriyuki
Tanaka, Atsushi
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