| 摘要 |
<p>PURPOSE:To improve the operability of an input device by mounting a menue sheet respectively having an identification mark consisting of a magnet on one side of the sheet body and detecting the number of marks and their positions, etc. on the basis of induced voltage to discriminate the kind of the menue sheet. CONSTITUTION:An input plate 200 has a case body 201 having the same size as that of a menue sheet and consisting of nonmagnetic metal or the like and its inside is provided with a menue input part 210 and an identification mark detecting part 220. In the menue input part 210, a menue sheet is mounted, an input pen is brought into contact with any part of the input menue and the position of the contact part is detected through a tablet. In the identification mark detecting part 220, instantaneous magnetic field variation is generated in a coil 223 by supplying pulse current and transmitted to a magnetic distortion transmitting medium 221 as a vibration wave. Then, the movement of magnetic flux variation due to the vibration wave on a time axis in accordance with the increase of an electric/magnetic coupling factor which may be generated immediately under an identification magnet is detected by a coil 225 as induced voltage to detect the number of identification marks, positions, etc.</p> |
