| 摘要 |
<p>PURPOSE:To perform pointing generating no feeling of physical disorder with the same sensation as a person shows the point on a three-dimensional space by a finger, by receiving the predetermined frequency signal transmitted from the pen point positioned on the three-dimensional space by microphones spaced apart from each other at three or more points. CONSTITUTION:Microphones 2a-2c are arranged at positions, which are spaced apart by a predetermined distance from each other of three corners of a flat table 1 and a pen 3 transmitting a signal of predetermined frequency is positioned in a space so as to be movable to free positions. The distances between the pen 3 and the respective microphones 2a-2c are calculated on the basis of the receiving signals by the respective microphones 2a-2c of the signal transmitted from the pen 3. The three-dimensional coordinates of the pen 3 are calculated from the calculated result to be outputted as the input data to a display apparatus.</p> |
