| 摘要 |
<p>PURPOSE:To increase the precision and reliability of signal detection by accurately positioning and setting piezoelectric vibrators. CONSTITUTION:The ultrasonic coordinate input device has an ultrasonic wave propagation body 1, the piezoelectric vibrators 3 which are fixed at least >=2 places on the ultrasonic wave propagation body 1, and a frame body 4 which covers the ultrasonic wave propagation body 1, and the piezoelectric vibrators 3 are positioned and held in the frame body 4 mutually at constant intervals.</p> |
