| 摘要 |
<p>A touch sensor comprises a substrate capable of propagating acoustic waves and having at least one touch-sensitive surface, a touch on said surface causing a perturbation of said acoustic waves; at least one transmitting transducer coupled to said substrate for producing acoustic waves therein; and means coupled to said substrate for sensing a touchinduced perturbation of said acoustic waves; the improvement wherein said substrate is made of a transparent material with substantially less acoustic absorption than soda-lime glass. Said material is selected from the group consisting of borosilicate glass and barium glass. Said means for sensing a touch-induced perturbation comprises means for determining the position of a touch on said surface and further comprises an electronic analyzer, coupled to said receiving transducer, for processing said electrical signals to determine said touch position on said sensor. Said means for sensing a touch-induced perturbation also comprises means arranged on said substrate for diverting said acoustic waves produced by a single transmitting transducer into a plurality of paths extending across said plurality of regions.</p> |
