| US 7,456,825 B2 | ||
| Acoustic touch sensor with low-profile diffractive grating transducer assembly | ||
| Joel C. Kent, Fremont, Calif. (US); Robert Adler, Northbrook, Ill. (US); and Charles Dudley Copper, Harrisburg, Pa. (US) | ||
| Assigned to Tyco Electronics Corporation, Berwyn, Pa. (US) | ||
| Filed on Oct. 06, 2006, as Appl. No. 11/544,188. | ||
| Application 11/544188 is a continuation of application No. 10/603514, filed on Jun. 24, 2003, granted, now 7,119,800. | ||
| Prior Publication US 2007/0024599 A1, Feb. 01, 2007 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. G06F 3/043 (2006.01) | ||
| U.S. Cl. 345—177 [178/18.01; 310/313 D; 310/334] | 22 Claims |
| 1. A touch sensor, comprising:
an acoustic substrate having a surface;
an acoustic transducer comprising a piezoelectric element; and
an acoustically diffractive grating disposed between the substrate and the transducer, the diffractive grating coupling acoustic
energy within the acoustic transducer to an acoustic wave propagating along the surface of the substrate.
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