Touch screen using echo-location
US7079118B2 · kind B2 · utility
33Cited by
4References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 23, 2004 |
| Grant date | Jul 18, 2006 |
| Priority date | — |
| Expiry date | Feb 23, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/96011
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A plurality of acoustic wave transducers are coupled to a substrate at predetermined spaced apart locations. At least one of the transducers is operative to emit an acoustic wave that propagates along the substrate, with the other transducers operating as receivers of acoustic waves. The receivers are coupled to a control system that is operative to determine a location at which the substrate is perturbed based on time associated with travel of an acoustic wave from a transmitter, to the location of the perturbation, and from the perturbation to each of the respective receivers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.