Touch screen
US6741237B1 · kind B1 · utility
52Cited by
28References
49Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 23, 2001 |
| Grant date | May 25, 2004 |
| Priority date | — |
| Expiry date | May 3, 2022 |
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.