Acoustic condition sensor employing a plurality of mutually non-orthogonal waves
US5986224A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 23, 1998 |
| Grant date | Nov 16, 1999 |
| Priority date | — |
| Expiry date | Dec 23, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S367/907
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A touch sensor, having an acoustic wave transmissive medium having a surface and a touch sensitive portion of the surface, a transducer system for emitting acoustic energy into the medium, and a receiver system for receiving the acoustic energy from the substrate as at least two distinct sets of waves, a portion of each of which overlap temporally at the receiver system or overlap physically by propagating in the touch sensitive portion along axes which are substantially non-orthogonal, the receiver system determining a position or a waveform perturbing characteristic of a touch on the touch sensitive portion. The receiver may be an amplitude detector or be sensitive to a phase-amplitude characteristic of the received acoustic waves.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.