Acoustic touch apparatus and method using touch sensitive Lamb waves
US10678380B2 · kind B2 · utility
2Cited by
40References
20Claims
0Family size
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Key dates
| Filing date | Nov 11, 2016 |
| Grant date | Jun 9, 2020 |
| Priority date | — |
| Expiry date | Feb 18, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0436
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Systems and related methods providing for touch sensors using high sensitivity Lamb waves are disclosed herein. A touch controller may comprise circuitry having operating frequency characteristics, including an operating frequency f and a frequency spread Δf; and circuitry configured to minimize effects of dispersion based upon at least one of selected operating frequency characteristics relative to a frequency dependence of a group velocity of propagating waves and a frequency dependent phase error, wherein the touch controller generates an excitation signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.