Ultrasonic touch sensing parasitic wave rejection
US11392250B1 · kind B1 · utility
1Cited by
0References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 31, 2020 |
| Grant date | Jul 19, 2022 |
| Priority date | — |
| Expiry date | Dec 31, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/04144
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Improving the accuracy of ultrasonic touch sensing via the reduction, elimination and/or rejection of parasitic ultrasonic reflections caused by unintended touches is disclosed. The adverse effects of these parasitic reflections can be mitigated by disrupting the symmetry of the true reflections (from the intended touch) and the parasitic reflections (from unintended touches) so that the true touch can be disambiguated from unintended touches. Identification of the true touch can then enable accurate touch localization.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.