Capacitive sensing with high pass filtering for segmentation
US10095363B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 28, 2016 |
| Grant date | Oct 9, 2018 |
| Priority date | — |
| Expiry date | Mar 28, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0446
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Embodiments described herein include a method for using multiple filtered images. The method includes acquiring changes of capacitance in a sensing region at a plurality of sensor electrodes in a capacitive sensor. The method also includes generating a capacitive frame based on the changes of capacitance and calculating one or more filtered capacitive frames by modifying the capacitive frame with a spatial filter. The method also includes performing clump detection on the one or more filtered capacitive frames, where clump detection includes detecting locations in each filtered capacitive frame exceeding a first threshold near locations that exceed a second threshold in the corresponding capacitive frame.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.