Capacitive sensing without a baseline
US9563319B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 18, 2014 |
| Grant date | Feb 7, 2017 |
| Priority date | — |
| Expiry date | Mar 20, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2203/0339
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A processing system for a capacitive sensing device, including: a sensor module coupled to multiple sensor electrodes and configured to receive multiple resulting signals from the multiple sensor electrodes, where the multiple electrodes includes a first sensor electrode, a second sensor electrode adjacent to the first second electrode, a third sensor electrode adjacent to the first sensor electrode and the second sensor electrode, and a fourth sensor electrode adjacent to the third sensor electrode; and a determination module configured to: determine, based on the multiple resulting signals, first differential capacitive sensing data between the first sensor electrode and the second sensor electrode; determine, based on the multiple resulting signals, second differential capacitive sensing data between the third sensor electrode and the fourth sensor electrode; and determine user contact information based on at least one of the first differential capacitive sensing data and the second differential capacitive sensing data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.