Reduced capacitive baseline shift via switching elements
US10133435B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 3, 2017 |
| Grant date | Nov 20, 2018 |
| Priority date | — |
| Expiry date | Apr 23, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/04166
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and related processing system and input device are disclosed, the method comprising driving a first capacitive sensing signal having a predefined first sensing frequency onto a first group of a plurality of sensor electrodes, and acquiring first capacitive measurements of resulting signals received by a second group of the plurality of sensor electrodes. Acquiring first capacitive measurements comprises applying a first demodulation signal having a predefined mixing period defined within a sensing period associated with the first sensing frequency. The method further comprises operating, based on the first demodulation signal, one or more switching elements coupled with one or more sensor electrodes of the first group or the second group, wherein the one or more switching elements are in a conducting state during the mixing period.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.