Using 3D touch for tracking objects on a wet touch surface
US11340773B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 7, 2016 |
| Grant date | May 24, 2022 |
| Priority date | — |
| Expiry date | Oct 7, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2203/04108
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
This application is directed to detecting touch events on a touch sensing surface coupled to a capacitive sense array and one or more force electrodes. The capacitive sense array includes a plurality of sense electrodes configured to provide a plurality of capacitive sense signals. The force electrodes are configured to provide one or more force signals. A subset of sense electrodes are determined to be associated with a candidate touch based on the capacitive sense signals and their associated baseline values. When force associated with the force signals is below a predetermined force threshold, the candidate touch is determined as an invalid touch (e.g., coverage by a water drop on an area of the touch sensing surface corresponding to the subset of sense electrodes). Baseline values are adjusted for the subset of sense electrodes for determining subsequent touch events associated with the subset of sense electrodes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.