Touch sensor with adaptive touch detection thresholding
US9411472B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 8, 2011 |
| Grant date | Aug 9, 2016 |
| Priority date | — |
| Expiry date | Jun 14, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0446
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In one embodiment, a method includes receiving, by a controller coupled to a touch sensor, a plurality of signals from a plurality of sense electrodes, the plurality of signals indicative of an amount of capacitance between the touch sensor and an external object. The method further includes accessing a stored threshold value, determining a strength of a charge return path between the touch sensor and a ground, and adjusting the stored threshold value based on the determined strength of the charge return path. The threshold value indicates a threshold magnitude of the signals from the plurality of sense electrodes to process as a touch by the external object.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.