Driving sensor electrodes for proximity sensing
US9703430B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 30, 2014 |
| Grant date | Jul 11, 2017 |
| Priority date | — |
| Expiry date | Apr 1, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2203/04108
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In an example, a processing system includes: a sensor module comprising sensor circuitry, the sensor module configured to: drive, during a first time period, a first sensor electrode of a first plurality of sensor electrodes for absolute capacitive sensing, a second sensor electrode of the first plurality of sensor electrodes with a reference signal, and at least one sensor electrode of a second plurality of sensor electrodes with a guard signal, to acquire first changes of capacitance between the first sensor electrode and at least one input object in proximity with the first sensor electrode; and a determination module configured to determine positional information for the at least one input object based at least in part on changes of capacitance acquired by the sensor module.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.