Eliminating common mode noise in otuch applications
US9110552B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 6, 2013 |
| Grant date | Aug 18, 2015 |
| Priority date | — |
| Expiry date | Jun 6, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0446
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A processing device scans, during a first operation, a first plurality of electrodes along a first axis in a capacitive sense array to generate a first plurality of signals corresponding to a mutual capacitance at electrode intersections of the capacitive sense array. During a second operation, the processing device scans a second plurality of electrodes along a second axis in the capacitive sense array to generate a second plurality of signals corresponding to the mutual capacitance at the electrode intersections of the capacitive sense array, wherein the second operation occurs during a different period of time than the first operation. The processing device determines a first coordinate of a conductive object proximate to the capacitive sense array based on the first plurality of signals and a second coordinate of the conductive object based on the second plurality of signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.