AC line synchronization for capacitive sensing
US8576189B1 · kind B1 · utility
5Cited by
0References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 31, 2010 |
| Grant date | Nov 5, 2013 |
| Priority date | — |
| Expiry date | Jul 6, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/04166
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method includes powering multiple touch sensors using DC power derived from an AC power signal; monitoring the AC power signal and producing from the AC power signal a trigger signal that occurs repeatedly at a predetermined point in a cycle of the AC power signal; and initiating a scan of the touch sensors when the trigger signal occurs during each cycle of the AC power signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.