Touch panel sensor system having multi-frequency drive signals
US9256329B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 19, 2012 |
| Grant date | Feb 9, 2016 |
| Priority date | — |
| Expiry date | Jun 20, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0446
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A touch panel sensor system configured to generate simultaneous drive signals having different frequencies to improve noise immunity is described. The touch panel sensor system includes a sensor configured to detect a change in capacitance associated with a touch upon a touch panel. The system also includes a drive component connected to the sensor and is configured to simultaneously generate a plurality of drive signals to simultaneously drive the sensor. Each drive signal has a different frequency characteristic with respect to the other drive signals. The system also includes a measuring component connected to the sensor and is configured to individually demodulate a plurality of signals to determine the change in capacitance. Each signal corresponds to a respective drive signal (e.g., the signal has the same, or approximately the same, frequency characteristic as the respective drive signal).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.