Method for detecting background signals of capacitive sensing device
US9563321B2 · kind B2 · utility
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Key dates
| Filing date | Jun 12, 2015 |
| Grant date | Feb 7, 2017 |
| Priority date | — |
| Expiry date | Oct 14, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0446
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The method for detecting background signals of a capacitive sensing device includes obtaining several capacitance values by detecting a reference point selected from several sensing points in a frequency-hopping manner, and selectively executing a procedure for refreshing the background signals according to the capacitance values and a predetermined threshold. Accordingly, the process of signal-detection can be speeded up, and the signals having a frequency identical to a working frequency can still be identified. As a result, the accuracy of a signal-reading process can be maintained over time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.