Noise measurement in capacitive touch sensors
US9448267B2 · kind B2 · utility
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16References
17Claims
0Family size
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Key dates
| Filing date | Jan 13, 2014 |
| Grant date | Sep 20, 2016 |
| Priority date | — |
| Expiry date | Mar 7, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0443
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In certain embodiments, an apparatus comprises a charge-measurement capacitor and circuitry. The circuitry is configured to provide a pre-determined amount of charge to the charge-measurement capacitor and transfer an accumulated amount of charge on a sense electrode to the charge-measurement capacitor, the accumulated amount of charge having accumulated on the sense electrode due at least in part to noise. The circuitry is configured measure a voltage of the charge-measurement capacitor to determine the accumulated amount of charge.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.