Touch keyboard having low noise interference
US10972099B2 · kind B2 · utility
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19Claims
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Key dates
| Filing date | Jan 16, 2020 |
| Grant date | Apr 6, 2021 |
| Priority date | — |
| Expiry date | Jan 16, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/960775
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A capacitive touch system including a drive end, a capacitive touch sensing device and a detection end is provided. The drive end inputs a modulated drive signal into an input channel of the capacitive sensing device, wherein the modulated drive signal includes a plurality of driving frequencies. The detection end detects a detection signal of an output channel of the capacitive sensing device and generates a two-dimensional detection vector corresponding to each of the driving frequencies. The capacitive touch system includes a touch panel or a touch keyboard.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.