Touch apparatus, capacitive touch sensing circuit thereof, and touch sensing method using the same
US9836172B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 4, 2016 |
| Grant date | Dec 5, 2017 |
| Priority date | — |
| Expiry date | Mar 20, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/044
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A touch apparatus, a capacitive touch sensing circuit of the touch apparatus, and a touch sensing method are provided. The capacitive touch sensing circuit includes a switching capacitor integrating circuit, an encoding circuit, a feedback circuit, and a decoding circuit. The switching capacitor integrating circuit receives an input signal and integrates the input signal to generate an output signal. The encoding circuit receives and encodes the output signal to generate an encoded result. The feedback circuit provides a charge dissipation path for discharging charges from the switching capacitor integrating circuit, and the feedback circuit receives the encoded result and adjusts a charge dissipation ability provided by the charge dissipation path according to the encoded result. The decoding circuit receives and decodes the output signal to generate a touch detecting result.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.