Simultaneous time domain differential sensing and electric field sensing
US11592942B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 12, 2021 |
| Grant date | Feb 28, 2023 |
| Priority date | — |
| Expiry date | Sep 2, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/960775
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Systems and methods for determining a touch input are provided. The systems and methods generally include measuring the peak voltage at an electrode over a measurement period and determining a touch input based on the peak voltage. The systems and methods can conserve computing resources by deferring digital signal processing until after a peak electrode capacitance has been sampled. The systems and methods are suitable for capacitive sensors using self-capacitance and capacitive sensors using mutual capacitance. The systems and methods are also suitable for capacitive buttons, track pads, and touch screens, among other implementations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.