Spatial-frequency-based capacitive motion sensor and method of using the same
US10579193B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 20, 2018 |
| Grant date | Mar 3, 2020 |
| Priority date | — |
| Expiry date | May 9, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2203/0338
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A spatial frequency based capacitive motion sensor and method of operating the same are disclosed. In one embodiment, the motion sensor includes an array of sense cells to capacitively sense capacitance variations induced by a surface in proximity to the array. The motion sensor further includes processing circuitry including a multiplexer and a processor to process motion dependent output signals from the array to measure motion of the surface in a direction parallel to a surface of the array. Generally, processor is adapted to execute a program to control the multiplexer to interconnect the sense cells of the array to configure the array as a comb-filter to detect at least one spatial frequency component of the capacitance variations, and to measure motion of the surface in a direction parallel to the array. Other embodiments are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.