Motion based capacitive sensor system
US10409426B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 14, 2015 |
| Grant date | Sep 10, 2019 |
| Priority date | — |
| Expiry date | Jan 2, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/94036
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A proximity sensing system may include a conductive first trace and a conductive second trace adjacent to, interleaved with, and electrically isolated from the first trace. A density of the traces varies along a first axis such that rates of change of capacitance between the traces associated with movement, through an electric field, of an object in a direction of the first axis at a constant velocity are indicative of the direction. The sensing system may further include a conductive third trace adjacent to, interleaved with, and electrically isolated from the first trace. A first area between the first trace and second trace is independent of and isolated from a second area between the first trace and the third trace. Also, a density of the first and third traces may vary along the first axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.