Capacitive position sensor system
US9977061B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 26, 2013 |
| Grant date | May 22, 2018 |
| Priority date | — |
| Expiry date | May 28, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0445
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A capacitive position sensor system for determining the position of an object, in particular on a surface of a contactless smartcard, is provided. The object is positioned within a sensitive area of the capacitive position sensor system and changes the capacitance of capacitors being arranged underneath the object. The capacitive position sensor system comprises a set of sensing elements being arranged in the form of a column. Each sensing element includes a first capacitor having a first electrode and a second electrode and a second capacitor having a first electrode and a second electrode. A specific weighting factor is assigned to each capacitor. A control unit is adapted to determine the position of the object in one dimension by analyzing the results of a plurality of sensed voltage levels for the first capacitors and the second capacitors of a plurality of integration cycles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.