Determining charge on a facial-tracking sensor
US12254129B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 28, 2022 |
| Grant date | Mar 18, 2025 |
| Priority date | — |
| Expiry date | Jan 10, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/013
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Examples are provided that relate to determining a capacitance based on a charge accumulated on a sense capacitor electrode. One example provides a head-mounted device comprising a facial-tracking sensor, a controller, and a charge sensing circuit connected to the facial-tracking sensor. The facial-tracking sensor includes a sense capacitor electrode configured to be positioned proximate to a surface of a face and form a capacitance based upon a distance between the sense capacitor electrode and the surface of the face, and the controller configured to apply a reference voltage to the sense capacitor electrode. The charge sensing circuit is configured to determine the capacitance of the sense capacitor electrode by determining an amount of charge accumulated on the sense capacitor electrode resulting from the reference voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.