Infrared and capacitance based sensing for proximity detection
US9042833B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 21, 2011 |
| Grant date | May 26, 2015 |
| Priority date | — |
| Expiry date | Jul 30, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/3838
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A proximity detection module determines, using an infrared (IR) sensor of a user device, a distance between an object and the user device. The proximity detection module compares the distance to a distance threshold. If the distance is below the predefined distance threshold, the proximity detection module determines, using a capacitance sensor of the user device, a capacitance value associated with the object. The proximity detection module compares the capacitance value to a predefined presence threshold, and if the capacitance value meets or exceeds the predefined presence threshold, determines that the object comprises a body part of a user.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.