Near distance detection for autofocus
US12028611B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 20, 2022 |
| Grant date | Jul 2, 2024 |
| Priority date | — |
| Expiry date | Jun 4, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/673
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Various embodiments disclosed herein include techniques for determining autofocus for a camera on a mobile device. In various instances, a depth imaging system (e.g., a time-of-flight autofocus system (ToF-AF system)) is used to determine distance of a subject in order to determine autofocus for a camera. In some instances, however, the ToF-AF system may be unable to detect a subject that is very close to the camera when the objects are below a minimum detectable distance of the ToF-AF system. In such instances, an existing IR detector outside of the ToF-AF system may be implemented to measure reflected signals from the ToF-AF system. A power ratio may be determined from the reflected signals and used to determine information about the distance of the subject from the camera.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.