Controlling an exposure time for digital cameras
US7428378B1 · kind B1 · utility
40Cited by
14References
29Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 29, 2005 |
| Grant date | Sep 23, 2008 |
| Priority date | — |
| Expiry date | Oct 13, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/531
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Various methods, apparatuses, and systems in which a digital photography device includes a global shutter to control exposure time, a sensor array, and a flash illumination are described. The global shutter is in the optical path of light going to the sensor. The flash illumination generates a pulsed illumination. The shutter speed of the global shutter during a pre-flash illumination substantially matches the shutter speed during the flash illumination during the taking of a picture using the flash illumination based on the global shutter receiving a trigger signal from a controller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.