Method of fast automatic exposure or gain control in a MOS image sensor
US7015956B2 · kind B2 · utility
19Cited by
7References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 25, 2002 |
| Grant date | Mar 21, 2006 |
| Priority date | — |
| Expiry date | Jul 15, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/72
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a CMOS image sensor, it is important to control the exposure time or gain. For varying changes in ambient light, the exposure time of the array must be changed. The present invention describes a method for controlling the exposure time or gain to ensure a smooth and fast change in the brightness of the obtained image. If the exposure time is the be decremented or incremented, then the gain control is increased or decreased, respectively to smooth out the changes in image brightness. This substantially reduces image flicker.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.