Apparatus for performing exposure control pertaining to the luminance level of an object
US5559555A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 16, 1995 |
| Grant date | Sep 24, 1996 |
| Priority date | — |
| Expiry date | May 16, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/72
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An exposing apparatus comprises: a lens group to fetch a light from an object; an iris to adjust a light amount from the lens group; an image pickup device to convert the light which passed through the iris into the electric signal; a detecting circuit to detect a luminance signal level from an output signal from the image pickup device; a reference level signal setting circuit to set an exposure control reference value to control the iris; an exposure control reference value modulating circuit to modulate the exposure control reference value when the iris is controlled; and a control circuit to set the exposure control reference value in correspondence to the luminance signal level when an output level of the detecting circuit is larger than a set value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.