Exposure controlling apparatus of a camera having a plurality of areas for measuring brightness
US5023649A · kind A · utility
17Cited by
7References
34Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 19, 1989 |
| Grant date | Jun 11, 1991 |
| Priority date | — |
| Expiry date | Apr 19, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B7/09979
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Brightness of a central area in a scene to be photographed and brightness of a peripheral area around the central area are measured, and the brightnesses of respective areas are outputted as first and second values. When the second value is larger than the first value, the first value is corrected by a value which has no relation with the respective measured values. Consequently, a proper controlling brightness value is provided for controlling the exposure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.