Exposure control device
US5428421A · kind A · utility
9Cited by
2References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 8, 1994 |
| Grant date | Jun 27, 1995 |
| Priority date | — |
| Expiry date | Aug 8, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/75
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An exposure control device which permits exposure control either in an automatic mode or in a manual mode is arranged to smoothly perform the exposure control by holding exposure control information obtained immediately before change-over of the exposure control mode from one mode over to the other; and is provided with a correction circuit for uniformalizing an iris driving characteristic for the whole iris driving range by correcting the non-linearity of the characteristic.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.