Stop control apparatus for electronic camera
US4558368A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 14, 1984 |
| Grant date | Dec 10, 1985 |
| Priority date | — |
| Expiry date | Feb 14, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S358/906
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A stop control apparatus for an electronic camera capable of performing both still picture photographing and motion picture (video) photographing operations. A video exposure control circuit and a still exposure control circuit produce first and second operating signals during motion picture and still picture photographing operations, respectively. A selected one of the signals is applied to operate an electromagnetic diaphragm control mechanism composed of an electronic drive device mechanically coupled to operate the aperture blades of the camera. An aperture opening regulator determines the aperture opening amount in accordance with a selected aperture value, with the regulating means operating by producing a force which acts against the force produced by the electromagnetic drive device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.