Video endoscope apparatus employing device shutter
US4884134A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 30, 1988 |
| Grant date | Nov 28, 1989 |
| Priority date | — |
| Expiry date | Aug 30, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S600/921
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An endoscope apparatus has a storage-time switching circuit for shortening the charge storage time of a solid state imaging device provided with a photoelectric conversion function, and the quantity of illuminating light to be projected an object is increased in association with the operation of this switching circuit. In this transient process of increasing the quantity of illuminating light, the level of video signals obtained by imaging is compared with a proper reference level. If the level of the video signals reaches the reference level, the video signals are stored in a storage circuit. Accordingly, it is possible to obtain a frozen picture which is scarcely blurred.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.