Endoscope automatic light control apparatus and endoscope apparatus making use of the same
US4967269A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 27, 1989 |
| Grant date | Oct 30, 1990 |
| Priority date | — |
| Expiry date | Apr 27, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/555
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An endoscope automatic light control apparatus comprises an automatic light control apparatus for controlling the quantity of light incident to an imaging apparatus for imaging an endoscopic image so as to maintain a signal from the imaging apparatus substantially at a constant level. An automatic gaim control apparatus inputs a signal from the imaging apparatus and controls its output level so as to maintain the signal substantially at a constant level. The automatic light control apparatus and the automatic gain control apparatus respectively having a plurality of brightness information generating apparatuses generating brightness information based on the signal from the imaging apparatus. The plurality of brightness information generating apparatuses are different from each other in a method of generating brightness information and one of the plurality of brightness information generating apparatuses able to be selected. A selecting apparatus selects the brightness generating apparatus of the same method as the automatic light control apparatus and as the automatic gain control apparatus. The automatic light control apparatus controls the quantity of light based on the brightnes…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.