All-pixels reading type electronic endoscope apparatus
US6219091A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 13, 2000 |
| Grant date | Apr 17, 2001 |
| Priority date | — |
| Expiry date | Jan 13, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/136
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An all-pixels reading type electronic endoscope apparatus enables the function of controlling the quantity of light which becomes impossible of follow-up when a still picture having a good picture quality is displayed to be quickly restored by reading all the pixels. The data on all the pixels obtained by a CCD at one exposure are read while using a light chopper, and the data on the odd lines are stored in a first memory and the data on the even lines are stored in a second memory. These memories are inhibited from being written into at the point of time when they store the picture data obtained at the same exposure, and the field signals formed from the video signals are stored in third and fourth memories. When a still picture is displayed, the third and fourth memories are inhibited from being written into, while the first and second memories are released from the write-inhibit state. It is thus possible to quickly restore the light quantity control function by inputting the current luminance signal to an iris controller before the display of the still picture is stopped. In addition, if the shutter speed is raised when the stop of the light source is not in a full-open state, …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.