All pixels read type electronic endoscope system
US6002425A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 2, 1997 |
| Grant date | Dec 14, 1999 |
| Priority date | — |
| Expiry date | Sep 2, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/555
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
This all pixels read type electronic endoscope system is to read out all the pixels obtained by one exposure in an image pickup device, thereby to improve the picture quality. In this system, a CCD and a CCD driver circuit are provided, and with respect to the video signals obtained by one exposure within a 1/60 sec period, the signals of odd lines are read out in the next period and then the signals of even lines are read out in the period subsequent to the next period, and the signal data of odd line is stored in a first memory, while the signal data of even lines is stored in a second memory. The reading of the even line data is enabled by a light interception by a light chopper. And, in a mixing circuit, the pixel data of odd and even lines are mixed together, and an image for one frame is formed based on the pixel mix signal. With this, the image signals of odd and even lines which are obtained in the same exposure can be read out without increasing the clock frequency, and a high-quality image can be obtained particularly in a freeze-frame picture. Further, if a delay memory is used, high quality can be achieved also for a motion picture, and in addition, the reading of image…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.