All pixels read type electronic endoscope system

Details All pixels read type electronic endoscope system All pixels read type electronic endoscope system

1997-09-02

1999-12-14

Britton, Howard

Television

Special applications

With endoscope

348 69, 348 70, A61B 104, A61B 106, H04N 718

Patent

active

060024259

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 signals can also be performed at a double speed.

REFERENCES:
patent: 5233416 (1993-08-01), Inoue

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