Electronic endoscope for producing a color image by extracting a

Abstract

An electronic endoscope system having an electronic endoscope inserted into a body cavity, a light source unit for successively supplying illumination lights into the electronic endoscope, a processor for converting an image pickup signal from the electronic endoscope into an image signal, and a monitor for displaying based on the image signal from the processor. The electronic endoscope is constituted of an inter-line reading type CCD for imaging an object and obtaining an image signal by photoelectric conversion, a drive circuit for driving this CCD, a pre-process circuit for converting the image pickup from the CCD into a video signal, and a pulse transformer for transmitting this video signal to the processor. The processor is constituted of an A/D converter circuit for converting the analog image signal transmitted through the pulse transformer into digital signals, R, G and B FIFO memories for freezing/frame position moving which store the digital signals converted by the A/D converter circuit, D/A converter circuits for D/A conversion of signals from the R, G, and B memories, and post-process circuits for forming video signals from analog signals supplied from the D/A converter circuits.