Patent ID: 6234957
Filing Date: 2001-05-22
Classification: A61B

Abstract:
An electronic endoscope system comprising:a light source unit that uses a halogen lamp as a light source and leads rays emitted from said halogen lamp to the tip of an electronic endoscope through a light guide;an image pickup device that picks up, through an objective optical system, an internal image of an object to be observed when the object is irradiated with illuminating rays from said light source unit;an image pickup device driving circuit that reads out one field signal successively at least twice from said image pickup device;a luminance enhancement circuit consisting of a delay circuit that delays the field signal read from said image pickup device for a predetermined time and an adder that adds a field signal output from said delay circuit to the same field signal read from said image pickup device; anda signal processing means that possesses an output from said luminance enhancement circuit as a single field signal.