Exposure control device for electronic endoscope

Details Exposure control device for electronic endoscope Exposure control device for electronic endoscope

1995-03-10

1997-03-25

Garber, Wendy

Television

Camera, system and detail

Solid-state image sensor

348 65, 348362, H04N 5232

Patent

active

056149492

ABSTRACT:
There is provided an electronic shutter control device for an electronic endoscope which can control exposure with high precision even if the intensity of incident light is high in a close-up and the like. The control device has a mask circuit for forming masks having a predetermined width in upper and lower portions of a monitor screen in a vertical scanning direction, and a detection circuit for verifying whether or not the intensity of incident light is higher than a predetermined value. An electronic shutter control circuit forms a discharge pulse for electronic shutter control from a driving pulse generated in a blanking period of a horizontal synchronizing signal when the intensity of incident light is lower than the predetermined value, and forms dense discharge pulses, whose number is, for example, 256 in one horizontal synchronizing signal, in an effective period of the horizontal synchronizing signal in an area masked in the vertical scanning direction when the intensity of incident light is higher than the predetermined value. High-precision exposure control can be achieved in a close-up by controlling the storage charge amount by the sweep control pulses and the like.

REFERENCES:
patent: 4805024 (1989-02-01), Suzuki et al.
patent: 5091779 (1992-02-01), Ams et al.
patent: 5422670 (1995-06-01), Fukui
patent: 5475420 (1995-12-01), Buchin

Affiliated with

Also associated with

Rating

Exposure control device for electronic endoscope does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Exposure control device for electronic endoscope, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Exposure control device for electronic endoscope will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2207651