Control apparatus for image sensor

Details Control apparatus for image sensor Control apparatus for image sensor

1988-09-26

1991-04-16

Adams, Russell E.

354432, 354402, G03B 1336, G03B 708

Patent

active

050086987

ABSTRACT:
A control system for an image sensor that has an array of pixels and a fetching circuit. During a charge accumulation interval each pixel generates a corresponding instantaneous pixel signal cumulatively responsive to the light the pixel has received from an incident image. At the end of the accumulation interval, the fetching circuit composes an image signal from the values attained by the array's various instantaneous pixel signals. The control system has a drive control circuit and a contrast detector. The contrast detector is coupled to the array for deriving an instantaneous image contrast signal from the instantaneous pixel signals. The drive control circuit then uses the instantaneous image contrast signal for adjusting the array's accumulation interval so the image signal will have good contrast.

REFERENCES:
patent: 4410258 (1983-10-01), Aoki et al.
patent: 4643557 (1987-02-01), Ishizaki et al.
patent: 4660955 (1987-04-01), Ishida et al.
patent: 4719486 (1988-01-01), Hosino et al.

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