Photo-electric converter having variable accumulation time

Details Photo-electric converter having variable accumulation time Photo-electric converter having variable accumulation time

1993-08-31

1995-11-21

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

348297, H01J 4014

Patent

active

054689546

ABSTRACT:
An image pickup apparatus has a first sensor, and first control circuitry for controlling an accumulation time of said first sensor based on an output signal of said first sensor and a first reference level. Also provided is a second sensor, and second control circuitry for controlling an accumulation time of the second sensor based on an output signal of the second sensor and a second reference level which is different from the first reference level. The second control circuitry also compensates a level difference between a level of the output signal of the first sensor and a level of the output signal of the second sensor.

REFERENCES:
patent: 4479062 (1984-10-01), Kawasaki et al.
patent: 4701626 (1987-10-01), Ishizaki et al.
patent: 4990917 (1991-02-01), Kohdaka
patent: 5182447 (1993-01-01), Nakayama
patent: 5272328 (1993-12-01), Furukawa

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