Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Patent
1992-06-19
1993-12-21
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
35821319, H01J 4014
Patent
active
052723283
ABSTRACT:
An image pickup apparatus comprises a first line sensor and a second line sensor. A first control circuit controls an accumulation time of the first line sensor based on an output signal of the first line sensor. A second control circuit controls an accumulation time of the second line sensor based on an output signal of the second line sensor. A compensating circuit compensates a level difference between a level of the output signal of the first line sensor and a level of the output signal of the second line sensor by setting a control characteristic of the first control means to be different from a control characteristic of the second control means.
REFERENCES:
patent: 4479062 (1984-10-01), Kawasaki et al.
patent: 4701626 (1987-10-01), Ishizaki et al.
patent: 4990917 (1991-02-01), Kohdaka
Canon Kabushiki Kaisha
Le Que T.
Nelms David C.
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