Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1981-12-02
1984-09-11
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
250211J, H01J 4014
Patent
active
044712286
ABSTRACT:
A solid-state image sensor which detects the quantity of light incident on image sensor cells during exposure and performs exposure control in accordance with an exposure value thus obtained. The solid-state image sensor is provided with a photoelectric converter having a plurality of non-destructive readout type image sensor cells arranged in a matrix form; an exposure detector for reading out stored information of predetermined ones of the image sensor cells during exposure, obtaining an added value of the stored information thus read out and detecting that the added value reaches a predetermined level; an exposure controller which is supplied with the detected signal from the exposure detector to control at least one of the charge storage time of each image sensor cell by an optical signal, the intensity of light incident on the image sensor cell and the photosensitivity of the image sensor cell; and a scanner for scanning the photoelectric converter to read out stored information of the image sensor cells during exposure.
REFERENCES:
patent: 3934161 (1976-01-01), Caywood
patent: 3944816 (1976-03-01), Harada
patent: 4338514 (1982-07-01), Bixby
patent: 4340819 (1982-07-01), Ogasawara
Konishi Masahiro
Nishizawa Jun-ichi
Fuji Photo Film Co. , Ltd.
Nelms David C.
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