Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Patent
1982-02-16
1985-01-22
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
250578, H01J 4014
Patent
active
044954093
ABSTRACT:
A photosensor comprising an array of a plurality of unit picture elements each of which is constituted by a serial connection of a photoconductor film and a diode or a combination of a photodiode and a diode connected in series to the photodiode in the opposite rectifying direction, wherein the plurality of unit picture elements being divided into at least two groups, the unit picture elements belonging to the respective groups being connected to corresponding first group of wiring conductors provided in association with the groups, respectively, while the unit picture elements belonging to the different groups and located at same positions in the different groups relative to one another are connected together to respective second group of wiring conductors, including a first biasing controller for applying a voltage to the first group of wiring conductor connected to the picture element from which a signal is to be read out, the voltage serving for biasing forward the diode of the picture element to be read out, while no forward bias voltage is applied to the first group of wiring conductors connected to the unit picture elements from which signals are not to be read out; and a second biasing controller provided for one of the second group of wiring conductor connected to the unit picture element to be read out for grounding or biasing forward the diode of the picture element to be read out through a capacitance, whereby electric charges stored at nodes located between the photoconductor films and the diodes or between the photodiodes and the diodes, respectively, are sequentially read out as signals.
REFERENCES:
patent: 3900716 (1975-08-01), Kawabata et al.
patent: 4067046 (1978-01-01), Nakatani et al.
patent: 4155006 (1979-05-01), Sato et al.
patent: 4288702 (1981-09-01), Ozawa et al.
patent: 4369372 (1983-01-01), Yoshioka et al.
Baji Toru
Koizumi Naohiko
Shimomoto Yasuharu
Tanaka Yasuo
Tsukada Toshihisa
Hitachi , Ltd.
Nelms David C.
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