Semiconductor photosensor and driving method therefor

Details Semiconductor photosensor and driving method therefor Semiconductor photosensor and driving method therefor

1988-10-27

1990-07-31

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

307311, H01J 4014

Patent

active

049452266

ABSTRACT:
A photosensing system is described. Light rays to be sensed is incident on a photosensitive semiconductor device which allows much current to pass therethrough during receiving the incident light and which passes a little current when there is no incident light. The current passing through the semiconductor device is accumulated in a suitable storage means. The accumulated charge is detected, in order to judge the existence or the absence of the incident light, a certain time period after the pulsed signal is outputted.

REFERENCES:
patent: 4769534 (1988-09-01), Brand

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