Contact type image sensor device

Details Contact type image sensor device Contact type image sensor device

1991-01-11

1992-03-17

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

250211J, H01J 4014

Patent

active

050971204

ABSTRACT:
A contact type image sensor device comprises a plurality of photodiodes connected in a matrix, and an equal number of blocking diodes. A capacity ratio of a photo electric part constituting the photodiodes to a diode part constituting the blocking diode is in the range of 2:1 to 30:1. Dynamic range, magnitude of the signal current, light sensitivity and after image characteristics of the image sensor are improved according to the invention.

REFERENCES:
patent: 4764682 (1988-08-01), Swartz
patent: 4980546 (1990-12-01), Berger

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