Contact type image sensor device with specific capacitance ratio

Details Contact type image sensor device with specific capacitance ratio Contact type image sensor device with specific capacitance ratio

1990-04-02

1991-04-02

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

250211J, 357 30, H01J 4014

Patent

active

050049038

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: 4943839 (1990-07-01), Kumano et al.
patent: 4956687 (1990-09-01), de Bruin et al.

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