Line image sensor with controlled photosensitivity

Details Line image sensor with controlled photosensitivity Line image sensor with controlled photosensitivity

1989-08-15

1991-02-26

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

2502081, H01J 4014

Patent

active

049964380

ABSTRACT:
A photoelectric transfer element of which a reading sensor for reading written materials such as facsimile documents has a controlled photosensitive region within the photoelectric transfer element. Thus photosensitivity in a region of the photoelectric transfer element is reduced to improve element performance. The specific photosensitivity control methods include an electric field control, increased impurity concentration, and irradiation ultraviolet light.

REFERENCES:
patent: 4659984 (1987-03-01), Furushima et al.
patent: 4887166 (1989-12-01), Kakinuma et al.
patent: 4916306 (1990-04-01), Heidtmann et al.
Nishiguchi et al., "Where Are We Now With Amorphous Silicon Devices", May 1985, pp. 53-56.

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