Image reading apparatus containing light receiving transistors a

Details Image reading apparatus containing light receiving transistors a Image reading apparatus containing light receiving transistors a

1997-07-10

1999-11-23

Bella, Matthew C.

Image analysis

Image sensing

382124, 2502081, 250214B, G06K 700, H01J 4014

Patent

active

059914670

ABSTRACT:
An inexpensive, miniaturized and thin image reading apparatus reads various types of images, such as fingerprints. The apparatus includes a transparent substrate. A light-emitting unit emits light to pass through the transparent substrate and to be applied to a subject pressed against the substrate. A plurality of light-receiving units are disposed on the substrate in the vertical and horizontal directions with intervals therebetween and receive the light which is emitted from the light-emitting unit and is reflected from the subject. A reading device reads an image of the subject in accordance with the amount of light received by the light-receiving units.

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"Two-Dimensional Contact-Type Image Sensor Using Amorphous Silicon Photo-Transistor," Muneaki Yamaguchi, et al, Japan J. Appl Phys., vol. 32 (1993) pp. 458 and 460.
"Amorphous Silicon Two Dimensional Image Sensor Arrays," R.A. Street, X.D. Wu, et al. Xerox Palo Alto Research Center, Palo Alto, Ca. 94304, USA, pp. 96-99.

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