Apparatus for reading an image

Facsimile and static presentation processing – Facsimile – Picture signal generator

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H04N 104

Patent

active

049549146

ABSTRACT:
An apparatus for reading an image from a document which comprises a light emitting means having a plurality of LEDs, a back plate disposed in the vicinity of a region in which the document is to be irradiated, an optical sensor, an adjust means which changes the output level of each LEDs, and a control means which controls the adjust means in such a manner that the output level of each of the LEDs is equal to each other, in response to the output signals of the optical sensor which are obtained from light beams reflected from the back plate when no document is in the region. In the apparatus, the document can be irradiated uniformly by the LEDs.

REFERENCES:
patent: 4408231 (1983-10-01), Bushaw et al.

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