Image scanner for use in image forming apparatus

Details Image scanner for use in image forming apparatus Image scanner for use in image forming apparatus

2007-10-30

2007-10-30

Lee, Cheukfan (Department: 2625)

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

C358S497000, C358S475000, C358S474000, C382S274000, C399S207000

Reexamination Certificate

active

11177320

ABSTRACT:
In an image reading apparatus according to the present invention, a black reference plate used for shading correction includes a light shielding plate. When the light shielding plate shields an optical path leading to a CCD sensor, the light emitted from an illumination device is prevented from falling on the CCD sensor.

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patent: 5943141 (1999-08-01), Tamura
patent: 5970181 (1999-10-01), Ohtsu
patent: 6430378 (2002-08-01), Ozawa
patent: 6771397 (2004-08-01), Hashizume
patent: 05-031868 (1993-05-01), None
patent: 10-164362 (1998-06-01), None
patent: 11-205606 (1999-07-01), None

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