Image reading apparatus and image forming apparatus provided with same

The invention relates to an image reading apparatus and an image forming apparatus provided with same. In one embodiment, in a state in which a first scanning unit is positioned at a reading position below an original reading glass and a second scanning unit is positioned such that an original is no...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
1. Verfasser:	NISHIO YUKIHITO
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	CINEMATOGRAPHY ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY ELECTROGRAPHY ELECTROPHOTOGRAPHY HOLOGRAPHY MAGNETOGRAPHY PHOTOGRAPHY PHYSICS PICTORIAL COMMUNICATION, e.g. TELEVISION
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	The invention relates to an image reading apparatus and an image forming apparatus provided with same. In one embodiment, in a state in which a first scanning unit is positioned at a reading position below an original reading glass and a second scanning unit is positioned such that an original is not caused to travel between the original reading glass and a reading guide plate of a first reading portion, control is performed to selectively turn on or turn off each LED of an illumination portion of the first scanning unit to produce a shadow of paper dust, and detection is performed on variation in an output of a CCD corresponding to the shadow of the paper dust.