The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 04, 2000
Filed:
Oct. 16, 1997
Applicant:
Inventors:
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
358509 ; 358505 ;
Abstract
In an image forming apparatus, plural LED light sources are provided for emitting lights of respectively different wavelengths, and, in reading an illuminated image with a reading sensor, a lighting mode setting register selects a first mode for reading the image with a single color or a second mode for reading the image with plural colors. The light emitting time of these light sources are set by a light emitting time control register, a light emitting time counter and an automatic light emitting time adjustment circuit, and the currents supplied to the light sources are set by a lighting current control circuit. A CPU controls these circuits according to the selected mode.