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:
May. 19, 1998
Filed:
Oct. 28, 1994
Applicant:
Inventors:
Kazuo Fujibayashi, Kawasaki, JP;
Takayuki Ishihara, Yokohama, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
355 45 ; 355 69 ; 399144 ;
Abstract
An apparatus for projecting an original image onto a screen or a photosensitive drum includes a controller for correcting a light amount of an original illumination lamp along a scanning direction of the original image. A light amount correction value of the controller is changed so that exposure amount distribution on a projected surface becomes a predetermined value in accordance with a magnification detected from a projection lens.