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:
Mar. 24, 2009
Filed:
Oct. 25, 2006
Yoshio Kanzaki, Ohta-ku, JP;
Hidetoshi Kanai, Yokohama, JP;
Katsuhiko Maeda, Kawasaki, JP;
Shinya Tanaka, Setagaya-ku, JP;
Yoshio Kanzaki, Ohta-ku, JP;
Hidetoshi Kanai, Yokohama, JP;
Katsuhiko Maeda, Kawasaki, JP;
Shinya Tanaka, Setagaya-ku, JP;
Ricoh Company Ltd., Tokyo, JP;
Abstract
An image forming apparatus capable of properly performing an initialization of a control circuit including a laser diode driver circuit, includes a light source, a photoreceptor, a deflector, and a controller. The photoreceptor is built in the light source to detect incident light. The deflector deflects the laser light into a scanning laser beam. The controller controls the light source to light on and off, and obtains a laser light emission amount of the light source relative to a current flowing through the light source based on a detection of incident light by the photoreceptor. The controller determines the laser light emission amount of the light source during a time period when a path of the laser light from the light source is headed to a reflection surface of the deflector at an incident angle of approximately ninety degrees.