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:
Aug. 15, 2000
Filed:
Sep. 09, 1997
Tatsuya Yoshida, Fukuoka-ken, JP;
Tadayuki Kajiwara, Chikushino, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
In an image forming apparatus, even when the image forming positions of the plural light beams of the exposure optical system vary, there can be formed an image without any shifting between image forming positions. In response to a print reference signal from a timing controller, an output controller causes a storage to output image data of a first raster to a second temporary memory and image data of a second raster to a first temporary memory. The output controller supplies the second and first temporary memories with data output reference signals respectively indicating points of timing when a predetermined period of time lapses after each of the laser beams respectively of first and second exposing units enters a sensor disposed at a reference position. According to the output reference signals, the image data is outputted to the first and second exposing units such that an image is formed at timing corresponding to image forming positions of the laser beams.