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. 10, 2009
Filed:
Sep. 12, 2005
Norio Joichi, Kokubunji, JP;
Atsushi Takahashi, Akishima, JP;
Youbao Peng, Hino, JP;
Yoshihito Sasamoto, Hachioji, JP;
Yoshiki Katayama, Hachioji, JP;
Takashi Nara, Niiza, JP;
Norio Joichi, Kokubunji, JP;
Atsushi Takahashi, Akishima, JP;
Youbao Peng, Hino, JP;
Yoshihito Sasamoto, Hachioji, JP;
Yoshiki Katayama, Hachioji, JP;
Takashi Nara, Niiza, JP;
Konica Minolta Business Technologies, Inc., Tokyo, JP;
Abstract
An image forming apparatus includes a photoreceptor member; a LED head that includes a plurality of light emitting diodes arrayed in a line along a rotating axial direction of said photoreceptor member and that is modulated in response to image signals, so as to expose said photoreceptor member while said photoreceptor member is rotating; a deviation detecting sensor to detect deviations on a circumferential surface of said photoreceptor member; a filter to extract low frequency components including a rotational frequency component of said photoreceptor member from deviation signals detected by said deviation detecting sensor, so as to acquire deviation information with respect to said circumferential surface of said photoreceptor member; a driving section to move said LED head back and forth against said circumferential surface of said photoreceptor member; and a position controlling section to control said driving section, based on said deviation information acquired by said filter, so as to keep a distance between said LED head and said circumferential surface of said photoreceptor member constant.