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. 23, 2004
Filed:
Oct. 27, 2000
Brother Kogyo Kabushiki Kaisha, Nagoya, JP;
Abstract
In a multibeam scanner, a control unit includes a velocity detecting circuit detecting a conveying velocity V of a photosensitive body; a comparison circuit comparing the detected conveying velocity V to a reference conveying velocity V ; a light intensity control circuit a modulation circuit an LD control circuit and an LD control circuit The LD control circuit and LD control circuit issue drive signals to laser diodes LD and LD The laser diodes LD and LD emit laser beams LB and LB that are modulated according to image signals outputted from the modulation circuit The laser beams LB and LB are deflected by a polygon mirror onto the photosensitive body and perform a main scan over neighboring scanning lines SL and SL while the photosensitive drum is rotated. The light intensity from the laser diode LD is adjusted when the velocity of the photosensitive drum differs from a prescribed velocity in order to achieve a balanced image density.