Image forming apparatus, optical scanning control method, optical scanning control program and recording medium

A control method and optical scanning technology, which are applied in the fields of image forming apparatuses and copiers, and can solve the problems of not considering the elimination of color shift and the like
CN101539739AInactive Publication Date: 2009-09-23RICOH KK
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
RICOH KK
Publication Date
2009-09-23
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to an image forming apparatus, an optical scanning control method, an optical scanning control program and a recording medium. The image forming apparatus is capable of forming multi-color images, and is equipped with an optical scanning device comprising a polygon mirror and a plurality of synchronous sensors (5). The lighting control of LD (4) is carried out by a CPU (1a), a lighting control portion (1b), and a LD driver (3), the polygon mirror deflects a plurality of light beams emergent from the LD (4) for scanning, and the light beam deflected by the polygon mirror is transmitted to a plurality of synchronous sensors (5) to output a synchronous signal (7-ST). The polygon mirror is driven in the regular speed. When the multi-color image is formed in a speed lower than the regular speed, a synchronous signal (SG4) is generated for removing one time in a determined interval in the same time by a synchronization portion (6) using a plurality of synchronous signals (7) output from a plurality of synchronous sensors (5), and the control portion (1) forms image according to the synchronous signal. Even a face shifting control is executed, sub-scanning direction will not deviate.
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Description

technical field

[0001] The present invention relates to image forming apparatuses such as copiers, printers, facsimile machines, and digital multi-functional peripherals incorporating the above-mentioned functions, which are provided with an optical scanning device that performs optical writing using a revolving polyhedron, and an optical scanning device and an optical scanning device implemented by the above-mentioned optical scanning device and the image forming apparatus. A scanning control method, a light scanning control program for a computer to implement the light scanning control method, and a recording medium recording the light scanning control program. Background technique

[0002] As such a technique, the invention disclosed in Patent Document 1 is known. The invention includes: a photoreceptor whose surface moves in a certain direction; a laser beam output means for outputting a laser beam modulated according to an image signal; The surface of the photoreceptor...

Claims

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