Patent ID: 7471306
Filing Date: 2008-12-30
Classification: G03G,H04N

Abstract:
1. An optical scanning unit, comprising: a light source having a plurality of light emitting sources; a plurality of vibration mirror parts configured to reciprocatingly scan light beams emitted from the light emitting sources where a torsion bar is a rotational axis; and a recording control part configured to output image information for modulating the light emitting sources corresponding to a scan operation of the vibrating mirror parts, wherein recording data is divided for each light emitting source, and pixels in a single line to be recorded are divided into a pixel recorded by forward scanning and a pixel recorded by backward scanning, and a sub-scanning pitch d on a scanned surface scanned by the light emitting sources and a driving frequency f of the vibrating mirror parts are defined by the following formulas, namely and the number of the light emitting sources is n, a moving speed of a scanned surface against a scanning position or a moving speed of the scanning position against the scanned surface is v, and a line gap to be recorded is p.