| 摘要 |
According to the invention, a laser drive control circuit in a multibeam scanner comprises a regulation unit that provides reference values for a plurality of beam emitting points, respectively. The reference values are adjusted so that the total sum of the reference values is a predetermined value. The laser drive control circuit controls the beam emitting points, successively, to emit laser beams except when scanning a photosensitive drum, and detects the respective beam amounts of laser beams. Then, the laser drive control circuit adjusts driving currents fed to the beam emitting points for scanning the photosensitive drum upon the comparison of the detected beam amounts and reference values, respectively.
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