Patent ID: 8270026

Claim:
A light source driving device for use in an optical scanning device, the optical scanning device including a plurality of light emitting sections arranged at different positions with respect to at least a direction corresponding to a plurality of scanning lines and each of which operates based on a drive signal, and a scanning section that performs scanning by moving a plurality of light spots, formed on a surface to be scanned by a plurality of light beams emitted from the light emitting sections and propagated through an optical system, along the scanning lines in a main scanning direction, the light source driving device comprising: a write signal generating circuit that generates write signals based on image information, number of the write signals being equal to number of the light emitting sections; a drive signal generating circuit that is configured to generate, from the write signals, a first plurality of drive signals and a second plurality of drive signals, and a circuit for causing the drive signal generating circuit to generate one of the first and second plurality of drive signals based on at least one of a) a relationship between an arrangement of the light emitting sections and an arrangement of the light spots, and b) a relationship between the surface and the main scanning direction; and a drive circuit that outputs the drive signals to the light emitting sections in the optical scanning device to drive the light emitting sections.