Patent ID: 6678295
Filing Date: 2004-01-13
Classification: H01S

Abstract:
A laser drive control apparatus for controlling a plurality of beam emitting points to emit a plurality of laser beams, respectively, to form scanning lines during a predetermined time period, the laser drive control apparatus comprising:a first control unit that controls a plurality of beam emitting points to emit a plurality of laser beams successively except during a predetermined time period; a photoreceptor that detects each of the laser beams emitted under the control of the first control unit, and generates a beam amount signal indicating a beam amount of the laser beam for each of the plurality of beam emitting points; a providing unit that provides a plurality of reference values corresponding to the plurality of beam emitting points, respectively, when the photoreceptor generates the beam amount signals; a comparison unit that compares the beam amount signals with the corresponding reference values, respectively; and a second control unit that controls, based on the comparison made by the comparison unit, the plurality of beam emitting points to emit the laser beams to form the scanning lines during the predetermined time period, wherein the plurality of reference values are set in the providing unit so that the plurality of reference values are interdependent with each other and the total sum of the reference values is a predetermined value, the providing unit includes a ratio unit that determines ratios among the plurality of reference values so that the total sum of the reference value is the predetermined value.