Patent ID: 8154576

Claim:
An image forming apparatus which performs exposure for “n” lines in one scan by scanning of “n” light rays from “n” light sources in a main scanning direction of an image carrier and drives the image carrier in a sub scanning direction that is orthogonal to the main scanning direction, where “n” is an integer greater than 1, the image forming apparatus comprising: a laser driving section which performs a light emission drive on the “n” light sources corresponding to image data, respectively; and a control section which, corresponding to density unevenness generated in an adjoining section of a nth exposure in a Nth scan and a first exposure in a N+1th scan, determines a correction value of exposure amount to resolve the density unevenness for the nth exposure amount in the Nth scan and the first exposure amount in the N+1th scan, where the first exposure locates most upstream and the nth exposure locates most downstream in the sub scanning direction in each scan on the image carrier, along with that, determines a correction value of each exposure amount for the “n” lines so that an absolute values of the correction value becomes gradually smaller, while reversing sign, as moving towards a middle of the “n” lines, based on the correction value of the first and nth exposure amounts, for the second to n−1th exposure amounts, and corrects each exposure amount of the “n” light sources from the laser driving section based on each correction value.