Patent ID: 8144177

Claim:
An image formation apparatus which causes a laser source to irradiate laser light based on input image data, forms an electrostatic latent image on a photosensitive member by exposing the photosensitive member with the laser light, and forms an image by developing the electrostatic latent image, said image formation apparatus comprising: a control unit adapted to: (a) calculate, based on the input image data, a pre-correction continuous OFF time of the laser source between a preceding pixel and a subsequent pixel in the input image data, the input image data indicating that the preceding pixel is a last pixel to be formed by the laser source before the laser source is to form the subsequent pixel, and the pre-correction continuous OFF time beginning when the laser source is to switch from ON to OFF according to the input image data to conclude formation of the preceding pixel and ending at an initial ON time that occurs when the laser source is to switch from OFF to ON to form the subsequent pixel according to the input image data, and (b) correct the initial ON time by shifting the initial ON time earlier by an amount proportional to a duration of the calculated pre-correction continuous OFF time, wherein the control unit is adapted to generate corrected image data from the input image data at least by performing (a) and (b) for multiple pixel pairs in the input image data, the corrected image data including multiple of the corrected initial ON times respectively corresponding to the multiple pixel pairs.