LIGHT BEAM EXPOSURE DEVICE, ELECTRONIC EQUIPMENT INCLUDING LIGHT BEAM EXPOSURE DEVICE, AND OPERATION METHOD OF LIGHT BEAM EXPOSURE DEVICE

摘要

PROBLEM TO BE SOLVED: To suppress a change in a shape profile of an exposure area, which is attributable to a deviation of each exposing position, when plural light beams are radiated to plural exposing positions and each pixel of image data exhibits a luminance value of a three or more-valued gray level.SOLUTION: A light beam exposure device 20 includes a light emitting unit that generates plural light beams which are radiated to different exposing positions that are mutually adjacent along a sub-scan direction on an object, and sweeps the plural light beams in a main scan direction, and an image processing circuit 21 that corrects a luminance value of each of pixels of image data and transmits the resultant image data to the light emitting unit. Based on exposing position information representing a deviation of each of the exposing positions from each of reference positions equidistantly juxtaposed along the sub-scan direction on the object, the image processing circuit 21 corrects the luminance value of each of pixels associated with the respective exposing positions so as to suppress a change in a shape profile of an exposure area attributable to the deviation of each of the exposing positions. When the luminance value of a pixel that is an object of correction exceeds a maximum luminance value because of correction and a pixel adjoining the pixel that is an object of correction exhibits a minimum luminance value, the luminance value of the adjoining pixel is increased.SELECTED DRAWING: Figure 1