Patent ID: 8411124
Filing Date: 2013-04-02
Classification: G06K

Abstract:
1. An optical writing device that forms an electrostatic latent image on a photosensitive element with a binary light source capable of controlling two statuses which are a switch on status and a switch off status, the device comprising: a pixel information acquiring unit that acquires multilevel pixel information in which one pixel is expressed in multilevel scales, the multilevel pixel information being information of each pixel for forming an image as the electrostatic latent image; a line pixel information storing unit that stores the acquired multilevel pixel information for each main scanning line; and a light emission control unit that optically exposes the photosensitive element by controlling the binary light source on the basis of the stored multilevel pixel information; wherein the light emission control unit exposes the photosensitive element with the binary light source with a period corresponding to N-fold in a sub scanning direction resolution of the stored multilevel pixel information, wherein N is a positive integer, so that the N times exposures corresponds to an exposure for one pixel in the original resolution, wherein the switch on status and the switch off status of the binary light source are controlled in the N times exposures with the binary light source for each pixel, on the basis of lighting rate information, the lighting rate information being for converting the multilevel scales into a lighting rate in the N times exposures.