Patent ID: 8233016
Filing Date: 2012-07-31
Classification: B41J

Abstract:
1. An image forming apparatus, comprising an image carrier; an exposure device which performs exposure for forming a toner image on a surface of the image carrier and has at least a first exposure light source and a second exposure light source; a sensor for detecting densities or potentials of a first set of specified patterns, which are formed on the image carrier at a specified time with use of the first exposure light source at a plurality of levels of intensity, and a second set of specified patterns, which are formed on the image carrier at the specified time with use of the second exposure light source at a plurality of levels of intensity; a storing unit for storing respective relationships of the detected densities or potentials with the levels of intensity of the first exposure light source and the levels of intensity of the second exposure light source, which form a correlation between the first and second exposure light sources; and a controller for controlling intensity of the first and second exposure light sources based on the correlation.