Patent ID: 7591521
Filing Date: 2009-09-22
Classification: B41J

Abstract:
1. An image forming apparatus provided with a recording head obtained by overlapping and disposing a plurality of short recording heads with a nozzle array of ink-jet nozzles arrayed in one direction, wherein the ink-jet nozzles of adjacent ones of the short recording heads overlap each other, said image forming apparatus comprising: an overlap correction control unit for controlling drive of the ink-jet nozzles according to a phase difference in an ink-jet nozzle position between the overlapped short recording heads to correct an optical density of an image formed on an overlapped part of the recording heads; an optical density characteristic correction control unit for controlling drive of the ink-jet nozzles according to a recording optical density characteristic of the nozzle array independently of the overlap correction control unit; and a control unit for controlling the overlap correction control unit to operate after the optical density characteristic correction control unit performs correction according to the recording optical density characteristic of the nozzle array.