Patent ID: 7677693

Claim:
An inkjet image forming apparatus, comprising: a printhead having one or more subheads each having one or more groups each including a plurality of nozzles and a printhead length corresponding to a width of a print medium; a driving unit to drive the plurality of nozzles of the one or more subheads to print an image; a first feeding path through which the print medium is guided to be fed to the printhead in a feeding direction; a second feeding path which is connected to the first feeding path and through which the print medium on which the image has been printed is guided to be again fed along the first feeding path; a path conversion guide unit disposed in a position where the first and second feeding paths intersect to guide the print medium to be discharged or fed along the second feeding path; a print medium feeding unit installed on the first and second feeding paths to feed the print medium along the first and second feeding paths; and a controller to synchronize operations of the driving unit, the path conversion guide unit, and the print medium feeding unit so that ink ejected from the one or more subheads is deposited on a desired portion of the print medium, and to generate a first control signal to control the driving unit to time-divisionally drive the one or more subheads and the one or more groups, wherein the controller drives time-divisionally the plurality of nozzles of the one or more subheads and the plurality of nozzles of the one or more groups in a same direction.