Abstract: An inkjet image forming apparatus and a method of performing a high resolution printing using multiple passes. In the inkjet image forming apparatus and a method of performing a high resolution printing, it is possible to obtain a resolution that is higher than an actual resolution of a print head by performing a printing operation several times on a printing medium in a multi-pass type printing method while moving the print head along a length direction thereof. As a result, printing quality can be improved by minimizing visibility of missing dots that occur due to failed nozzles.

Abstract: An inkjet image forming apparatus includes an ink detection unit including a light-receiving unit and a light-emitting unit facing each other. The ink detection unit is located under a printer head including several nozzles discharging the ink. The controller transmits an enable signal to the ink detection unit, so that the ink is detected by the enable signal while ink droplets enter and pass the optical signal. The ink detection unit alternately performs a first operation to detect the ink by the enable signal and a second operation to non-detect the ink.

Abstract: An inkjet image forming apparatus and a method of performing a high resolution printing using multiple passes. In the inkjet image forming apparatus and a method of performing a high resolution printing, it is possible to obtain a resolution that is higher than an actual resolution of a print head by performing a printing operation several times on a printing medium in a multi-pass type printing method while moving the print head along a length direction thereof. As a result, printing quality can be improved by minimizing visibility of missing dots that occur due to failed nozzles.