Ink detection device and procedure capable of preventing ink contamination by dilution of ink points

摘要

To prevent an ink blurring on the recording medium, the ink jet recording apparatus for ejecting ink droplets onto the recording medium to record an image includes a plurality of recording heads (611), each having a plurality of ejecting ports and ejecting different inks; data storage means (607) for storing printing data and non printing data for each of the recording heads; boundary detecting means (608) for detecting a boundary between the printing data and the non printing data of one of the recording heads in accordance with the printing data stored in the storage means (607); judging means for judging whether printing data of other heads continues for more than a predetermined number of dots at the boundary detected by the boundary detecting means; and thinning means for converting some of the printing data of the other heads to non printing data when the judging means determines that the printing data of the other heads continues for more than the predetermined number of dots. IMAGE