Ink jet recording apparatus and method capable of preventing ink blurring by thinning ink dots

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, each having a plurality of ejecting ports and ejecting different inks; a data storage device for storing printing data and non-printing data for each of the recording heads; a boundary detector 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 device; and a judging an adjusting device for judging whether printing data of other heads continues for more than a predetermined number of dots at the boundary detected by the boundary detector; and a thinning device 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.