Ink-jet printing head and ink-jet printing apparatus and method

摘要

The present invention provides an ink-jet printing head, and an ink-jet printing apparatus and method which enable high-gradation and high-quality images to be printed using dots of different sizes. In an ink-jet printing head according to the present invention, at least one second nozzle has its center arranged on an imaginary line extending in a main-scanning direction of the printing head through the center of a first nozzle. The volume of an ink droplet ejected through the second nozzle is smaller than that of an ink droplet ejected through the first nozzle. Further, the number of second nozzles is larger than that of first nozzles.