Patent ID: 7625065

Claim:
An ink jet print head that can eject a first ink and a second ink of a color which is different from a color of the first ink to a print medium while scanning the print medium in a first direction, the ink jet print head comprising: a first orifice group in which orifices having a first diameter for ejecting the first ink are arranged at a predetermined pitch in a second direction crossing the first direction; a second orifice group in which orifices having a second diameter for ejecting the first ink are arranged at the predetermined pitch in the second direction, the second diameter being smaller than the first diameter; a third orifice group in which orifices having a third diameter for ejecting the first ink are arranged at the predetermined pitch in the second direction, the third diameter being smaller than the second diameter; a fourth orifice group in which orifices having the first diameter for ejecting the first ink are arranged at the predetermined pitch in the second direction, the fourth orifice group being different from the first orifice group; and a fifth orifice group in which orifices for ejecting a second ink are arranged in the second direction; wherein the first orifice group, the second orifice group, the fifth orifice group, the third orifice group and the fourth orifice group are arranged along the first direction in this order, and wherein each of the orifices of the first, second, third and fourth orifice groups is arranged at positions shifted in the second direction.