Patent ID: 8297730

Claim:
A liquid discharge apparatus including a liquid discharge head having a liquid discharge unit for discharging droplets, and liquid discharge head control means for controlling the liquid discharge head to discharge droplet from the liquid discharge unit onto recording medium surface, wherein the liquid discharge head includes plural ones of the liquid discharge units in a direction perpendicular to movement of a recording medium where the recording medium is relatively moved with respect to the liquid discharge head; and wherein the liquid discharge head control means serves to allow discharge timings of the droplet to be different every one pixel in the movement direction of the recording medium, wherein the control means alters discharge timings for ink ejection are shifted in the print feed direction only when a shift in nominal pixel generation is likely to result in conspicuous erroneous pattern, the discharge timing being shifted so that adjacent pixels in a print feed direction are caused to overlap thereby eliminating the potential for a visible line in the printed image, and further wherein recorded data is used by the control means in order to eliminate undesired stripes by altering discharge timings and further wherein dots of even pixels and dots of odd pixels are selectively connected based upon the recorded data in order to eliminate the undesired stripes.