Ink-jet printing method and apparatus

Details Ink-jet printing method and apparatus Ink-jet printing method and apparatus

2005-09-13

2005-09-13

Nguyen, Lamson (Department: 2861)

Incremental printing of symbolic information

Ink jet

Controller

C347S041000

Reexamination Certificate

active

06942310

ABSTRACT:
Printing is performed on a printing medium by using an ink-jet printhead for discharging ink, multilevel printing is performed by multipass printing operation of executing main scanning operation of moving the printhead relative to the printing medium with respect to each print area while changing the number of ink droplets discharged to each pixel, and the number of scans to be performed to discharge ink droplets used to print a pixel with a low gray level value is made larger than the number of scans to be performed to discharge ink droplets used only to print a pixel with a high gray level value, thereby preventing the occurrence of density irregularity and streaks in a low gray level portion and printing a high-quality image.

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