Array type inkjet printer with multi-pass structure and...

Incremental printing of symbolic information – Ink jet – Controller

Reexamination Certificate

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C347S041000

Reexamination Certificate

active

07407249

ABSTRACT:
An array type inkjet printer with a multi pass structure and a method of compensating an irregular nozzle defect thereof. The array type inkjet printer includes a scattering portion that is configured to provide a nozzle selection pattern in which a plurality of ink dots per color is arranged in a zigzag shape over a predetermined ink scattering area. The scattering portion is also configured to select a dimension of the ink scattering area along which the dots are arranged in the zigzag shape on the basis of resolution selected for printing of printing data. The inkjet printer further includes a head controller that is configured to control discharge of ink from a nozzle according to the zigzag arrangement of the dots in the nozzle selection pattern. The inkjet printer further includes a dispersion portion that is configured to modify the nozzle selection pattern by randomly rearranging the dots arranged in the zigzag shape by the scattering portion prior to dispersion of the dots over the ink scattering area. Thus, an irregular defect in a nozzle can be compensated.

REFERENCES:
patent: 2001/0017638 (2001-08-01), Otsuki
patent: 2002/0180833 (2002-12-01), Castano et al.

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