Verminderung der Streifigkeit Beim Tintenstrahldruck

Details

Veröffentlichungs-Nr.

EP3957484

Aktenzeichen

EP20191708

Anmeldetag

19. August 2020

Veröffentlichung

11. Oktober 2023

Erteilung

11. Oktober 2023

Rechtsraum

EP

IPC

B41J2/165B41J2/21B41J29/393

Abstract

A method for reducing streakiness in inkjet prints is disclosed. The printer comprises a page-wide array of ink jetting units, that apply ink drops on a receiving medium in accordance with an input image. The method comprises a number of steps, wherein a first optical density profile across the width of the array is determined for a first input image that comprises uniform test patterns of various density levels and a second optical density profile for a second input image wherein a number of jetting units are intentionally blocked. A comparison of two profiles yields an effect of a blocked ink jetting unit. Using this effect a correction table for the density associated with each jetting unit is composed and an input image is printed after processing an array of pixels associated with a particular ink jetting unit with the corresponding correction factor.

Anmelder

Firma

Canon Kabushiki Kaisha

Land

🇯🇵 Japan

Fachgebiete