EP 3957484 A1 20220223 - STREAKINESS REDUCTION IN INKJET PRINTING
Title (en)
STREAKINESS REDUCTION IN INKJET PRINTING
Title (de)
VERMINDERUNG DER STREIFIGKEIT BEIM TINTENSTRAHLDRUCK
Title (fr)
RÉDUCTION DE L'EFFET DE STRIAGE DANS L'IMPRESSION PAR JET D'ENCRE
Publication
Application
Priority
EP 20191708 A 20200819
Abstract (en)
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.
IPC 8 full level
B41J 2/165 (2006.01); B41J 2/21 (2006.01); B41J 29/393 (2006.01)
CPC (source: EP)
B41J 2/2132 (2013.01); B41J 2/2139 (2013.01); B41J 2/2142 (2013.01); B41J 2/2146 (2013.01); B41J 29/393 (2013.01); B41J 2029/3935 (2013.01)
Citation (search report)
- [A] US 2010207983 A1 20100819 - SASAYAMA HIROYUKI [JP]
- [A] US 2018162134 A1 20180614 - GEISSLER WOLFGANG [DE], et al
- [A] US 2014232772 A1 20140821 - SASAKI HIROTAKE [JP], et al
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
DOCDB simple family (application)
EP 20191708 A 20200819