(19)
(11) EP 1 593 516 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
23.12.2009 Bulletin 2009/52

(43) Date of publication A2:
09.11.2005 Bulletin 2005/45

(21) Application number: 05103216.7

(22) Date of filing: 21.04.2005
(51) International Patent Classification (IPC): 
B41J 2/165(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR
Designated Extension States:
AL BA HR LV MK YU

(30) Priority: 06.05.2004 EP 04076347

(71) Applicant: Océ-Technologies B.V.
5914 CC Venlo (NL)

(72) Inventors:
  • Faken, Henry
    5914 SH Venlo (NL)
  • Vestjens, Johannes C.G.
    5914 RP Venlo (NL)

(74) Representative: Vanoppen, Ronny R.J. et al
Océ-Technologies B.V. Corporate Patents Postbus 101
5900 MA Venlo
5900 MA Venlo (NL)

   


(54) Printing method with camouflage of defective print elements


(57) A printing method for a printer having a printhead with a plurality of print elements and capable of printing a binary pixel image, the method comprising the steps of:
a) locating defective print elements,
b) determining a camouflage area in the vicinity of pixels that would have to be printed with the defective print elements, and
c) camouflaging defective print elements by modifying image information in said camouflage area,
characterised in that the camouflaging step is incorporated in a halftoning step, in which error diffusion is used for creating said binary pixel image, and comprises a step (S104; S204) of modifying an error propagation scheme for the camouflage area.







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