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Patent Searching and Data


Title:
IMAGE-FORMING APPARATUS
Document Type and Number:
WIPO Patent Application WO/2015/098496
Kind Code:
A1
Abstract:
Provided is an image-forming apparatus that limits reductions in image quality such as streaking even when print element discharge failure occurs in the overlap region (ab) of short heads (150A, 150B) that configure a long head. In the overlap region (ab), among multiple overlap areas (R1, R2, R3) configured from rows of consecutive print elements that do not comprise print elements that have been specified as discharge failure print elements (N1, N2), the overlap area (R2) with the largest number of overlapping print elements is specified. When the number of print elements in said overlap area (R2) is greater than a fixed number (Z), an overlap control for gradually changing the discharge apportionment for the fixed number (Z) of print elements in each short head (150A, 150B) is performed. Since the discharge failure of the print element (N1) is present in an area in which the short head (150A) print apportionment is 100%, the discharge failure is supplemented by, for example, increasing the discharge amounts of the adjacent print elements (a07, a09). But because the discharge failure of the print element (N2) is present in an area in which the short head (150B) print apportionment is 0%, supplementation is not performed.

Inventors:
HIRAMOTO KENICHIROU (JP)
Application Number:
PCT/JP2014/082522
Publication Date:
July 02, 2015
Filing Date:
December 09, 2014
Export Citation:
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Assignee:
KONICA MINOLTA INC (JP)
International Classes:
B41J2/01; B41J2/155; B41J2/205
Domestic Patent References:
WO2009150945A12009-12-17
Foreign References:
JP2012006267A2012-01-12
JP2011255594A2011-12-22
JP2005059402A2005-03-10
JP2012131110A2012-07-12
JP2007253483A2007-10-04
JP2011255594A2011-12-22
Other References:
See also references of EP 3088182A4
Attorney, Agent or Firm:
KOYO INTERNATIONAL PATENT FIRM (JP)
Patent business corporation Mitsuaki international patent firm (JP)
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