Printing apparatus and test pattern printing method
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United States of America Patent
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-
Sep 13, 2005
Grant Date -
Feb 19, 2004
app pub date -
Aug 8, 2003
filing date -
Aug 13, 2002
priority date (Note) -
In Force
status (Latency Note)
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Abstract
In a printing apparatus which prints by scanning a printhead having an array of printing elements on a printing medium in a direction crossing to a direction of the array, when a test pattern for verifying the printing characteristic of each printing element is to be printed, adjacent printing elements are driven in parallel to print a straight pattern with a predetermined length in the scanning direction. Printing of a straight pattern is executed a plurality of number of times so as to use all the printing elements for printing at least one straight pattern. In the printed test pattern, variations between the printing characteristics of printing elements that do not pose any problem in actual printing do not stand out. A printing element which degrades the image quality upon actual printing can be determined.
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