Printing apparatus and processing method thereof
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United States of America Patent
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Sep 30, 2014
Grant Date -
Apr 25, 2013
app pub date -
Oct 9, 2012
filing date -
Oct 20, 2011
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A printing apparatus includes a printhead configured to array a nozzle array in which a plurality of nozzles for discharging ink are arrayed in the first direction, a reading unit configured to read, as a plurality of luminance values aligned in a nozzle arrayed direction, an inspection pattern formed by discharging ink from the plurality of nozzles of the printhead, a calculation unit configured to calculate a plurality of difference values each by calculating a difference between two luminance values spaced apart by a predetermined number of luminance values, and an analysis unit configured to analyze an ink discharge state in the plurality of nozzles based on the plurality of difference values.
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