Printing apparatus and method for alternately performing preliminary discharge control of nozzles
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United States of America Patent
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Nov 17, 2009
Grant Date -
Jun 21, 2007
app pub date -
Dec 13, 2006
filing date -
Dec 14, 2005
priority date (Note) -
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status (Latency Note)
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Abstract
A printing apparatus uses a printhead, which has a first nozzle array and a second nozzle array, each having a plurality of nozzles with a first nozzle discharging a first amount of ink and a second nozzle away having a plurality of nozzles with a second nozzle discharging a second amount of the ink and including nozzles to be used for printing on a printing medium and nozzles not to be used for printing on the printing medium. The printing apparatus selects, from the first nozzle array and the second nozzle array, nozzles to be driven within a predetermined period. The printing apparatus controls preliminary discharge control to drive the nozzles to be used for printing and the nozzles not to be used for printing by alternatively selecting the first nozzles and the second nozzles.
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