Printing apparatus and method for printing using a plurality of inks having different densities
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United States of America Patent
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Sep 3, 2002
Grant Date -
N/A
app pub date -
Jun 24, 1999
filing date -
Jun 29, 1998
priority date (Note) -
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status (Latency Note)
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Abstract
A printing method and printing apparatus capable of printing a high-quality image representing excellent tonality even when a plurality of inks having the same color and different densities are adhered to the substantially same pixel position on a printing medium to form one print dot and represent tonality. When printing is to be performed on a printing medium by discharging ink from an inkjet printhead using a plurality of inks having different densities, this apparatus calculates a lapse time from previous ink discharge, predicts a density change according to the lapse time based on the calculated lapse time, selects an ink and ink discharge amount suitable for representing a density value indicated by input multi-valued image data based on the predicted density change of ink, and drives the printhead so as to cause ink discharge from the printhead based on the selected ink and ink discharge amount.
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