Correcting variations in ink discharge velocity in a printer by printing a test pattern and adjusting a printing position shift
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United States of America Patent
Stats
-
Dec 30, 2003
Grant Date -
Mar 14, 2002
app pub date -
Dec 23, 1998
filing date -
Dec 24, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A correction method for determining a correction amount for correcting a printing position shift based on ink discharge velocity in a printer. The printer prints a plurality of identical adjustment patterns while changing the printhead scanning speed by a predetermined amount. The plurality of printed patterns are visually compared, a pattern with the highest quality is selected, and the selection result is designated to the printer through a host. In accordance with the designation, the printer stores a velocity of discharging an ink from the printhead, which is necessary for printing the selected pattern, in a non-volatile memory (NVRAM). After this, the correction amount for correcting the printing position shift is calculated on the basis of the stored ink discharge velocity, and printing is performed while correcting the printing potion shift using the correction amount.
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