Method of calibrating print alignment error
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United States of America Patent
Stats
-
Jan 20, 2009
Grant Date -
Aug 19, 2004
app pub date -
Jan 20, 2004
filing date -
Feb 14, 2003
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A print alignment error between a first printhead of a first ink cartridge and a second printhead of a second ink cartridge installed in an inkjet printer is calibrated by printing preset test patterns on a paper according to an input correction signal using the first and second printheads, scanning the printed test patterns, measuring positions of a starting point and an end point of each of the scanned test patterns, calculating a horizontal print alignment error between the first and second printheads from the starting points, calculating a vertical print alignment error between the first and second printheads from the starting points and the end points, and calibrating the calculated horizontal and vertical print alignment errors.
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