Ink-jet printer and printing head driving method therefor
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 27, 2002
Grant Date -
N/A
app pub date -
Jun 29, 2000
filing date -
Jul 2, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An ink-jet printer for printing by scanning a printing head having a plurality of nozzles arranged in a predetermined direction, each designed to discharge an ink droplet (100), over a printing medium in a direction substantially perpendicular to the array direction of the nozzles includes a driving means for time-divisionally driving the nozzles in accordance with driving signals (300) with timings of a plurality of blocks. When multipass printing is performed by scanning different nozzles over each printing area a plurality of times, the driving means drives nozzles used to print the same raster at timings of at least two different blocks. This makes it possible to reduce density unevenness of a printed image due to periodic ink pressure variations.
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