Ink jet recording apparatus and ink jet recording method
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United States of America Patent
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Apr 29, 2003
Issued Date -
N/A
app pub date -
Jul 31, 2000
filing date -
Jun 7, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A gray scale level data of each pixel is obtained as data taking 5 levels between 0 and 4 corresponding to the number of ejections from 4 individual discharging portions by the pseudo-halftoning processing. The pointer directs sequentially the memories every time an ejection data is set in responsive to the 5 level data. As a result, in forming a plurality of pixels sequentially, 4 individual discharging portions are used sequentially. So far, it will be appreciated that even if ejection failures occur in either of a plurality of discharging portions of the ink jet recording head, relatively high-quality recorded images are obtained and the lifetime of the recording head can be increased.
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