Gray scale pattern and recording method and recording apparatus employing the gray scale pattern
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United States of America Patent
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Dec 2, 2003
Grant Date -
Feb 28, 2002
app pub date -
Dec 28, 1994
filing date -
Dec 28, 1993
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention is designed to make uniform frequencies with which individual recording elements of a multihead are used in a recording apparatus for performing gray scale recording by controlling a number of dots recorded in a unit area. A gray scale pattern used to display gray scale is a pattern in which a plurality of blocks each comprising a dot concentration type gray scale pattern having a size smaller than that of the gray scale pattern is dispersed. The maximum difference between numbers of times the recording elements in the range of the gray scale pattern are used can be restricted within twice, and individual nozzles can be used uniformly. Consequently, imbalance of changes in the recording elements with time, caused by the differences between the frequencies with which the recording elements are used, can be restricted, thus restricting irregularities on an image.
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