Method and apparatus for reducing misalignment of print on printhead
AssigneeIndustrial Technology Research Institute
InventorsHsiang-Pei Ou, Chieh-Yi Huang
Life of this patent
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Abstract
A print alignment method comprises detecting a skew direction of the printhead, receiving column data, corresponding to columns of printhead nozzles, dividing column data into N sections, selecting individual N column data, when the skew is to the right, the printhead receives the first section of first column data, the second section of second column data, the third section of third column data and so on; and when the skew direction is to the left, the printhead receives the Nth section of the first column data, the (N-1)th section of the second column data, the (N-2)th section of the third column data, and so on.
Claims24
A print alignment method for a printhead, comprising:
- detecting a skew direction of the printhead;
- receiving column data corresponding to a plurality of printhead nozzle columns;
- dividing column data into N sections;
- selecting corresponding N column data;
- wherein, when the skew direction is to the right, the printhead receiving the first section of first column data, the second section of second column data, the third section of third column and so on to print;
- and
- when the skew direction is to the left, the printhead receives the Nth section of the first column data, the (N-1)th section of the second column data, the (N-2)th section of the third column data, and so on to print.
A print alignment method for a printhead, comprising:
- detecting a skew direction of the printhead;
- receiving column data corresponding to a plurality of printhead nozzle columns;
- dividing column data into N sections;
- wherein, when the skew direction is to the left, the printhead receives and prints the first section of the column data and then receives and prints the second section of the column data and so on in a print period(tp);
- and
- when the skew direction is to the right, the printhead receives and prints the Nth section of the column data and then receives and prints the (N-1)th section of the column data and so on in a print period(tp).
A print alignment system for a printhead, comprising:
- a print module receiving print data and translating it into column data, corresponding to a plurality of printhead nozzle columns;
- a compensation module receiving a test pattern and outputting compensation data, wherein the compensation data comprises a skew direction and a displacement offset;
- a compensation print module executing a print alignment procedure in accordance with the column data and the compensation data, comprising:
- dividing column data into N sections;
- selecting corresponding N column data;
- wherein, when the skew direction is to the right, the printhead receiving the first section of first column data, the second section of second column data, the third section of third column and so on to print;
- and
- when the skew direction is to the left, the printhead receives the Nth section of the first column data, the (N-1)th section of the second column data, the (N-2)th section of the third column data, and so on to print.
A print alignment system for a printhead, comprising:
- a print module receiving print data and translating it into column data, corresponding to a plurality of printhead nozzle columns;
- a compensation module receiving a test pattern and outputting compensation data, wherein the compensation data comprises a skew direction and a displacement offset;
- a compensation print module executing a print alignment procedure in accordance with the column data and the compensation data, comprising:
- dividing column data into N sections;
- wherein, when the skew direction is to the left, the printhead receives and prints the first section of the column data and then receives and prints the second section of the column data and so on in a print period(tp);
- and
- when the skew direction is to the right, the printhead receives and prints the Nth section of the column data and then receives and prints the (N-1)th section of the column data and so on in a print period(tp).
Dependencies are inferred from the claim text.