Page-wide array printing
AssigneeHewlett-Packard Development Company, L.P.
InventorsMarcos Casaldaliga Albisu, M. Isabel Borell Bayona, Leticia Rubio
Life of this patent
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Abstract
A method in a page-wide array printing apparatus comprising at least first and second printing dies that overlap in a page width direction comprises the steps of calibrating the printing apparatus in a media advance direction to a higher resolution than the page width direction, the media advance direction being perpendicular to the page width direction, and using printing masks to control the operation of a plurality of nozzles in an overlap area between the first and second printing dies to reduce any visible defects caused by dot placement errors in the page width direction.
Claims20
A method in a printing apparatus comprising a first and second printing dies that overlap in a page width direction, the method comprising:
- calibrating the printing apparatus both in a media advance direction and a page width direction, the printing apparatus calibrated in the media advance direction to a higher resolution than in the page width direction, the media advance direction being perpendicular to the page width direction;
- and
- using printing masks to control the operation of a plurality of nozzles in an overlap area between the first and second printing dies to reduce any visible defects caused by dot placement errors in the page width direction.
A page-wide array printing apparatus comprising:
- a first and second printing dies that overlap in a page width direction, wherein the first and second printing dies comprise a plurality of printing nozzles in an overlap area of the first and second printing dies;
- a control unit to control the operation of the plurality of nozzles in the overlap area using a printing mask that reduces any visible defects caused by dot placement errors in the page width direction;
- wherein the printing apparatus is calibrated in a page width direction perpendicular to a media advance direction, using a complementary pair of random split weaving masks, each mask having columns corresponding to overlapping nozzle pairs along the page width direction and rows corresponding to swath height along the media advance direction, including a complementary pair of split weaving masks,
- wherein for each column:
- one of the random split weaving masks controls which nozzles of the overlapping nozzle pairs of the column are fired for a limited number of adjacent rows of the column beginning at a beginning or end row of the rows, and
- another of the random split weaving masks controls which nozzles of the overlapping nozzle pairs of the column are fired for the rows of the column other than the limited number of adjacent rows.
A print apparatus comprising:
- a printhead having a first and second dies that overlap in a page width direction, wherein the first and second dies comprise a plurality of nozzles in an overlap area of the first and second dies;
- a controller to:
- calibrate the print apparatus both in a media advance direction and in a page width direction, the printing apparatus calibrated in the media advance direction to a higher resolution than in the page width direction, the media advance direction being perpendicular to the page width direction;
- and
- control the operation of the plurality of nozzles in the overlap area to mask visible defects caused by dot placement errors in the page width direction.
Dependencies are inferred from the claim text.