Method and apparatus to reduce the effect of inkjet drop satellites in bi-directional multi-pass printing
AssigneeHewlett-Packard Development Company, L.P.
InventorsIgor Yakubov, Matty Litvak, Yosi Kaplan
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Abstract
A printing system and a method for printing in a multi-pass, bi-directional mode is provided. The method includes printing some boundary portions of an image in a first print-direction such that a non-printed area is traversed before a printed area and printing other boundary portions of the image in the opposite print-direction.
Claims12
A method for printing in a multi-pass, bi-directional mode, the method comprising:
- detecting the first boundary portion based on digital data of the image;
- determining the first direction based on image data of said first boundary portion:
- printing a first boundary portion of an image on a print-medium by traversing a print head across the print-medium in a first direction such that a non-printed area is traversed before a printed area;
- and
- printing on the print-medium an inner portion of the image by traversing the print head across the print-medium in both the first direction and a second direction opposite the first direction.
A method for printing in a multi-pass, bi-directional mode, the method comprising:
- detecting a boundary between two areas of an image based on digital data of the image;
- determining a print-direction of the boundary based on image data of said areas.
A method for printing in a multi-pass, bi-directional mode, the method comprising:
- traversing a print head in a first direction across a print-medium while selectively ejecting droplets of ink onto a first portion of said print-medium to print a first impression of an inner portion of an image and onto a second portion of said print-medium to print a boundary portion of said image;
- and
- traversing the print head in a second direction, opposite the first direction, across the print-medium while selectively ejecting droplets of ink onto the first portion of said print medium to print a second impression of the inner portion of the image without printing onto the second portion of the print-medium, wherein the boundary portion is associated with a boundary between areas of different color and traversing the print head in the first direction comprises traversing the second portion such that a first color area is traversed prior to a second color area of the boundary without ejecting droplets of ink corresponding to the first color.
An inkjet printing system comprising:
- a controller to detect a boundary between two areas of an image based on digital data of the image and to determine a print-direction of the boundary based on image data of said areas;
- and
- a bi-directional print head coupled to said controller to print on a print-medium a portion associated with the boundary while traversing the print-medium in the print-direction.
Dependencies are inferred from the claim text.