Pagewidth inkjet printer having composite image printing control
First Claim
1. A printer comprising:
- a pagewidth inkjet printhead for printing bi-level dots of ink onto print media at a resolution of 800 to 1600 dpi; and
at least one controller for controlling the pagewidth inkjet printhead, the, or each, controller comprising;
a receiver for receiving compressed page data to be printed by the printhead;
a first decoder configured to decode any compressed continuous tone image planes in the received compressed page data at a resolution of up to 320 ppi in each plane;
a second decoder configured to decode any compressed bi-level image planes in the received compressed page data at a resolution of 320 to 1600 dpi in each plane;
a half-toner/compositor for creating a composite image by halftoning the continuous tone image planes decoded by the first decoder and compositing the bi-level image planes decoded by the second decoder over the halftoned continuous tone image planes; and
a printhead driver arranged to output the composite image to the printhead.
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Accused Products
Abstract
A printer is provided comprising a pagewidth inkjet printhead for printing bi-level dots of ink onto print media at a resolution of 800 to 1600 dpi and a controller for controlling the pagewidth inkjet printhead. The controller comprises a receiver for receiving compressed page data to be printed by the printhead, a first decoder configured to decode any compressed continuous tone image planes in the received compressed page data at a resolution of up to 320 ppi in each plane, a second decoder configured to decode any compressed bi-level image planes in the received compressed page data at a resolution of 320 to 1600 dpi in each plane, a half-toner/compositor for creating a composite image by halftoning the decoded continuous tone image planes and compositing the decoded bi-level image planes over the halftoned continuous tone image planes, and a printhead driver arranged to output the composite image to the printhead.
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Citations
10 Claims
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1. A printer comprising:
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a pagewidth inkjet printhead for printing bi-level dots of ink onto print media at a resolution of 800 to 1600 dpi; and at least one controller for controlling the pagewidth inkjet printhead, the, or each, controller comprising; a receiver for receiving compressed page data to be printed by the printhead; a first decoder configured to decode any compressed continuous tone image planes in the received compressed page data at a resolution of up to 320 ppi in each plane; a second decoder configured to decode any compressed bi-level image planes in the received compressed page data at a resolution of 320 to 1600 dpi in each plane; a half-toner/compositor for creating a composite image by halftoning the continuous tone image planes decoded by the first decoder and compositing the bi-level image planes decoded by the second decoder over the halftoned continuous tone image planes; and a printhead driver arranged to output the composite image to the printhead. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification