Method Of Page Expansion And Printing With A Pagewidth Printer Having Low-Speed And High-Speed Firing Modes
First Claim
1. A method of page expansion and printing of image data received from a computer, said method comprising the steps of:
- receiving a page description from the computer, the page having a bi-level black layer compressed in an EDRL (Edge Delta and Runlength) format and a continuous tone (“
contone”
) layer,decompressing the respective layers in parallel;
halftoning the contone layer data to bi-level data and compositing the bi-level black layer over the bi-level data to form an image;
transmitting the image data for printing to a pagewidth printhead arrangement; and
operating the pagewidth printhead arrangement according to one of a low-speed nozzle firing mode and a high-speed firing mode, the low-speed firing mode having a firing rate half that of the high-speed firing mode.
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Accused Products
Abstract
This invention provides for a method of page expansion and printing of image data received from a computer. The method includes the steps of receiving a page description from the computer, the page having a bi-level black layer compressed in an EDRL (Edge Delta and Runlength) format and a continuous tone (“contone”) layer, and decompressing the respective layers in parallel. The method also includes the steps of halftoning the contone layer data to a bi-level data and compositing the bi-level black layer over the bi-level data to form an image, and transmitting the image data for printing to a pagewidth printhead arrangement. The method includes operating the printhead according to one of a low-speed nozzle firing mode and a high-speed firing mode, the low-speed firing mode having a firing rate half that of the high-speed firing mode.
74 Citations
7 Claims
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1. A method of page expansion and printing of image data received from a computer, said method comprising the steps of:
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receiving a page description from the computer, the page having a bi-level black layer compressed in an EDRL (Edge Delta and Runlength) format and a continuous tone (“
contone”
) layer,decompressing the respective layers in parallel; halftoning the contone layer data to bi-level data and compositing the bi-level black layer over the bi-level data to form an image; transmitting the image data for printing to a pagewidth printhead arrangement; and operating the pagewidth printhead arrangement according to one of a low-speed nozzle firing mode and a high-speed firing mode, the low-speed firing mode having a firing rate half that of the high-speed firing mode. - View Dependent Claims (2, 3, 5, 6, 7)
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Specification