Print engine controller for a printhead assembly
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United States of America Patent
Stats
-
May 3, 2011
Grant Date -
Nov 6, 2008
app pub date -
Jun 15, 2008
filing date -
Jan 21, 2004
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Provided is print engine controller of a printhead assembly having a plurality of printhead modules. The controller includes a memory buffer to receive rasterized page data from a computer system, a page image expander for expanding the page data to retrieve page images, and dithering means for dithering a continuous tone (“contone”) layer over the page data. The controller also includes a compositor for compositing a black bi-level layer of the contone layer, rendering means for rendering infra-red tags over the contone layer, and an output driving the printhead modules to print the composited page data.
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