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Print engine/controller and printhead interface chip incorporating the engine/controller

  • US 6,795,215 B1
  • Filed: 05/23/2000
  • Issued: 09/21/2004
  • Est. Priority Date: 05/23/2000
  • Status: Expired due to Term
First Claim
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1. A print engine/controller to drive an ink drop print head comprising:

  • an interface at which to receive compressed page data;

    a contone image decoder to decode any compressed continuous tone image planes in the received compressed page data;

    a bi-level decoder to decode any compressed bi-level image planes in the received compressed page data;

    a half-toner/compositor to dither any continuous tone image planes and composite bi-level image plane data with any dithered image plane; and

    a print head driver to output the composite to a print head, wherein the page data in the bi-level image plane is scaled in the halftoner/compositor.

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