Printer controller for monitoring an ink drop count

Details Printer controller for monitoring an ink drop count Printer controller for monitoring an ink drop count

2008-06-25

2010-06-29

Nguyen, Thinh H (Department: 2861)

Incremental printing of symbolic information

Ink jet

Controller

C347S007000, C347S086000

Reexamination Certificate

active

07744181

ABSTRACT:
Provided is a printer controller for a pagewidth printer having a printhead configured to print according to print quality information. The printer has a paper transport mechanism for transporting a sheet of paper along a media path through the printer. The controller includes a processor having an address, data and control bus, an expander unit and a decoder unit each coupled to the bus and configured to decompress a bi-level black layer and a continuous tone (contone) layer of a page to be printed. The controller also includes a replaceable ink cartridge arranged in the media path and having a first integrated circuit (IC) interfaced with the processor, the first IC containing the print quality information. Also included is a second IC interfaced to the processor. The processor is configured to count a number of drops of ink printed by the printhead, to update a remaining drop count of the ink cartridge using the counted drops printed and to write an updated remaining drop count to the second IC each time a page has been printed. The processor is also configured to control the paper transport mechanism during printing.

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