Printer controller with printhead feedback

Details Printer controller with printhead feedback Printer controller with printhead feedback

2006-10-31

2006-10-31

Hsieh, Shih-Wen (Department: 2861)

Incremental printing of symbolic information

Ink jet

Controller

C347S042000

Reexamination Certificate

active

07128384

ABSTRACT:
In order to maintain printing consistency, printhead control circuitry is selectively coupled to feedback lines originating at each of a number of segments making up a micromechanical pagewidth printhead. The printhead control circuitry is able to select between feedback lines by controlling a tri-state bus. On the basis of the feedback signals the control circuitry adjusts the timing of the firing of nozzles making up the printhead. Consequently, print quality is maintained in the face of changing printhead conditions such as printhead temperature.

REFERENCES:
patent: 5511206 (1996-04-01), Yasuda
patent: 5630063 (1997-05-01), McConnell
patent: 5754193 (1998-05-01), Elhatem
patent: 5867183 (1999-02-01), Cornell
patent: 5982395 (1999-11-01), Olson
patent: 6145065 (2000-11-01), Takahashi
patent: 6302507 (2001-10-01), Prakash et al.
patent: 390202 (1990-10-01), None
patent: 842777 (1998-05-01), None
patent: WO 99/04368 (1999-01-01), None

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