Inkjet head driving apparatus and driving method

Details Inkjet head driving apparatus and driving method Inkjet head driving apparatus and driving method

2008-03-19

2010-12-28

Huffman, Julian D. (Department: 2853)

Incremental printing of symbolic information

Ink jet

Controller

C347S009000, C347S010000

Reexamination Certificate

active

07857406

ABSTRACT:
An inkjet head driving apparatus which drives an inkjet head for use in gradation printing which is performed to cause a capacity of each of a plurality of pressure chambers filled with ink to be changed by a drive pulse applied to an actuator, an ink drop to be emitted onto a recording medium from a nozzle communicating with the corresponding pressure chamber, and the number of ink drops emitted to be controlled according to the number of drive pulses, the driving apparatus including a drive signal generating section which applies a deboost pulse to decrease pressure in the pressure chamber before the drive pulse for emitting a first drop of ink is applied, wherein the deboost pulse includes a pulse applied to expand or contract the capacity of the pressure chamber for a predetermined length of time, and a quiescent time following the pulse.

REFERENCES:
patent: 6193343 (2001-02-01), Norigoe et al.
patent: 7195327 (2007-03-01), Kitami et al.
patent: 2000-015802 (2000-01-01), None

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