Method and apparatus for optimizing inkjet fluid drop-on-demand of an inkjet printing head
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United States of America Patent
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-
Dec 2, 2003
Grant Date -
Oct 2, 2003
app pub date -
Mar 29, 2002
filing date -
Mar 29, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for eliminating reflected waves from a vibrating diaphragm surface within an acoustic chamber of an inkjet printer piezo-crystal driver. The first step involves generating an electro-acoustical driven pressure waveform from the piezo-crystal driver, the diaphragm initially acting on ink to release it, wherein the waveform is reflected from a nozzle plate disposed remotely from the diaphragm. Further steps include determining an instant when the reflected pressure waveform returns to the diaphragm surface and producing a matched pulse waveform causing a reverse motion in the diaphragm exactly at that instant, whereby the reverse motion reverses the initial diaphragm action, such that the matched pulse waveform absorbs and eliminates the reflected pressure waveform at the exact instant.
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