Liquid ejecting apparatus and liquid ejecting method
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United States of America Patent
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Oct 14, 2014
Grant Date -
Apr 10, 2014
app pub date -
Oct 10, 2013
filing date -
Oct 10, 2012
priority date (Note) -
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Abstract
A liquid ejecting apparatus includes a reference drive signal generation section that generates a reference drive signal, a signal modulation section that modulates the reference drive signal to generate a modulation reference drive signal, a signal amplification section that amplifies the modulation reference drive signal using switching elements to generate a modulation drive signal, a signal conversion section that converts the modulation drive signal to a drive signal, a piezoelectric element that deforms in response to the drive signal, a pressure chamber that expands or contracts due to the deformation of the piezoelectric element, and a nozzle opening portion that communicates with the pressure chamber. A period of alternating current components contained in the modulation drive signal are shorter than a duration of a maximum voltage or a minimum voltage, and is longer than a total time of turn-on delay times and turn-off delay times of the switching elements.
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