Method and drive circuit for driving piezoelectric element, and liquid-droplet ejection head
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United States of America Patent
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Aug 19, 2014
Grant Date -
Dec 27, 2012
app pub date -
Mar 29, 2012
filing date -
Jun 24, 2011
priority date (Note) -
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Abstract
A method for driving a piezoelectric element of a head, including: a step of increasing a voltage of a power source to a reference voltage level; and a step of charging one electrode of two electrodes interposing the piezoelectric element to the reference voltage level by repeating source-connections and source-disconnections between the power source and the one electrode while keeping the voltage of the power source at the reference voltage level, such that a ratio of a connection time of each of at least one of second and subsequent connections of the source-connections to a disconnection time of a corresponding source-disconnection continued from each of the at least one of the second and subsequent connections is greater than a ratio of a connection time of a first connection of the source-connections to a disconnection time of a source-disconnection continued from the first connection.
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