| 摘要 |
A liquid ejection apparatus includes: a passage unit, a piezoelectric actuator, a drive signal generator, a driver, a voltage value changing unit, and an interval setting unit. The piezoelectric actuator applies energy to liquid in the passage unit. The drive signal generator generates a drive signal to be supplied to the piezoelectric actuator, based on a reference voltage value. The driver supplies the drive signal generated by the drive signal generator to the piezoelectric actuator. The voltage value changing unit changes the reference voltage value to a larger voltage value every time an accumulated time during which a voltage is applied between electrodes of the piezoelectric actuator satisfies a predetermined condition. The interval setting unit determines a new time interval to a next change of the reference voltage so that the new time interval is shorter than before, every time the reference voltage value is changed.
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