Liquid ejecting apparatus

摘要

A liquid ejecting apparatus includes a piezoelectric element, a nozzle that ejects a liquid in association with the driving of the piezoelectric element, a driving signal generation unit that generates a driving signal for driving a plurality of the piezoelectric elements, and a residual vibration detection unit that detects residual vibration generated by the driving of the piezoelectric element. The driving signal includes an ejection pulse for ejecting a liquid, a first vibration damping pulse that suppresses residual vibration generated by the ejection pulse, a second vibration damping pulse which is a pulse different from the first vibration damping pulse and suppresses residual vibration generated by the ejection pulse, and an inspection pulse for detecting the residual vibration signal.

主权项

1. A liquid ejecting apparatus comprising:
a piezoelectric element; a cavity which is filled with a liquid inside and has internal pressure increasing or decreasing by displacement of the piezoelectric element; a nozzle that communicates with the cavity and ejects the liquid as droplets by the increase or decrease in internal pressure of the cavity; a driving signal generation unit that generates a driving signal for displacing the piezoelectric element; and a residual vibration detection unit that detects a residual vibration signal generated in the piezoelectric element, on the basis of a variation in internal pressure of the cavity which occurs by applying the driving signal to the piezoelectric element, wherein the driving signal includes:
an ejection pulse for ejecting a liquid;a first vibration damping pulse that suppresses residual vibration generated by the ejection pulse;a second vibration damping pulse which is different from the first vibration damping pulse and suppresses residual vibration generated by the ejection pulse; andan inspection pulse for detecting the residual vibration signal; wherein a potential difference with respect to a reference potential at the time of application of the second vibration damping pulse is smaller than a potential difference with respect to the reference potential at the time of application of the first vibration damping pulse.