Liquid discharging apparatus

摘要

Each of M head units of a print head includes a driving signal generator and a plurality of piezoelectric elements. A common control signal is supplied from a control signal supply portion of a control unit to the respective driving signal generators of the M head units. The driving signal generator of each head unit generates a driving signal from the control signal according to characteristics (for example, relationship of a deformation amount with respect to an applied voltage) of each latter stage piezoelectric element and supplies the driving signal to each piezoelectric element.

主权项

1. A liquid discharging apparatus comprising:
a first discharge portion group including a plurality of discharge portions that each include a nozzle that discharges a liquid; a pressure chamber that communicates with the nozzle; and piezoelectric element which is provided for each pressure chamber and causes liquid droplets to be discharged from the nozzle by charging and discharging according to a first driving signal; a second discharge portion group including a plurality of discharge portions that each include a nozzle that discharges a liquid, a pressure chamber that communicates with the nozzle; and a piezoelectric element which is provided for each pressure chamber and causes liquid droplets to be discharged from the nozzle by charging and discharging according to a second driving signal; a first driving signal generator that generates the first driving signal from a control signal according to characteristics of the first discharge portion group; a second driving signal generator that generates the second driving signal from a control signal according to characteristics of the second discharge portion group; and a control signal supply portion that supplies a common control signal to the first driving signal generator and the second driving signal generator.