LIQUID DISCHARGE DEVICE, AND DISCHARGE ABNORMALITY TESTING METHOD

摘要

A liquid discharge device includes a head having a piezoelectric element that vibrates a vibrating plate, a pressure chamber for which the internal pressure is increased and decreased by vibration of the vibrating plate, and a nozzle in communication with the pressure chamber, that can discharge a liquid by increasing and decreasing the pressure of the pressure chamber, a drive unit that outputs drive signals to the piezoelectric element, a testing unit that tests discharge abnormality of the nozzle based on a vibration pattern of residual vibration inside the pressure chamber that occurs due to the drive signals, and a control unit that has the drive unit output a second drive signal after having it output a first drive signal, and that has the testing unit detect the discharge abnormality of the nozzle after the second drive signal is output.

主权项

1. A liquid discharge device comprising:
a head having
a piezoelectric element configured and arranged to vibrate a vibrating plate,a pressure chamber configured and arranged to increase and decrease an internal pressure by vibrating the vibrating plate, anda nozzle in communication with the pressure chamber, configured and arranged to discharge liquid housed in the pressure chamber by increasing and decreasing the internal pressure of the pressure chamber; a drive unit configured and arranged to output drive signals to the piezoelectric element; a testing unit configured and arranged to test for discharge abnormality of the nozzle based on a vibration pattern of residual vibration within the pressure chamber that occurred due to the drive signals; and a control unit configured to control the drive unit to output a second drive signal after a first drive signal is output, and to control the testing unit to test the discharge abnormality of the nozzle after the second drive signal is output by the drive unit.