TEMPERATURE DETECTOR OF INKJET HEAD, INKJET HEAD, INKJET RECORDER, AND TEMPERATURE DETECTING METHOD OF INKJET HEAD

摘要

PROBLEM TO BE SOLVED: To provide a temperature detector of an inkjet head which is small and can quickly correctly detect a temperature of ink inside a piezoelectric actuator, and to provide an inkjet recorder, and a temperature detecting method of an inkjet head.;SOLUTION: The temperature detector includes a voltage control part 73 which controls a size of an external voltage and outputs the voltage as a driving voltage; a switching part 74 which converts the driving voltage to a pulse-like voltage, switches the voltage to either a voltage for ink ejection or a voltage for temperature detection by changing a pulse width of the pulse-like driving voltage, and applies either the voltage for ink ejection or the voltage for temperature detection to a predetermined driving electrode part 50; and a current detecting part 72 which detects a current value flown in the piezoelectric actuator by applying the voltage for temperature detection to a predetermined driving electrode. The voltage control part 73 determines the size of the driving voltage on the basis of the current value detected by the current detecting part 72, and the switching part 74 switches to the voltage for temperature detection at the time of non ejection of ink.;COPYRIGHT: (C)2009,JPO&INPIT