APPARATUS AND METHOD DETECTING FOR OPERATING OF A PIEZO INKJET HEAD

摘要

An apparatus and a method of detecting operation of a piezo inkjet head are provided to simply obtain a deformation amount of the piezo inkjet head by removing current due to a capacitor component of the piezo inkjet head from current due to voltage applied to the piezo inkjet head. An apparatus of detecting operation of a piezo inkjet head includes first to third current detecting units(100,120,140). The first current detecting unit detects first current(I1) outputted from a piezo element(PZT) of the piezo inkjet head when applying predetermined voltage(V) to the piezo element. The second current detecting unit applies the predetermined voltage to a capacitor having the same capacitance as a component of the piezo element and detects second current(I2) outputted from the capacitor. The third current detecting unit detects third current(I3) corresponding to a difference between the first and second currents as a deformation amount of the piezo element due to the predetermined voltage.