OPERATING CIRCUIT FOR INK-JET HEAD

摘要

PURPOSE: An inkjet head driving circuit is provided to stabilize a voltage of driving pulses operating a piezo element and to maintain an ink jetting speed regularly. CONSTITUTION: An inkjet head driving circuit(300) comprises a piezo element, an approval switch, and a compensation unit(60). The piezo element receives pulses generated by a pulse generating unit(20), thereby jetting ink. The approval switch determines whether applying the pulses to the piezo element or not according to printing data. The compensation unit is connected to the pulse generating unit. A capacitance value of each piezo element is the c. The compensation unit maintains the capacitance value connected to the pulse generating unit larger or same with[n/2]c and smaller or same with nc, regardless of the input printing data. [Reference numerals] (20) Pulse generating unit; (30) Control signal generating unit;