INK JET HEAD DRIVING METHOD

摘要

PURPOSE: An ink jet head driving method is provided to reduce the pressure of an ink chamber at the very beginning and make a printing speed fast. CONSTITUTION: The ink jet head driving method has the steps of:a volume increase step to reduce the pressure of the ink chamber by feeding the first driving pulse voltage among driving pulse voltage; a volume decrease step to increase the pressure of the ink chamber by feeding the second driving pulse voltage among driving pulse voltage; a volume return step to discharge an ink drop by returning the volume of the ink chamber to the original volume; and a repeat step to form one ink drop as the later discharged ink drop puts together with the first discharged ink drop by gradually increasing the speed of a consecutive ink drop.