Patent ID: 6485133
Filing Date: 2002-11-26
Classification: B41J

Abstract:
An ink jet recording apparatus comprising:a recording head including a piezoelectric actuator for varying the volume of a pressure generating chamber by the deformation thereof to eject an ink drop from a nozzle communicating with the pressure generating chamber; a drive signal generator for generating a drive signal, said drive signal including, an expansion potential for deforming the piezoelectric actuator so as to expand the pressure generating chamber; a contraction potential for deforming the piezoelectric actuator so as to contract the pressure generating chamber; an ejection element for varying a potential of the drive signal from the expansion potential to the contraction potential to eject the ink drop from the nozzle; and a contraction holding element for holding the contraction potential to keep the contracted state of the pressure generating chamber, said generator comprises, an ejection period information storage for storing a plurality of values of a duration of the ejection element; and a contraction holding period information storage for storing a plurality of values of a duration of the contraction holding element, wherein the drive signal generator selects one duration of the ejection element and one duration of the contraction holding element respectively from the ejection period information storage and the contraction holding information storage such that the duration of the ejection element is matched with a natural period of the piezoelectric actuator, and a resulting value obtained by adding the duration of the ejection element and the duration of the contraction holding element is matched with a natural period of the pressure generating chamber.