Patent ID: 6460959
Filing Date: 2002-10-08
Classification: B41J

Abstract:
An ink jet recording apparatus comprising:a drive signal generator for generating a drive signal including a first waveform component for jetting an ink drop to be a micro dot and a second waveform component for jetting an ink drop to be a middle dot; a pressure generating chamber communicated with a nozzle orifice; and a pressure generating element for varying the volume of the pressure generating chamber in accordance with the drive signal to jet an ink drop from the nozzle orifice, wherein an ink drop to be a large dot is jetted from the nozzle orifice when the first waveform component and the second waveform component are consecutively applied to the pressure generating element, and wherein a time interval T&mgr;m between an end point of the first waveform component and a start point of the second waveform component is set so as to substantially satisfy the following equation: T&it;â€ƒ&it;Î¼&it;â€ƒ&it;m=n2&it;Tchere, Tc denotes a natural period of the pressure generating chamber, and n is an odd number of â€œ3â€  or more.