Patent ID: 7513586

Claim:
A liquid ejection apparatus, comprising: a nozzle which ejects liquid; a pressure chamber which is connected to the nozzle and filled with the liquid to be ejected from the nozzle; an actuator which causes the liquid to be ejected from the nozzle by applying a pressure change to the liquid inside the pressure chamber, by changing volume of the pressure chamber; and a drive signal generating device which generates a drive signal for driving the actuator, wherein the drive signal includes: a first pull drive waveform component which drives the actuator to increase the volume of the pressure chamber; a push drive waveform component which drives the actuator to reduce the volume of the pressure chamber by a first volume change amount after the first pull drive waveform component, so as to push out a column of the liquid from the nozzle; and a second pull drive waveform component which drives the actuator to again increase the volume of the pressure chamber by a second volume change amount after the push drive waveform component, so as to sever the column of the liquid, an absolute value of the second volume change amount being not less than an absolute value of the first volume change amount; and wherein an intrinsic oscillation cycle Te of a volumetric speed of the liquid in the nozzle, and a period T 1 from a first pull action due to the first pull drive waveform component until a push action due to the push drive waveform component, satisfy the following relationship: ( Te/ 2)−1 μs≦ T 1≦( Te/ 2)+1 μs.