Patent ID: 6663212
Filing Date: 2003-12-16
Classification: B41J

Abstract:
An ink ejection device comprising:a cavity plate formed with a pressure chamber and a nozzle; an actuator that fluctuates an internal pressure of the pressure chamber to eject an ink droplet from the nozzle onto a recording medium; and a driving unit that selectively outputs a driving signal to the actuator, wherein the actuator fluctuates the internal pressure in response to the driving signal, the driving unit outputs the driving signal for ejecting a smaller ink droplet at a first timing earlier than a second timing for a larger ink droplet and a time difference t between the first timing and the second timing is represented by a formula: t=g(1/V1âˆ’1/V2) where g is a distance between the nozzle and the recording medium; V1 is a velocity of the smaller ink droplet; and V2 is a velocity of the larger ink droplet.