| 摘要 |
PROBLEM TO BE SOLVED: To provide an ink droplet ejection device capable of forming an ink droplet to be ejected into a smaller one, without decreasing an ejection speed, and by extension, reducing landing precision, and shortening an entire pulse width to increase a driving frequency and achieving a higher recording speed. SOLUTION: In the ink droplet ejection device, when forming an ink droplet to be ejected into a smaller one, as a driving pulse signal applied to an actuator, a prepulse Pp insufficient for ejecting an ink droplet and a stabilizing pulse Ps are respectively output before and after a main pulse Pm ejecting an ink droplet, and a pulse width Tp of the prepulse Pp, a pulse width Tm of the main pulse Pm, a pulse width Ts of the stabilizing pulse Ps, a space Wp between a terminal end of the prepulse Pp and a leading end of the main pulse Pm, and a space Wm between a terminal end of the main pulse Pm and a leading end of the stabilizing pulse Ps, respectively satisfy the relationships of 0.1AL≤Tp≤0.44AL, 0.5AL≤Tm≤0.8AL, 0.1AL≤Ts≤0.5AL, 0.1AL≤Wp≤0.5AL and 0.4AL≤Wm≤0.8AL for a period of time AL when a pressure wave propagates one way in an ink flow path contained in a pressure chamber. COPYRIGHT: (C)2007,JPO&INPIT
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