| 摘要 |
PROBLEM TO BE SOLVED: To provide a liquid injection device capable of suppressing deterioration in liquid-droplet discharge characteristics when discharging liquid droplets while driving both actuator units respectively stored in each of storage chambers adjacent to each other in the same discharge cycle. SOLUTION: A drive signal generation circuit generates a first drive signal COM1, which is supplied to one first vibrator unit in the actuator units respectively stored in each of the storage chambers adjacent to each other with a partition wall of a head case between them, and a second drive signal supplied to the other second vibrator unit. A second discharge pulse of the second drive signal is delayed in relation to generation timing of a first discharge pulse of the first drive signal by a delay time ofΔt(Δt1,Δt2). When a natural vibration cycle of the partition wall is set as Tw and a generation period of the second discharge pulse (a drive time from the start of driving a piezoelectric vibrator by the second discharge pulse of the second drive signal until the discharge of ink-droplets) as Tp, the delay timeΔt is set within a range of around Tw/4 of Tw-Tp on the basis of Tw-Tp. COPYRIGHT: (C)2007,JPO&INPIT |
