LIQUID JET HEAD, DRIVING METHOD OF LIQUID JET HEAD AND LIQUID JET DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a liquid jet head 1 where the discharge speed variation of a droplet is little even when the frequency of a driving signal is varied.SOLUTION: A pulse width where the discharge speed of a droplet becomes maximal first is Wwhen the pulse width of a single driving pulse given as a driving signal is gradually increased. A pulse width where the discharge speed of the droplet becomes minimal first is W(>W) when the pulse width is increased further. The pulse width Wz of a driving pulse Pz given last in one cycle satisfies equation (1): (W+3 W)/4≤Wz≤(3 W+W)/4...(1). The off intervals Wof a plurality of driving pulses included in one cycle satisfy equation (2): 0