Importance

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Abstract

An ejection pulse DP sequentially and continuously includes an expansion phase p1 where a voltage changes so as to cause a pressure chamber to expand, an expansion hold phase p2 where a potential at an end edge of the expansion phase is maintained for a predetermined time, a contraction phase where the voltage changes so as to cause the pressure chamber to contract, and a time t1 between a start edge and the end edge of the expansion phase and a time t2 between a start edge and an end edge of the contraction phase are specified in the following range, respectively:

description='In-line Formulae' end='lead'Tc/3≦t1≦Tc   (A)description='In-line Formulae' end='tail'

description='In-line Formulae' end='lead'Tc/3≦t2≦Tc   (B).description='In-line Formulae' end='tail'

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First Claim