A droplet ejection head driving method applies a driving voltage waveform
to pressure-generating means, thus pressurizing a liquid in a pressure
chamber and causing a droplet to be ejected. The driving voltage waveform
includes a first voltage change process, which expands the pressure
chamber, and a second voltage change process, after the first voltage
change process, which shrinks the pressure chamber. A time interval
between the first voltage change process and the second voltage change
process is not more than 1/8 of a resonance period Tm of a meniscus
oscillation (a refill oscillation), which is governed by surface tension
of the liquid at a nozzle portion.