| 摘要 |
<p>According to the present invention, a method of driving an ink-jet recording head comprising nozzle openings (6), pressure generating chambers (2) each communicating with reservoirs (3) via ink supply ports and having the Helmholtz resonance frequency with a period Tc, and piezo-electric vibrators (11) for expanding and contracting the respective pressure generating chambers, comprises a first step of expanding the pressure generating chamber; a second step of continuously expanding the pressure chamber at a volumetric speed different to that at the first step; and a third step of contracting the pressure generating chamber (2) in an expanded state. The method is such that an ink droplet fit for printing is jetted by generating vibration at the Helmholtz resonance frequency, whereby the generation of a satellite or an ink mist resulting from a swollen-back meniscus is prevented by minimising meniscus vibration. Thus, meniscus attenuating time is shortened by minimising the meniscus vibration in order to make a printing operation performable at a high driving frequency.</p> |
