| 摘要 |
PCT No. PCT/JP97/01238 Sec. 371 Date Dec. 10, 1997 Sec. 102(e) Date Dec. 10, 1997 PCT Filed Apr. 10, 1997 PCT Pub. No. WO97/37852 PCT Pub. Date Oct. 16, 1997A method of driving an ink-jet recording head which is provided with nozzle openings, pressure generating chambers each communicating with reservoirs via ink supply ports and keeping the Helmholtz resonance frequency with a period Tc, and piezo-electric vibrators for expanding and contracting the respective pressure generating chambers. The method of driving the ink-jet recording head comprises a first step of expanding the pressure generating chamber, a second step of maintaining the expanded condition, and a third step of causing an ink droplet to be jetted from the nozzle opening by contracting the pressure generating chamber thus expanded. The duration of the second step is set not greater than +E,fra 1/2+EE of the period Tc of the Helmholtz resonance vibration in order to prevent the generation of satellites and ink mists resulting from the swollen-back meniscus by minimizing the meniscus vibration, so that the driving at a high driving frequency is made possible by shorting the attenuation time of the meniscus corresponding to its reduced vibration.
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