| 摘要 |
PROBLEM TO BE SOLVED: To enable microink droplets with a smaller dia. than a nozzle diameter to be stably discharged at a high drive frequency. SOLUTION: In a method for driving an ink jet recording head which discharges ink droplets 1 from a nozzle communicating with a pressure generation chamber 2 by applying a drive voltage to a piezoelectric actuator 4 and causing a pressure change in the pressure generation chamber 2, a drive voltage waveform is constituted by a first voltage change process which applies voltage in a direction where the pressure generation chamber 2 is inflated, a second voltage change process which applies voltage in a direction where the pressure generation chamber 2 is compressed and a third voltage change process which applies voltage in a direction where the pressure generation chamber 2 is again inflated. Further, voltage change times t2, t3 in the second and the third voltage change process are set to be the duration of 0<t2<Tc/2, 0<t3<Tc/2 to the intrinsic period Tc of a pressure wave generated in the pressure generation chamber 2.
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