| 摘要 |
To provide a driving method of an ink jet recording head and an ink jet recording apparatus capable of maintaining a satellite at the time of ejecting a big droplet always in a good flying condition without regard to a change in environment temperature, and also speeding up refill operation after ejecting the big droplet. A driving wave form for driving a piezoelectric actuator comprises a first voltage changing process 71 to compress a pressure generating chamber at a rise time of t1, and a second voltage changing process 72 to expand the pressure generating chamber at a fall time of t3 after the voltage is maintained during a time of t2. Here, the start time, voltage changing time and voltage variation of the second voltage changing process are set so that, in a room temperature environment, a first peak value v1 and a second peak value v2 of particle velocity generated at the nozzle section satisfy the condition: 0.3<=v2/v1<=0.6. Thereby, the occurrence of a low velocity satellite or a fine satellite is prevented in a wide range of temperature, and thus it is made possible to always maintain the satellite in a good flying condition, accelerate refill speed after ejecting the big drop, and discharge the ink droplet in a high frequency.
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