| 摘要 |
PROBLEM TO BE SOLVED: To solve problems wherein after the first ink drop is ejected in a conventional device, an ink meniscus is returned to a rest position and then the second ink drop is ejected so that it is hard to achieve high speed driving by such a driving method. SOLUTION: A driving pulse consists of a pulse having a first voltage V1 for enlarging an ink channel and a pulse having a second voltage V2 for reducing the ink channel. As the rate of the first voltage V1 to second voltage V2 is selected, it is possible to stably drive the ink channel at a high speed.
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