| 摘要 |
To increase ink jet recording head responsivity and/or decrease recording head size, an ink jet recording apparatus is provided having plural liquid passages, each having an ejection outlet through which a droplet of liquid is ejected at the end of the liquid passage. Each of the passages is supplied with ink from only the other end. A common ink chamber contains the ink, and communicates with the liquid passages at different supply ports of the passages. Electrothermal transducer elements each have a planar heat generating element provided in each of the liquid passages, the electrothermal transducers being supplied with electric signals to produce a change in state of the ink involving the formation of a bubble in the liquid passage by thermal energy. A minimum distance La between each of the heat generating elements and the corresponding ejection outlet is between about 90 and 130 microns, and a minimum distance Lb between each of the heat generating elements and the corresponding supply port is not more than about 110 microns. La and Lb are selected such that La is greater than Lb. Further, a driving circuit energizes the heat generating elements, this circuit supplying the electric signals so that adjacent ones of the heat generating elements are driven with a time difference.
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