| 摘要 |
PROBLEM TO BE SOLVED: To eliminate unevenness in printing density so as to prevent deterioration in image quality, by preventing the occurrence of a standing wave so as to prevent lack of the replenishment quantity of ink and the downsizing of an ink droplet. SOLUTION: When f represents a driving frequency for driving a heating resistor and Lfn represents the length of a common channel wherein the standing wave is generated in the ink, the actual length L of the common channel is set not to correspond to Lfn. When L represents the length of the common channel and Fn (a suffix n represents an nth-order harmonic index) represents the number of vibrations generated in the ink in common channel by the standing wave, the driving frequency f for actually driving the heating resistor is set not to correspond to Fn. COPYRIGHT: (C)2005,JPO&NCIPI
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