| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an inkjet head driver for performing a precursor minute vibrating only when required so as not make a head temperature rise. <P>SOLUTION: When exceeding a duration of ink deterioration in the middle of printing due to the length of the conveyance direction (arrow head) being larger and the time for the printing range passing a head being longer, the conveyance speed of a sheet of paper P and the length of conveyance direction are detected (a), and the precursor minute vibrating is performed at the timing just before the front end of the paper P conveyed comes just under an inkjet head 9 (b), and the precursor minute vibrating is performed at the timing of not discharging an ink droplet while performing the formation of an image G by discharging the ink for every pixel (c). When not exceeding the duration of ink deterioration in the middle of printing, the precursor minute vibrating during printing is not performed. <P>COPYRIGHT: (C)2008,JPO&INPIT |
