| 摘要 |
PROBLEM TO BE SOLVED: To improve the quality of printing of an inkjet printer in which a plurality of nozzles are divided into a plurality of groups and a driving circuit is provided on every group. SOLUTION: By externally connecting a resistance circuit 20 to current mirror circuits 82 and 92 of driver IC 80 and 90 to make an inputted electric current in each current mirror circuit constant, a rising-up time Tr and a falling-down time Tf of each driving signal outputted by each of outputting circuits 83 and 93 are made to mutually coincide with each other. Therefore, as a difference between the qualities of printings between printing regions corresponding to channel areas driven by each of the driver IC can be eliminated, the quality of printing on the whole printing regions can be improved. COPYRIGHT: (C)2006,JPO&NCIPI
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