| 摘要 |
PROBLEM TO BE SOLVED: To prevent degradation of image quality due to uneven density or white streak. SOLUTION: Under a state where a nozzle 104a facing a pair of heating resistors 102a and 102b arranged side by side in the substantially same direction as the traveling direction of a recording sheet and ejecting an ink liquid drop in the traveling direction of the recording sheet, and a nozzle 104a facing a pair of heating resistors 102c and 102d arranged side by side in the width direction of the recording sheet and ejecting an ink liquid drop in the width direction of the recording sheetare arranged alternately in the width direction of the recording sheet P, ink liquid drops are ejected simultaneously from respective nozzles 104a while varying the ejection angle at random with respect to the recording sheet. Since ink drops adjacent at the shooting point of the ink drop on the recording sheet compensate the boundaries each other, white streak and uneven density of color can be prevented. COPYRIGHT: (C)2004,JPO&NCIPI
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