| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that stripes and unevenness are generated to cause the lowering of the quality of an image and when output holes with small opening areas and output holes with large opening areas are formed so as to be positioned on the same virtual line, having a row of the output holes with the small opening areas and a row of the output holes with the large opening areas, along a main scanning direction to perform gradation recording. SOLUTION: The first row 13 of the output holes and the second row 14 of the output holes wherein the first output holes 11 with the small opening areas and the second output holes 12 with the large opening areas are alternately formed exist. The first output hole 11 in the first row 13 of the output holes and the second output hole 12 in the second row 14 of the output holes are formed so that they are positioned on the same virtual line L0 along the main scanning direction. The stripes are prevented from being generated by filling up a space between the large dots made by the second output holes 12 with the small dots made by the first output holes 11, without a clearance. COPYRIGHT: (C)2005,JPO&NCIPI |
