Patent ID: 7896466
Filing Date: 2011-03-01
Classification: B41J

Abstract:
1. An ink jet printing apparatus for printing an image on a print medium by using a print head which can eject a first ink drop and a second ink drop, the second ink drop having the same color as and different size from the first ink drop, the ink jet printing apparatus comprising: means for main-scanning the print head relative to the print medium in a forward direction and in a backward direction; and means for controlling ejections so that, when the first ink drop and the second ink drop are ejected toward the same pixel on the print medium, the first ink drop and the second ink drop are ejected in main scans of different directions; wherein a satellite of the first ink drop ejected toward the same pixel lands shifted in the forward or backward direction with respect to main dots of the first and second ink drops that land on the same pixel and a satellite of the second ink drop lands shifted, with respect to the main dots of the first and second ink drops, in a direction opposite the direction in which the satellite of the first ink drop shifts.