Invention Grant
US08746829B2 Image recording apparatus and image recording method 有权
图像记录装置和图像记录方法

Image recording apparatus and image recording method
Abstract:
An image recording apparatus has low intensity ink ejection parts for ejecting low intensity ink, and a high intensity ink ejection part for ejecting high intensity ink. With respect to a direction orthogonal to a moving direction of printing paper, a pitch of outlets in the high intensity ink ejection part is larger than that in the low intensity ink ejection part. Thus, manufacturing cost of the apparatus is reduced. With respect to each gray level in a middle grayscale range, if a tint image is recorded with the high intensity ink, a spatial frequency of this tint image is lower than that of a tint image recorded with the low intensity ink. By the above image recording control, even if the high intensity ink ejection part includes an abnormal outlet where a flight direction of droplet is abnormal, streak unevenness in a color halftone image can be suppressed.
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