Patent ID: 6120129
Filing Date: 2000-09-19
Classification: G06K

Abstract:
An ink-jet printer apparatus for printing an image on a printing medium by scanning a printhead having a plurality of print elements for ejecting ink, said printhead having a plurality of print element groups for respectively ejecting yellow, cyan, magenta, and black inks, comprising:first print means for performing printing in accordance with data having a first gradation and expressed by binary data using a first print element group, of the plurality of print element groups, for ejecting yellow ink;first storage means for storing the data having the first gradation expressed by the binary data;second print means for performing printing in accordance with data having a second gradation higher than the first gradation and expressed by multi-valued data using a second print element group, of the plurality of print element groups, other than the first print element group; andsecond storage means for storing the data having the second gradation and expressed by the multi-valued data, wherein the second print element group prints dots corresponding to the data having the second gradation in plural scannings, with at least portions of the dots overlapping each other.