Patent ID: 7213898
Filing Date: 2007-05-08
Classification: B41J

Abstract:
1. A color ink-jet printer comprising: a first ink ejecting portion operable to eject droplets of a black ink; a second ink ejecting portion operable to eject droplets of an ink of a color other than black; a first control portion operable to control said first ink ejecting portion such that a total volume of at least one droplet of said black ink ejected by said first ink ejecting portion to form each dot of the black ink on a recording medium is equal to a selected one of a plurality of different total volume values; and a second control portion operable to control said second ink ejecting portion such that a total volume of at least one droplet of the ink of said color other than black, which is ejected by said second ink ejecting portion to form each ink dot of said color other than black on the recording medium, is equal to another of said plurality of different total volume values which is smaller than said selected one total volume value, and wherein said first and second control portions control said first and second ink ejecting portions such that a relationship between said selected one total volume value of the at least one droplet of said black ink and said another total volume value of the at least one droplet of the ink of said color other than black changes when a presently selected print mode of the color ink-jet printer is changed from one mode to another, wherein said first and second control portions are operable to select said one and another of said plurality of different total volume values, on the basis of said presently selected print mode that is selected from a plurality of different print modes which correspond to respective different values of resolution of said image.