Patent ID: 6655784
Filing Date: 2003-12-02
Classification: B41J,C09D,H04N

Abstract:
A printing system comprising a printer that creates dots with a plurality of different inks, so as to print an image on a printing medium, and a print controller that supplies control information to said printer, so as to control the creation of dots with the plurality of different inks,wherein said print controller comprises: a dot on-off condition specification unit that specifies dot on-off conditions with regard to a plurality of basic color inks and a dark ink based on input image data, the plurality of basic color inks being combined with one another to express achromatic color, the dark ink having a main wavelength region of light absorption substantially identical with that of one basic color ink selected out of the plurality of basic color inks but a lower lightness than that of the selected basic color ink; and a control information output unit that outputs the control information to specify the dot on-off conditions with regard to the plurality of basic color inks and the dark ink to said printer, said printer comprising: a control information input unit that receives the control information to specify the dot on-off conditions with regard to the plurality of basic color inks and the dark ink, which is output from said control information output unit; and a dot formation unit that creates dots with the plurality of basic color inks and the dark ink, based on the input control information.