A printing method in which a pixel is resolved into a matrix and the gradation of a picture is variably set by dots printed in each pixel. The method includes a line setting step of setting a print density for lines corresponding to the main scanning direction along which dots are arrayed, and a dot-based...http://www.google.de/patents/US6007175?utm_source=gb-gplus-sharePatent US6007175 - Picture printing method and device printing pixels in which columns of dots are printed at different intensity levels
Picture printing method and device printing pixels in which columns of dots ...
