Patent ID: 8675252

Claim:
A method of forming a regular array of rows of subpixels on a workpiece, the subpixels having c different colors and having a subpixel pitch s, wherein a of the colors are formed by printing, said method comprising: (a) providing a printing head having at least two sets of z adjacent nozzles arranged in a row, wherein the spacing between adjacent nozzles within the same set is p 1 =cs and the spacing between the adjacent sets of nozzles is p 2 =(c+1)s, the printing head being at a first position relative to the workpiece; (b) providing a different printing ink, one for each of the a colors; (c) supplying each of the printing inks to the nozzles such that each of the nozzles within a set receive the same color and a different color is supplied to each set of nozzles; (d) printing a first set of az rows of subpixels with the printing head; (e) moving the workpiece laterally relative to the printing head by a distance d, where d=cz(s); (f) printing a second set of az rows of subpixels with the printing head; (g) repeating steps (e) and (f) n−2 times for a total of n sets of az rows of subpixels; where: a is an integer greater than 1; c is an integer greater than 1; n is an integer greater than 1; and z is an integer greater than 1 wherein c=4 and the colors are red, blue, green and white.