Patent ID: 8619326

Claim:
A process of forming a regular array of rows of subpixels on a workpiece, the subpixels having four different colors, and having a subpixel pitch s, and wherein q colors are formed by printing and r colors are formed by a non-printing method, said process comprising: (1) providing a printing head having z nozzles arranged in a row with a spacing between the nozzles of p, where z=4n 1 and p=3s, the printing head being at a first position relative to the workpiece; (2) providing q different color printing inks to the printing head, one color printing ink for each of the q printed colors; (3) supplying each nozzle on the printing head with color printing ink in an alternating pattern, wherein adjacent nozzles on the printing head are not supplied the same color; (4) dispensing said color printing ink from the z nozzles to print (5) moving and printing in a first printing pattern comprising: (a) moving the workpiece laterally relative to the printing head by a distance d 1 , where d 1 =4n 2 s; (b) printing a set of z rows of subpixels with the printing head; (6) moving and printing in a second printing pattern comprising: (c) moving the workpiece laterally relative to the printing head by a distance d 2 , where d 2 =d 1 ; (d) printing a set of z rows of subpixels with the printing head; (7) moving and printing in a third printing pattern comprising: (e) moving the workpiece laterally relative to the printing head by a distance d 3 , where d 3 =4n 3 s, such that d 1 +d 2 +d 3 =pz; and (f) printing a set of z rows of subpixels with the printing head; (8) repeating steps (5) through (7) multiple times in the same order; and (9) applying r colors by a non-printing method; where: n 1 is an integer greater than 0; n 2 is an integer greater than 0, such that the integer is not a multiple of three and n 2 â‰¦n 1 ; n 3 is an integer such that 2n 2 +n 3 =3n 1 ; q is an integer from 1-4; and r is an integer, such that q+r=4; and wherein the patterns are carried out in the order (i) first printing pattern, followed by second printing pattern, followed by third printing pattern, or (ii) third printing pattern, followed by first printing pattern, followed by second printing pattern.