Patent ID: 8057862

Claim:
A method for jetting color ink applied to a sub-pixel, comprising: determining a predetermined margin distance between a string of color ink droplets and a first border of the sub-pixel; determining a maximum variance value of the predetermined margin distance; randomly determining a variance value, wherein the variance value is selected between zero to the maximum variance value of the predetermined margin distance; combining the predetermined margin distance with the variance value to obtain a first margin distance; and beginning jetting of color ink from a nozzle after moving the first margin distance from the first border, wherein the nozzle stops jetting the color ink after jetting the color ink for a jetting distance to form the string of color ink droplets, and a distance between the string of color ink droplets and a second border of the sub-pixel is second margin distance, wherein the first margin distance is the predetermined margin distance plus the variance value, and the second margin distance is the predetermined margin distance minus the variance value, wherein the maximum variance value is one fifth of the predetermined margin distance, wherein the method further comprises partitioning the maximum variance value into a plurality of levels, and randomly selecting the variance value from one of the levels.