Patent ID: 7152964

Claim:
A method for printing a plurality of pixels corresponding to a digital image comprising pixels of image data, the method comprising the steps of: (a) producing a stream of droplets including printing droplets having a first volume each selectively formed over a first time period and non-printing droplets having a second volume each selectively formed over a second time period, the second volume being a multiple of the first volume, the multiple being a volume discrimination ratio between printing droplets and non-printing droplets; (b) forming a print command using a half toning algorithm for printing a pixel in a two-dimensional array, the pixel having a print value; (c) determining if the print command is invalid by examining previously formed adjacent print commands; (d) replacing an invalid print command with a valid print command resulting in a modified error value to be diffused; and (e) diffusing the modified error value in accordance with the half toning algorithm.