Patent ID: 7588305
Filing Date: 2009-09-15
Classification: B41J

Abstract:
1. A method for ejecting at least two different fluid drop sizes of a same fluid from a fluid ejector nozzle array in accordance with a page patterning methodology, comprising: receiving image data for at least a page of data; analyzing the received image data globally on a page by page basis to set a predetermined repeating alternating pattern of first and second drop sizes globally for each page that optimizes overall image quality for each particular page, the predetermined repeating alternating pattern set being selected from a pattern having a ratio of first to second drops in the pattern approximately 1:1 and one or more patterns having a ratio of first to second drops in the pattern substantially different from 1:1 so that one particular drop size is dominant in the pattern; selecting a particular full length waveform to drive each individual nozzle of the array to eject the set predetermined repeating alternating pattern of first and second different drop sizes of the same fluid across an output page for the entire page; driving the nozzle array using the set repeating alternating pattern to eject fluid based on the received image data to print the image data on the output page using the repeating alternating pattern containing both the first and second drop sizes set for that particular output page based on the global analysis of the received image data for that page, wherein the fluid nozzle array has a common nozzle geometry and the selecting selects from at least two different full length waveforms to eject the predetermined repeating alternating pattern of first and second different drop sizes.