Patent ID: 7452044
Filing Date: 2008-11-18
Classification: B41J,H04N

Abstract:
1. A method for controlling a micro-fluid ejection head comprising at least a first heater chip and a second heater chip, each having an array of nozzles from which ink is ejected in raster lines to form a printed image, where the first and second heater chips are disposed in a staggered overlapping arrangement such that a number of the nozzles of the first heater chip are substantially aligned with a corresponding number of the nozzles of the second heater chip in an overlapping region comprising N number of sub-regions, the method comprising: (a) determining a difference in temperature between a temperature of the first heater chip and a temperature of the second heater chip; (b) based at least in part on the difference in temperature, determining a first number of nozzles in each sub-region of the first heater chip to be used in printing a first portion of the printed image; (c) based at least in part on the difference in temperature, determining a second number of nozzles in each sub-region of the second heater chip to be used in printing a second portion of the printed image; and (d) printing at least the first and second portions of the printed image using the first number of nozzles in each sub-region of the first heater chip and the second number of nozzles in each sub-region of the second heater chip.