Patent ID: 6789870
Filing Date: 2004-09-14
Classification: B41J,H04N

Abstract:
A method of calibrating a device having a first fluid source that ejects a first drop quantity and a second fluid source that ejects a second drop quantity, comprising:printing a pattern having a first portion and a second portion, wherein the first portion is printed by the first fluid source and the second portion is printed by the second fluid source; scanning the pattern to obtain a signal response; obtaining a relationship between the first drop quantity and the second drop quantity from the pattern based on the signal response, the signal response including a first portion response and a second portion response, and wherein the obtaining of the relationship includes comparing the first portion response with the second portion response, determining an intersection point between a calculated value of the first portion response and the second portion response, and determining the fill density of the first portion at the intersection point; and adjusting data used to determine quantities of fluid to eject from the first fluid source or the second fluid source based on the relationship between the first drop quantity and the second drop quantity.