Patent ID: 6695423
Filing Date: 2004-02-24
Classification: B41J

Abstract:
An ink jet apparatus provided with an ink jet head having a nozzle for ejecting ink drops and capable of increasing or decreasing ink drop volume ejected from the nozzle depending on parameters of a driving signal applied, the ink jet apparatus comprising:a volume input device for inputting unit volume representing total ink drop volume to be ejected within a unit area; a parameter determination device for determining the parameters of the driving signal to be applied to the ink jet head based on the unit volume inputted by the volume input device; and a reference volume calculation device for calculating reference volume representing the total ink drop volume ejected within the unit area when a reference driving signal having reference parameters representing a basis is applied to the ink jet head, wherein the parameter determination device modifies the reference parameters so that a difference between the reference volume and the unit volume is equal to or lower than a predetermined threshold, and determines the modified reference parameters as the parameters of the driving signal to be applied to the ink jet head.