Patent ID: 8213816
Filing Date: 2012-07-03
Classification: G03G

Abstract:
1. A method for compensating for an image quality defect in an image printing system comprising at least one marking station, the at least one marking station comprising a charging device for charging an image bearing surface, an exposing device for irradiating and discharging the image bearing surface to form a latent image, a developer unit for developing toner to the image bearing surface, and a transfer unit for transferring toner from the image bearing surface to an image accumulation surface, the method comprising: sensing the image quality defect on the image bearing surface using an electrostatic voltmeter (ESV) in the image printing system; determining at least an amplitude of the image quality defect by a processor; comparing the amplitude of the image quality defect to a predetermined threshold value; and compensating for the image quality defect by modulating a power of the exposing device during an expose process if the amplitude of the image quality defect is greater than the predetermined threshold value.