Patent ID: 6507714
Filing Date: 2003-01-14
Classification: G03G,H04N

Abstract:
A method for operating an electrophotographic printer or copier device, comprising the steps of:illuminating a first part of image features on a charged photoconductor region with a predetermined illumination energy by an illumination device, a second part of the image features on the photoconductor region not being illuminated, determining a raster factor from a ratio of a number plurality of image features of the first part to a number of image features of the second part; acquiring an electrical potential of the photoconductor region after the illuminating step; and determining an adapted illumination energy on a basis of an approximation for a current characteristic of the photoconductor by taking the raster factor determined in said determining step and the electrical potential acquired in said acquiring step into consideration for a printing event, said adapted illumination energy opposing an influence of a deviation of a current characteristic of the photoconductor from a rated characteristic on the printing event.