Patent ID: 8570543
Filing Date: 2013-10-29
Classification: G03G,G06K

Abstract:
1. A computer-based method for improving xerographic voltage uniformity in an image recording apparatus, comprising: storing, in a memory element for at least one specially programmed general purpose computer, correction data for a plurality of locations on a photoconductive layer of a photoreceptor for the image recording apparatus; inducing a charge, using a processor for the at least one specially programmed general purpose computer, on the photoconductive layer; receiving, using the processor, image data for producing an image using the apparatus, the image data including, for said each location in the plurality of locations, one of a first or second desired voltage level; calculating, using the processor, the correction data, and the image data, respective desired output power levels for a plurality of light emitting diodes (LEDs) in a printbar for the apparatus, aligned with the plurality of locations, to discharge said each location to the one of the first or second desired charge level, the respective desired output power levels selected to compensate for variances of respective induced charge levels at the plurality of locations; and, supplying, using the processor, respective power inputs to the plurality of LEDs to generate the respective desired output power levels.