Patent ID: 6229627
Filing Date: 2001-05-08
Classification: H04N

Abstract:
An image forming apparatus comprising:an image illuminating light source for alternately illuminating a density reference member disposed at a position adjacent to an image to be read and the image to be read;an illuminating driving means for supplying power to said image illuminating light source;an image reading means for photoelectrically converting reflected light from said density reference member illuminated by said image illuminating light source to reference data and also photoelectrically converting reflected light from the image to be read to image data;an A/D converting means for subjecting the reference data as well as image data outputted from said image reading means to A/D conversion;a data correcting means for executing shading correction to the image data subjected to A/D conversion with said A/D converting means according to the reference data;a data storage means in which correction data for reduction of power to be supplied to said illumination driving means is previously set;a start detecting means for detecting the fact that driving of said image illuminating light source by said illumination driving means is started in a prespecified reference time; anda light emission correcting means for reducing power to be supplied to said image illuminating light source from said illumination driving means according to the correction data set in said data storage means when an output from said start detecting means is detected.