Patent ID: 6889016
Filing Date: 2005-05-03
Classification: G03G

Abstract:
1. An image forming apparatus comprising: a photosensitive body; a charger which charges the photosensitive body; a laser scanning unit (LSU) which forms an electrostatic latent image by radiating light onto the photosensitive body; a developing unit which develops the electrostatic latent image by supplying a developing agent to the photosensitive body to form an image; a transfer unit which transfers the developed image onto a sheet of paper; a surface potential measuring unit disposed on a surface of the photosensitive body between the developing unit and the transfer unit to measure first and second surface potentials of the photosensitive body before and after a development voltage is supplied to the developing unit, respectively; a comparator which compares the first surface potential of the photosensitive body with the second surface potential of the photosensitive body to calculate a deviation between the first and second surface potentials; and a controller which sets a new development voltage to be supplied to the developing unit and controls the developing unit if the deviation is larger than a reference value.