An image forming apparatus and a method of controlling a development voltage
include
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 the surface of the photosensitive
body between the developing unit and the transfer unit to measure a surface potential
of the photosensitive body, a comparator which compares the surface potential of
the photosensitive body before a development voltage is supplied to the developing
unit, with the surface potential of the photosensitive body after the development
voltage is supplied to the developing unit, to calculate a deviation, and a controller
which sets a new development voltage of the developing unit and controls the developing
unit if the deviation is larger than a reference value.
