Patent ID: 8502851
Filing Date: 2013-08-06
Classification: G03G,H04N

Abstract:
1. An image forming apparatus comprising: a photosensitive member; a light source configured to emit a laser beam used for exposing the photosensitive member based on a driving current; a deflection unit configured to deflect the laser beam so that the photosensitive member is scanned with the laser beam; an optical member configured to guide the laser beam deflected by the deflection unit onto the photosensitive member; a setting unit configured to set a reference voltage at which the light source emits the laser beam; an output unit configured to output correction data for correcting a light quantity of the laser beam according to an exposure position of the laser beam guided onto the photosensitive member by the optical member in a scanning direction in which the photosensitive member is scanned with the laser beam; a generation unit configured to generate an analog signal of a voltage based on the reference voltage and the correction data; a correction unit configured to correct the voltage of the analog signal based on a predetermined correction value set based on optical characteristics of the optical member wherein the correction unit multiplies the voltage of the analog signal generated by the generation unit by the predetermined correction value so as to correct the voltage of the analog signal; and a driving unit configured to supply, to the light source, the driving current of a value based on the voltage of the analog signal corrected by the correction unit and the reference voltage set by the setting unit.