Exposure device, image forming apparatus, and computer-readable medium

An image forming apparatus comprising:

• a photosensitive body;
• an exposure device having a plurality of light emitting elements that expose the photosensitive body to form an electrostatic latent image;
• and
• a developer that develops the electrostatic latent image with a toner, wherein
• the exposure device includes
• an exposure section having the plurality of light emitting elements,
• a load,
• a first supplying unit that supplies a driving current to one of (i) light emitting elements which are used to form an image among the plurality of light emitting elements and (ii) the load, in accordance with a modulation signal, wherein the first supplying unit supplies a bias current to the other, and
• a second supplying unit that supplies the bias current to light emitting elements which are not used to form the image among the plurality of light emitting elements, regardless of the modulation signal.