Line printer head and image forming apparatus including the same

An image forming apparatus, comprising:

• an object to be exposed with light;
• a line printer head including a plurality of light emitting devices and an integrated circuit each formed on a substrate, the line printer head being configured to form an electrostatic latent image on the object by radiating light to the object along a main scanning direction;
• and
• a developer unit configured to develop the electrostatic latent image into a visible toner image by supplying toner to the electrostatic latent image formed on the object,
• wherein the plurality of light emitting devices are arranged in a linear arrangement corresponding to the main scanning direction, each of the plurality of light emitting devices including a light emitting region configured to generate light, a first electrode disposed on a lower portion of the light emitting region, a second electrode disposed on an upper portion of the light emitting region and an optical waveguide disposed above the second electrode, the second electrode being configured to allow therethrough transmission of the light generated by the light emitting region, the optical waveguide being configured to receive the light generated by the light emitted region, and to guide the light to output through an output opening defined on the optical waveguide, and
• wherein the integrated circuit is configured to drive the plurality of light emitting devices, the integrated circuit having a plurality of output terminals, each of which being connected to the first electrode of a respective corresponding one of the plurality of light emitting devices.