Patent ID: 8238764

Claim:
An image forming apparatus, to which a development cartridge is configured to be detachably mounted, the development cartridge having a first memory storing therein cartridge information, the image forming apparatus comprising: an apparatus casing having a cover; an exposure unit having plural light emitting portions, the exposure unit being supported by the apparatus casing so that the light emitting portions face a photosensitive member rotatably supported by the apparatus casing; a reader unit disposed on the exposure unit and configured to read the cartridge information from the first memory when the development cartridge is mounted to the image forming apparatus; and a determining unit configured to determine both of an opening/closing state of the cover and a mounting state of the development cartridge based on whether or not the reader unit can read the cartridge information, wherein the exposure unit is a light emitting diode unit and the light emitting diode unit is attached on the cover.