Light emitting element array, method of forming the array and image forming apparatus

摘要

An exposure device having an array of a plurality of light emitting elements composed of at least an anode layer (2), a cathode layer (6) and one or more organic compound layers (7) interposed between the anode layer and the cathode layer all of which are formed on a substrate (1). In the exposure device, the quantity of light emitted from each light emitting element is made uniform by controlling the light emitting area of each light emitting element. Therefore, the exposure device eliminates differences in the quantity of emitted light among the plurality of light emitting elements without using a special drive circuit.