Patent ID: 6583805
Filing Date: 2003-06-24
Classification: B41J,H01L

Abstract:
An exposure unit, for an image forming apparatus using an electrophotographic system, comprising a luminescent device array including plural luminescent sections, each comprising a pair of electrodes and an organic compound layer disposed between the electrodes, and a microlens array formed on a surface of a substrate provided with the organic compound layer, the microlens array including plural microlenses, each microlens being arranged on one side of a corresponding luminescent section,wherein the surface of the substrate provided with the organic compound layer is also provided with a dielectric layer and a focal length of each microlens is smaller than a thickness of the dielectric layer between the microlens and the corresponding luminescent section of the luminescent device array, and wherein the luminescent sections are formed by intersecting regions of the pair of electrodes, formed in a criss-crossing pattern such that the organic compound layer contacts both electrodes and the dielectric layer.