| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an organic EL light-emitting device which can minimize an in-plane luminance unevenness over a long period of time. <P>SOLUTION: The organic EL light-emitting device of the present invention is such that the principal plane on one side is a light-emitting main surface having a luminous plane capable of emitting light evenly over the entire surface in a light-emitting direction, and the principal plane on the other side is a non light-emitting main surface. In this light-emitting device, there are included a light-emitting element having at least a transparent substrate, a transparent electrode layer, an organic light-emitting laminate and a metal electrode layer in that order from the light-emitting main surface toward the non light-emitting main surface on the other side and a heat diffusion sheet having higher thermal conductivity in an in-plane direction of the sheet than in a thickness direction thereof, the heat diffusion sheet having, in a non light-emitting direction perspective plan view, an end part curved in a non light-emitting direction inside a plane of the transparent substrate. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
