US Patent 7019458 Electroluminescent display device

In an organic EL panel having a device glass substrate provided with an organic EL element on a surface thereof, a sealing glass substrate attached to the device glass substrate and a desiccant layer formed on a surface of the sealing glass substrate, spacers are disposed between a cathode of the organic EL element and the desiccant layer. A heat-conductive layer can be formed on a surface of the sealing glass substrate including a pocket portion. The heat-conductive layer can be formed by vapor depositing or sputtering a metal layer such as a Cr layer or an Al layer. This inhibits damaging the organic EL element and increases a heat dissipating ability, thereby inhibiting deterioration of a device property caused by temperature rise.