Bottom emission type organic electroluminescent panel
View Patent ↗Provided is a bottom emission type organic EL panel capable of preventing or delaying loss of light emission from an end portion of the light emission area and reduction of the light emission area in an organic EL element. This organic electro luminescence panel includes an organic electro luminescence element having at least one organic layer between an anode and a cathode arranged on a substrate. This panel has a main light emission area emitting light with a high luminance and a non-light emission area or a low light emission area emitting light with a lower luminance than the main light emission area, arranged outside the end portion of the main light emission area. By limiting the main light emission area to a smaller size than the cathode forming area, the end portion of the cathode forming area is arranged outside the end portion of the main light emission area.
1. A bottom emission type organic electroluminescent panel equipped with an electroluminescent element comprising an anode and a cathode on a substrate and at least one organic layer between the anode and the cathode,
wherein the electroluminescent panel comprises:
a main emission area emitting light with a high luminance; and
a non-emission area or a low emission area emitting light with a relatively lower luminance than that of the main emission area, the non-emission area or low emission area being located outside an edge portion of the main emission area,
provided that an edge portion of a cathode forming area is arranged outside the edge portion of the main emission area by limiting the main emission area to a smaller size than that of the cathode forming area,
wherein at least one electron injection layer is provided as a constituent layer of the organic layer and an area for forming the at least one electron injection layer is narrower than the cathode forming area, a portion of the at least one electron injection area being arranged outside an outer edge portion of the anode,
wherein all of the edge portions of the cathode forming area are arranged outside of the electron injection layer, and
wherein a portion of the organic layer is arranged outside of the cathode forming area.
2. The bottom emission type organic electroluminescent panel of claim 1 , wherein an emitted light is a white light.