Patent ID: 8890136

Claim:
A planar light emitting device comprising: an organic electroluminescent element module unit in which plural organic electroluminescent elements are arranged side by side, each of the organic electroluminescent elements including an anode, a light emitting layer and a cathode that are formed on a first surface side of a first transparent substrate; a second transparent substrate disposed on a light extraction side of the organic electroluminescent element module unit; and a protector designed to, together with the second transparent substrate, enclose the organic electroluminescent element module unit; wherein the organic electroluminescent element includes: a light emitting portion defined as an overlap of the first transparent substrate, the anode, the light emitting layer and the cathode in a thickness direction of the first transparent substrate; a first through hole wire that is formed inside a first through hole and is electrically connected to the anode, the first through hole penetrating a first part of the anode that is formed outside the light emitting portion and the first transparent substrate; and a second through hole wire that is formed inside a second through hole and is electrically connected to the cathode, the second through hole penetrating a second part of the cathode that extends on the first surface of the first transparent substrate and the first transparent substrate, and an external connection electrode for receiving high potential and an external connection electrode for receiving low potential which serve to supply power to the organic electroluminescent element module are disposed on a first surface side of the second transparent substrate so as to avoid a projection region of the light emitting portion.