Patent ID: 8659220

Claim:
An organic electroluminescent lighting device comprising: an organic light-emitting film; a pair of electrode films that are stacked to face each other sandwiching the organic light-emitting film, the pair of electrode films being rectangular and different from each other in polarity, the pair of electrode films comprising power supply terminal sections which are connected to a power source, the power supply terminal sections each being edge sides which face each other at a surface of one of the electrode films; and an auxiliary electrode film group including at least one of a plurality of first belt-like auxiliary electrode films and a plurality of second belt-like auxiliary electrode films, the first auxiliary electrode films extending in a direction parallel to the edge sides and the second auxiliary electrode films extending in a direction perpendicular to the edge sides, the first auxiliary electrode films and the second auxiliary electrode films being located away from each other on the surface of one of the electrode films, wherein a sectional area viewed at a section where the plurality of first auxiliary electrode films is cut in the direction perpendicular to the edge sides increases in relation to an increasing distance of the first auxiliary electrode films from the edge sides, and a sectional area viewed at a section where the plurality of second auxiliary electrode films is cut in the direction parallel to the edge sides increases in relation to an increasing distance of the second auxiliary electrode films from the edge sides, and wherein the first auxiliary electrode films and the second auxiliary electrode films are formed on the surface of one of the electrode films that is in contact with a transparent substrate.