Patent ID: 7518141

Claim:
A multicolor organic light emitting apparatus of a top-emission type, comprising: a substrate; and a plurality of organic light emitting devices which is formed on the substrate and comprises a first organic light emitting device for exhibiting a first luminescent color and a second organic light emitting device for exhibiting a second luminescent color which is different from the first luminescent color, wherein: the first organic light emitting device includes a light reflective cathode, an organic compound layer which contains a light emitting layer having an electron transportability, and a light transmissive anode formed in the stated order from a side of the substrate; the second organic light emitting device includes a light reflective cathode, an organic compound layer containing a light emitting layer which has an electron transportability and is formed with a material and a thickness different from those of the light emitting layer of the first organic light emitting device, and a light transmissive anode formed in the stated order from the side of the substrate; a thickness of a layer formed between the light emitting layer and a reflection surface of the cathode is the same as that of each of the first organic light emitting device and the second organic light emitting device; and an optical distance between a light emitting surface of each of the light emitting layers and the reflection surface of the cathode is adjusted such that each thickness of the light emitting layers is varied to enhance light emitted from the light emitting layers by optical interference.