Patent ID: 7737464

Claim:
An organic light emitting apparatus, comprising: a substrate; and a plurality of organic light emitting devices having different emission colors to each other formed on the substrate, each of the plurality of organic light emitting devices including an optically-reflective cathode, an electron injection layer which is in contact with the cathode, organic compound layers including a light emitting layer, and an optically-transparent anode, the electron injection layer including an organic compound and at least one of an alkali metal, an alkaline earth metal, an alkali metal compound, and an alkaline earth metal compound, wherein the organic compound layers except the light emitting layer in each of the organic light emitting devices have the same thickness without depending on the different emission colors, a thickness of the electron injection layer in each of the organic light emitting devices is different from each other, and an optical distance between a light emission position in the light emitting layer and a reflection surface of the cathode in each of the plurality of organic light emitting devices is an uneven multiple of λ/4 with respect to a peak wavelength of λ, light emitted from the light emitting layer.