Patent ID: 7081871

Claim:
A light-emitting device comprising: a first emission layer formed apart from a light-emitting surface with a plurality of layers interposed therebetween, and having a first maximum wavelength region λ X ; and a second emission layer formed on said first emission layer to provide a laminated structure, the second emission layer having a second maximum wavelength region λ Y that is different from said first maximum wavelength region λ X , wherein a first optical film thickness range L 1 from a light-emitting position of said first emission layer to said light-emitting surface of the device, a second optical film thickness range L 2 from a light-emitting position of said second emission layer to said light-emitting surface, and respective film thicknesses of said plurality of layers, said first emission layer and said second emission layer are set, so as to increase the luminous intensity of color of an emission produced by mixing an emission from said first emission layer with an emission from said second emission layer.