Patent ID: 7623199

Claim:
An electroluminescent device comprising: first, second and third optical output parts, each of which emit lights having different wavelengths from each other, each optical output part comprising a light-emitting layer and a resonator structure that resonates light emitted from the light-emitting layer, wherein a first emission peak wavelength represents a wavelength at which an emission spectrum of the light from the first optical output part reaches a first maximum intensity value, a second emission peak wavelength represents a wavelength at which an emission spectrum of the light from the second optical output part reaches a second maximum intensity value, and a third emission peak wavelength represents a wavelength at which an emission spectrum of the light from the third optical output part reaches a third maximum intensity value, wherein a visibility spectrum curve represents a spectrum curve of a relationship between a wavelength of light and a sensitivity of human eye, wherein the visibility spectrum curve comprises a first inclination value at the first emission peak wavelength, a second inclination value at the second emission peak wavelength, and a third inclination value at the third emission peak wavelength, the second inclination value being greater than the first inclination value, and the third inclination value being greater than the second inclination value, and wherein a second width of the emission spectrum of the second optical output part is larger than a first width of the first optical output part, and a third width of the emission spectrum of the third optical output part is larger than the second width of the second optical output part.