Patent ID: 7919916

Claim:
A light-emitting device comprising: a light-emitting element having a substrate, a first electrode layer, a translucent semi-reflective layer, and a light-emitting functional layer disposed between the first electrode and the translucent semi-reflective layer; a reflective layer between the substrate and the first electrode; and a color filter which is disposed at the opposite side of the light-emitting functional layer with the translucent semi-reflective layer therebetween and transmits light which passed through out the translucent reflective layer, wherein an optical path d 1 which is a way from the reflective layer to the translucent semi-reflective layer is a value between d 1a calculated by expression 1 and d 1b calculated by expression 2, wherein d 1a =(p+1/2)·λ/2−(φ 1 −φ 2 )·λ/4π−n z ·t z (expression 1), and d 1b =m·λ/2+(φ 3 +φ 2 )·λ/4π (Expression 2), wherein λ is a wavelength at a peak transmittance of the color filter, φ 1 is a phase change when light of a wavelength λ, which advances toward the translucent semi-reflective layer from the opposite side of the light-emitting functional layer, reflects from an interface of the translucent semi-reflective layer, which is at the opposite side of the light-emitting functional layer, φ 2 is a phase change when the light of a wavelength λ, which advances toward the reflective layer from the light-emitting functional layer, reflects from the reflective layer, and φ 3 is a phase change when the light of a wavelength λ, which advances toward the translucent semi-reflective layer from the light-emitting functional layer, reflects from the interface of the translucent semi-reflective layer which is at the opposite side of light-emitting functional layer side wherein p is a positive integer, m is a positive integer, n z is a reflectance of the translucent semi-reflective layer with respect to the light of a wavelength λ and t z is a thickness of the translucent semi-reflective layer.