Patent ID: 7868528

Claim:
A light emitting device comprising: a light emitting element which includes a first electrode layer, a translucent semi-reflection layer, and a light emitting function layer disposed between the first electrode and the translucent semi-reflection layer; a reflection layer which reflects light emitted from the light emitting function layer toward the light emitting function layer; the translucent semi-reflection layer, which is disposed opposite the reflection layer with the light emitting function layer interposed therebetween to reflect some of the light emitted from the light emitting function layer toward the light emitting function layer and to transmit the remainder of the light, the translucent semi-reflection layer having a refractive index of 1 or more; a plurality of separators sandwiching the first electrode layer; a color filter which is disposed opposite the light emitting function layer with the translucent semi-reflection layer interposed between the color filter and the light emitting function layer to transmit the light transmitted through the translucent semi-reflection layer, wherein an optical distance between the reflection layer and an interface which is not opposite to the reflection layer in the translucent semi-reflection layer is determined on the basis of d 1 calculated from Formula (1): d 2 =( p+ 1/2)·λ/2−(φ 1 −φ 2 )·λ/4π (1), where λ is a wavelength corresponding to a peak of transmissivity of the color filter, φ 1 is a phase variation occurring when light having a wavelength λ traveling from an opposite side of the light emitting function layer to the translucent semi-reflection layer reflects from an interface opposite the light emitting function layer of the translucent semi-reflection layer, φ 2 is a phase variation occurring when light having a wavelength λ traveling from the light emitting function layer to the reflection layer reflects from the reflection layer, and p is a positive integer.