Patent ID: 8138667

Claim:
A light-emitting device comprising: first to third light-emitting elements, each of the first to third light-emitting elements comprising: a first electrode over a substrate; an electroluminescent layer comprising: a layer comprising a metal oxide and an organic compound over and in contact with the first electrode, a second electrode over the electroluminescent layer, a color filter comprising a first coloring layer over the first light-emitting element, a second coloring layer over the second light-emitting element, and a third coloring layer over the third light-emitting element, wherein light emitted from the first light-emitting element has a first spectrum, wherein light emitted from the second light-emitting element has a second spectrum, wherein light emitted from the third light-emitting element has a third spectrum, wherein light in a first wavelength range of the first spectrum can be selectively extracted by the first coloring layer, wherein light in a second wavelength range of the second spectrum can be selectively extracted by the second coloring layer, and wherein light in a third wavelength range of the third spectrum can be selectively extracted by the third coloring layer.