Patent ID: 8269227

Claim:
A light emitting device comprising: a color conversion layer and a blue color filter, each formed over and in direct contact with a same surface; a smoothing layer formed over the color conversion layer and the blue color filter; a base insulating film formed over the smoothing layer; a thin film transistor formed over the base insulating film, wherein the thin film transistor includes a semiconductor layer and a gate electrode with a gate insulating film interposed therebetween; an interlayer insulating film formed over the gate electrode; and a first light emitting element and a second light emitting element, each comprising a pair of electrodes, a light emitting layer, and a layer sandwiched between the pair of electrodes, wherein first light is emitted from the first light emitting element through the blue color filter, wherein the color conversion layer absorbs second light emitted from the second light emitting element and generates third light with a longer wavelength than a wavelength of the second light, wherein the layer includes a buffer layer containing a composite material comprising an organic compound which has a hole transporting property and a metal oxide, and wherein the semiconductor layer does not overlap the blue color filter and the color conversion layer.