Patent ID: 8237360

Claim:
A color display device comprising a plurality of pixels on a substrate, wherein each pixel comprises a plurality of sub-pixels, the sub-pixels each emitting light of different wavelengths in the visible range, and further comprises a white sub-pixel, wherein: the plurality of sub-pixels and the white sub-pixel each have a white organic electroluminescence layer interposed between an optically semitransparent reflection layer and a light reflection layer, the optical distance between the optically semitransparent reflection layer and the light reflection layer in each of the plurality of sub-pixels forms a resonator having a distance for resonating emitted light, the optical distance between the optically semitransparent reflection layer and the light reflection layer in the white sub-pixel is longer than the maximum optical distance between the optically semitransparent reflection layer and the light reflection layer in each of the plurality of sub-pixels, the substrate is a substrate of a TFT, and at least one of the sub-pixels has a planarizing film on the substrate and has the light reflection layer either between the planarizing film and the substrate or in the planarizing film, and the plurality of sub-pixels and the white sub-pixel each have a white organic electroluminescence layer having the same composition, sub-pixels other than the sub-pixels having the light reflection layer between the planarizing film and the substrate or in the planarizing film have an optical path length regulation layer between the optically semitransparent reflection layer and the light reflection layer, and the thickness of the optical path length regulation layer varies among the sub-pixels.