Patent ID: 8513882

Claim:
A color display device comprising a plurality of pixels on a substrate, wherein each pixel comprises a plurality of sub-pixels, each sub-pixel emits 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, and 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, wherein the substrate is a substrate of a TFT, wherein the light reflection layer of the white sub-pixel is formed at a layer common with an electrode of the TFT.