Patent ID: 7710025

Claim:
A color display unit using an organic electroluminescence device comprising: a semi-transparent reflective layer; a reflective layer; and an organic layer including a light emitting layer interposed between the semi-transparent reflective layer and the reflective layer, the semi-transparent reflective layer and the reflective layer forming a resonant cavity, wherein, said resonant cavity has an optical path length L determined such that a spectrum peak shift produced by a difference of viewing angles in the 0° to 60° range is less than 30 nm, said optical path length L has a positive minimum value in a range that satisfies the equation (2L)/λ+Φ/(2π)=m, where (a) m is an integer, (b) Φ in radians is the sum of phase change amounts to reflection of the light emitted from the light emitting layer at both boundaries of the resonant cavity, and (c) λ is the peak wavelength of the spectrum extracted from the display device, and the color display unit is a color television apparatus.