Patent ID: 8921860

Claim:
An organic light emitting display device, comprising: a substrate having a plurality of R, G, B pixels; a thin-film transistor at each of the R, G, B pixels; an insulating layer on the thin-film transistor having a first refractive index; a light compensation layer on the insulating layer having a second refractive index different than the first refractive index; a plurality of pixel electrodes on the light compensation layer at each one of the R, G, B pixels; a light emitting unit on the respective pixel electrodes to emit light; and common electrode on the organic light emitting units, wherein the light compensation layer, the pixel electrode, and the organic light emitting unit in each pixel have the following relation: ∑ i ⁢ n i 0 ⁢ d i 0 λ b + n a ⁢ d a λ b + ∑ j ⁢ n j w ⁢ d j w λ b = 1.7 ∼ 2.5 where d 0 , d a , d w are thicknesses of the light compensation layer, pixel electrode and organic light emitting unit, respectively, n 0 , n a , n w are refractive indices of the light compensation layer, pixel electrode and organic light emitting unit, respectively, and λ b is the peak wavelength of blue-light emitted from the organic light emitting unit.