Patent ID: 8598788

Claim:
A system for displaying images, comprising: an organic electroluminescent device, comprising: a substrate; a first electrode disposed on the substrate; an organic electroluminescent element disposed on the first electrode; a second electrode disposed on the organic electroluminescent element; and a first color tuning element disposed on the second electrode, the organic electroluminescent element is between the first color tuning element and the substrate, wherein the color tuning element has a thickness T 1 : 9500 Å≦T 1 ≦10500 Å, 11000 Å≦T 1 ≦12000 Å, 13500 Å≦T 1 ≦14500 Å, 16500 Å≦T 1 ≦17500 Å, or 18500 Å≦T 1 ≦19500 Å.