Patent ID: 8384073

Claim:
A system for displaying images, comprising: a full-color organic electroluminescent device, comprising: a first electrode; a first emitting layer, a second emitting layer, and a third emitting layer, sequentially disposed on the first electrode, wherein the first emitting layer has a first dopant doped therein, the second emitting layer has a second dopant doped therein, the third emitting layer has a third dopant doped therein, and the energy gap E 1 of the first dopant, the energy gap E 2 of the second dopant, and the energy gap E 3 of the third dopant are different from one another; a blocking layer, wherein the blocking layer is disposed between the first emitting layer and the second emitting layer and the second emitting layer directly contacts the third emitting layer, or the blocking layer is disposed between the second emitting layer and the third emitting layer and the first emitting layer directly contacts the second emitting layer; and a second electrode, disposed on the third emitting layer.