Patent ID: 6876144

Claim:
An organic electroluminescent (EL) device, comprising: a first conductive layer having a first conductive type; a first host material layer formed on the topside of said first conductive layer, wherein said first host material layer is intermixed with a first guest luminescent material so as to cast a first color light source under a bias voltage; a second host material layer formed on the topside of said first host material layer, wherein said second host material layer is intermixed with a second guest luminescent material so as to cast a second color light source under said bias voltage; a third host material layer formed on the topside of said second host material layer, wherein said third host material layer is intermixed with a third guest luminescent material so as to cast a third color light source under said bias voltage; and a second conductive layer having a second conductive type formed on the topside of said third host material layer.