Patent ID: 7960910

Claim:
An organic light emitting display device, comprising: a substrate; a first electrode; an organic layer on the first electrode; a cathode electrode including a mixture of an opaque material and a light transmitting inorganic material dispersed therein; and an encapsulation layer on the cathode electrode and in direct contact with the cathode electrode, the encapsulation layer including at least one inorganic layer and at least one organic layer alternately arranged, and the at least one organic layer or the at least one inorganic layer being in direct contact with the cathode electrode, wherein: a density gradient of the opaque material in the cathode electrode gradually decreases along substantially an entire depth of the cathode electrode, and the density gradient decreases as a distance to the encapsulation layer decreases; and the density gradient of the opaque material is capable of minimizing interface reflection of light from the organic layer.