Patent ID: 8569946

Claim:
An organic light emitting display device, comprising: a first substrate comprising a single layer or multiple layers; a second substrate comprising a single layer or multiple layers, the second substrate comprising an inner surface facing the first substrate and an outer surface facing away from the first substrate; an array of organic light emitting pixels formed on the first substrate and interposed between the first and second substrates, the array comprising a top surface opposing the inner surface of the second substrate, wherein the top surface and the inner surface has a gap therebetween with a gap distance smaller than about 300 μm; a frit seal interconnecting the first and second substrates while surrounding the array, wherein the frit seal, the first substrate and the second substrate in combination define a sealed enclosed space in which the array is located such that the gap distance is smaller than about 300 μm; and an antireflection layer formed over at least one of the inner and outer surfaces of the second substrate, wherein the antireflection layer consists of a single layer of AlF 3 .