US 6,552,488 B1 · Organic electroluminescent device

Abstract

A color organic electroluminescent device includes color filters, light emitting layers and substrate integrated into a single assembly, with the light emitting layers lying between the substrate and the color filters. Unlike color electroluminescent devices where an image must be viewed through a transparent substrate, or where color filters are deposited upon another device and later combined with the assembly, the present disclosure calls for a transparent protective layer of silicon nitride or a similar material to be deposited over the light emitting layers to protect the light emitting layers from oxygen and moisture, and to serve as a platform for color filters. In order to achieve sufficient density in the protective layer and avoid defects, a cold plasma deposition or similar process is used for deposition of the protective layer. By viewing light through this protective layer instead of a substrate, nearly any substrate can be used.

Claims19

Dependent claims

In an organic electroluminescent device having a substrate, light emitting layers on top of the substrate, the light emitting layers including two electrode layers and an organic electroluminescent material therebetween, and at least one color filter, an improvement comprising:

creating a transparent protective layer on top of the light emitting layers, such that the light emitting layers lie between the substrate and the transparent protective layer;
and
layering the color filter above the transparent protective layer, such that both the light emitting layers and the transparent protective layer lie in between the substrate and the color filter.

Dependencies are inferred from the claim text.

Organic electroluminescent device

Life of this patent

Organic electroluminescent device

Life of this patent

Abstract

Claims19