Electroluminescence element
First Claim
1. An electroluminescence element in which a plurality of layers including at least a transparent electrode layer, a back electrode layer, and at least one layer including an electroluminescent layer disposed between said back electrode layer and said transparent electrode layer, wherein said transparent electrode layer is formed on a transparent substrate, so as to emit light upon the application of an electric field between said transparent electrode layer and said back electrode layer;
- wherein a thin film layer for preventing electroluminescent light from being reflected on paths from said luminescent layer to said transparent substrate is disposed at an intervening portion between said transparent substrate and said electroluminscent layer and a refractive index of said thin film layer changes in a direction from the transparent substrate toward the electroluminesecent layer.
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Accused Products
Abstract
In an EL element of this invention, a thin film layer is formed between a transparent substrate and a layer formed adjacent to the transparent substrate, and the refractive index of the thin film layer is changed to be approximated to those of these layers toward the interfaces between the thin film layer and the corresponding layers, so that a difference in refractive index at these interfaces is minimized. The thin film layer may be formed between at least two adjacent layers formed on the transparent substrate.
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Citations
9 Claims
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1. An electroluminescence element in which a plurality of layers including at least a transparent electrode layer, a back electrode layer, and at least one layer including an electroluminescent layer disposed between said back electrode layer and said transparent electrode layer, wherein said transparent electrode layer is formed on a transparent substrate, so as to emit light upon the application of an electric field between said transparent electrode layer and said back electrode layer;
wherein a thin film layer for preventing electroluminescent light from being reflected on paths from said luminescent layer to said transparent substrate is disposed at an intervening portion between said transparent substrate and said electroluminscent layer and a refractive index of said thin film layer changes in a direction from the transparent substrate toward the electroluminesecent layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
Specification