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Electroluminescence element

  • US 5,003,221 A
  • Filed: 08/26/1988
  • Issued: 03/26/1991
  • Est. Priority Date: 08/29/1987
  • Status: Expired due to Fees
First Claim
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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.

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