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Optical interference, electroluminescent device having low reflectance

  • US 5,049,780 A
  • Filed: 09/29/1989
  • Issued: 09/17/1991
  • Est. Priority Date: 12/02/1988
  • Status: Expired due to Term
First Claim
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1. An optical interference, electroluminescent device having low reflectance, comprising:

  • (a) an electroluminescence transmitting, electro-optical, front electrode, comprising at least one layer,(b) an electro-optical counter electrode, disposed to the rear of the front electrode and comprising at least one layer,(c) an electro-optical electroluminescent member, comprising at least one layer, and disposed between the front electrode and the counter electrode, and(d) at least one optical interference member disposed in said electroluminescent device such that at least an optical interference member is in interfacial contact with a front face of the counter electrode, the optical interference member comprising at least one optical interference film which is substantially transparent to ambient light and is of a thickness and material such that the spectral reflectance of said electroluminescent device is so modified that the reflectance of ambient light by the electroluminescent device towards a viewer is reduced.

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