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Article comprising microcavity light sources

  • US 5,405,710 A
  • Filed: 11/22/1993
  • Issued: 04/11/1995
  • Est. Priority Date: 11/22/1993
  • Status: Expired due to Term
First Claim
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1. An article comprising a layer structure on a major surface of a substrate body, said layer structure comprisinga) spaced apart first and second reflector means and an active layer that comprises organic material capable of electroluminescence, with at least a first portion of the active layer between said reflector means, said first and second reflector means defining a first microcavity of effective optical length L1 ;

  • andb) means that facilitate application of an electric field across the first portion of the active layer such that the first microcavity can be caused to emit radiation of a first color;

    CHARACTERIZED IN THAT the layer structure further comprisesc) spaced apart third and fourth reflector means, with a second portion of the active layer between said third and fourth reflector means, said third and fourth reflector means defining a second microcavity of effective optical length L2 different from L1 and spaced apart from the first microcavity; and

    d) means that facilitate application of an electric field across the second portion of the active layer, such that the second microcavity can be caused to emit radiation of a second color different from the first color.

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