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Bi-directional dual-color light emitting device and systems for use thereof

  • US 9,590,140 B2
  • Filed: 07/01/2015
  • Issued: 03/07/2017
  • Est. Priority Date: 07/03/2014
  • Status: Active Grant
First Claim
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1. A two-terminal light emitting semiconductor device comprising:

  • a) A first and a second active regions having radiative recombination as dominant carrier recombination mechanism;

    b) a first carrier supply region of a first carrier type sandwiched between the first and the second active regions;

    c) a second carrier supply region of a second carrier type adjacent to the first active region in such a way that said first active region is sandwiched between the first carrier supply region and the second carrier supply region, the second carrier supply region connected to a first of the two semiconductor device terminals;

    d) a third carrier supply region of the second carrier type adjacent to the second active region in such a way that said second active region is sandwiched between the first carrier supply region and the third carrier supply region, the third carrier supply region connected to a second of the two semiconductor device terminals;

    wherein said two-terminal light emitting semiconductor device produces a first wavelength of light when biased with a first sign of a polarity of an electric bias, and produces a second wavelength of light when biased with a second sign of the polarity of the electric bias applied to the terminals of said light emitting semiconductor device wherein the second sign is opposite the first sign.

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