Patent ID: 9590140
Date: 2017-03-07
CPC Classifications: G01N,H01L

Claim:
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.