RED AlGaAs LIGHT-EMITTING DIODES.

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Steranka, Frank M.
DeFevere, Dennis C.
Camras, Michael D.
Tu, Chin-Wang
McElfresh, David K.
Rudaz, SErge L.
Cook, Louis W.
Snyder, Wayne L.
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HP has recently released indicator and display products containing a new type of red light-emitting diode (LED) based on the aluminum gallium arsenide (AlGaAs) materials system. These LEDs offer a significant improvement in efficiency over the red LEDs that have previously been available but cost only slightly more. This paper provides an overview of the different types of AlGaAs devices that are available and compares their performance to that of the other red LED technologies.
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