Infrared light emitting diodes
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United States of America Patent
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Feb 1, 2005
Grant Date -
N/A
app pub date -
Jul 25, 2001
filing date -
Jul 4, 1998
priority date (Note) -
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Abstract
An infrared light emitting diode arrangement comprising an infrared light emitting diode which emits positive luminescence when forward biased and emits negative luminescence when reverse biased. The diode is driven by an alternating forward and reverse bias input so that the difference in output power between the positive luminescence and the negative luminescence of the light emitting diode is stabilised with respect to temperature. The infrared light emitting diode arrangement has particular application as a source in gas sensors and reduces or eliminates temperature control requirements for infrared light emitting diode sources.
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