NASA NTRS · 19850000015
Double Light-Emitting Diode
Abstract
Two GaAs light-emitting diodes packaged as single unit offer greater reliability than conventional single-diode package. One diode is primary light source. If it fails, backup diode switched in. Each diode has separate power lead, so either or both switched on or off at same time.
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Johnson, R. L., Hall, T. C.. 1985-06-01. Double Light-Emitting Diode. https://ntrs.nasa.gov/citations/19850000015
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