LED signal light with visible and infrared emission
The present disclosure is directed to a light emitting diode (LED) signal light. In one embodiment, the LED signal light includes at least one visible LED, at least one infrared (IR) LED, a reflector, wherein the reflector collimates a light emitted from the at least one visible LED and a light emitted from the at least one IR LED and a power supply powering the at least one visible LED and the at least one IR LED.
1. A light emitting diode (LED) aircraft obstruction beacon light, comprising:
at least one visible LED;
a plurality of infrared (IR) LEDs;
a plurality of resistors, where a respective one resistor of the plurality of resistors is coupled in series to a respective one IR LED of the plurality of IR LEDs;
a reflector, wherein the reflector is for collimating a light emitted from the at least one visible LED and a light emitted from each one of the plurality of IR LEDs; and
a power supply for powering on the at least one visible LED and the plurality of IR LEDs at a same time, wherein the at least one visible LED and the plurality of IR LEDs are electrically connected in a series-parallel configuration that alternates between a single one of the at least one visible LED and the plurality of IR LEDs in series, wherein the plurality of IR LEDs is connected in parallel and the respective one resistor of the plurality of resistors ensures sharing of a current between the plurality of IR LEDs that is connected in parallel.
2. The LED aircraft obstruction beacon light of claim 1 , wherein the at least one visible LED and the plurality of IR LEDs are placed linearly along a common extrusion axis of the reflector.
3. The LED aircraft obstruction beacon light of claim 1 , wherein the at least one visible LED comprises a red-orange aluminum indium gallium phosphide (AlInGaP) LED and emits a light at a wavelength with a peak wavelength of between 610 nanometers (nm) to 630 nm.
4. The LED aircraft obstruction beacon light of claim 3 , wherein the plurality of IR LEDs emits a light with a peak wavelength at between 800 nm and 900 nm.
5. The LED aircraft obstruction beacon light of claim 1 , wherein the reflector comprises at least one of: aluminum, gold or silver.
6. The LED aircraft obstruction beacon light of claim 1 , wherein a failure of the at least one visible LED or the plurality of IR LEDs creates a high impedance that signals a failure of the LED aircraft obstruction beacon light.
7. A light emitting diode (LED) signal light, comprising:
a plurality of reflectors;
at least one visible LED associated with each one of the plurality of reflectors;
a plurality of infrared (IR) LEDs associated with each one of the plurality of reflectors, wherein a respective one of the plurality of reflectors is for collimating a light emitted from the at least one visible LED and a light emitted from the plurality of IR LEDs;
a plurality of resistors, where a respective one resistor of the plurality of resistors is coupled in series to a respective one IR LED of the plurality of IR LEDs; and
a power supply for powering on the each one of the at least one visible LED associated with the each one of the plurality of reflectors and the each one of the plurality IR LEDs associated with the each one of the plurality of reflectors at a same time, wherein the each one of the at least one visible LED associated with the each one of the plurality of reflectors and the each one of the plurality of IR LEDs associated with the each one of the plurality of reflectors are electrically connected in a series-parallel configuration that alternates between a single one of the at least one visible LED and the plurality of IR LEDs in series, wherein the plurality of IR LEDs is connected in parallel and the respective one resistor of the plurality of resistors ensures sharing of a current between the plurality of IR LEDs that is connected in parallel.
8. The LED signal light of claim 7 , wherein the at least one visible LED and the plurality of IR LEDs are placed linearly along an extrusion axis of a respective reflector.
9. The LED signal light of claim 7 , wherein the at least one visible LED comprises a red-orange aluminum indium gallium phosphide (AlInGaP) LED and emits a light at a wavelength with a peak wavelength of between 610 nanometers (nm) to 630 nm.
10. The LED signal light of claim 9 , wherein the plurality of IR LEDs emits a light with a peak wavelength at between 800 nm and 900 nm.
11. The LED signal light of claim 7 , wherein each one of the plurality of reflectors comprises at least one of: aluminum, gold or silver.
12. The LED signal light of claim 7 , wherein a failure of any one of the at least one visible LED associated with the each one of the plurality of reflectors or any one of the plurality of IR LEDs associated with the each one of the plurality of reflectors creates a high impedance that signals a failure of the LED signal light.
13. A signal light, comprising:
at least one visible light emitting diode (LED);
a plurality of IR LEDs;
a plurality of resistors, where a respective one resistor of the plurality of resistors is coupled in series to a respective one IR LED of the plurality of IR LEDs;
a reflector cup coupled to each one of the at least one visible LED and the plurality of IR LEDs, wherein the reflector cup is for collimating light emitted from a respective one of the at least one visible LED and the plurality of IR LEDs; and
a power supply for powering on the at least one visible LED and the plurality of IR LEDs at a same time, wherein the at least one visible LED and the plurality of IR LEDs are electrically connected in a series-parallel configuration that alternates between a single one of the at least one visible LED and the plurality of IR LEDs in series, wherein the plurality of IR LEDs is connected in parallel and the respective one resistor of the plurality of resistors ensures sharing of a current between the plurality of IR LEDs that is connected in parallel.