LED PAPI with condensation protection
First Claim
Patent Images
1. An apparatus (10), comprising:
- a plurality of legs (14);
a chassis (12) mounted on the plurality of legs (14); and
a light assembly (22), the light assembly comprising a first surface at the first end of the light assembly (22) and a second surface at the second end of the light assembly(22), the light assembly (22) comprising;
a light source (28) disposed at the first end of the light assembly (22),a first convex lens (32) disposed at the second end of the light assembly (22),a second convex lens (30) disposed inside the light assembly (22) between the first convex lens (32) and the light source (28),first seal (26) at the first end of the light assembly (22),a second seal (36) at the second end of the light assembly (22),a controller (60), anda defroster (39);
wherein the controller (60) is operable to receive an first input (62) indicating a temperature of the first surface and a second input (64) indicating ambient air temperature; and
wherein the controller (60) operates the light source (28) and the defroster (39) based on the temperature of the first surface and the ambient air temperature.
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Abstract
In accordance with an example embodiment, there is disclosed herein a LED PAPI (10) with condensation protection. The condensation protection may suitably comprise passive components, such as gaskets and seals (26, 36) and a desiccant (48), and/or active components, such as a defroster (39) and/or a heater (50).
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Citations
13 Claims
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1. An apparatus (10), comprising:
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a plurality of legs (14); a chassis (12) mounted on the plurality of legs (14); and a light assembly (22), the light assembly comprising a first surface at the first end of the light assembly (22) and a second surface at the second end of the light assembly(22), the light assembly (22) comprising; a light source (28) disposed at the first end of the light assembly (22), a first convex lens (32) disposed at the second end of the light assembly (22), a second convex lens (30) disposed inside the light assembly (22) between the first convex lens (32) and the light source (28), first seal (26) at the first end of the light assembly (22), a second seal (36) at the second end of the light assembly (22), a controller (60), and a defroster (39); wherein the controller (60) is operable to receive an first input (62) indicating a temperature of the first surface and a second input (64) indicating ambient air temperature; and wherein the controller (60) operates the light source (28) and the defroster (39) based on the temperature of the first surface and the ambient air temperature. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13)
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12. The apparatus (10) set forth in 1 the controller (60) operates the defroster (39) is while the light source (28) is switched off to allow the light source to be switched on instantly.
Specification