Lighting Fixture And Light-Emitting Diode Light Source Assembly

摘要

An improved LED light source assembly is described, suitable for use as a retrofit for prior lighting fixtures of a kind including a concave reflector, an incandescent lamp positioned with its filament(s) at or near a focal region of the reflector, and a lens assembly for projecting light reflected by the reflector to a distant location, e.g., a theater stage. The improved LED light source assembly includes a compact arrangement of three or more LED assemblies, which are mounted at the forward end of an elongated heat pipe. The heat pipe's rearward end attaches to a heat sink mountable on the back side of the lighting fixture's concave reflector, and the heat pipe extends through a central hole in the reflector to position the LED assemblies at or near the concave reflector's focal region. The concave reflector reflects light emitted by the LED assemblies forward to the lighting fixture's lens assembly, which in turn projects a beam of light to a distant location. The LED light engine's configuration allows a significant proportion of the prior lighting fixture to continue to be utilized, leading to substantial cost saving and simplified installation.

主权项

1. A light source assembly configured for attachment to a lighting fixture of a type having a concave reflector and projecting light forward along a longitudinal fixture axis, wherein the concave reflector includes a central opening aligned with the longitudinal fixture axis, the light source assembly comprising:
three or more LED assemblies; a heat sink; an elongated support having a rearward end operatively connected to the heat sink and a forward end that mounts the three or more LED assemblies and that is sized to extend through the central opening of the concave reflector, wherein the forward end defines a longitudinal light source axis; and a fastener assembly configured for attachment to the lighting fixture, with the heat sink located on the backside of the concave reflector and the forward end of the elongated support extending through the central opening of the concave reflector such that the light source axis is aligned with the fixture axis and the three or more LED assemblies are located at or near a focal region of the concave reflector; wherein, in operation, with the light source assembly attached to the lighting fixture, light emitted from the three or more LED assemblies is reflected by the concave reflector to the lens assembly, which in turn projects the light forward along the longitudinal fixture axis, and heat generated by the LED assemblies is conducted rearward along the elongated support to the heat sink.