Low profile luminaire with light guide and associated systems and methods

摘要

A low profile luminaire to be carried by a lighting fixture. The luminaire may include a light source that comprises light-emitting diodes (LEDs), a heat sink thermally coupled to and disposed diametrically outboard of the light source, a reflector in optical communication with and disposed diametrically inboard of the light source, and a light guide in optical communication with at least one of the light source and the reflector and disposed therebetween. Light emitted from the light source may be reflected by the reflector into an edge of the light guide. Light propagating through the light guide may be projected into the environment at a uniform luminance. The luminaire may be dimensioned to cover a nominally sized four-inch can light fixture and/or electrical junction box. A method aspect of the invention details steps for assembling the low profile luminaire with light guide.

主权项

1. A luminaire comprising:
a heat sink; a light source carried by the heat sink and configured to emit a source light, the light source comprising
a heat spreader having an inner surface and an outer surface, anda plurality of light-emitting diodes (LEDs) disposed generally along an outer peripheral perimeter portion of the inner surface of the heat spreader, and positioned in thermal communication therewith; a reflector disposed generally coextensive with the plurality of LEDs and comprising an aperture formed in a medial region thereof, an outer edge of the aperture defining an inner rim of the reflector; a light guide positioned between the reflector and the light source, the light guide characterized, at any position along its width, by a height defined as the distance between the inner surface of the heat spreader and a plane defined by the inner rim of the reflector, the light guide configured to change the source light into a first shaped light; and a connector to secure the reflector, the light guide, and the light source to the heat sink; wherein the source light is emitted from the light source incident upon the reflector, and is changed by the light guide into the first shaped light that is directed by the light guide through the aperture.