Light engine assemblies

• US 9,605,828 B2
• Filed: 11/13/2007
• Issued: 03/28/2017
• Est. Priority Date: 11/14/2006
• Status: Active Grant

• Current Assignee: IDEAL Industries Lighting, LLC (Ideal Industries Incorporated)
• Original Assignee: CREE Incorporated (Wolfspeed, Inc.)
• Inventors: Pickard, Paul Kenneth, Trott, Gary David
• Primary Examiner(s): HAN, JASON
• Application Number:
  US11/939,052
• Publication Number:
  US 20080112168A1
• Time in Patent Office: 3,423 Days
• Field of Search: 362/147, 362/249.02, 362/294, 362/364, 362/373, 362/800
• US Class Current: 1/1
• CPC Class Codes: F21S 41/50 characterised by aesthetic components not otherwise provided for, e.g. decorative trim, partition walls or covers
• CPC Class Codes: F21S 45/47 Passive cooling, e.g. using fins, thermal conductive elements or openings
• CPC Class Codes: F21S 8/026 intended to be recessed in a ceiling or like overhead structure, e.g. suspended ceiling
• CPC Class Codes: F21V 15/01 Housings, e.g. material or assembling of housing parts F21V15/02 takes precedence housings forming signs or letters G09F13/04
• CPC Class Codes: F21V 29/75 with fins or blades having different shapes, thicknesses or spacing
• CPC Class Codes: F21W 2131/401 for swimming pools
• CPC Class Codes: F21Y 2105/10 comprising a two-dimensional array of point-like light-generating elements
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

A light engine assembly, comprising at least one trim element, a light engine housing, and a light engine comprising at least one solid state light emitter. In some embodiments, an external surface of the light engine housing is in contact with an internal surface of the trim element. In some embodiments, the light engine assembly further comprises at least one thermal interface element positioned between and in contact with the light engine housing and the trim element. In some embodiments, the light engine assembly further comprises light engine housing fins which are in contact with the light engine housing and the trim element.

Claims

1. A light engine assembly, comprising:

at least one exterior element;

at least one interior element;

at least first and second heat dissipation fins; and

a light engine,

the exterior element having at least an exterior element first surface and an exterior element second surface,

the interior element having at least an interior element first surface and an interior element second surface,

at least a first portion of the exterior element second surface spaced radially from at least a first portion of the interior element first surface,

the first heat dissipation fin in contact with the first portion of the exterior element second surface and with the first portion of the interior element first surface,

the second heat dissipation fin in contact with the first portion of the exterior element second surface and with the first portion of the interior element first surface,

at least a first portion of the exterior element first surface substantially frustoconical,

the light engine within a first space defined by the exterior element second surface,

the light engine comprising at least a first solid state light emitter,

a second space defined by the exterior element, the interior element, the first heat dissipation fin and the second heat dissipation fin,

air able to enter the second space through a first opening at a first end of the second space and exit the second space through a second opening at a second end of the second space.

2. A light engine assembly as recited in claim 1, wherein:

the light engine assembly comprises a plurality of heat dissipation fins comprising at least the first and second heat dissipation fins, and

in a section along a first plane;

a cross-section of the exterior element is a first substantially circular shape,

a cross-section of the interior element is a second substantially circular shape,

a cross-section of each of the heat dissipation fins extends from the interior element to the exterior element,

the heat dissipation fins are spaced circumferentially relative to the first and second substantially circular shapes.

3. A light engine assembly as recited in claim 2, wherein:

the light engine assembly comprises at least eight heat dissipation fins, and

each heat dissipation fin is spaced circumferentially from at least one other heat dissipation fin by not more than 45 degrees.

4. A light engine assembly as recited in claim 1, wherein the light engine is within a third space defined by the interior element second surface.