Back to results
US 7,246,921 B2Granted
Back-reflecting LED light source
AssigneeIllumitech Inc.
InventorsBenjamin A. Jacobson, Robert D. Gengelbach
Life of this patent
Estimating the term…
Abstract
An LED light source using back-reflecting collection optics with a supporting structure and heat sink to block only a small amount of light. A reflector has a front and back side with an LED positioned on the front side of the reflector. A heat conducting body is positioned at least partially between the reflector and the LED. The heat conducting body provides a pathway for heat to flow from the LED toward the back side of the reflector.
Claims21
A light source comprising:
- a reflector having a front side and a back side;
- at least one light-emitting element associated with said reflector and positioned on said front side;
- a volume between said reflector and said light-emitting element;
- said volume substantially filled by paths of light rays connecting said light-emitting element with said reflector;
- a first heat-conducting body positioned at least partially within said volume;
- and
- said heat-conducting body providing a pathway for heat to flow from said light-emitting element toward said back side of said reflector.
4 more elements
A light source comprising:
- a reflector having a central optical axis;
- a light-emitting element positioned near said central optical axis;
- a volume between said reflector and said light-emitting;
- said volume substantially filled by paths of light rays connecting said light-emitting element with said reflector;
- a heat-conducting body comprising a central hub and at least one axial vane positioned at least partially within said volume;
- and
- said axial vane positioned predominantly in a plane containing said central optical axis, and said axial vane having a higher thermal conductivity in at least one direction within said plane than in the direction perpendicular to said plane.
4 more elements
A light source comprising:
- a reflector having a front side, a back side, and a central optical axis;
- at least one light-emitting element associated with said reflector and positioned on said front side;
- a first heat-conducting body comprising a central hub positioned near said optical axis and thermally coupled to said light-emitting element;
- at least one axial vane thermally coupled to said hub;
- said reflector redirecting the majority of light rays from said light-emitting element to exit said reflector toward said front side with said redirected rays lying in planes substantially parallel to said optical axis;
- said axial vane being positioned predominantly in one of said planes containing said optical axis;
- and
- said axial vane having two opposing flat sides predominantly parallel to said plane, and at least one edge perpendicular to said plane and facing said reflector, said edge being much smaller than either of said flat sides.
5 more elements
Dependencies are inferred from the claim text.