Patent ID: 7784969
Filing Date: 2010-08-31
Classification: F21K,F21V,F21Y,H05B,Y02B

Abstract:
1. A light engine comprising: a thermally conductive housing configured for supporting a light module and a current driver circuit and for conducting heat away from the light module and the current driver circuit, the housing including a generally cylindrical wall disposed along a longitudinal axis of the housing and defining a cavity, the cylindrical wall includes an inner surface and an outer surface, a plurality of fins radiating outwardly from the outer surface of the cylindrical wall, each of the plurality of fins running length-wise parallel to the longitudinal axis of the housing, and an annular center wall extending inwardly from the inner surface of the cylindrical wall being substantially perpendicular to the longitudinal axis of the housing and dividing the cavity into a first, upper cavity and a second, lower cavity; the light module including at least one light emitting diode (LED) for producing visible light mounted to a circular metal core printed circuit board, the light module completely disposed in the first, upper cavity and the circular metal core printed circuit board being substantially in full contact with an upper surface of the annular center wall, wherein heat generated by the at least one LED is conducted to the housing via the circular metal core printed circuit board; the current driver circuit arranged on a substrate having an upper portion of a first width tapering to a lower portion of a second width, the first width being greater than the second width, the upper portion including two side walls configured to come into contact with the inner surface of the second, lower cavity of the base, the upper portion further including a tab, with output terminals, dimensioned to fit into an aperture of the annular center wall to facilitate an electrical connection between the output terminals and the at least one LED, the lower portion extending away from the housing along the longitudinal axis; and a base configured for receiving input power and coupling the input power to the current driver circuit, the base being dimensioned to be disposed over the lower portion of the current driver circuit substrate with an interference fit.