Patent ID: 7923831

Claim:
A light source comprising: a first die comprising an LED, the first die having a bottom surface and first electrical contact for applying power to the first die; a first lead comprising a heat conducting layer of substantially constant thickness having a narrow width die mounting region on which the first die is mounted and connected electrically and thermally and a wide width heat transfer region that is adapted for connection to a heat sink, the narrow width die mounting region and the wide width heat transfer region being separated from one another, the first lead having a cross-sectional width that increases as a function of a distance from the narrow width die mounting region on a path connecting the narrow width die mounting and the wide width heat transfer regions of the first lead; a second die comprising an LED, the second die having a bottom surface, the second die having a first electrical contact for applying power to the second die; a second lead comprising a heat conducting layer of substantially constant thickness having a narrow width die mounting region on which the second die is mounted and connected electrically and thermally and a wide width heat transfer region that is adapted for connection to a heat sink, the narrow width die mounting and wide width heat transfer regions being separated from one another, the second lead having a cross-sectional width that increases as a function of a distance from the narrow width die mounting region on a path connecting the narrow width die mounting and the wide width heat transfer regions of the second lead; a third die comprising an LED, the third die having a bottom surface, the third die having a first electrical contact for applying power to the third die; a common lead separate from the first and second leads, the first, second, and third dies each comprising a second electrical contact for applying power to that die, the second electrical contacts of the first, second, and third dies all being connected to the common lead; and a body comprising an insulating material that is bonded to a portion of the first and second leads while leaving the heat transfer regions of the first and second leads exposed.