Lighting device with reverse tapered heatsink

摘要

A solid state lighting devices includes a heatsink having a first end arranged proximate to a base end, and a second end arranged between the first end and a solid state emitter, wherein at least a portion of the heatsink is wider at point intermediate the first end and the second end than the width of the heatsink at the second end. Such reverse angled heatsink reduces obstruction of light. A heatsink may include multiple fins and a heatpipe.

主权项

1. A solid state lighting device comprising:
a base end; at least one solid state emitter; and a heatsink disposed between the base end and the at least one solid state emitter, and arranged to dissipate heat generated by the at least one solid state emitter; wherein: the heatsink includes a first end proximate to the base end, the first end having a first width; the heatsink includes a second end disposed between the base end and the at least one solid state emitter, the second end having a second width; wherein the lighting device includes one of the following features (i) and (ii): (i) the first width is greater than the second width, and width of the heatsink increases continuously with increasing distance in a direction from the second end toward the first end, and the heatsink is exposed to an ambient air environment, or (ii) the heatsink includes a width that increases, then decreases, and then increases again with increasing distance in a direction from the second end toward the first end to yield sequentially arranged first and second reverse tapered portions.