Flow controlled effective LED based lighting system

摘要

A lighting system has a heat sink for removing the heat released by LED chips by means of natural convection and thermal radiation. A center opening formed between air and heat sink fins enables the transfer of heat generated by LEDs, electronic driver circuit and phosphor on said heat sink fins to the flowing air inside and removing from the system, and increases the contact surface of heat sink fins with the air that enables to transfer the heat effectively from heat sink fins to flowing air and also with effective radiative heat transfer. The heat sink has a chimney inlet where air enters into said center opening, on which the PCB and said LED package are positioned, and which interconnects LED package and heat sink, which has an optimized structure and base angle, that maximize the heat removal by natural convection and thermal radiation.

主权项

1. A lighting system comprising:
an LED package having LEDs that generate light; a diffuser cooperative with said LED package so as to diffuse the light generated by said LED package and so as to protect said LEDs; a connection socket adapted to transmit electricity; an electronic driver circuit electrically connected to said connection socket and to said LEDs so as to convert electricity from said connection socket to an electrical output that operates said LEDs and to limit current to said LEDs; a phosphor cooperative with said LED package that regulates light emitted from said LEDs; a heat sink comprising:
a plurality of heat sink fins cooperative with said LED package and said electronic driver circuit and said phosphor so as to remove heat therefrom by natural convection and by thermal radiation;a center opening passing through said plurality of heat sink fins from a heat sink base to a circuit board housing, said center opening adapted to contact the heat generated by said LED package and said electronic driver circuit and said phosphor; anda chimney inlet cooperative with said center opening so as to allow air to enter said center opening; a mounting plate having a first end positioned adjacent to said chimney inlet and a second end positioned adjacent to a location where said plurality of heat sink fins and said diffuser intersect; and a printed circuit board (PCB) mounted on said mounting plate, the PCB having said LED package placed thereon and positioned adjacent to the chimney inlet so as to interconnect said LED package and said heat sink.