US Patent 7841753 LED illumination device and light engine thereof

An LED illumination device includes an optical section at a front end thereof, an electrical section at a rear end thereof, and a heat dissipation section between the optical section and the electrical section. The optical section includes a plurality of LEDs electrically connecting with the electrical section, and a light output housing around the LEDs. The heat dissipation section includes a plurality of L-shaped heat pipes, a heat sink and a mounting seat. Each of the heat pipes includes an evaporation section and a condensation section substantially perpendicular thereto. The condensation sections of the heat pipes are received in the heat sink. The mounting seat attaches to the evaporation sections of the heat pipes. The LEDs thermally connect with evaporation sections via the mounting seat.