| 摘要 |
An LED lamp includes an optical portion, a heat dissipation portion, and an electrical portion. The optical portion includes a base, an LED formed on the base, and an upper housing covering the LED. The heat dissipation portion includes a tube and a lower housing formed around the tube, which cooperatively define a chamber therebetween. A coolant is filled in the chamber. An upper end of the tube is sealed by the base, whereas a lamp connector is formed at a lower end of the tube. A circuit board attached with heat-generating electrical components is positioned inside the tube. A thermally conductive glue is injected into the tube. During operation of the LED lamp the coolant experiences a phase change to absorb heat generated by the LED and the circuit board and its electrical components.
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