| 摘要 |
An LED lamp includes a housing, multiple LEDs received in a first end portion of the housing, an envelope having a first end portion inserted in the housing and having a second end portion extending beyond a second end portion of the housing, and a reflector covering the second end portion of the envelope and having a reflective surface facing the LEDs. The LEDs encircle the first end portion of the envelope. The second end portion of the envelope spaces a distance from the second end portion of the housing to define a window at the second end portion of the envelope. Light generated by the LEDs permeates the envelope and impinges on the reflective surface, and the light is reflected by the reflective surface to emit out of the housing from the window, thereby illuminating an annular region around the housing. |
