Patent ID: 7347589
Filing Date: 2008-03-25
Classification: F21K,F21V,F21W,F21Y,G02B,H01L,Y10S

Abstract:
1. A LED traffic lamp, comprising: a parabolic light reflector; a heat sink disposed near the focus of, and within, the parabolic light reflector; and at least one LED mounted on the heat sink, each LED comprising a divergence angle in a range between 3° and 60°, wherein at least a portion of the light emitted by each LED is directly transmitted through a transparent window of the traffic lamp, any remaining portion of the light emitted by each LED being transmitted through the transparent window after being reflected by the parabolic reflector to obtain a desired focus, each LED comprising: at least one LED chip mounted on a base of high heat conductivity, the base having a top surface and a bottom surface; and a transparent medium layer disposed on each LED chip; wherein each LED chip is electrically connected to a power supply through a circuit board provided on or around the base; and wherein the top surface of the base is a light reflecting surface or a light reflective surface is provided around the base.