| 摘要 |
PURPOSE: A light emitting diode device is provided to accurately and simply install a secondary optical system by assembling the secondary optical system on the circuit board with an assembling bump and an assembling hole. CONSTITUTION: A light source(10) is electrically connected to a circuit board(30). A first optical system(40) protects the light source and controls an initial radiation angle of the light source. A heat sink structure(50) emits heat generated from the light source. A secondary optical system(70) is arranged on the first optical system and is combined to the circuit board. The circuit board includes one or more assembling bumps(35). The second optical system includes one or more assembling holes on the bottom side.
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