US Patent 8459836 Illumination device having changeable illumination area

An illumination device includes a first lighting element, a second lighting element and a pivoting shaft. The first lighting element includes a first lighting module and a first power module contacted with one side of the first lighting module for providing power to the first lighting module. The second lighting element includes a second lighting module and a second power module contacted with one side of the second lighting module for providing power to the second lighting module. The pivoting shaft includes a first stick and a second stick detachable engaging with the first stick. The first stick is rotatably connected to the first power module. The second stick is rotatably connected to the second power module.