Patent ID: 8052281

Claim:
A projection apparatus, comprising: a first light source for providing a first colored light; a second light source for providing a second colored light; a third light source for providing a third colored light; a first light guiding device for guiding the second colored light and the third colored light; a first digital micromirror device (DMD) adapted to modulate and reflect the first colored light; a second digital micromirror device (DMD) adapted to modulate and reflect the second colored light and the third colored light both of which are guided by the first light guiding device; a second light guiding device for projecting colored lights from the first DMD and the second DMD wherein the first light source, the second light source, and the third light source are a green LED, a red LED, and a blue LED for providing a green light, red light, and blue light, respectively; a projection lens set disposed at the same side of the first, second and third light sources; and a heat dissipation device comprising: three heat conductive units being in contact with the first, second and third light sources, respectively; and a plurality of heat sinks being connected with the three heat conductive units, wherein the heat conductive units and the plurality of heat sinks extend from the light sources and the projection lens towards the opposite side of the first DMD, the second DMD, the first light guiding device and the second light guiding device.