Patent ID: 8262230

Claim:
A projection system, comprising: a prism module, comprising a first light input surface, a second light input surface, a first light output surface and a second light output surface, and the prism module further defining a first reflection mechanism and a second reflection mechanism; a first light source module, providing a first light beam; a second light source module, providing a second light beam; a digital micromirror device (DMD), being disposed adjacent to the first light output surface and comprising a plurality of micro minors that face the first light output surface, the micro mirrors being adapted to tilt from a first angle to a second angle; and a projection lens, being disposed adjacent to the second light output surface; wherein: the first light beam is emitted from the first light input surface to transmit the prism module and after being reflected by the first reflection mechanism, the first light beam is emitted through the first light output surface to the micro mirrors of the DMD; when the micro minors are at the first angle, the first light beam is reflected into the prism module through the micro mirrors and emitted from the second light output surface into the projection lens; the second light beam is emitted from the second light input surface to transmit the prism module and after being reflected by the second reflection mechanism, the second light beam is emitted through the first light output surface to the micro mirrors of the DMD; when the micro mirrors are at the second angle, the second light beam is reflected into the prism module through the micro minors and emitted from the second light output surface into the projection lens; and wherein the first light source module and the second light source module are stacked with each other, and the first light beam and the second light beam enter the first light input surface and the second light input surface respectively after being reflected from at least one reflecting mirror.