Patent ID: 7914156

Claim:
An optical engine for a projection display device, comprising: a housing including a base wall, and a surrounding wall that extends from a side of said base wall and that cooperates with said base wall for defining a receiving space with an opening; a light source module disposed at a side of said housing for providing an illuminating light beam into said receiving space; an imaging unit including a display element and an optical lens set disposed in said receiving space, said optical lens set being operably associated with said light source module and said display element; and a projecting mechanism including a lens barrel having a first barrel end and a second barrel end, a projecting lens disposed at said second barrel end of said lens barrel, and a coupling element formed integrally with said lens barrel and disposed at said first barrel end of said lens barrel, said coupling element being configured to have a size and shape corresponding to those of said opening, and being disposed for covering said opening and sealing said receiving space.