Patent ID: 8092026

Claim:
An optical engine comprising: a receiving chamber comprising a first sidewall, an opposite second sidewall, an end wall connecting the first and second sidewalls, and a top wall connecting the end wall, and the first and second sidewalls; three receiving holes being defined in the second sidewall and the end wall; three light source modules, each light source module comprising a positioning board, a heat dissipating plate, and a light source unit, the heat dissipating plate being sandwiched between the light source unit and the positioning board and adhered to the corresponding light source unit, each light source unit being installed in a corresponding receiving hole of the receiving chamber, the positioning board being matched with the light source unit and installed on the receiving chamber, each light source unit comprising a light source and a driving circuit board comprising a first surface and an opposite second surface, the light source being electrically connected to the first surface of the driving circuit board, the heat dissipating plate being adhered to the second surface of the driving circuit board, the positioning board in each light source module comprising a main body, the main body of each positioning board defining two first latching holes arranged on the diagonal of the main body, the driving circuit board of each light source unit defining two second latching holes corresponding to the first latching holes, two positioning posts being disposed on the second sidewall of the receiving chamber and adjacent to each receiving hole of the receiving chamber corresponding to the first and second latching holes, the main body being matched with the receiving chamber via the two positioning posts matched with the first and second latching holes.