Patent ID: 7645043

Claim:
An optical engine for a projection system, comprising: a lamp that irradiates light; an illumination device provided with a plurality of lens through which the light is passed; a composition device that separates and composes the light to form an image signal; an engine base provided with the illumination device and the composition device on a top portion thereof; an engine case disposed between the engine base and the reinforcing part, and configured to accommodate the composition device therein; a reinforcing part, which is made of a highly rigid material and one side of which is coupled to the composition device and the other side of which is coupled to the engine case to prevent deformation of the composition device; and a projection lens that projects light composed in the composition device to a screen, wherein the composition device comprises a quad, a quad housing to which the quad is coupled, and a LCOS panel assembly coupled to the quad housing, and wherein the reinforcing part is formed in a shape corresponding to a lower surface of the quad housing.