Patent ID: 7304690

Claim:
An optical engine of a projection television for enlarging an image produced in an image producer and projecting the enlarged image on a screen, the optical engine comprising: a light generator; a mirror device for reflecting illumination emitted from the light generator thereby changing a path of the illumination, the mirror device in which a reflection angle of the illumination can be adjusted; a projection apparatus for enlarging and projecting the image produced in the image producer on the screen by reflecting the image to an incident illumination from the mirror device, wherein the path of the illumination is aligned to correspond for the whole image produced in the image producer to be projected on the screen by adjusting the mirror device; and wherein the mirror device further comprises: a case having a shape of a box fastened to the projection apparatus; screw portions formed at three corners of a quadrangle defining an upper portion of the case; a mirror unit with a mirror fastened therein for reflecting the illumination emitted from the light generator, the mirror unit comprising holes corresponding to the screw portions; three compression springs disposed between the screw portions of the case and the holes of the mirroring unit respectively; and three screws assembled in the screw portions of the case through the holes and the compression springs of the mirroring unit, wherein a reflection angle of the mirror is adjusted by turning the three screws.