Patent ID: 7101051

Claim:
A projector for projecting an image to a projection plate, comprising: a first digital micro-mirror device, with a first micro-mirror disposed thereon; a second digital micro-mirror device, comprising a plurality of second micro-mirrors disposed thereon; and a projection light source, emitting a projection beam toward the first digital micro-mirror device; wherein the first digital micro-mirror device reflects the projection beam from the projection light source to the second digital micro-mirror device, the first micro-mirror is rotatable with respect to a vertical axis to adjust a horizontal position where the projection beam is projected on the second digital micro-mirror device, the second digital micro-mirror device reflects the projection beam from the first digital micro-mirror device to the projection plate, and the second micro-mirrors are rotatable with respect to a horizontal axis to adjust a vertical position where the projection beam is projected on the projection plate, wherein the projection light source comprises a first color light source, a second color light source, a third color light source and a prism assembly, the first color light source emits a first color beam, the second color light source emits a second color beam, the third color light source emits a third color beam, and the prism assembly combines the first, second, and third color beam into the projection beam, wherein the first color light source, the second color light source, and the third color light source are disposed on the second digital micro-mirror device.