Patent ID: 7708412

Claim:
A micro-mirror projection system, comprising: an optical engine unit including: optical parts configured to convert incident light into an image signal, a primary lens configured to transmit the image signal, and an engine cover configured to cover the optical parts and the primary lens; a DMD (digital micro mirror device) configured to reflect the image signal transmitted from the primary lens; a prism formed closely to the DMD and configured to adjust a path of light; a projection lens configured to project an on-beam of light from the prism toward a screen; and a light-blocking part provided on an incident side of the projection lens and configured to shield at least light of a flat state region located between the on-beam and an off-beam reflected from the DMD, such that only the on-beam passes through the projection lens, wherein the light-blocking part is formed by bending a part of the engine cover such that the light-blocking part is interposed between the prism and the projection lens.