Patent ID: 8876301

Claim:
A video projection device comprising: an optical engine for emitting video light; a projection lens adapted to project said video light emitted from said optical engine; a first reflection optical device held in a first holding member and adapted to reflect said video light projected by said projection lens, in a predetermined direction, on a reflection surface having a planar shape; a second reflection optical device held in a second holding member and adapted to reflect said video light reflected by said first reflection optical device, in a predetermined direction, on a reflection surface having a rotationally-symmetrical shape centered on an optical axis; a screen adapted to display said video light reflected by said second reflection optical device; and a cabinet adapted to cover a lower surface and a back surface of said screen; wherein said projection lens and said second reflection optical device are placed at an approximate center in leftward and rightward directions of said screen and in a back portion in said cabinet, and said first reflection optical device is placed at an approximate center in leftward and rightward directions of said screen and at a front portion in said cabinet, said video projection device further comprising a coupling member adapted to integrally couple said projection lens, said first reflection optical device and said second reflection optical device to each other to form a projection unit, wherein said coupling member fixes the left and right sides of each of the first and second holding members from the perspective of said screen, wherein said first holding member fixes the left and right sides of said first reflection optical device from the perspective of said screen, and wherein said second holding member fixes the left and right sides of said second reflection optical device from the perspective of said screen.