Patent ID: 9547221
Date: 2017-01-17
CPC Classifications: G03B

Claim:
1. A video projection device comprising: an optical engine that projects video light; a reflective optical element that reflects said video light projected by said optical engine with a reflective surface formed in a rotationally symmetrical shape centering on an optical axis; a reflective screen on which said video light reflected by said reflective optical element is projected; a shielding housing that houses said optical engine, said reflective optical element, and an electric circuit portion that electrically drives said optical engine; and a strut member that connects a rear surface portion of said shielding housing, and a rear surface portion of said reflective screen in a state where the rear surface portion of said shielding housing and the rear surface portion of said reflective screen are positioned, wherein the strut member has such a size as to be capable of supporting and connecting to only a central part of the rear surface portion of said reflective screen, and wherein the reflective screen is connected to the rear surface portion of said shielding housing through the strut member, and wherein in the rear surface portion of the reflective screen, a first plurality of screen reinforcing frames are fixed to the central part thereof with bonding members, and a second screen reinforcing frame is fixed between the first plurality of screen reinforcing frames with the bonding member.