Volpe and Koenig, P.C.
Projection-type video display apparatus
A projection-type video display apparatus includes: light sources, an illumination optical system, a display element, and a projection optical system. The illumination optical system includes: a mirror that reflects the illumination light toward the display element; a lens that is placed between the mirror and the display element on an optical path of the illumination light; a mirror angle adjustment mechanism that adjusts an angle of the mirror; a light-shielding plate that blocks unwanted light which is a portion of the illumination light reflected off the mirror toward the display element via the lens; and a light-shielding plate movable mechanism that is able to move the light-shielding plate between a first position to block the unwanted light and a second position to permit the unwanted light to illuminate the display element.
MAXELL, LTD.
G G G G G
G03B G03B G03B G03B G03B
inventional inventional inventional inventional inventional
Shinro Hidemi Eiki
Inui Yamada Ishijima