Patent ID: 8891026
Filing Date: 2014-11-18
Classification: G03B,H04N

Abstract:
1. A projection video display device for enlarging and projecting a video formed by a display element with a projection lens, comprising a lens shifting mechanism arranged to move the projection lens in two axial directions perpendicular to an optical axis of projection light, wherein the lens shifting mechanism includes a first movable base for moving the projection lens in a vertical direction, a second movable base for moving the projection lens in a horizontal direction, a first actuator for driving the first movable base, and a second actuator for driving the second movable base, the first movable base is arranged to slide by using two shafts arranged in the vertical direction on a fixed member side as guide members, and the second movable base is arranged to slide by using two shafts arranged in the horizontal direction on the first movable base as guide members, and correction screws are inserted toward the two shafts as the guide members of the first movable base from a rear side of the fixed member to come into contact with the shafts, and insertion amounts of the correction screws are adjusted, thereby tilt of an optical axis of the projection lens and a position displacement of the projection lens are corrected.