Abstract: A projection image display apparatus capable of maintaining the positional accuracy of an integrator optical system even when subjected to an external force is provided.

Abstract: Provided is a projection video display device with which precision of location of each component of the optical engine and the projection optical assembly is maintained and display video quality not impaired even if exterior force is sustained. A projection video display device comprises an optical engine (2) which projects light which is emitted from a light source (21) upon a liquid-crystal panel (231) and forms a video, and a projection optical assembly (3) which projects an enlargement of the video which is emitted from the optical engine (2). The projection optical assembly (3) and the optical engine (2) are configured to be anchored to a common base (4) which retains these in an integrated manner, with the common base (4) being attached to the casing of the device.

Abstract: Provided is a projection video display device with which precision of location of each component of the optical engine and the projection optical assembly is maintained and display video quality not impaired even if exterior force is sustained. A projection video display device comprises an optical engine (2) which projects light which is emitted from a light source (21) upon a liquid-crystal panel (231) and forms a video, and a projection optical assembly (3) which projects an enlargement of the video which is emitted from the optical engine (2). The projection optical assembly (3) and the optical engine (2) are configured to be anchored to a common base (4) which retains these in an integrated manner, with the common base (4) being attached to the casing of the device.

Abstract: A projection image display apparatus capable of maintaining the positional accuracy of an integrator optical system even when subjected to an external force is provided.

Abstract: Adjustment of the illumination range to a liquid crystal panel of a liquid crystal projector requires time in fixing upon adjustment and accordingly it is an object to make the adjustment effectively. In an adjustment mechanism of the illumination range of illumination means to the liquid crystal panel in an optical engine unit of the liquid projector, the spring property is provided in a lens holder for holding a lens and the lens is temporarily held by friction of the spring portion to the optical engine case after adjustment. Then, the adhesion processing is made to complete the adjustment.

Abstract: Adjustment of the illumination range to a liquid crystal panel of a liquid crystal projector requires time in fixing upon adjustment and accordingly it is an object to make the adjustment effectively. In an adjustment mechanism of the illumination range of illumination means to the liquid crystal panel in an optical engine unit of the liquid projector, the spring property is provided in a lens holder for holding a lens and the lens is temporarily held by friction of the spring portion to the optical engine case after adjustment. Then, the adhesion processing is made to complete the adjustment.