| 摘要 |
A projection display comprises a display device, a projection optical system that has an aperture and is adapted to magnify and project an image appearing on the display device and a display panel including an image-formation device located near an image projected through the projection optical system for formation at a viewing pupil position of an aperture image of the projection optical system and a diffuser that has scatter action and is adapted to magnify the aperture image of the projection optical system into left and right viewing pupils. Misalignment warning pupils are adjacent to or overlap partly with the left and right viewing pupils via the display panel, and misalignment warning projectors for issuing a misalignment warning are located on the display panel and adjacent to at least one of the projection optical systems.
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