| 摘要 |
A projection display system includes (1) a transparent screen, (2) a polarizer on the transparent screen, (3) a retarder plate on a first side of the transparent screen, (4) a mirror on the first side of the transparent screen, and (5) a projector for projecting an image through the transparent screen, the polarizer, the retarder plate, and onto the mirror. The mirror reflects the image onto the polarizer so that the reflected image is visible from the first side of the transparent screen and invisible from the second side of the transparent screen.
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