| 摘要 |
A rear projection apparatus includes an optical engine, a screen, a projection lens disposed between the screen and the optical engine and a condensing element disposed on the screen and between the screen and the projection lens. The center of condensing element is substantially offset from the center of the screen. The optical engine includes a light source suitable for providing a light beam and a display device suitable for transforming the light beam into an image light beam. The projection lens is disposed on the transmission path of the image light beam and the position of the projection lens is offset from the center of the display device. The optical axis of the projection lens on the screen is offset from the optical axis of the condensing element. The display device has a common plane with a normal vector not parallel to the optical axis of the projection lens.
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