| 摘要 |
A rear projection unit comprising a screen for viewing from a front side and a frame attached at the rear side of the screen. The frame has a front portion proximate the screen and a rear portion away from the screen. The rear portion includes a mounting for mounting a projector at a desired position in relation to the screen. The unit includes a light absorbing material arranged to define a main cavity within the frame bordered by the screen at one side and the light absorbing material on the other sides. The unit further comprises an extraction fan arranged to draw cooling air over a projector within the main cavity and to expel air from the cavity thereby drawing air into the main cavity through the light absorbing material, whereby the air passing over the projector is filtered through the light absorbing material.
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