| 摘要 |
PURPOSE: A method and a device for 24 hours advertisement/broadcasting/information service using multiple rear projection screens are provided to install multiple rear projection screens and to select a rear projection screen according to indoor/outdoor illuminance. CONSTITUTION: A device for 24 hours advertisement/broadcasting/information service using multiple rear projection screens comprises a first rear projection screen(3), several image machinery(6), a projector(4), a connection switching device(7), a second rear projection screen(5) and a server device(9). The first rear projection screen(3) is installed at a window of a building. The several image machinery(6) includes TV, VCR, camcoder, DVD together with terminal device(8). The projector(4) can be connected to the image machinery(6). The connection switching device(7) can switch a projector output image by connecting the projector(4) with the several image machinery(6) simultaneously. The second rear projection screen(5) is installed at optional distance between the first rear projection screen(3) and the projector(4) according to installation location and projection angle of the projector(4). The server device(9) is connected to internet through the terminal device(8).
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