| 摘要 |
A relatively thin projection screen includes a sheet of parallel, specially treated fiber optic cables that emit light transversely, and an overlying liquid crystal display screen formed of a plurality of adjacent and individually modulatable liquid crystal shutters. A dot matrix of pixels is generated by controlling the sequential transmission of light to the optical fibers, and the transparency or opacity of the overlying shutters. As each row of the optical fibers is sequentially energized by a light source, the columns of liquid crystal shutters are simultaneously opened or closed in accordance with signals derived from a television video signal. This provides an optical reproduction of the television signal from the pixels of light defined at the cross over points of the rows and columns. The liquid crystal shutters are modulated to allow a varying amount of light to pass through so that different levels of brightness may be obtained. In one embodiment, a scanning laser sequentially energizes and illuminates the fiber optic cables. In another embodiment, a light source illuminates a shutter that, in turn, controls the sequential illumination of the fiber optic cables. A control apparatus ensures that operation of the liquid crystal shutters is synchronized with the sequential illumination of the fiber optic cables to recreate the video image from the input signal.
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