| 摘要 |
A multiple screen, modular video display system includes a plurality of video projection units joined together in a matrix to form a large video wall display. Each unit comprises a trio of CRT projection tubes providing RGB images directed to a screen assembly including a fresnel lens which collimates and projects the combined image orthogonally from the screen and eliminates the dark border areas between adjacent projection tubes. Disposed between the adjacent units are blinder panels which block leakage of light from one unit onto the image area of adjacent units, thus eliminating spillover of image portions in the matrix display. The projection units may be grouped in modules of four units each, connected by a common frame assembly which supports the units and the associated screen assembly. The screen assembly may comprise a lamination of an inner transparent plastic panel extending across the entire module screen area, with the individual fresnel lenses joined to the inner plastic panel and a plurality of lenticular lenses secured to the outer surface of the screen assembly. Support wires may extend between medial points of the sides of the screen supports, the wires being received in grooves in the edges of the lenticular lenses to support the central portion of the screen assembly without any visible structure.
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