| 摘要 |
A display video apparatus which provides a three dimensional image broadly comprises a backlighting apparatus for projecting beams of light in selected directions, a spatial light modulator for displaying images back-lit by the back-lighting apparatus, and a control system coupled to both the spatial light modulator and the backlighting apparatus. The control system causes a plurality of images of an object to be formed in succession on the spatial light modulator with each image being a view of the subject from a different angle, and each image being viewable only from particular angles. The images are formed one at a time on the spatial light modulator with a plurality of images constituting a single frame of a video picture. The backlighting apparatus preferably includes a two dimensional display device for emitting spots of light at selected locations along the two dimensional display, and a lens system for refracting light emitted by the two dimensional display device. The lens system can comprise a single lens or an array of lenses located between the two dimensional display and the spatial light modulator. The lens or lens array refracts beams emanating from a spot of light on the two dimensional display into substantially parallel rays.
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