Apple patents glasses-free, multi-viewer 3D

Apple has been granted a patent for a projection system that can enable multiple viewers to simultaneously view 3D images without the need for those dorky 3D glasses. The patent, succinctly entitled "Three-dimensional display system," is fiendishly complex, but its goal is simple: to provide "highly effective, practical, efficient, uncomplicated, and inexpensive autostereoscopic 3D displays that allow the observer complete and unencumbered freedom of movement." Autostereoscopic is the standard term for the ability to present 3D content without the need for eyewear such as active shuttered or passive polarized glasses, as are used for most current 3D presentations. As the patent states, "...most voyages into virtual reality are currently solitary and encumbered ones: users often wear helmets, special glasses, or other devices that present the 3D world only to each of them individually." Understandably, this is less than ideal - "observers generally do not like to wear equipment over their eyes," the patent notes.

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