3D TV: Let’s Count The Ways If you missed the plethora of 3D HDTV announcements at last month’s International Consumer Electronics Show (CES) in Las Vegas, then you weren’t watching your HDTV. Like it or not, 3D is going to be a big part of presentations, from football games to digital signage with 3D advertising. There are a number of ways to implement 3D in addition to the real thing or holography. Several techniques can be implemented using flat-screen technology such as LCDs (see the figure) . Autostereoscopic 3D Autostereoscopic displays don’t require the viewer to wear any eyewear. The magic is handled at the source using a film that bends the light so each eye views it differently. One way to do this is by implementing a lenticular lens filter film and backlight system (see “3M Film For Viewing 3D Films,” Feb. 12, 2009, p. 19) . This approach works best for a single viewer, making it ideal for mobile devices. But companies such as Samsung were demon-strating large LCDs at CES where half a dozen people could view
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