Typical attempts at a glasses-free 3D display have trouble with viewing angles; we're all too familiar with having to sit in a sweet spot to get the effect. HP Labs might have just solved this last problem with a prototype 3D LCD that would better accommodate the real world. The display's backlight has nanopatterned grooves that send blue, green and red in multiple directions, letting the LCD show only the light that would be seen from a given viewpoint. Those positions are set in stone, but they're both abundant (200
