Samsung hasn't exactly been as big on glasses-free
3D TVs as some other manufacturers in recent years, but it's now showing one off at the FPD China trade show -- or a prototype of one, anyway. According to Tech-On!
, the 55-inch display is able to accommodate nine different viewpoints for glasses-free 3D viewing, and it can be switched into a 2D mode at any time, which works by changing the optical refraction index of an LCD panel that sits on top of the main LCD that's actually used to display images. Right now, the prototype is also relying on a direct-lit CCFL backlight, although Samsung notes that would likely be replaced with an LED backlight before it actually hits the market -- something that's still a good three years away.