How can this notebook's 3D polarizer glasses filter 2D images to 3D?

"This technology is nothing new. SGI have been doing it for years.
Basically the screen has polarized elements, and the refresh rate is fast enough for the left-hand-polarized elements to show data for the left eye, and the right-hand-polarised elements to show right-eye data.

When you wear the glasses, only the left or right eye sees the data designed for it, which is in subtly different locations, your brain then combines the data producing a 3D image.

You see this technology in 3D cinemas too, it's better than the old red-green method because it doesn't meddle with the colours."