What you see above is an LCD panel that refreshes at 240Hz, and delivering 3D at 60 frames per second to each eye, by using the typical active shutter glasses technique of blocking light to your left eye when the "right" image is displayed, and vice versa for the right eye.
Check out the link for some insight to the wizardry that makes the XEL-1 work, including ramping down panel brightness after turn-on and insertion of "blanking" frames.