Conventional LCDs use a high-intensity blue LED backlight whose glow is converted by a phosphor coating to create a broadband, white light used to make the moving TV images. The new Triluminos tele*visions instead pair an uncoated blue LED with a thin glass tube filled with quantum dots. Two kinds of quantum dots in the tube absorb some of the blue light from the backlight and re-emit it as pure red and green light.
I talked with a Sony rep about Triluminos at CES, and he didn't say anything about this. He said it was white LEDs whose light was split into RGB by tiny prisms in the diffusion layer. But then again, he was just a product babysitter in Sony's booth, so I wouldn't be all that surprised if he had it wrong. I will definitely look into this. Interestingly, another company at CES, Hisense, was demonstrating something it calls U-LED, which was described to me (in very poor English by a Chinese engineer) as blue LEDs exciting red and green phosphors, which is similar to the description presented here. I intend to find out more about that as well. I did a podcast about quantum-dot technology with Jason Hartlove, CEO of Nanosys, which can be found here: twit.tv/show/home-theater-geeks/99