Tesla's dream of wireless power transmission on display

A Haier HDTV sits on top of a clear plastic stand, playing a movie from a Blu-ray player. Except as you walk around the display, you realize the HDTV is not connected to anything, not to the Blu-ray player and especially not to a power source.

Nikola Tesla believed he could broadcast power over the air. A company called WiTricity, founded by an MIT professor, is getting close to accomplishing it. A foot or so behind the HDTV is a black monolith. Inside the monolith, and inside the Haier HDTV, are matching coils resonating at 240 KHz . Using highly-coupled magnetic resonance, the coil in the black monolith wireless transfers power to the HDTV at about 80 percent the efficiency of wired AC.

Instead of me screwing up the technical explanation of how this works, check out the photo of the display that describes the process.

WiTricity is also doing wireless power transmission in cellphones and especially electric cars. One possible future are garages and cars with matching coils - just drive into your garage and your car's battery charges without jacking in.

Haier's HDTV display is merely a proof of concept. There's no word as to when this idea might be commercialized, but the possibilities of power connections without wires are mind-boggling.

Oh, the Blu-ray image is being broadcast to the HDTV via WHDI, the same technology that LG will use in its coming wireless-enabled HDTVs.