Countless standards exist for sending data over the air, but even devices that are designed to be 100 percent wireless end up needing to be plugged in eventually. Sure some gadgets like the Palm Pre allow for wireless charging via electromagnetic induction, but somehow the milliamps required to accomplish this just isn’t as impressive as Sony’s latest demonstration which showed a 22-inch LCD being powered wirelessly using a source that was almost 20 inches away.
Currently they are calling the technology “magnetic resonance”, and it works by transferring energy between two coils using a magnetic field. By tuning the coils to the same resonant frequency, energy can be moved safely, even when the two coils are not aligned. It also allows them to keep metal objects that get in the way from heating up.
Early tests show both the promise, and the limitations of this new technology. Currently the power transfer is only 80 percent efficient, and with a range of only 20 inches, they clearly still have some work to do before this goes mainstream. The announcement which was made on Friday was only to demonstrate their progress, and it will likely still be several years before anything like this starts appearing in commercial products.
Okay, so this isn’t a testla coil , but are you comfortable with the idea of electricity being wireless?