By James Wells at CES
LAS VEGAS: At the 2010 Consumer Electronics Show in Las Vegas, Haier has released a television that is completely wireless – operating without a power cord.
The television uses a technology called ‘Wificity’ which was originally created at MIT, it sends power through the air to operate electrical appliances.
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How does it work? The circuit in the unit converts standard AC power to a higher frequency and using a resonant coil feeds it to a power source. The current inside the source induces an oscillating magnetic field. The device to be powered is tuned electronically to the same frequency as the source in a process called resonant magnetic coupling. The energy of the oscillating magnetic field induces an electrical current in the device.