Haier, a China-based home electronics company, prototyped a large-screen TV that does not have a power plug and is provided with electricity by using a wireless power transfer technology.
At the 2010 International CES, the company had a demonstration where the TV displayed images transmitted by using the WHDI (Wireless Home Digital Interface), a high-speed communication standard for wirelessly transmitting high-definition images. The TV does not have any wire. The commercialization schedule of the TV has not been determined yet.
Haier employed a wireless power transfer technology developed by WiTricity Corp, a US-based venture firm that a professor at the Massachusetts Institute of Technology (MIT) founded in April 2007. The technology utilizes magnetic coupling.
The prototyped TV has a coil that is approximately 1 x 1 foot (30.48 x 30.48cm) in size on its back, and 100W electricity can be supplied from a distance of about 1m.
The power feeding distance depends on the size of the coil. It is about three to five times as long as the diameter of the coil. In the demonstration, Haier transmitted electricity by using a feeder system located 20 to 30cm away from the back of the TV.
The WHDI is a wireless communication standard that uses a frequency band of 5GHz. The industry organization “WHDI” formulated it based on a technology developed by Amimon Ltd.
By utilizing a bandwidth of 40MHz, it is possible to ensure a transmission rate of 3Gbps, enabling to wirelessly transmit uncompressed 1080p 60Hz high-definition video. The maximum transmission range is 100 feet (about 30m), and data can be transmitted through a wall.
WHDI announced the “WHDI 1.0” as an official standard in December 2009, and it seems that the new TV is supporting it.