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Wireless 52in Sharp TV kills video cable

Preview: Is this the world's greatest TV?

Sharp is to demonstrate a 2cm think wall-mounted 52in TV that uses a high-speed wireless link to obtain its video signal at the IFA show in Berlin next week.

The high-definition screen has a high contrast ratio of 100,000:1. This provides a clear, vivid image even in bright rooms, and colour reproduction that's 50 percent greater than that provided by an NTSC signal, so that colours from digital sources appear deeper and more life-like.

The set has a 4-millisecond response time, which means it can display fast-moving images smoothly, and an estimated power consumption of 140kWh (kilowatt hours) per year, about half that of Sharp's current LCD TVs.

The prototype shown in Japan today weighs about 25kg. The display driver circuitry is built into the display case, although there is no built-in tuner. A high-definition signal was delivered to the set via a prototype "millimeter-wave" transmission system.

The link uses frequencies similar to those used in satellite broadcasting to transmit a high-bandwidth signal of several tens of megabits per second over a distance of about 30cm. Because millimetre waves require line-of-sight, the signal was cut off when a hand or other object was brought between the transmitter and television.

Sharp doesn't have a schedule for commercialising the display. Some of the technologies could start appearing in Sharp TV sets in the near future, although others are earlier in development and won't appear for a few years.


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