LED TVs are a new technology that offers significant advantages over LCD and Plasma screens. LED TVs can be better described as LED back-lit LCD screens: they’re made of lots of Light Emitting Diodes, with a normal LCD screen in front.
The advantages over normal LCD TVs are due to the different kind of back-lighting LEDs provide. Because these diodes can be switched on and off very quickly, fast moving images are displayed without blurring. LED-backlit screens also give great, deep blacks in dark scenes.
LED screens with ‘local dimming’ are able to switch power to different areas of the screen on and off independently, giving very high contrast rates.
Edge-lit LED screens (the alternative to local dimming) are incredibly energy efficient – using around 40% less power than equivalent LCD screens.
Currently (at the end of 2009) LG makes local dimming screens and Samsung and Sharp’s screens are edge-lit.
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