Well, the most notable difference between LED and LCD TV's is the price. LCD televisions are substantially cheaper than LED. Another difference has to do with viewing quality; the blacks are truly black (not dark gray) and the colors are more realistic in an LED television. LED tvs can achieve a contrast ratio of up to 500,000:1 and also in general have a higher refresh rate which will help when watching shows with motion such as sports programming or movies. Another distinguishing feature is that LED televisions are about one-third the thickness of an LCD television and about one-half the weight. Probably the most significant difference between an LED and an LCD television is how they affect the environment. LCD televisions use mercury in the manufacturing process while the LED tv does not. Mercury is definitely a danger to the environment, so proper disposal of an LCD television is a necissity. And finally, an LED tv will use about 40% less energy than an LCD set.
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Actually, LED TVs, mentioned in countless ads, are not real LED TVs. They're just equipped with a light-emitting diode backlight of the whole matrix, not every pixel, as a real LED display should have. You can find LED display on a concert stage or some competition, they're really huge. But when we are speaking about home multimedia device, we mean OLED display (organic light emitting diode) - just screen backlight.
Here's a brief review about SANYO LED TV: http://hubpages.com/hub/Sanyo-LED-TV-Pe … -Christmas
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