Sometimes I think manufacturers throw out these buzz words to induce us into buying the next best thing. That's not to say LED Back light technology is bad, but let's tell it how it is.
The manufacturers have replaced the "old" fluorescent light technology for LCD TV's with the new LED back lights. There are 2 forms of this:
Dynamic RGB LED's which are positioned behind the panel.
Edge LED's which are positioned around the rim of the display and the light is evenly diffused across the back with a special panel. This allows the display to become very thin.
Another bonus with this technology is the small amount of power it uses.
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