Current LCD / LED TV that will be released in two types: 1. LED Backlight >>>> LED Backlight CCFL tube behind the screen will be replaced with LED bulbs are either replace all such SONY X Series 46 ". above, which uses an RGB LED bulb LED tube is used three colors (red, green, blue) to obtain realistic colors. And black, dark black. You can turn on / off each tube and mixed with it, such as LCD, LED and CCFL tube of SAMSUNG F Series (LA-52F91) 2. LED Edge-Lit LED lighting >>>> is placed around the edges of the screen. and shine from all 4 sides of the screen (LED TV SAMSUNG uses the new version of this) to get Contrast higher than the CCFL lamps and energy saving lamps commuting to both the design side. Make sure screens are thin