On March 26, 2009 Samsung announced that it has begun production of its ultra-slim, energy-efficient LCD TV panels that make use of edge-lit LED backlighting technology. There are three sizes: 40″, 46″, and 55″. Edge-lit LED backlighting has an advantage over LED backlighting from the back: lighter weight and thinner designs. Compared to a CCFL backlit LCD TV the LED backlight is greener: no mercury and consumes 40% less power. As you can see from the picture above, the LCD TV panels are just 10.8mm thick. That’s just 0.425″! A typical LED backlight shines light from the back toward the front. Compared to that an edge-lit LED backlight emits light from a row of LEDs on the top and bottom. This is slightly different from what you see with LCD panels geared for notebook PCs: they typically have just one row of LEDs on the bottom. A light-guide plate is used with the edge-lit LED backlights that reflect the light toward the front.
Samsung has resolved some technical issues surrounding edge-lit LED backlighting for large LCD TV applications: inadequate brightness across the entire screen and overheating of the outside frames and the light-guide plate.