With their high end F96, A786 and A956 series, Samsung showcased the talents of LED technology. With the 6000, 7000 and 8000 series, Samsung are aiming to make LED based LCD TV's mainstream.
LCD TV's have traditionally required an 'always on' backlight to illuminate the display, a system which makes it difficult to achieve high contrast ratios. LED technology is designed primarily to achieve higher contrast but comes with the added benefit of much wider colour palette, lower power consumption and a far less bulky profile with the backlight removed.
Rather than the 'local dimming' LED technology of their earlier models, and as a concession to affordability, the 7000 series uses 'edge based' LEDs. While 'local dimming' employs 'banks' of LED's which can be dimmed individually the 7000 series uses white LEDs which are mounted along the edges of the screen to illuminate an array of reflective plates which direct the light forward and out of the screen.
Illustrating the effectiveness of LED technology, the UE-40B7000 delivers a startlingly good black level performance. More surprisingly, the performance seems to confirm Samsung's claims that their 'edge based' approach is as good if not better than the 'local dimming' variant LED TV's. In fact, the 40B7000 produces black levels which rival the very best flat panels, LCD or Plasma, currently available. The only minor hicups, which prevents the TV from achieving greatness in respect of black level performance was the presence of a small amount of clouding - hardly noticeable, but there all the same.
Samsung UE-40B7000 (40B7020) 
Read a full review of the Samsung UE-40B7000.
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