Precision Dimming explained and compared
The precision dimming technology is something you’ll find in more and more newly released LED backlight LCD televisions.
First of all LED TV screens don’t consist of LEDs, they are still too big, so correctly you’d have to call them LED backlit LCD TVs. Most of those displays are edge-lit, meaning that the LED backlights used to regulate the brightness of the screen are located at the outer edges of the screen.
While this technology delivers better results than the old fashioned CCFL backlight technology of pure LCD televisions, it has the same little weakness: Black is not not really black, more a very dark grey, white isn’t 100% bright, at least when compared to plasma TVs.
That’s where local dimming comes into game. The different local dimming areas across the screen ensure a more precise dimming, that’s why it’s called precision dimming. It means the colors look more natural and cover a broader range of the natural spectrum which results in improved picture quality. From what I have seen, it pretty much matches the quality of plasma screens.
The expression precision dimming if mostly used by Samsung, other manufacturers often call it local dimming. Different terms, same technology, don’t let yourself fool by this, it’s simply the same.