Originally Posted by 8traxrule
...What this thing does with "smart dimming" is the equivalent of turning the sound completely off during any silent portions.
THIS is why the current way it works is wrong: http://www.youtube.com/watch?v=2FooNiB2coc
When there's credits on the screen, the background has a bit of grey. It HAS to, that's the nature of how the picture is! When the credits fade out, the background goes completely out, only to pop back on again when the next credit fades up. Also look what it does at the 2:36 mark as the scene pans over a black wall. It's just silly.
You may be among a small minority that finds this to be problematic. If so, smart dimming just isn't for you, just like some are irked by smooth motion. Turn it off, and it won't bug you.
"Turning the entire screen off" when there is nothing in the video seems perfectly natural to me. The reason that the higher absolute black level of CFL LCDs is annoying compared to local dimming LEDs or plasmas is exactly because they display a level of grey when there is no video. That is not something you see in nature, so it takes you out of the concept of suspending disbelief that what you are seeing is real and not just lighted pixels, while having a proper absolute black level (which local dimming simulates pretty well) is not as annoying, because it doesn't.
For instance if I see a wide shot of a full moon, local dimming might put a bit of a halo around the moon, but at least the dark area of the picture does not look artificially bright. To me, that is preferable, and probably to many others, which is why local dimming exists; to improve the viewing experience.
And anyone who ever owned an old Trinitron-tube Sony (or basically any good TV properly adjusted from the 70's to the 2000's) knows that it is natural for the screen to go completely black when black is what is being broadcast. My 7-year old niece complained that our kitchen TV kept "going on and off", but that was because she had never seen a TV that didn't keep some grey on the screen when there was a dip to black between commercials. That was some time ago; she's 36 now. And the reason why was a combination of a dark piece of glass over the tube along with great DC restoration, and these were aspects introduced by Sony that every single other TV manufacturer soon mimicked, so dipping to full black is much more ubiquitous than it is weird.
You will see that gating artifact when the screen goes completely black, and maybe they should learn to ramp that gate to make it more natural, but most of us really have no complaints. After owning this set I wouldn't think of buying one without local dimming. I think its a great feature and that Vizio's implementation if it is pretty spectacular.