Quote:
Originally Posted by
PlasmaPZ80U 
vertical banding is common on Samsung TVs that have the S-PVA panel (which I believe yours does); however, on a good sample of your set it should not be noticeable with regular program material like movies and TV shows... please be aware an exchange may result in a set that is similar or even worse in terms of banding and other screen uniformity issues you might not even have right now
banding has nothing to do with edge-lit LED backlighting (it is rather a panel issue), but stuff like flashlighting and clouding is more common/severe on such sets... one of the reasons I believe the EH series Samsung LEDs are better than the ES series
you can check what panel type you have by looking at the white sticker on the box with the barcode... near the barcode it should read
version and then show
four characters (two letters followed by two numbers)
Txxx means a Samsung S-PVA panel (examples: TS01 and TH02)
Do you know what the USxx panels are?
Also what do you make of (from another thread):
I was wondering what everyone sees if they use Menu->Support->Self Diagnosis->Picture Test?
If you look at the orange soccer ball at the bottom right and then blue bucket to the left of that do you notice that every other 'scanline' going across the soccer ball is brighter orange than the one above and below it and that for the bucket it is every other line is a brighter shade of blue? If you don't notice that from normal distance, what about if you go close to the screen? Trying to figure out the odd vs even scanlines putting out somewhat different shades even when all are fed the same color issue that some sets have. Thanks.
Yes/No:
TV size:
Panel Type (SQ01,HS01,US02, etc.):
My results:
Yes, pretty clearly so. The object seem to have horizontal stripes running across them, every other scanline is clearly a brighter shade.
55" (ES7100)
US02
Someone else's so far:
No, not at all.
60" (ES8000)
HS01 (Sharp panel that appears to be used in all 60" sets)
and
No.
55"
TS01
(one issue that first appeared in LCD sets starting with Samsung SQ C-series panels (I'm not 100% sure but I don't sets that used the AU panels had it), became even more prevalent in D series and still remains, to a lesser degree on average, with the ES series. It also shows up in recent SONYs and some others, because they also use a lot of Samsung and some of the same other panels, I believe.
HORIZONTAL ODD/EVEN SCANLINE STRIPING:
(this sounds almost like it might be related to the vertical banding on green channel for LCD projectors issue that you listed, only in that case they seemed to have put down 1" wide columns of greens which might not have been well calibrated to each other and here it is odd vs even rows, every other horizontal line across the screen)
If you feed a solid block of color to a set since it is the same color, obviously all scanlines should show the same color. However, starting with the new panel type they came out with for some C-series sets there seems to be a major manufacturing problem they are having with them. They appear to lay down the even and the odd scanlines separately or something like that during the manufacturing process and appear to have a hard time calibrating them together since the even and odd scanlines tend to not respond the same way to the same signal, at least for certain green signals.
It seems to affect one of the green sub-pixels. On problem sets you can notice that if you look in an area of solid color every other scanline will have one of the green subpixels lit more brightly so you get a sort of dithering of sorts, but it is not in any sort of cross or offset pattern it is straight across with odd scanlines differing from even.
The difference between odd and even scanlines may not be uniform across the screen. It might be more apparent on the top half than the bottom half or top right than lower left. This I believe pretty much proves it is not done on purpose. On my ES7100 if I drag a solid box of orange around the screen it looks like a nice solid smooth color as it should on the lower left but it has horizontal strips going across it if I drag it to the top right where it looks like it was painted with every other scanline having used a different shade of orange. Elsewhere on the screen it is intermediate, still showing up but a bit less once you start getting closer to the lower left quadrant.
On C and D series it tended to show up most of all in various yellow and oranges and yellow tans but would also show in certain blue-greens etc. It was quite severe on some sets, even many or most D sets, It lent a sort of rougher or grainier or more pattered look to things. Nice smooth images would appear as if the signal was highly dithered in a very poor way (dithered scanline by scanline which really jumps out at the eye compared to checkboard pattern). Ironically, if you sent it an image that was not a solid block of color but striped with odd and even lines not quite the same color you make it appear closer to as if a solid block of color was being displayed! With the C series it seemed to be super rare on 800 or 8000 level sets and more common on 600 and 6000 series (almost like they were picking the less defective panels for the top models???). Even something like a traditional Windows folder icon, sort of a touch yellow tan, would not look smooth but would have very fine horizontal stripes running across it. The stripes would look thinner than a scanline.
If you took a macro photo of a screen showing a solid block of orange yellow you could very clearly see that every other scanline had one of the green sub-pixels putting out a different level of green!
At least from what I saw at my local Best Buy the D series suffered even worse from this and instead of maybe 40% of sets it seemed like 80% had it. With the ES series it looks like maybe 20% have it badly and another 20% have it to a lesser degree. Hard to say for sure based on so few samples. It appears to be noticeable on fewer different shades of colors with the ES series, for the most part.
The ES series mostly seem to have it to a less jarringly visible degree, although I did see one 8000 set that had it in spades and it looked so much less smooth than the ES set next to it that was all but free of it.
On the set's built-in test image under Support->Self Diagnosis-Test Picture it actually shows up very easily. Look at the blue bucket and orange ball on the bottom right. They have lots of perfectly horizontal stripes cutting across them. I would bet on a monitor without any striping issues there would not be such a look at all. There is a SMALL chance the actual image they use has those stripes across those objects but that would be a weird image, even so, that, at least, gives a good idea of what the effect looks like.
It doesn't matter what source or mode are used.
It seems they dumped out tons of defective panels during their D series release, quite a few with their C series release (I don't think any of the AU or non-Samsung panel C series sets had it only some of the ones with the samsung SQ panels, many of those had it but I also saw ones free of it too, the SQ had deeper blacks on the one plus side), and perhaps smaller numbers with their ES series release (and it doesn't tend to stand out quite as much when sets do it have, other than the one ES8000 I saw in one store that it had it in absolute spades). It seems many people are so used to crappy signals they have all just figured it is in the signal or maybe they just wrote it off as CRT-like visible scanlines or something even though it is nothing to do with that at all, of course, and not defective panels. I also have seen it on a lot on say Sony 850 TVs which I'm almost positive use Samsung Panels. Quite a few C and tons of D series sets that just looked plain out nasty with this issue. Sadly most people just thought it was the signal and not the set doing it so it only received scattered attention on the net (same thing on a monitor would've had howls of protest everywhere) otherwise it may have begun and ended with the C series SQ panels. Scanning through stores the ES look better with only a very few looking 100% out and out nasty, but I still see what seems like at least 30%-50% have it to a less objectionable but still slightly annoying degree to one level or another.
On a set that has it badly you have to sit so far back that your eyes can no longer come close to seeing a full 1920x1080 amount of detail for it to begin to blend away and average out into appearing smooth. On a set that has it to a milder degree it will mostly avg out and not be much noticeable on many shades but will still be faintly seen on some at a distance where you can just make out full 1920x1080 detail and show up more readily if you sit just a hair closer even. In on local BB they have an ES set with virtually none of it and one with tons of it side by side and that really makes it apparent, the one leaves everything natural and smooth and the other looks grainier and harsher and all stripey on solid blocks of many colors.
This does not affect the 60" sets since they appear to all use totally different panes, I believe Sharp makes all 60" panels.
I've never seen any computer monitor with this issue ever. And never saw any HDTV of any type ever have it until the arrival of the C series and the new panel type from Samsung. It seemed to peak in prevalence with the D series. It seems to occur less often with the ES than with the D series and less severely, for the most part, when it does occur than with the C or D series. And it not just a Samsung set thing either since once Sony/etc. started getting the newer type panels from Samsung their sets started showing it too now. I've seen way to few samples to really say but it seems like it might be more common on the current Sony line than the current Samsung ES line with the Sony 850 and such seeming more like the D Samsungs perhaps. But it's hard to base things off of sample sizes less than a handful.
I did notice that a C-series block diagram said they split the input image into even and odd 'scanlines' so they could parallel process things and get stuff done twice as fast, maybe when they put them back together they are not calibrating the D to A stage between even and odd scanlines well? But why do they seem to have no problem getting red and blue adjusted perfectly and only just certain signal levels of green?
It just seems to me the most basic of things that if you send something a block of a solid color that 'scanlines' adjacent should produce the same shade and not every other line a brighter shade of it! Until 2010 I never saw a single full 8bit per color screen of any type, brand, price ever, monitor or TV, do anything less no matter how cheap.
OK, then what about this test:
http://www.fredmiranda.com/forum/topic/1172272
Look at the nice sunset photo, turn your browser into a small window and center the photo so you can move the sunset sky part around the screen. Looking up close, torture test why not 2'-'3 away just ot be sure you are not missing what I am talking about, does the sky ever get super-fine single pixel high stripes of slightly different shades or pinks/oranges going across it? Does it have a totally smooth feeling or sort of a gritty look?
On my ES7100 if I move that to the bottom left quadrant the sky looks smooth as sky, if I move it to upper right quadrant I see fine horizontal lines running across the sky, every other scanline shows a slightly brighter shade of the scanline above or below it.
Upper left and lower right quadrants on the display it's intermediate, definitely there but fainter. On my PC monitor it looks smooth anywhere on screen.)
