Does your Samsung plasma suffer from horizontal line bleed? - AVS Forum
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post #1 of 245 Old 11-11-2008, 10:14 AM - Thread Starter
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I am trying to determine if the horizontal line bleed (see attached photo) exhibited on my Samsung Plasma is normal or a defect.
LL
LL
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post #2 of 245 Old 11-11-2008, 10:51 AM
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Is it always there on all inputs?
If they are then the problem may be with your set.

Do the bars scroll up the screen slowly?
If they do they are hum bars. Somewhere in the signal chain there is a ground loop.

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post #3 of 245 Old 11-11-2008, 11:16 AM - Thread Starter
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it's there on all inputs, and as you can see in the pictures, it follows the ropes through the fighter. with the right background, it is also visible from the sets menus. If you look at a movies green rating screen, the box at the bottom will bleed to the sides.
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post #4 of 245 Old 11-11-2008, 11:23 AM
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Quote:
Originally Posted by vega509 View Post

I am trying to determine if the horizontal line bleed (see attached photo) exhibited on my Samsung Plasma is normal or a defect.

Which model do you have?

Samsung PN50A450
Samsung Blu Ray
Panasonic HT SCPT960K
Videotron - Illico HD terminal
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post #5 of 245 Old 11-11-2008, 11:28 AM - Thread Starter
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PN58a650, I've seen it on the 550 series in the store.
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post #6 of 245 Old 11-11-2008, 11:33 AM
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Quote:
Originally Posted by vega509 View Post

PN58a650, I've seen it on the 550 series in the store.

How long have you had your TV?

You may need to shield your power cord by adding those magnetic cord shields, it should have come included with your plasma. If you already have it installed on your power cord, try moving it around just a little. It may solve the problem.

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post #7 of 245 Old 11-11-2008, 11:48 AM
 
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wow, thats terrible. i would think that has to be a defect
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post #8 of 245 Old 11-11-2008, 11:49 AM - Thread Starter
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I have tried with and with out, I have also tried plugging direct into the wall bypassing my Belkin PF60. The bleed continues.
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post #9 of 245 Old 11-11-2008, 12:11 PM
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As I mentioned in anther thread, I've seen it but only when I bring up the menu and choose "source list" to select the TV source. There, you'll see the very bright selected menu item, and right beside it, if your TV is showing a light colored object like a human face, you'll see a darkened area on the face in the same vertical level as the selected menu item area. However, I've never seen anything like that in normal viewing, or even in other menu options. It's not serious enough for me to notice before vega509 mentioned it, and even then I had to take clues from the discussion here to find out which menu option to use to see it.
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post #10 of 245 Old 11-11-2008, 12:24 PM
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Quote:
Originally Posted by vega509 View Post

I have tried with and with out, I have also tried plugging direct into the wall bypassing my Belkin PF60. The bleed continues.

If this is something you've been seeing from day one, I would either return the set or call a technician to come in and look at it.

Samsung PN50A450
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post #11 of 245 Old 11-11-2008, 12:41 PM
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Quote:
Originally Posted by RYAXIN View Post

If this is something you've been seeing from day one, I would either return the set or call a technician to come in and look at it.

I believed he returned it already, or even multiple times, but every time he sees the same problem?
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post #12 of 245 Old 11-11-2008, 01:22 PM - Thread Starter
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Quote:
Originally Posted by SJKel View Post

I believed he returned it already, or even multiple times, but every time he sees the same problem?

this is the 2nd set in my home. I also see it on the 4 at BB, both the 550's and the 650's. Samsung says this should not happen, but when I see it on 6 for 6 sets, I tend to think this may be inherent in Samsung plasmas.
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post #13 of 245 Old 11-11-2008, 02:38 PM
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Funny you show those screens because I noticed it on my 32" Samsung LCD (sorry cannot remember the model) that I've had for about 3 years now.

Mine are vertical lines and only noticable while watching something like hockey (because of the lighter background). Though I do see it on program types, it is much more difficult. I really have to concentrate to see them so I wouldn't consider them a huge issue for me.
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post #14 of 245 Old 11-12-2008, 11:53 AM
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Quote:
Originally Posted by RYAXIN View Post

If this is something you've been seeing from day one, I would either return the set or call a technician to come in and look at it.



taken from the Samsung website:


Q. There Are Vertical Lines Running Through The Picture On My Plasma TV.


A. If you see white or colored vertical lines running through the picture of your Plasma TV, your TV needs to be serviced.

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post #15 of 245 Old 11-12-2008, 12:32 PM
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There are a ton of threads on this topic - it is not only common on all plasmas but in fact a quirk of the technology. I see it on my Panasonic when there's a long horizontal thing on the screen - usually menus or graphics. Now, where's a Pioneer owner to tell me it doesn't happen on those?

I've read lots of the threads and don't fully understand why it happens, but here's a little speculation. You notice in those pics that the areas to the sides of that bright white rope are darker than the rest. There must be something in the way the image is generated that causes a localized, horizontal version of what the "automatic brightness limiter" circuit does for the screen as a whole. ABL is why the whites of a full white screen (say a snowy mountain) aren't as bright as the whites on a mostly dark image (stars in the sky). Is there an ABL-like "feature" that acts on each horizontal line of pixels? Anybody?

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post #16 of 245 Old 11-12-2008, 12:44 PM
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Quote:
Originally Posted by vega509 View Post

I am trying to determine if the horizontal line bleed (see attached photo) exhibited on my Samsung Plasma is normal or a defect.

Vega are the pics of your TV?
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post #17 of 245 Old 11-12-2008, 01:25 PM
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I believe what greenjp says is correct. But rather than an ABL-like feature, I believe it is because a voltage is applied across each row of pixels. Where the white line is, there is a relatively large voltage drop. This means that there is a relatively smaller voltage drop over the darker pixels. Thus they appear even darker than they would normally be.
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post #18 of 245 Old 11-12-2008, 03:56 PM
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Quote:
Originally Posted by regnad_kcin View Post

I believe what greenjp says is correct. But rather than an ABL-like feature, I believe it is because a voltage is applied across each row of pixels. Where the white line is, there is a relatively large voltage drop. This means that there is a relatively smaller voltage drop over the darker pixels. Thus they appear even darker than they would normally be.

Plasma works off of a matrix that supplies voltage to the anode/cathode in each cell. I am not sure about the constuction details, but what you are saying sounds right.

The Kuros do have this issue as well, but to a lesser extent, better electronics helps and this is what you buy a high end Kuro for.

Despite all of the flaws that an LCD has, I would take those anyday over what I see in those pics.
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post #19 of 245 Old 11-12-2008, 04:31 PM
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Quote:
Originally Posted by TNG View Post

Plasma works off of a matrix that supplies voltage to the anode/cathode in each cell. I am not sure about the constuction details, but what you are saying sounds right.

The Kuros do have this issue as well, but to a lesser extent, better electronics helps and this is what you buy a high end Kuro for.

Despite all of the flaws that an LCD has, I would take those anyday over what I see in those pics.

Fortunately, what you see in those pics are not typical of an average plasma.
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post #20 of 245 Old 11-12-2008, 11:23 PM
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^^^ True but the kuro defense forces seem to turn everything into some kuro worship thing
I guess the "better electronics" still can't defeat buzzing and blotching
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post #21 of 245 Old 11-13-2008, 05:27 AM
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I see this effect all the time on my XBR960 - especially during movie credits.

I read in a thread here months ago about how this effect still happens on plasmas. As mentioned before, I believe it's just a common effect of televisions in general - not necessarily linked to your specific set or even Samsung.
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post #22 of 245 Old 11-13-2008, 06:22 AM
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Both of the Panasonics that I have owned display this effect. Always thought that it was a minor drawback to plasmas in general but it's possible it could just be a defect in my monitors. I rarely notice it unless I'm looking for it.
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post #23 of 245 Old 11-13-2008, 06:27 AM
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Quote:
Originally Posted by discopaul View Post

^^^ True but the kuro defense forces seem to turn everything into some kuro worship thing
I guess the "better electronics" still can't defeat buzzing and blotching

Don't get me wrong, I am not a plasma fan by a long shot. The more I hang around this side of the forum the more I see of the built in flaws in plasmas. This is just one more item to add to some that buzz, blotches, green trails (the human eye is more sensitive to green), and as burn in is now called, Image Retention.

Again there are allot of people here who would dump their Kuro in a hot minute if something better came along. I know I would dump my LCD if something better came along.

Doing some reading last night on plasma tech. There are ways to avoid this type of line bleed or ghosting, but they would make a set way to expensive I would imagine.
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post #24 of 245 Old 12-28-2008, 11:01 PM
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hi, just wondering if you resolved your problem??
reason being i just purchased a samsung ps50a650 and am noticing the same problem.

(have noticed it on the older samsung ps50q91 models .... am beginning to think its a samsung thing)
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post #25 of 245 Old 12-28-2008, 11:20 PM
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Well, I'm watching a somewhat crappy hd boxing feed from hbo and I don't see it. If it's there, it must be very subtle. I'm about 6 feet from my 2 year old Sammy 4273.
I wonder if this is a settings issue?
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post #26 of 245 Old 12-29-2008, 05:11 AM
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This is an "all plasmas issue" whoever said it doesn't affect Kuros doesn't have enough on hands experience. You can see it just by opening the user settings menu Also seen it on Panasonics and according to this thread Samsung too.

Here is some good info http://www.avsforum.com/avs-vb/showt...ght=line+bleed

Be a fan of displays, not companies or technologies!
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post #27 of 245 Old 01-10-2009, 02:19 PM
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I have the same horizontal bleeding problem on the Samsung PN58A550 I just picked up. Before I ran across this thread, I called their tech support and was directed to download & install a new firmware. It of course did nothing to fix the problem, but it's not too noticeable outside of menu screens, video games, etc. I'm going to look at the comparable Panasonic 58" to see if it's any less of an issue for that model, but I'm not holding out much hope.
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post #28 of 245 Old 01-10-2009, 02:23 PM
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Quote:
Originally Posted by RYAXIN View Post

How long have you had your TV?

You may need to shield your power cord by adding those magnetic cord shields, it should have come included with your plasma. If you already have it installed on your power cord, try moving it around just a little. It may solve the problem.

About the ferrite cores please see post #1213 in A650 owners thread.
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post #29 of 245 Old 01-10-2009, 02:40 PM
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I have a PN50A400 and can not see what you are seeing. For about 35 min now i have tried to make my self see it. I have some great "reference" material from a NFL networks game it almost looks 3D. Even when the field is vertical in a slow-mo replay i still can not see the line fade you all speak of.

Does anyone think this might be a 720 vs 1080 thing that is happening here.
I have heard that a 720 lets more light through the panels do in part to larger pixels. For the record this Sammy was my first plasma i came from a 47PFL7422D Phillips. Only thing i do not like is the glare during the daytime but the wifey is going to work on that with some new darker blinds as we speak so should not be a problem in the summer. Besides that this is FAR better in PQ brightness,looks, and overall better performance. I see what black is now and i can set at either couch and the PQ does not drop like a crack ho for a 50 rock When i bought the Phillips it was over 2000 in 06 i got the Sammy for 749.99 2 days before black Friday worth EVERY penny(except during the day right now).

Can't fix stupid
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post #30 of 245 Old 01-12-2009, 10:50 AM
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I only notice it while viewing SD content, or when bringing up the menu during HD content.

The musicians I listen to are so underground they haven't even heard of themselves.
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