Panasonic V10: Is this "banding" or something else? - AVS Forum
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post #1 of 17 Old 12-27-2009, 05:52 PM - Thread Starter
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Panasonic TC-P54V10, firmware v1.28. Panasonic DMP-BD60K Blu-ray player, HDMI to the TVs (same HDMI cable). The "green band" rating card is from the Star Trek Blu-ray (2009 J. J. Abrams version), first preview on the disc.

This image is from my 54V10. Note the severe "banding" on the edges, extending out from the white text and the rectangular box.



The next image is taken from my bedroom TV, a Samsung LN40A550 LCD, same Blu-ray player & HDMI cable. Note that there is *no* banding.



What is going on with the plasma? Is this "banding" considered normal? Is this even "banding" as generally defined here? Whatever it is it seems pretty distractingly bad to me.
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post #2 of 17 Old 12-27-2009, 08:15 PM
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It has been called horizontal line bleed and was discussed some in the v10 thread. I have it on my 65S1 also. If I remember right people have seen this on different brands and models of plasma.
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post #3 of 17 Old 12-28-2009, 04:24 AM
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this happens on my g10 as well, but I only notice it on that exact green screen you posted there. I figured it had something to do with the auto brightness limiter and didn't worry about it
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post #4 of 17 Old 12-28-2009, 04:34 AM
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Picture I took here in this thread shows banding on my 50V10. I mostly see it in SD commercials.
Yes it is annoying.

http://www.avsforum.com/avs-vb/showt...166&highlight=

TC-P50V10 Build Date: April 2009
A-Board replaced on 1/4/2010 w/1.24, updated to 1.28.
Current 0% IRE: 0.034FtL
My SM Factory Numbers
Putting the 50V10 downstairs. Bought a new Elite 101FD
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post #5 of 17 Old 12-28-2009, 04:56 AM
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It happens on both mid- and high- range sammys as well - it's just a fact of life with plasma.

The only time I notice it on my sammy is when I see a pre-movie screen or there's a scene with horizontal blinds

I promise, it gets a lot less annoying (mentally) with time.

Have a great day-

-Ian

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post #6 of 17 Old 12-28-2009, 05:03 AM
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That happens with all plasmas, it's called line bleed. The Kuros even have this flaw.

Be a fan of displays, not companies or technologies!
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post #7 of 17 Old 12-28-2009, 06:31 AM
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I've never seen any line bleed on my plasma, and I've looked for it on those green screens. It ain't there.
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post #8 of 17 Old 12-28-2009, 07:02 AM
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Try watching some 4:3 content with gray bars. It's most definitely an issue on 9g Kuros.

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post #9 of 17 Old 12-28-2009, 07:04 AM
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I can't.

My sidemasks are black and I don't plan to change them back.
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post #10 of 17 Old 12-28-2009, 07:09 AM
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What plasma doesn't have the option to use gray? Why would you risk uneven wear of the screen? Uneven wear, especially the 4:3 kind, is very real in today's plasmas.

Whether or not you watch or enough 4:3 or aren't bothered by the risks doesn't mean that the issue does not occur on your display.

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post #11 of 17 Old 12-28-2009, 07:18 AM
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They are gray by default. Permanently changing them to black (and back) requires service menu access in some form.

And I don't care for gray sidemasks. They're visually unnappealing and I don't watch enough 4:3 content to care either way.

And all normal useage of your display creates "uneven wear" unless you watch nothing but solid colors.

It doesn't bother me, it doesn't worry me, and I've never seen any unpleasant visual effects as a result of it.

Do you zoom in movies to eliminate the black letterbox bars?
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post #12 of 17 Old 12-28-2009, 07:31 AM
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Quote:
Originally Posted by tbird8450 View Post

They are gray by default. Permanently changing them to black (and back) requires service menu access in some form.

And I don't care for gray sidemasks. They're visually unnappealing and I don't watch enough 4:3 content to care either way.

And all normal useage of your display creates "uneven wear" unless you watch nothing but solid colors.

It doesn't bother me, it doesn't worry me, and I've never seen any unpleasant visual effects as a result of it.

Do you zoom in movies to eliminate the black letterbox bars?

Wow, I'm done here. Nice strawman

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post #13 of 17 Old 12-28-2009, 07:37 AM
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You asked...

Quote:


Why would you risk uneven wear of the screen?

ALL normal useage of the display creates uneven wear. Period. I do not feel that watching my display normally is dangerous, any more than I feel that black 4:3 sidemasks are dangerous given my viewing habits.

If you feel that black sidemasks are an especially dangerous risk, then it logically follows that you agree that the same is true of letterbox bars.

Are they a risk worth taking in the pursuit of a good image?

But yes, we are way off topic now.

I'm done, too.
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post #14 of 17 Old 12-28-2009, 08:48 AM - Thread Starter
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Ok, well now I know to call it "line bleed" and I can see others have mentioned it elsewhere.

Logic and my OCD tell me that therefore some degree of image degradation related to this phenomena is occurring at all times even if it's only plainly visible with images such as the above. I have also seen it in scenes with horizontal white window blinds, and on some Fox news broadcasts.
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post #15 of 17 Old 12-28-2009, 08:51 AM
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ive never seen it on my 9g kuro pioneer but i have seen it on other displays i own. i say if you can't see it watching normal content forget about it.
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post #16 of 17 Old 12-28-2009, 09:09 AM
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I have a samsung pn50a510, I did not used to have this line bleeding problem, but after a panel replacement for another problem I now do. I argued with samsung forever about this line bleeding. but they say that it is normal and my panel is within spec. I have looked and seen it on other samsungs and panasonics in the store. It seems to vary from tv to tv though. I have learned to ignore it and it does not really bother me anymore, its really only on commercials and such with white screens and black text.
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post #17 of 17 Old 12-28-2009, 11:48 AM
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I used to have it on my hp lcd. Don't see it at all on my Panny g15. The only way it would be bothersome to me is maybe if it happened in subtitles. I watched Inglorious Basterds yesterday and never noticed it so I'm not worried.

I do get the banding that jackal posted about but that is different from what you are talking about I think (and I never even see that except for a few specific situations with gradual color change).

What I think you are describing is when you have text the picture is altered horizontally from the text like this:

|====text===|

Where the = is the picture flaw.

PS: Sorry I can't see your pictures.

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