plasma screen "rainbows"? - AVS Forum
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post #1 of 14 Old 10-20-2011, 08:45 PM - Thread Starter
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so i bought a p42st30 and was loving every minute of it when my girlfriend casually mentioned while watching it "i hate how this tv has rainbows". now i can never unsee it and it is my curse. whenever there are fast moving solid whites, or sometimes when you move your eyes fast across the screen or out of the corner of your eye briefly, you can see "rainbows" or the red blue green of the pixels rather. anyone else notice this? is it fixable? (kinda doubt it)
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post #2 of 14 Old 10-21-2011, 12:35 AM
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It's called "phosphor lag" and I feel that on my three Panny plasmas it diminished over time. Also, make sure the contrast isn't too high (as in "store mode"), as that drives the peak whites to hang on apparently longer.

Here's more chat on the topic.
http://boards.ign.com/dvd_home_theat...07/r176394155/

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post #3 of 14 Old 10-21-2011, 03:06 PM - Thread Starter
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interesting. so do you think it has diminished over time or that you grew accustomed to it? this is a new tv and on the link you provided they said that after the break in it is greatly reduced. truth?
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post #4 of 14 Old 10-23-2011, 03:10 AM
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I'm really sensitive to this, It won't go away.
I had several plasmas, phosphor lag exhibits differently on every set.
trails can be reduced by overdrive like samsung does[if it is the right term, i;m not sure], but moving objects have little noise
all pannys have more or less green trails

but all plasmas I saw have rainbow effect when moving eyes from one side of the screen to another.. higher contrast/luminiscence make it more visible..
I see it clearly but it doesn't distract me
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post #5 of 14 Old 10-23-2011, 11:16 AM - Thread Starter
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post #6 of 14 Old 10-23-2011, 12:12 PM
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you can reduce rainbow produced by eye movement by reducing the contrast, try it, you'll see. It helps alot.
You cannot reduce phosphor trails, but I think your problem is rainbow from eye panning.
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post #7 of 14 Old 10-23-2011, 01:23 PM
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btw: I had huge problems with plasma rainbows too. I even sent my first plasma back.. But after I tried several lcds I had to buy plasma again, overall pq is much better for me...and with lowered CR and time to accustom, it's ok..
My advice is>don't let this problem to spoil your nice set
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post #8 of 14 Old 10-25-2011, 09:14 AM
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oh man you are right, I bought 50g30 today and rainbow panning effect is horrible in comparison to my 51d450 samsung and older p42x10 panny, I hope it gets better for my eyes with time..
maybe culprit is neo pdp panel, which has really high contrast
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post #9 of 14 Old 10-26-2011, 09:14 PM - Thread Starter
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tried turning down the contrast. while it did help I'm not sure the trade off of pq is worth it. are there good settings for reducing rainbows?
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post #10 of 14 Old 10-27-2011, 07:28 AM
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I've had my p50st30 for a couple of weeks and I didn't even notice this effect until last night while watching the movie rocknrolla... the rainbow effect was actually making my head hurt as I watched the movie. It's like that flap of skin you get on the roof of your mouth after eating hot pizza... you know its there and you really don't want to touch it but once you know it's there you just can't help yourself I could feel myself just scanning the set from side to side the entire movie and it was very distracting...
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post #11 of 14 Old 10-28-2011, 04:25 AM
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rainbow effect on my g30 has mostly green flashes for my eyes.
I noticed my G30 set has very bad green tint on all modes ! even thx..
I turned on proffesionl settings and edited white ballance option - turn down green -15 notches !! white is pure white now and rainbows are better
the are mainly yellow/red/brown and less visible overall..
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post #12 of 14 Old 10-28-2011, 07:04 PM
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ST, G, GT and VT panels have shorter decay time. So the afterglow is less noticeable.

Samsung plasmas are driven differently and have negligible phosphorus lag. Samsung plasmas are also free from flicker
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post #13 of 14 Old 10-28-2011, 07:49 PM
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Quote:
Originally Posted by Nielo TM View Post

ST, G, GT and VT panels have shorter decay time. So the afterglow is less noticeable.

AFAIK all PDP manufacturers are using, or at the very least developed, short decay phosphors.

Quote:
Originally Posted by Nielo TM View Post

Samsung plasmas are driven differently and have negligible phosphorus lag. Samsung plasmas are also free from flicker

Driven differently how? And how are they able to eliminate flicker? Just curious

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post #14 of 14 Old 10-29-2011, 10:16 AM
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I wish I know but I can't get that information out of Samsung. Every time I bring up Plasma tech, they shoot it down as if they are only interested in LCDs. Even during tech briefs, they failed to include PDP. But the way the panel is driven is different to Panasonic that much I know. As you know, Samsung plasmas are significantly brighter and have different motion signature to Panasonic.

PS: I haven’t had the time to dig around recently. Hopefully you're more successful.

PPS: On a slightly off topic, I have feeling Samsung may take the lead in PDP tech very soon. After all, they have everything nailed except for the black level, which isn't that far off.
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