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It's official. I see a rainbow-like effect on every plasma.

149K views 882 replies 268 participants last post by  sawfish 
#1 ·
I now have to add plasma to the list of new technologies that I see rainbows on. What a shame, really, 'cause plasma is - in my opinion - the best advanced technology on the market.


The thing that's most interesting to me is, not only do I see a rainbow-like effect on plasma - which manifests as almost hurtful quick yellow flashes during high-contrast scenes - but the effect is actually more irritating to me than the rainbows I see on DLP.


In light of these new developments, it seems that I'm resigned to only a few types of technologies: FP LCD, RP LCD (which I loathe), RP CRT and Direct-View CRT. The only problem is, the TV I will be buying will be going in my bedroom, roughly 8 ft. back from my bed. This leaves RP LCD and RP CRT out of the equation. The only LCD I remotely like is the 40" Sony XBR. The only direct-view CRT I remotely like is the 34" XBR 960. I can't begin to tell you guys just how disappointed I am about all this.


By the way, has anyone here had any experience with the BenQ 37" LCD available at TVA? It sounds like a sweet deal - and it's 1080p .... shame about it having only one component video input, though.


Any input, help or suggestions would be greatly appreciated.


Thanks, guys.
 
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#453 ·
stardamage - I see these flashes on my TH-50PHD8UK with ONE exception - HD material which is brightly lit (like football, etc).


On any other material - I see them, and they are PITA.


Folks who see them tend to see them on ALL plasmas, but it may be possible that you'll see less of them on other brands.


I'd go to a retailer which has darkened viewing rooms, like Harvey's, Magnolia, etc. I'd take a DVD with me that clearly shows flashes, and I would audition the plasmas with that DVD. I'd dart my eyes left and right for good measure while watching.



In fact, I'll probably do it in 1-2 years when I am ready to upgrade, hoping that the new crop of plasmas will have that problem eliminated or significantly lessened (not holding my breath, though). Otherwise, it's LCD time for me.
 
#454 ·
I recently purchased a Pioneer 427XD (UK Model) plasma, having previously owned a Panasonic LCD. Whilst the picture is fantastic, I see yellow flashes quite frequently on DVD's, and find it distracting, almost having to refocus my eyes on what I was viewing.


Does the effect lessen the more the screen is used, or will it always be as bad?


I know you can try and ignore something like this, but I'm not looking for it and still find it jarring and it affects my concentration.
 
#455 ·

Quote:
Originally Posted by McKinley /forum/post/0


I recently purchased a Pioneer 427XD (UK Model) plasma, having previously owned a Panasonic LCD. Whilst the picture is fantastic, I see yellow flashes quite frequently on DVD's, and find it distracting, almost having to refocus my eyes on what I was viewing.


Does the effect lessen the more the screen is used, or will it always be as bad?


I know you can try and ignore something like this, but I'm not looking for it and still find it jarring and it affects my concentration.

McKinley - the effect did not lessen for me over time. It varies from DVD to DVD, obviously. I tend to see more flashes with high contrast material (ie bright objects on a dark background).


Try reducing the contrast on your plasma - it may help.


I am not sure if a good outboard processor helps. I am afraid this "problem" affects too few people, hence there is relatively little info out there.
 
#456 ·
Not sure if this is related, but I found this on Wikipedia from an article about human vision.

Afterimages
After exposure to strong light in their sensitivity range, photoreceptors of a given type become desensitized. For a few seconds after the light ceases, they will continue to signal less strongly than they otherwise would. Colors observed during that period will appear to lack the color component detected by the desensitized photoreceptors. This effect is responsible for the phenomenon of afterimages, in which the eye may continue to see a bright figure after looking away from it, but in a complementary color.
 
#457 ·

Quote:
Originally Posted by wojtek /forum/post/0


McKinley - the effect did not lessen for me over time. It varies from DVD to DVD, obviously. I tend to see more flashes with high contrast material (ie bright objects on a dark background).


Try reducing the contrast on your plasma - it may help.


I am not sure if a good outboard processor helps. I am afraid this "problem" affects too few people, hence there is relatively little info out there.

Thanks for the reply.

Unfortunately I originally had the contrast low (now calibrated with DVE) for running in, but still saw the flashes then anyway.


I was really hoping that the phosphor would 'settle' after a reasonable number of hours were clocked up, and that the red and green would hang around a little less than when the panel was new. Sadly if this doesn't happen I'm going to be stuck with an effect I can't help but see even if I'm ignoring it



Don't want to go back to LCD, but don't seem to have a lot of choice.
 
#458 ·

Quote:
Originally Posted by McKinley /forum/post/0


Thanks for the reply.

Unfortunately I originally had the contrast low (now calibrated with DVE) for running in, but still saw the flashes then anyway.


I was really hoping that the phosphor would 'settle' after a reasonable number of hours were clocked up, and that the red and green would hang around a little less than when the panel was new. Sadly if this doesn't happen I'm going to be stuck with an effect I can't help but see even if I'm ignoring it



Don't want to go back to LCD, but don't seem to have a lot of choice.

You, I, and about 200 other people in the world are in the same boat, unfortunately...



I plan to put up with my plasma for another 2 years, by which time, I hope, LCD will deliver a display I can live with.


Luckily, live sports in HD look great on my plasma, and that's what I care about (for now).
 
#459 ·
As i wrote above, these yellow trails have been dring me nuts.

Im not sure yet as its only been a day, but i'v been off work with the flu and i didn't notice any trails. I thought maybe its because its a bright day outside, but then i tried it in a darkened room and still very little signs of any trails.


So i thought what else is differant and i worked out that because i was ill i was just staring at the middle of the screen like a zombie, which is probably what you usually do more or less. The first week or so i had the tv i didnt notice any, but then once i noticed the problem my eyes are allways very busy moving left and right.


All im saying is today because i didnt even think of looking for it there was very little, and to me it was an acceptable days viewing. I may be completely wrong so take it with a pinch of salt rather than getting your hopes up too much.


I also think it would explain the headaches as its more likely people would get them from constant sharp eye movemant whilst looking at the telly than from the traces/rainbow itself.
 
#462 ·
Just wanted to contribute my 2 cents. I just bought a Pioneer 5070. Hadn't expected to see any artifacts as usually I don't think I'm that sensitive to that sort of thing, but I also see the rainbow effect. For me it is more of a rainbow than pure yellow. I believe it's mostly yellow with a little bit of red and blue and the end. I only see it in very high contrast scenes -- mostly dark with just small areas of very bright light. I saw it most recently while watching Battlestar Galactica. It is almost unnoticeable during daytime but very noticeable at night, and for me almost the only time I see it is when I blink, during the blink. I guess that's probably similar to rapid eye movement or shaking your hand in front of your eyes. I have it set to the D-Nice post-break-in settings, so it's turned down quite a bit and not in Dynamic mode or anything. I am sitting about 8 feet away from the TV, and I see it on HD signals from the cable box.
 
#463 ·
OH MY GOD !!!!


This is crazy ... I was out looking at LCD and PDP set today. Reason I am looking for a new set is due to the crazy RBE I see on my current "Short Owned" DLP set that even has a fast 14000 RPM color wheel.


While watching a demo on both the Panasonic Viera TH50PX60 and the Pioneer DP-5070HD I noticed these weird YELLOW FLASHES .... I found it odd, and found it did remind me of my DLP RBE but only in more of a yellow smear streak. So to look into it, I did a search and ended up here.


JUST FRIGGEN GREAT ........ now I am down to LCD as an option.


I may take my chances with the banding and buy the 1080p 52" Sharp LCD set.
 
#464 ·
Just to clarify, I still love my set and the picture it produces. I notice the rainbow, but in such limited circumstances that at least so far it has not negatively impacted my viewing experience. I can live with it just fine. However, if they get to you and you don't like them on a DLP, then I would avoid plasma and go with LCD assuming there isn't some sort of effect there -- has anyone ever reported any form of rainbow on an LCD with or without LED backlighting?
 
#467 ·
I will be going with the 58" Panny 600u. My local shop has fantastic staff that are very helpful in all regards. Very "In The Know" as well, much unlike most local shops.


I only seen the odd yellow flash here and there. But my only fear is once I get it home in my own environment for viewing it does not become an issue.


However, while watching the pioneer elite next to it ... it was sooo easy to spot. I wonder if the differenct gases or whatever mix in the Panny is different. I liked the look of the elite, but I will stay with the Panny since I find the Pioneer FOR SURE showed it off to me a stink load more, when it may be only a minor annoyance on my Panny.


Cheers


*** EDIT March 13th, 2007***


Well as it turns out, I see it like crazy on the Panny as well. I acutally found it MORE annoying than the DLP RBE since the RBE on the DLP was caused by MY EYES moving fast across the screen, but with the PDP I can see it regardless of my eye movement. IT IS ALWAYS THERE ... fast or slow pans. At least with the DLP RBE I can reduce them to a minimum by controlling my eyes... not the case with the PDP.


Slow pan = smaller yellow smear

Fast Pan = Large Smear


Even if I keep my eyes glued I can see them. On an high contrast edge it is in my face.


I was only one day past the 14 day return period and really hope the guys at my local shop help me out with a refund. I have bought from there before WAY BACK and enjoyed dealing with them. I guess the outcome will make or break my relationship with them and decide where my future purchases are made. I do have faith however !!
 
#468 ·
i see this on my westinghouse LVM-37w3 37", it annoys me, I was watching sin city over DVI the other day. From my pc. Jeez the yellow flashes were so annoying i couldnt watch it anymore. I dont really see it while playing xbox 360 though.
 
#470 ·

Quote:
Originally Posted by ChrisWiggles /forum/post/0


You know, perhaps as a solution people could just watch less television...


It's probably the best thing to do all around.
DITTO!
 
#471 ·
Don't see it on my P55 Fujitsu at all. Am I missing something?
 
#474 ·

Quote:
Well... Some people see the Virgin Mary in pancakes, Jesus in trees and Saints in mountains. So... this guy sees rainbows in plasmas

Much like the RBE on DLP, it's a SMALL NUMBER of folks that see this stuff (even small number with the yellow flash in PDP). Don't knock us for what we see .... but rather, be happy "YOU" do not !!


Just because you do not see it does not mean it does not exist. Trust me .... I SEE IT VERY CLEAR .... and it drives me nuts.
 
#476 ·

Quote:
Originally Posted by Ken Ross /forum/post/0


No you're not, the vast majority of plasma owners never report this issue.

Thanks!

I know that Plasma and LCD technology is not perfect and I do see various artifacts on both. Clearly Plasma has less flaws than LCD and CRT is best.

We use high res black and white LCD's for medical imaging and I can tell you they are no where near perfect(backlighting issues, stuck pixels,etc) and most Radiologists prefer CRT. Which is why I choose Plasma for my display.


Anyway I am glad to know that I am not the only one who doesn't see rainbows...
 
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