Uneven backlight - Blu-ray Forum

hrow · 01-18-2009, 02:26 PM

I picked up a 52" Samsung 650 LCD. Absolutely love the TV but on several sections of the screen - when there is no image (black) - there are lighter areas that can best described as looking foggy. That is they are not well defined but definitely lighter than the rest of the screen. One is about 3 inches in an irregular diameter at the left edge and there are two smaller areas at the right edge directly across from the first and at the top.

Can't see them when there is program material playing so I don't know if this is something to freak over or if it is normal for larger LCDs. Thoughts?

mike79 · 01-18-2009, 03:15 PM

That is unfortunately how lcds are. Usually you will only notice it in the dark. That is why the newer lcds are going to start using led backlighting.

brandonandtiff · 01-18-2009, 03:31 PM

I have the same LCD and the same problem. You are right about not noticing it when the program is playing, it's really only noticeable on black screens.

I have read that lots of LCDs have this problem like mike79 mentions. The 650 is such an incredible LCD that I just try to ignore it, which is pretty easy considering you can't see it when there's actually a movie playing.

So don't feel bad, because if you do some research on the 650 you'll notice that nearly all of them have this problem to some degree. I've even found home-remedies for this that involve opening up the panel

slaizer2000 · 01-18-2009, 04:09 PM

Quote:

Originally Posted by hrow

I picked up a 52" Samsung 650 LCD. Absolutely love the TV but on several sections of the screen - when there is no image (black) - there are lighter areas that can best described as looking foggy. That is they are not well defined but definitely lighter than the rest of the screen. One is about 3 inches in an irregular diameter at the left edge and there are two smaller areas at the right edge directly across from the first and at the top.

Can't see them when there is program material playing so I don't know if this is something to freak over or if it is normal for larger LCDs. Thoughts?

You may want to check out some in the stores to see if yours is normal or worse than normal. I bought 2 vizio LCD for my niece and nephew. 1 was black on black screens, but the other had light areas in some areas around the edges. Took it back and got a replacement which was fine.

So seriously go to the store and check out the display models to see if what your are experiencing is normal or not.

brett_day · 01-18-2009, 04:13 PM

this is also known as clouding and Samsungs are notorious for it! When i bought my 4066f i took 3 sets back before i found one that was accpetable! Thats one downside to LCD's and backlights!

mike79 · 01-18-2009, 04:53 PM

It is hard to notice in because the lighting is so bright. When I bought my Sony xbr2, I returned the first one and checked the new one in the store really good. Got home and at night it was worse than the first one. I had it replaced by Sony. The new one was not as bad but still noticeable. Some sets maybe worse than others so if it is really bad you may want to try and return it.

This is why I bought my first plasma last week.

JR8300 · 01-18-2009, 05:13 PM

Quote:

Originally Posted by brett_day

this is also known as clouding and Samsungs are notorious for it! When i bought my 4066f i took 3 sets back before i found one that was accpetable! Thats one downside to LCD's and backlights!

Kind of a bold statement don't you think (samsungs are notorious)? It's not just Sammy's it's all LCDs. However, Samsung and Sony get more coverage on the issue because they are the main brands. A couple years back Sony was almost put through another civil suit because their XBR line had such terrible mura and they wouldn't acknowledge it as a problem.

Samsung will swap your panel if you call them and it's truly that bad. Just be patient and don't be rude call ECR at 800-522-7341. This is a direct line to Tier 2 they can push all the buttons you need pushed.

Geezer00003 · 01-18-2009, 05:20 PM

On the flip side.
I have no issues with my TV, other than wanting to use it all day.

JR8300 · 01-18-2009, 05:20 PM

I have seen mura rubbed out. It won't 100% disappear but it will be considerably less noticeable. Turn your TV on for a hour or so (until it is warm) take the micro fiber cloth that was included with your set and with a flat palm gently massage in horizontal lines the areas with mura. Massage the mura towards the corners of the set., do this for about 10 mins and you should see the mura pushed away.

The temp extremes that these sets are put through during the shipping process tends to warp the screen a bit. Since the screen is screwed into the bezel there really is no where for the screen to expand to. Yes you can loosen the screws and all that but I would leave that up to a service tech.

JR8300 · 01-18-2009, 05:21 PM

Quote:

Originally Posted by Geezer00003

On the flip side.
I have no issues with my TV, other than wanting to use it all day.

I have the 750 coming this week, I hope I'm as lucky as you.

coolmilo · 01-18-2009, 05:22 PM

My old Sony XBR2 (40 inch) had the clouding problem. After watching it for a few months I hardly noticed the problem. The pricture was very good overall. I do not notice the clouding problem with my 46 inch XBR4. Anyway, there is nothing that can be done about the problem except return the LCD if possible. LED backlight LCD's, Plasma's, LaserTV, and OLED should not have any clouding problems.

tbizzle · 01-18-2009, 06:21 PM

I have the same clouding problem, but I try to ignore it, especially since I'm so happy with the insane PQ. I'm going to get an LED backlight soon and hopefully that will make it less noticeable. Btw, if you want to see how awesome your new TV's colors can be, put in Speed Racer on blu and you will be blown away

hrow · 01-18-2009, 08:43 PM

Thanks for the feed back. It isn't awful and I really only notice it as the credits are rolling. Just wanted to make sure it wasn't an abnormally bad problem.

jbat31 · 07-07-2010, 07:53 PM

Sorry to revive an old thread, but have been wondering if this is something I should call service about.

I have an LG tv and I love it, but in an upper left corner and lower right corner there is some abnormal looking areas, not big, but noticeable on very dark screens. In the case of the upper left corner, a little brighter area, only a small one and in the lower corner, the same thing, but even smaller. Wen an images fills the screen, they can not be seen, but in dark images, or black, they can. Anything to worry about?

Flash78 · 07-08-2010, 08:03 PM

I talked to Samsung i few weeks ago, and told them that i had clouding problem with my samsung UE46 8500. They told me that the clouding problem wasent anything they know about and they wont take it into service.

Its not mutch clouding but its enough to be a disurbing problem.

WalleO · 07-08-2010, 08:21 PM

thats why i gave up on LCD and recently made the switch to plasma. I took back 4 LCDs back to back to BestBuy all of which had the clouding issue. I finally gave in and for the fifth time told bestbuy i would go for a plasma. I've only had the plasma for 3 days now and i can tell you that the clouding/backlight issue i've had with all 4 of my samsung LCDs are nonexisting. the only advantage i see with the LCD is that it was a little brighter overall than my plasma. but even with that, if you properly calibrate it, you may not even notice it. im so glad i finally when Plasma

bigbull2984 · 07-08-2010, 08:48 PM

I have a Sony XBR7 in my bedroom and its the same issue, and I only notice it on a all black screen, but the PQ makes up for it. I only notice it when all the lights are off.

BLURAYSONYES · 07-10-2010, 09:00 AM

I also noticed this on my new Sony 52xbr9. Having it properly calibrated u can hardly see this. My older 46xbr4 was more noticeable. For all Sony LCD owners turn your backlit down to 2-3 and brightness to around 30-35 depending on the model. This way you'll get that rich black and solve your uneven brightness problem. Works for me.

steve1971 · 07-18-2010, 10:47 PM

Quote:

Originally Posted by BLURAYSONYES

I also noticed this on my new Sony 52xbr9. Having it properly calibrated u can hardly see this. My older 46xbr4 was more noticeable. For all Sony LCD owners turn your backlit down to 2-3 and brightness to around 30-35 depending on the model. This way you'll get that rich black and solve your uneven brightness problem. Works for me.

I tried this on my 46inch and it works. The clouding issue is inherant with alot of LCD tv's and I only noticed it on mine when I had all the room lights off and only during really dark scenes of a movie. Over time I got used to it because I hardly noticed it. Now with the settings you suggested they are gone completely. Thanks buddy.

carios23 · 07-19-2010, 05:39 PM

For the summer months you can even set Power Saving Settings to High.

01-18-2009, 02:26 PM	#1
hrow Junior Member Member since:Dec 2008	Uneven backlight I picked up a 52" Samsung 650 LCD. Absolutely love the TV but on several sections of the screen - when there is no image (black) - there are lighter areas that can best described as looking foggy. That is they are not well defined but definitely lighter than the rest of the screen. One is about 3 inches in an irregular diameter at the left edge and there are two smaller areas at the right edge directly across from the first and at the top. Can't see them when there is program material playing so I don't know if this is something to freak over or if it is normal for larger LCDs. Thoughts?

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01-18-2009, 03:15 PM	#2
mike79 Power Member Member since:May 2007 Location:NYC Blu-ray collection:268 Blu-ray reviews:2 Trading Score:1	That is unfortunately how lcds are. Usually you will only notice it in the dark. That is why the newer lcds are going to start using led backlighting.

01-18-2009, 03:31 PM	#3
brandonandtiff Active Member Member since:Aug 2008 Blu-ray collection:151 Trading Score:29	I have the same LCD and the same problem. You are right about not noticing it when the program is playing, it's really only noticeable on black screens. I have read that lots of LCDs have this problem like mike79 mentions. The 650 is such an incredible LCD that I just try to ignore it, which is pretty easy considering you can't see it when there's actually a movie playing. So don't feel bad, because if you do some research on the 650 you'll notice that nearly all of them have this problem to some degree. I've even found home-remedies for this that involve opening up the panel

01-18-2009, 04:13 PM	#5
brett_day Blu-ray Guru Member since:Mar 2008 Location:Moore, Oklahoma Home Theater Gallery:18 Blu-ray collection:45 Blu-ray reviews:1 Trading Score:1	this is also known as clouding and Samsungs are notorious for it! When i bought my 4066f i took 3 sets back before i found one that was accpetable! Thats one downside to LCD's and backlights!

01-18-2009, 04:53 PM	#6
mike79 Power Member Member since:May 2007 Location:NYC Blu-ray collection:268 Blu-ray reviews:2 Trading Score:1	It is hard to notice in because the lighting is so bright. When I bought my Sony xbr2, I returned the first one and checked the new one in the store really good. Got home and at night it was worse than the first one. I had it replaced by Sony. The new one was not as bad but still noticeable. Some sets maybe worse than others so if it is really bad you may want to try and return it. This is why I bought my first plasma last week.

01-18-2009, 05:20 PM	#8
Geezer00003 Senior Member Top ranked HT gallery Member since:Dec 2008 Location:GTA Ontario, Canada Home Theater Gallery:12 4K collection:207 Blu-ray collection:669	On the flip side. I have no issues with my TV, other than wanting to use it all day.

01-18-2009, 05:20 PM	#9
JR8300 Active Member Member since:Jun 2008 Blu-ray collection:33	I have seen mura rubbed out. It won't 100% disappear but it will be considerably less noticeable. Turn your TV on for a hour or so (until it is warm) take the micro fiber cloth that was included with your set and with a flat palm gently massage in horizontal lines the areas with mura. Massage the mura towards the corners of the set., do this for about 10 mins and you should see the mura pushed away. The temp extremes that these sets are put through during the shipping process tends to warp the screen a bit. Since the screen is screwed into the bezel there really is no where for the screen to expand to. Yes you can loosen the screws and all that but I would leave that up to a service tech.

01-18-2009, 05:22 PM	#11
coolmilo Blu-ray Guru Member since:Jan 2007 Location:Silicon Valley Home Theater Gallery:16 Blu-ray reviews:2 Trading Score:2	My old Sony XBR2 (40 inch) had the clouding problem. After watching it for a few months I hardly noticed the problem. The pricture was very good overall. I do not notice the clouding problem with my 46 inch XBR4. Anyway, there is nothing that can be done about the problem except return the LCD if possible. LED backlight LCD's, Plasma's, LaserTV, and OLED should not have any clouding problems.

01-18-2009, 06:21 PM	#12
tbizzle Blu-ray Ninja Top ranked HT gallery Member since:Oct 2008 Location:Folsom, CA Home Theater Gallery:61 4K collection:47 Blu-ray collection:571 Trading Score:55	I have the same clouding problem, but I try to ignore it, especially since I'm so happy with the insane PQ. I'm going to get an LED backlight soon and hopefully that will make it less noticeable. Btw, if you want to see how awesome your new TV's colors can be, put in Speed Racer on blu and you will be blown away

01-18-2009, 08:43 PM	#13
hrow Junior Member Member since:Dec 2008	Thanks for the feed back. It isn't awful and I really only notice it as the credits are rolling. Just wanted to make sure it wasn't an abnormally bad problem.

07-07-2010, 07:53 PM	#14
jbat31 Active Member Member since:Jul 2010	Sorry to revive an old thread, but have been wondering if this is something I should call service about. I have an LG tv and I love it, but in an upper left corner and lower right corner there is some abnormal looking areas, not big, but noticeable on very dark screens. In the case of the upper left corner, a little brighter area, only a small one and in the lower corner, the same thing, but even smaller. Wen an images fills the screen, they can not be seen, but in dark images, or black, they can. Anything to worry about?

07-08-2010, 08:03 PM	#15
Flash78 Active Member Member since:Nov 2009 Location:Sweden Blu-ray collection:80	I talked to Samsung i few weeks ago, and told them that i had clouding problem with my samsung UE46 8500. They told me that the clouding problem wasent anything they know about and they wont take it into service. Its not mutch clouding but its enough to be a disurbing problem.

07-08-2010, 08:21 PM	#16
WalleO Member Member since:Jan 2009 Home Theater Gallery:29 Blu-ray collection:15	thats why i gave up on LCD and recently made the switch to plasma. I took back 4 LCDs back to back to BestBuy all of which had the clouding issue. I finally gave in and for the fifth time told bestbuy i would go for a plasma. I've only had the plasma for 3 days now and i can tell you that the clouding/backlight issue i've had with all 4 of my samsung LCDs are nonexisting. the only advantage i see with the LCD is that it was a little brighter overall than my plasma. but even with that, if you properly calibrate it, you may not even notice it. im so glad i finally when Plasma

07-08-2010, 08:48 PM	#17
bigbull2984 Active Member Top contributor Member since:Oct 2009 Home Theater Gallery:5 Blu-ray collection:94 DVD collection:5 Trading Score:14	I have a Sony XBR7 in my bedroom and its the same issue, and I only notice it on a all black screen, but the PQ makes up for it. I only notice it when all the lights are off.

07-10-2010, 09:00 AM	#18
BLURAYSONYES Banned Member since:May 2007 Location:Irvine, CA Blu-ray collection:157	I also noticed this on my new Sony 52xbr9. Having it properly calibrated u can hardly see this. My older 46xbr4 was more noticeable. For all Sony LCD owners turn your backlit down to 2-3 and brightness to around 30-35 depending on the model. This way you'll get that rich black and solve your uneven brightness problem. Works for me.

07-19-2010, 05:39 PM	#20
carios23 Active Member Member since:Sep 2009 Home Theater Gallery:2 Blu-ray collection:36	For the summer months you can even set Power Saving Settings to High.

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