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Fixing LCD "Clouding"

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Old 03-08-2008, 08:28 AM   #1  
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Default Fixing LCD "Clouding"

Hello all!

Just have a general question with LCD "clouding". I have a 42" LG 720p HDTV. I noticed right away when I bought it that the corners were a little brighter than the rest of the screen. Plus, there was some "clouding" in the middle of the screen, but barely noticable even in a dark room. Now, what I did was, was cleaned my TV screen with the cleaning cloth that came with the TV. After that I noticed that the "clouding" was gone from all corners, but the "clouding" had actually moved to other spots in the TV... So with a thought in my head I waited till night time, turned on the TV with no signal running to it, just a black screen, and I started to "clean" the screen to move the liquid around. After about 30-40min of trial and error, I finally got the screen to a perfect, even black level across the whole screen. I was very excited to see the results. But now I am wondering if hurts the LCD panel to do this? If anyone is interested on the way I did it, I will gladly post it here. As is took some time figure out the best sopts to put pressure on.

Has anyone else tried this with success?
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Old 03-08-2008, 08:40 AM   #2  
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I question the fact that you have to do whatever it was you did. Shouldn't the panel be set correctly at manufacture and look good. It seems that if you can move the whatever, it can also move itself over time and get messed up again.

I have a Sammy LCD which has no clouding nor did it ever require a massage to work correctly. If it's a new tv, you might want to exchange it for one which is good from the beginning.
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Old 03-08-2008, 08:48 AM   #3  
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Thats very interesting, I had no idea this could solve the problem...must mean its simply poor quality in the pressing of the panel layers together? Either way I'd be somewhat concerned with what you did...but not to much, LCD is pretty resilient. I poke the screens at my job all the time when pointing stuff out and there is never any damage.
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Old 03-08-2008, 09:07 AM   #4  
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Originally Posted by clearday View Post
I question the fact that you have to do whatever it was you did. Shouldn't the panel be set correctly at manufacture and look good. It seems that if you can move the whatever, it can also move itself over time and get messed up again.

I have a Sammy LCD which has no clouding nor did it ever require a massage to work correctly. If it's a new tv, you might want to exchange it for one which is good from the beginning.
I would have thought that the panny would be set correctly. But I think it was since I can correct the issue with just some light pressure on the screen. Myabe shipping and handling had something to do with it? I don't know. It has been over a week since I did this, and the screen is still even the whole way across. But I will keep an eye on it to see if it goes back to the way it was.
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Old 03-08-2008, 09:10 AM   #5  
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Thats very interesting, I had no idea this could solve the problem...must mean its simply poor quality in the pressing of the panel layers together? Either way I'd be somewhat concerned with what you did...but not to much, LCD is pretty resilient. I poke the screens at my job all the time when pointing stuff out and there is never any damage.
I took extreme measures to give it just a light pressure to do what I did. And everything still looks and works great. I really didnt want to break anything... LOL!
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Old 03-08-2008, 09:56 AM   #6  
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When you lightly touch a laptop computer screen with the tip of
a finger... you will notice a "puddle."

My Geek friends told me not to do that... but they didn't explain why.

So, my advice is... don't do that.

I would imagine that some temperature changes could cause
the screen to slightly warp... giving you the clouds.

all i know.
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Old 03-08-2008, 10:25 AM   #7  
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Quote:
Originally Posted by scootski View Post
When you lightly touch a laptop computer screen with the tip of
a finger... you will notice a "puddle."

My Geek friends told me not to do that... but they didn't explain why.

So, my advice is... don't do that.

I would imagine that some temperature changes could cause
the screen to slightly warp... giving you the clouds.

all i know.
Yeah, I have heard of that too. But, the panel is made to be "cleaned", so I would imagine that a little pressure is cool. Plus, I think the front of the screen is a lot thicker than most other PC flat panel displays. I did take caution when doing it... Everything does seem to be okay. Thank goodness! I thought about the warping factor also. I thought that it may warp back to the original shape. So I am keeping a close eye on it to see if it does. I hope it doesn't as the screen is %100 better than before!
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Old 03-08-2008, 12:00 PM   #8  
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this is how LCD pannels are, clouding is an issue even with top of the line SONY XBR. some of the clouding could be very bad if you sit in darkroom watching tv, in dark scenes these are very visible (movie credits scene for example).
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Old 03-08-2008, 03:55 PM   #9  
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this is how LCD pannels are, clouding is an issue even with top of the line SONY XBR. some of the clouding could be very bad if you sit in darkroom watching tv, in dark scenes these are very visible (movie credits scene for example).
Yeah, I have noticed the clouding with very dark scenes. But only in the corners a tad. Now the screen is even all the way across. The dynamic contrast really helps out a lot also. During dark scenes the backlight automaticly adjust up or down depending on the level of brightness of the scene. Wich I am sure you already know, but it is still a nice feature to have. So far I am really happy with my LG. I have seen Sony's XBR model in some showrooms, absolutly a beautiful picture! Now I dont have a Blu-Ray player yet, but I hear that the HD video blows away even Directv's HD programing, I can't wait! Thanks-
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Old 03-09-2008, 12:51 AM   #10  
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That sounds more like back light bleeding than clouding to me. I would think clouding would be seen even on brighter scenes as well.
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Old 03-09-2008, 07:54 AM   #11  
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Quote:
Originally Posted by processed View Post
Hello all!

Just have a general question with LCD "clouding". I have a 42" LG 720p HDTV. I noticed right away when I bought it that the corners were a little brighter than the rest of the screen. Plus, there was some "clouding" in the middle of the screen, but barely noticable even in a dark room. Now, what I did was, was cleaned my TV screen with the cleaning cloth that came with the TV. After that I noticed that the "clouding" was gone from all corners, but the "clouding" had actually moved to other spots in the TV... So with a thought in my head I waited till night time, turned on the TV with no signal running to it, just a black screen, and I started to "clean" the screen to move the liquid around. After about 30-40min of trial and error, I finally got the screen to a perfect, even black level across the whole screen. I was very excited to see the results. But now I am wondering if hurts the LCD panel to do this? If anyone is interested on the way I did it, I will gladly post it here. As is took some time figure out the best sopts to put pressure on.

Has anyone else tried this with success?
The latest LG LCD panels have rigid columnar spacing between pixels - so I would think you did no harm.
This type construction should add increased rigidity over older type panels - it's design intended to hold all in alignment over the long haul.
For me, to carry a set back and exchange it is a pain. I would bet the set is OK.
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Old 03-09-2008, 08:06 AM   #12  
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The latest LG LCD panels have rigid columnar spacing between pixels - so I would think you did no harm.
This type construction should add increased rigidity over older type panels - it's design intended to hold all in alignment over the long haul.
For me, to carry a set back and exchange it is a pain. I would bet the set is OK.
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Old 07-25-2008, 05:05 PM   #13  
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Quote:
Originally Posted by processed View Post
Hello all!

Just have a general question with LCD "clouding". I have a 42" LG 720p HDTV. I noticed right away when I bought it that the corners were a little brighter than the rest of the screen. Plus, there was some "clouding" in the middle of the screen, but barely noticable even in a dark room. Now, what I did was, was cleaned my TV screen with the cleaning cloth that came with the TV. After that I noticed that the "clouding" was gone from all corners, but the "clouding" had actually moved to other spots in the TV... So with a thought in my head I waited till night time, turned on the TV with no signal running to it, just a black screen, and I started to "clean" the screen to move the liquid around. After about 30-40min of trial and error, I finally got the screen to a perfect, even black level across the whole screen. I was very excited to see the results. But now I am wondering if hurts the LCD panel to do this? If anyone is interested on the way I did it, I will gladly post it here. As is took some time figure out the best sopts to put pressure on.

Has anyone else tried this with success?

Can you please explain how you managed to get the light spots away?
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