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Is it possible for light leakage to get better as time goes on? - Page 3

post #41 of 77
4/16/05 at 4:05pm
Quote:
Originally Posted by ForceCalibur
Why do you guys get bothered with light leakage btw? Do you guys even know how LCDs work? Because, its not like it affects the screen or if it had no leakage, it would somehow be brighter or something.
The light leakage on my system isn't that bad, and I don't really notice it under normal laptop use. However, all of my dvd movies are widescreen and when I play them they show the black bars on the screen. My eyes get drawn to the bottom when that black bar shows the light leakage.

So, it is noticeable under real-world useage.
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post #42 of 77
4/16/05 at 5:17pm
Quote:
Originally Posted by Despotes
How do you explain the leakage that is not around the edges? Look at the 2 spots near the top. I see them in movies and graphics too.
There's no way for me to say for sure, but I suspect that some of the light leaking from below is reflecting around in front of the lcd layers (but below the surface glass). The glass (or plastic) at the front has a refractive index (RI). Light that hits it at a certain angle (depending on the RI) is going to reflect rather than going through. Thus, if you have light leakage from below, some of that light is going to be reflected off the front surface of the screen back towards the LCD and then reflected again back out resulting in patchy spots of light elsewhere. Patchy probably because the screen surface on the LCD is not PERFECTLY flush. Which it wouldn't need to be if there wasn't light leaking from below.

The fact that you see them when you're watching movies or have images up, only reinforce my belief that the light leakage is from the front of the screen, rather than from behind (which would suggest an actual LCD manufacturing defect).

Plus, I suspect the spots are somewhat accentuated in your pics, since you can see that the Windows logo is flared.
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post #43 of 77
4/16/05 at 5:19pm
Quote:
Originally Posted by flux73
Plus, I suspect the spots are somewhat accentuated in your pics, since you can see that the Windows logo is flared.
Err, I'm pretty sure the logo is flared because it's in motion
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post #44 of 77
4/16/05 at 6:43pm
Quote:
Originally Posted by dellbert
Err, I'm pretty sure the logo is flared because it's in motion
Err, I'm pretty sure motion would cause blurriness. Not white flares. Look at the colored flag. You're saying motion would cause the red green yellow and blue to turn white?
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post #45 of 77
4/16/05 at 8:40pm
I'm gonna go out on a limb and say that the windows logo is "flared" because of the camera (over)exposure.

I'm sure Despotes can tell us whether the logo is the correct color or actually "flared" in person.
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post #46 of 77
4/16/05 at 9:04pm
Yes, it appears the logo is slightly overexposed, but the leakage is what my eyes see. In trying to adjust the exposure for accuracy, the logo always seemed to look overexposed.
When I underexposed the image to get the logo to look accurate, the leakage did not accurately reflect what my eyes were seeing. Strange.
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post #47 of 77
4/16/05 at 9:32pm
Film and digital camera CCDs just have a much lower sensitivity and lower dynamic range than what the human eye sees, so it's very tough to shoot something that looks exactly like what you see in person. Professionals use light meters, exposure, shutter speed and lots of light to approximate a "natural" look squeezed into the narrow exposure range of film, video or digital still cameras.
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post #48 of 77
4/17/05 at 12:23am
I have none of this light leakage on my LG.
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post #49 of 77
4/17/05 at 12:25am
Just FYI, the 6000d I have here, new, has such bad light leakage that in some lighting conditions the leakage covers 50% of the screen.
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post #50 of 77
4/17/05 at 1:13am
I have the samsung and thoughtmaybe Iwas just getting used to it but, I have to agreethat it seems to be improving as time wears on.
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post #51 of 77
4/17/05 at 1:30am
had an lg on the original xps2 w/ leakage on the top and bottom. worse on the bottom, but when my replacement xps2 arrived, the leakage on top of the old system was practically gone and the bottom leakage was getting better. still the new system and screen were better out of the box... no leakage on top, and minimal on the bottom. i'd expect the leakage to fade w/ time. still another lg, thus sparkles, but the don't bother me anymore. i think i'm getting used to them.
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post #52 of 77
4/17/05 at 1:48am
You know its weird, I don't see anymore light leakage on my Samsung! I wish I had my digicam but wife took it w/her. I'll use my cheap webcam and post up some pics of before and after.

Edit: Here is a grainy video I just made using my crap webcam. However, keep in mind I didn't see any light leakage at all and this is max brightness. What I've been doing is just leaving the display on all day even if I wasn't using the laptop and it seems to have helped!

Vid is here: http://www.clan786.com/XPS2/XPS2Samsung.wmv
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post #53 of 77
4/17/05 at 2:09am
This IS getting weird. I'll try leaving the laptop on all night.
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post #54 of 77
4/17/05 at 2:25am
Somebody should take a photo of their black screen each day, so we can get a time-elapsed view of the leakage going away.
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post #55 of 77
4/17/05 at 3:04am
Quote:
Originally Posted by 5150 Joker
You know its weird, I don't see anymore light leakage on my Samsung! I wish I had my digicam but wife took it w/her. I'll use my cheap webcam and post up some pics of before and after.

Edit: Here is a grainy video I just made using my crap webcam. However, keep in mind I didn't see any light leakage at all and this is max brightness. What I've been doing is just leaving the display on all day even if I wasn't using the laptop and it seems to have helped!

Vid is here: http://www.clan786.com/XPS2/XPS2Samsung.wmv
Wow...and I thought my screen was sparkly! j/k

You really did get a perfect screen. Lucky

If it's true that heat makes the LCD break in then I think a little Doom 3 playing will take care of that in no time. That is the game that gets my system the hottest.
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post #56 of 77
4/17/05 at 3:22am
Quote:
Originally Posted by Dragon_Myr
Wow...and I thought my screen was sparkly! j/k

You really did get a perfect screen. Lucky

If it's true that heat makes the LCD break in then I think a little Doom 3 playing will take care of that in no time. That is the game that gets my system the hottest.
Heat from the screen and backlighting is probably not affected that much by Doom3. I think as long as your screen and system are on, it'll warm up. But you don't need any justification to play Doom3 anyhow.
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post #57 of 77
4/17/05 at 3:23am
Quote:
Originally Posted by Dragon_Myr
Wow...and I thought my screen was sparkly! j/k

You really did get a perfect screen. Lucky

If it's true that heat makes the LCD break in then I think a little Doom 3 playing will take care of that in no time. That is the game that gets my system the hottest.
Well its not perfect yet but its getting there. All you guys that have light leakage problems should try what I did - just leave the screen on at full bright all the time and see if it makes any difference. Remember, the light leakage on my screen wasn't that bad to begin with so thats probably why its nearly gone now.
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post #58 of 77
4/17/05 at 4:06am
You know, I'm wondering if part of the problem is simply a burn-in issue. I imagine that they have SO many of these orders now, that they just push them out the door as soon as they're packaged. But normally, the computers have a burn-in period of a couple of days while it runs through memory tests to make sure everything's okay. I'm wondering if a fresh backlight maybe burns a little TOO brightly in the beginning. CCFL's lose half their luminosity over time (don't worry, we're talking 50,000+hours here). And maybe fresh phosphor from a brand new backlight just burns too brightly? It may also explain sparkles. I'd imagine the sparkles come from some uneven electrical discharges occuring at various pixels, perhaps some leftover electrical charge in the screen from the manufacturing process, that may alter the liquid crystal state such that it creates a "sparkle". Given a long enough burn-in period the electrical capacitance would even out and dissipate as well.

To anyone who's noticed sparkles and kept the notebook for longer than a week - have you noticed sparkles also decreasing over time?
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post #59 of 77
4/17/05 at 5:19am
i think the sparkles in my old machine got better w/ time. maybe i was just getting used to them
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post #60 of 77
4/17/05 at 9:14am
The sparkles are created by the coating on the front of the LCD. It has not a thing to do with the liquid crystal itself.

If the light leakage is due to the flourescent light being too bright when first installed, then what explains the ridiculous amount of leakage in my nine year old Gateway?
In fact, that screen seems kind of dim to me. But I have leakage on a black colored background that I estimate takes up 85% of the screen.
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