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Old Nov 19, 2007, 12:02 AM   #1
llTll
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please. i need some help. my iphone screen is cloudy

Hi.

sorry for my first post being complain about the Iphone. but i did register here because i kept reading people's replies and it seems there are some nice people here. so, here is my problem. [ also excuse my english. its not my first language ]

10 days ago, i imported i phone from US. lucky for me. when i got my phone like 3 days ago, i was happy because i didnt have any Dead pixels. however. i noticed that when the screen is black. i kinda see like "blacker " parts in the screen where its darker than the rest. its like " blacker fogs or clouds " at some parts of the screen. i cant notice it unless i have black or very dark gray screen. but i do not know what to make of it.

problem is. i cant return my i phone. its imported. and i am really worried about this. see, i love the phone. i think its amazing. i have seen people complain about the white dots in the screen if its the 7 series etc. but for me, the dead pixel was my only worry. now i have this. i checked my friend iphone. he also has this kind of "foggy black screen ". however i came to notice this is not the case with most of the phones.

so my question is. will this hurt my LCD screen down the road like 1 year from now for example? can it go worst and be noticable even at any color later? or it will just stay like this ?

i will be thankful if some people can tell me whats going on. or give me a good/bad news about my display.
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Old Nov 19, 2007, 12:06 AM   #2
Big-TDI-Guy
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Many LCDs suffer from uneven gradients / bleed through and bleaching.

I've heard a lot of complaints about the European iPhones having this.

Honestly - it is a manufacturing / assembly issue - and I don't believe it will degrade or get worse with age.

The backlight will get dimmer over time (not by that much being LED) but they do - and it might even help reduce that effect.

Also turning down your screen brightness - should help.
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Old Nov 19, 2007, 12:15 AM   #3
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Quote:
Originally Posted by Big-TDI-Guy View Post
Many LCDs suffer from uneven gradients / bleed through and bleaching.

I've heard a lot of complaints about the European iPhones having this.

Honestly - it is a manufacturing / assembly issue - and I don't believe it will degrade or get worse with age.

The backlight will get dimmer over time (not by that much being LED) but they do - and it might even help reduce that effect.

Also turning down your screen brightness - should help.
what does my problem called? uneven graidients or bleeding or bleaching?
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Old Nov 19, 2007, 12:25 AM   #4
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It "sounds like" leaking (I failed to mention before) bleed-through or bleaching. Leaking is especially noticed at the edges of the LCD. It will appear "brighter" near corners and edges. (but not necessarily ALL corners and edges)

Leaking is caused by mis-alignment of the backlight/diffuser and reflector. Or gaps on the edges of the screen. The backlight reflects around, due to gaps and alignment issues, and brightens the LCD from the side. (like how plastic and plexiglass looks "brighter" on edges with light hitting it.) It's simply the reverse effect of that you're seeing.

Bleed-through can be from polarization problems (be polarizing film itself, or even inconsistencies in the liquid crystal. This causes depolarized light to NOT be blocked, and leak through in batches or splotches.

Bleaching is essentially the same as bleed-through, except it's from inadequate polarization ratio / liquid crystal. A poor contrast ratio or weak LCD driver. Or an overly ambitious backlight.

And white / red / green / blue and black pixels are "dead" or "stuck" pixels - depending on the state they are held in. The white is a full stuck "on" and black is a full stuck "off" with Red / Green / Blue being one of the primaries - or sub-pixels stuck. It can be either a problem on the panel itself, or on the panel driver circuit / matrix.
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Old Nov 19, 2007, 12:27 AM   #5
Victor ch
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Quote:
Originally Posted by llTll View Post
what does my problem called? uneven graidients or bleeding or bleaching?
Hi,

Its called "Negative Black" ;well thats what they called it here in MacRumors. MY iPhone has a mild case of this, I say mild because its just barely noticeable and I can live with this, and its not as bad as others i've seen. Its a shame that this happens but the phone is still the BEST out there.

-Victor
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Old Nov 19, 2007, 12:41 AM   #6
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Originally Posted by Big-TDI-Guy View Post
It "sounds like" leaking (I failed to mention before) bleed-through or bleaching. Leaking is especially noticed at the edges of the LCD. It will appear "brighter" near corners and edges. (but not necessarily ALL corners and edges)

.
but mine isnt leaking. i know leaking is when the light on the edges are noticable. it isnt like that. let me try to explain what i see [ sorry i dont have camera beside my iphone camera so i cant take photo of it ]

if you take black photo [ go to dark room, take photo, then view it ] at some parts in the middle of the screen [ not the very far edges ] i see like fog or could that its black color is deeper than the rest of the screen black color. like thse fogs are darker than the rest of the screen. again. you would only notice them when the screen is all black
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Old Nov 19, 2007, 12:42 AM   #7
llTll
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Quote:
Originally Posted by Victor ch View Post
Hi,

Its called "Negative Black" ;well thats what they called it here in MacRumors. MY iPhone has a mild case of this, I say mild because its just barely noticeable and I can live with this, and its not as bad as others i've seen. Its a shame that this happens but the phone is still the BEST out there.

-Victor
Dear Victor.

yes mine isnt that bad. i mean. i would only notice it if i was looking for it [ because i know about it now ] i can live with it if its going to hurt my screen on the long run [ like in a case you would notice it all the time ]
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Old Nov 19, 2007, 12:56 AM   #8
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That would be bleed-through or bleaching. It goes BOTH ways - I should have been clearer on that. Some wave-plates / polarizers aren't very homogenous in the way they "rotate" the light. Especially the caliber you'd find in an LCD (opposed to a laser, for example) This causes areas of lighter and areas of darker "blobs" within the screen. It is almost always more noticeable on a black or very dark screen. (as are dead pixels) But sometimes can be spotted with different colors. It sounds to be the wave-plate / polarizing film that is after the diffuser - and under the LCD panel itself - but inconsistencies in either the LCD or the polarizing film will give the same effect.

The power source physically energizing the LCD panel - can also change this, by applying a higher or lower voltage to certain areas of the screen - causing the polarization state to change - and thereby affect light output.

Bleed-through and bleaching have MANY of the same root causes - and typically are a combination of problems.

I understand english is a second language for you - and I apologize for confusing you.

I really need to fix that, because I have the same problem communicating with my co-workers who don't speak English as a 1st language either.

Sorry.
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Old Nov 19, 2007, 01:16 AM   #9
llTll
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Originally Posted by Big-TDI-Guy View Post
That would be bleed-through or bleaching. It goes BOTH ways - I should have been clearer on that. Some wave-plates / polarizers aren't very homogenous in the way they "rotate" the light. Especially the caliber you'd find in an LCD (opposed to a laser, for example) This causes areas of lighter and areas of darker "blobs" within the screen. It is almost always more noticeable on a black or very dark screen. (as are dead pixels) But sometimes can be spotted with different colors. It sounds to be the wave-plate / polarizing film that is after the diffuser - and under the LCD panel itself - but inconsistencies in either the LCD or the polarizing film will give the same effect.

The power source physically energizing the LCD panel - can also change this, by applying a higher or lower voltage to certain areas of the screen - causing the polarization state to change - and thereby affect light output.

Bleed-through and bleaching have MANY of the same root causes - and typically are a combination of problems.

I understand english is a second language for you - and I apologize for confusing you.

I really need to fix that, because I have the same problem communicating with my co-workers who don't speak English as a 1st language either.

Sorry.
its ok. i can understand what you are trying to say. but i need to ask you if this can effect the screen in the long run. if thse "blobs"/"coulds" will effect the screen in worst way that it would be noticable all the time and ruin my iphone experience. . i asked this because i wanted to know what people think of this issue so if anyone does know about it, i would like to learn more of what they think.
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Old Nov 19, 2007, 01:21 AM   #10
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Quote:
Originally Posted by llTll View Post
its ok. i can understand what you are trying to say. but i need to ask you if this can effect the screen in the long run. if thse "blobs"/"coulds" will effect the screen in worst way that it would be noticable all the time and ruin my iphone experience. . i asked this because i wanted to know what people think of this issue so if anyone does know about it, i would like to learn more of what they think.
It really is only going to rear it's ugly head on very dark screens. Just to see - pull up a very bright screen - see how noticeable it is then. I can't promise you anything because many things can change - and I've never even seen this display - BUT - the problem you are seeing should NOT get worse over time. It may even improve - if it's stress related. (relaxing or release of stress-induce birefringence) Don't COUNT on it - but it might.

Also - as I mentioned earlier - it might even become less noticeable as the backlight gradually dims down over time.

Last of all - depending on your mental state - you might even get used to it, and fail to notice in the future most of the time. But on the flip side of that - some people get frustrated on things like this and can dwell on it - making the problem "worse" in your mind.
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