Database Users

Lots of dead pixels

Hello everyone,
I just booted up my Hero, and I noticed more than 6 dead pixels.
I used these unstuck applications but didn't seem to work...
They only appear when in black, so they ain't that big of an issue but do you think I should send it for repair?
Thanks

Definitely.
I'd send back a 1920x1200 PC screen for less than 6 faulty pixels... it's completely unacceptable for a 320x480 screen.

Dead pixels won't show on a black screen. I'm assuming you mean possibly hot pixels on the boot screen. They're probably specks of dust.
http://forum.xda-developers.com/showthread.php?t=554288

I agree with Switchbitch dead pixels will always been seen the color will be always wrong and not only when its black. still its intresting how dust get up there.

Switchbitch said:
Dead pixels won't show on a black screen. I'm assuming you mean possibly hot pixels on the boot screen. They're probably specks of dust.
http://forum.xda-developers.com/showthread.php?t=554288
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Click to collapse
Well no, they appear after boot screen, too. For example in Market/Settings or wherever black color is.

ZenorGR said:
Well no, they appear after boot screen, too. For example in Market/Settings or wherever black color is.
Click to expand...
Click to collapse
What color does the dead pixel show is it red??

Yeah I think so. I just tried to shake the phone and it seems that they are gone or whatever. But now I can clearly see a dust piece which is white. So I suppose the gap does exist at least in my phone.
Not annoying but oh well... if it gets filled with them I would need to send it for repair.
Does warranty fill these kind of issues?

I might have the same problem but it is no dust or hot pixel but the space between pixels.
It seems to me the film layer wasn't cut properly in the factory with the result that backlight shines between the dark pixels.
It isn't dust because there is no sidelight to light up dust and the spots are shining very bright white so the light definately comes from the back.
Furthermore my screen fits fine into the casing.
Maybe it is because I always have the brightness at full I notice it more than others. When I run Spark in classic mode or Draw! you get a complely black screen to test it... a pixel-test program is an option also.
I noticed it in the beginning when 3 positive-dead pixels where so very small they could not be hot pixels. Now, one month after the begin of use it has grown to about 9 of them but they are so very very small that I am not going to make a hassle about it.

AMOLED displays cant display true black...:Screen Discussion :...

As seen by the NoLED app over in the dev section, and in a few other places on the net, people are finding that when they display a black image on their amoled/samoled screens in a dark room there is still light emitted by the display. it is not truly black
I would like to know why!
One thing i hear is about image compression and signal noise causing the pixels to not display #000000 black and instead a variant of black/grey causing the pixel to become lit.
This problem is not an issue during the day, i can't tell the difference when my screen is displaying black or off. but what it does effect is battery life.
If the screen isn't powering down its pixels then it is not saving anywhere near as much power as it could do
Also
How happy are you with your display?
I knew about the pentile problem before buying, however i am not dissatisfied with the display at all. Infact if i did not read up about it i would not have realised there was anything different with the screen.
Text is clear and sharp, images are vibrant, and colours seem true with no issue of pink problems like the desire

looool, look at any lcd screen(tv whatsoever) and you don't have true black, because the backlight is on. Only the best LED LCD screens in TV world have FULL LED backlight that can dim the leds from parts of the screen that are fully black in the processed image.
take care

yup, if you take apart your LCD watch, phone, laptop or monitor
you'll see 2 layers, first layer the LCD/TFT/AMOLED/SAMOLED/etc whatever new technology screen you can think of name it here.
then the bottom layer is pretty much like a light bulb/white led/ccfl or whatever you want to call it to light up the first portion of the screen.
most devices you can control the 2 separate pieces separately via "screen" and "back light"
you'll noticed that usually on software options what specifically lets you control both indedpendly.

Eh.. Yes But the SGS hade OLED screen. So it should be able to turn pixels completly off. My guess is that each led has some very small current applied to it possibly to speed up response off screen.
But it come close to true blacks..
EDIT
OLED screen has NO backlight... Each pixel is an tiny led...
Sent from my GT-I9000 using XDA App

thanks for the heads up, that's good to know
i've yet to take apart a new SGS to figure out how the AMOLED displays works

You guys need educating on displays lol
oled screens have no backlight, thus no backlight bleed.
That means that this is a software issue, unless the screen not powering down completely is intentional

Software issue and nothing more.
Open up the calculator, drag down the numpad, hide the 2 stripes (status bar and numpad drag bar) in the top and bottom of the screen, and tell me if you see any lighting.
There's absolutely nothing.

there is still light emitted. cover up the top and bottom bar with your hands, go into a completely dark room then look into the center of the screen.
There is a uniform glow, just like when looking at a black image in the gallery or browser

It's actually more noticeable if you look AWAY. The peripheral area of your retina will be able to pick up a very feeble amount of light. Feeble, sure, but it's there nonetheless.

seriously, guys?

XQC said:
seriously, guys?
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The problem is that the way it is supposed to work is that if you display black, the screen shouldn't use any energy at all but it is and people can see it and so is using precious battery charge.
The issue is... that apps like noled which were going to display a red dot on the screen to let people know if they had mail waiting or whatever wouldnt use much power at all because they were displaying mainly a black screen but it isnt actually black and still using light so still chews through the power..
hope that made sense.. but that is why people are interested in it..

Ok, I missed the battery part, sorry If so, it is indeed an annoyance...
I thought people were seriously complaining about image quality.

I have the Samsung wave and it uses the same screen technology and I can tell that it does not have true blacks pixels are still lit, I can easily tell that its on and totally off there is a very faint trace amount of light produced..

Since I first got this device and turned it on I have been impressed with the display. I am kind of partial to AMOLED diplays and am, thus, a bit biased. What surprised me was that it "appeared" sharper than the display on the Nexus One. Considering it is slightly larger and at the same resolution I just assumed that it wasn't using the PenTile arrangement - yet it appears that it does in fact use the same subpixel arrangement as the screen on the Nexus One. My point is... now I've forgotten my point. Basically that I am more than satisfied with this display.
As far as the black issue is concerned I have no idea. There must be some reason considering that was one of the supposed strengths of this technology (i.e. true blacks and lower power consumption).
El Mono

wait so why would you display an image if you want to save battery?
really
How many of you have measured how much power is being used up when the display is displaying a true black image(measured with multimeter, or other measuring device)
How many of you have made sure that the glow is not caused by a residual charge in the display?
How many of you know how much time it takes for the "glow" to leave an OLED panel when power is not being applied?
just some food for thought

The thing is, amoled screens were advertised as having true blacks and having the pixels off when displaying black. this is clearly not the case

It's not an issue with the technology. The screen doesn't have a back lighting panel, so i think it's more of a problem of what shade is default defined as "black" in the system, or something with any current running through the screen.

Well considering the screen doesn't turn off when displaying a 100% black bitmap image, its safe to say that the say that the pixels NEVER turn themselves off during use when displaying black

Could be the screen isn't calibrated properly, or they lied to us about the tech(wouldn't be the first time).

While its not "true black" it is defenently beyond what any backlit screentype can do regarding blacks.
Except perhaps for the retina display forged by god himself
But I agree that if Samsung states True black then it should be able to do that.
Sent from my GT-I9000 using XDA App

[Q]Dust or Dead pixels ?

How can i tell the difference between them , i have a few little dots on the top left of my screen i notice it when i turn the phone on and also when the screen is off.

If it's in the top left, that's likely dust. That's a problem area in HTC quality control for this device.
Also, if they are there when the screen is off then its' certainly dust.
Dead pixels do 1 of 2 things. They either don't work at all so they are black when the rest of the screen is on, or they stay 1 color constantly lit so they are lit when the rest of the screen is black (not off)
If the screen is powered off, even dead pixels don't stay lit.
Also, dead pixels aren't nearly the common problem they were on LCD screens just 5-7 years ago. I remember going through multiple computers monitors once trying to find a good one when LCD monitors first became affordable. It was a nightmare.
Now...you can buy $1000 big screen LCD TV's and not even worry about it.

Anyone ever come up with a solution to the corner dust problem. I have a patch about 1/2 inch by 1/2 inch in that corner and it's so thick I can't see the notifications in bright sunlight. I'd rather not take it apart and wondered if a powerful vacuum or something might work?

Most people send it back in for a replacement

Very simple - if you can see something even when display is off then its dust else dead pixel.

Fix uneven/yellow screen with intentional burn-in

So I was on my 2nd Nexus 6P and like the first it had an uneven screen. Normal/slightly pink at the top and at the bottom it's more yellow. Instead of returning it I've decided to try and fix the yellow tint by intentionally causing a burn-in on the over-enthusiastic green pixels in the bottom half of my screen.
To do this I flashed a kernel which unlocks the high-brightness mode of the display, the awesome EX kernel, set my screen timeout to 15 minutes and left the display turned on for 3x15 minutes in high brightness mode with a black-to-green gradient open full screen in the Photos app (absolutely nothing else on screen). After each of the 15 minutes I checked the progress, after the 3rd time I considered it done. I'm happy to report that this has nearly eliminated my uneven screen problem.
So far I've seen no ill effects, just a nice even screen.
I used this black-to-green gradient that was a close match to where my screen was yellow. My first 6P had a different pattern of yellowness, so that would have required a different gradient, more like black-green-black.

Interesting, the normal slightly pink at the top transitioning to yellow at the bottom describes the screen on my original nexus 6P and it's replacement.
I'll look into giving this a try as well.

I´m not sure if something like this could be considered as a defect. If you look at a very high angle, you might see some sort of "rainbow effect" on the screen. You should be careful about "burning in" Pixels in a Amoled screen. High brightness will wear out the LEDs faster than you think. At least this is how I remember my old Samsung Galaxy S3 but maybe Amoled technology has improved a lot.

Gorgtech said:
I´m not sure if something like this could be considered as a defect. If you look at a very high angle, you might see some sort of "rainbow effect" on the screen. You should be careful about "burning in" Pixels in a Amoled screen. High brightness will wear out the LEDs faster than you think. At least this is how I remember my old Samsung Galaxy S3 but maybe Amoled technology has improved a lot.
Click to expand...
Click to collapse
I can't really comment on if the OP's method is safe or not, but it is worth noting that the gradient/tint change is noticeable even when viewed straight on under normal use, such as browsing etc.
It could sort of be likened to the old TN based flat screens from a number of years ago where the top and bottom looked slightly different colours, however a lot of this was down to narrow viewing angles. I'm wondering if the same applies to the specific AMOLED display used by the 6P as well.
The AMOLED screens on my Moto X 2nd Gen and Moto X Force don't have the same problem.

I have a slight purple tint too on the screen but it is only visible on a white background. It does not bother me, if you set a higher brightness it is barely visible. Maybe all Nexus 6P have this sort of display and you simply have to live with it.
Azarin said:
I can't really comment on if the OP's method is safe or not, but it is worth noting that the gradient/tint change is noticeable even when viewed straight on under normal use, such as browsing etc.
It could sort of be likened to the old TN based flat screens from a number of years ago where the top and bottom looked slightly different colours, however a lot of this was down to narrow viewing angles. I'm wondering if the same applies to the specific AMOLED display used by the 6P as well.
The AMOLED screens on my Moto X 2nd Gen and Moto X Force don't have the same problem.
Click to expand...
Click to collapse

Would you happen to have a before image for your screen? I would like to try this on my phone but can't say for sure what exact color the uneven section is. Most of the screen seems to have a pink tint that fades into a green/yellow tint in the bottom left corner. I don't want to stress the wrong color accidentally.

Can you post before and after pics of your screen please?

Gorgtech said:
I have a slight purple tint too on the screen but it is only visible on a white background. It does not bother me, if you set a higher brightness it is barely visible. Maybe all Nexus 6P have this sort of display and you simply have to live with it.
Click to expand...
Click to collapse
Its a well known characteristic of samsung AMOLED screens. Samsung users have been complaining about this for some time. Its actually worse on the sgs6. But more brightness will make it less noticeable. Honestly, if you forget about it and stop focusing on it, you will stop noticing it.

Yeah I understand some are really bad you should send it back.but if its slight. There's no.point obsessing about it. It takes the joy away from using the phone

android4life92 said:
Yeah I understand some are really bad you should send it back.but if its slight. There's no.point obsessing about it. It takes the joy away from using the phone
Click to expand...
Click to collapse
It's impossible not obsessing about it since the display is very thing you look at when using a phone, people wouldnt tolerate if it was an LCD, dead pixels or any other defect at the advertised price, but since it's amoled we should be expected that these errors occur.
The issue on slight displays is that the screen is uneven on white, so its impossible to ignore on web browsing and how dark ui and gapps is not provided by Google, I would prefer it to be slightly pink/blue all over not half so you won't notice it.
Not meaning to rant and whine but consumers shouldn't have to accept this or fix the issue themselves, when I show the phone of friends, they notice the inconsistent white background and are shocked when I say its something you have to live with, the features are not going to outweigh the display issue
The joy of the phone is still there, just wish they implement quality control.

I complained about this on my Nexus 6. Ended up buying and returning a total of about 8 phones from various stores until i found the "perfect" one. Its incredibly irritating when you can notice it and its the first thing you see when the pixels light up. Some people may care more than others but im not willing to compromise anymore. AMOLED displays look great, but LCDs seem to have a better yield or QA. I was of course down voted and flamed about this. Good to see people starting to take action against garbage quality AMOLEDs.

ariekanarienl said:
So I was on my 2nd Nexus 6P and like the first it had an uneven screen. Normal/slightly pink at the top and at the bottom it's more yellow. Instead of returning it I've decided to try and fix the yellow tint by intentionally causing a burn-in on the over-enthusiastic green pixels in the bottom half of my screen.
To do this I flashed a kernel which unlocks the high-brightness mode of the display, the awesome EX kernel, set my screen timeout to 15 minutes and left the display turned on for 3x15 minutes in high brightness mode with a black-to-green gradient open full screen in the Photos app (absolutely nothing else on screen). After each of the 15 minutes I checked the progress, after the 3rd time I considered it done. I'm happy to report that this has nearly eliminated my uneven screen problem.
So far I've seen no ill effects, just a nice even screen.
I used this black-to-green gradient that was a close match to where my screen was yellow. My first 6P had a different pattern of yellowness, so that would have required a different gradient, more like black-green-black.
Click to expand...
Click to collapse
This post is old but I wanted to try this nonetheless. You can't just burn in or wear out the pixels in such sort of time no matter what. 45 mis is not enough to cause such an effect. I tried it as I have a screen with the same exactly issue but there is no change. And I did it for far more than you. I let it all the night long for 3 days. There was no change. I don't think you can fix this issue this way (or any other way)

You guys keep saying "AMOLED issue". I bought 6p after having OnePlus X - it has AMOLED without any issue, it was perfect screen! Nexus 6p is great phone, but screen really bothers me... I hate, but I need to replace the phone. And I am not sure whether I will get a good phone or not. Support told me that if I would ask for replacement - they could send me a refurbished phone. Only buying new will give a new phone. I can still return it as I have it for few days...

mariojas89 said:
You guys keep saying "AMOLED issue". I bought 6p after having OnePlus X - it has AMOLED without any issue, it was perfect screen! Nexus 6p is great phone, but screen really bothers me... I hate, but I need to replace the phone. And I am not sure whether I will get a good phone or not. Support told me that if I would ask for replacement - they could send me a refurbished phone. Only buying new will give a new phone. I can still return it as I have it for few days...
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Click to collapse
Hey,
Seriously, a refurbished device just after a few days? Like you had it for 10 months, lol? Is it Huawei?
Escalate the case to a supervisor and don't give up until you get a "proper" new phone!
Good luck...

S10+ owners: does your screen have a pink (or any other color) tint?

I just bought a S10+ off ebay and though the phone is in good shape with decent battery life still, the screen has a pink tint. This is very obvious because I use dark mode everywhere and white text and icons are pink / purple and not white, whether in natural mode or vivid. It's noticeable by itself, but when put next to an iphone with LCD (which are fairly accurate color-wise), it's like UGH that looks bad. It's like the LEDs on cheap RGB keyboards that are pink / yellow / purple / green when they're supposed to be white.
the seller has 30 day free return and I'm trying to decide if I should roll the dice and exchange for another one (they're a business and have a bunch of these). So I want to ask S10+ owners: Does your white text have a pink (or any color) tint, and how long have you had your phone?
thanks

The S10+ exceeds (or should) the iPhones display specs.
The white balance should be near perfect.
Use Screen Test to better evaluate the display. It may be the blue pixels have stated to degraded.
The red pixels generally have the longest lifespan.
Unless a factory reset fixes it, I would return it.
You can get a new, factory sealed box one here.
Or a new unlocked N10+ Snapdragon. This where I got my 2nd N10+ 3 months ago. No doubt about it's history or usage as it's been sitting on a shelf.

blackhawk said:
The S10+ exceeds (or should) the iPhones display specs.
The white balance should be near perfect.
Use Screen Test to better evaluate the display. It may be the blue pixels have stated to degraded.
The red pixels generally have the longest lifespan.
Unless a factory reset fixes it, I would return it.
You can get a new, factory sealed box one here.
Or a new unlocked N10+ Snapdragon. This where I got my 2nd N10+ 3 months ago. No doubt about it's history or usage as it's been sitting on a shelf.
Click to expand...
Click to collapse
I have no doubt the screen is great when new. I'm talking about what happens to the screen once it's been in use for a few years

barth2 said:
I have no doubt the screen is great when new. I'm talking about what happens to the screen once it's been in use for a few years
Click to expand...
Click to collapse
You replace it.
My N10+ that's been heavily used for 2 years shows no color shift, decrease in max brightness, dead pixels etc.
However I'm careful to keep the brightness below 50% almost always. If I use it in the sun it's for seconds, it almost never sees direct sunlight.
I use manual brightness control.