Develop Bugs

Amoled black isn't as black as we thought?

I've found out, that the Amoled can't display perfect black. I tried the desktop clock thing, the blackle Google page (scrolled to black only area), and I made a photo in PhotoShop completely black and open it up in gallery.
What I noticed is, that the screen still is displaying something when it should be black. This is very easy to see if you put the phone to sleep when displaying such black.
What am I missing? Doesn't the Amoled completely turn of a pixel that is black? Can someone try to replicate this?
Do you think it's possible that I have an lcd desire and just don't know it?
Sent from my HTC Desire

I have also a Hero (with lcd display) and black on my Desire is "more black" than Hero's
For me it's ok

If you look at LCD screens through a circular polarisation filter you'll sometimes see coloured patterns on it, or it will get completely filtered out at a certain angle. To the best of my knowledge, OLEDs don't emit polarised light, so if you've been to see Avatar or another movie in Real3D and walked away with the glasses then you can use them as an LCD detector...
(The blacking out effect works as a cool CSI-esque monitor dust detector)

No disrespect, but... who cares???
So the blacks are not as deep as say, a Kuro plasma. This is a smartphone, not a home theater tv.

Jaa-Yoo said:
No disrespect, but... who cares???
So the blacks are not as deep as say, a Kuro plasma. This is a smartphone, not a home theater tv.
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no disrespect but,...
well real black "off pixel" don't use power so all the people who care about batterylife might care...
s.

I don't think they do emit light on blacks. I have noticed that in a completely dark room I can't see blacks on my Desire at all, it emits no visual light. Maybe the black you were testing isn't pure black.
Sent from my HTC Desire

"It's like, how much more black could this be? And the answer is none. None more black."
Couldn't help myself
Sent from my HTC Desire using XDA App

I do agree that it is much better than any lcd. BUT black should be no light at all. When you turn off the screen when all the pixels are supposed to be off, you see a change. You can also see the outline of the screen when it is in any of the previously mentioned methods of darkness.
Sent from my HTC Desire

I did the following test :
- found a room where I could be in complete darkness
- used the following enclosed file (a pure RGB=(0,0,0) 800x480 png file) and displayed it fullscreen on my phone.
- use the palm of a hand to cover the 4 lit buttons
- the screen is pretty damn BLACK ! (an LCD screen, next to it, also displaying black pixels, would look like a torchlight)
- After a minute or so, the eyes getting used to the darkness, I could very slightly see the screen. I don't know how the phone is built, but I'm guessing it's a light "leak" coming from the LED(s) of the 4 buttons.
I tried this procedure at various brightness settings (from min to max) : the remaining light coming from the screen did not change.
Is there a mod to kill the buttons backlight ?

It is possible to kill the backlights, but have not tried it myself.
http://forum.xda-developers.com/showthread.php?t=704977&highlight=buttons+backlight

Ok, switched off the buttons backlight thx to Flaggie. The screen indeed still emits some light when displaying a full screen black picture. Strange.
It would be interesting to get an explanation from HTC about this, but i'm pretty sure it pointless hoping they would reply to such a question. I'll give it a try...

Perhaps you hae one of those new Desire models with a LCD screen?

No, I bought it the day it came out. Try out on your own. The test I detailed is pretty straight forward...

kekkle said:
Perhaps you hae one of those new Desire models with a LCD screen?
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That is what I thought at first, but than the amount of light on dark would change when you change the brightness.
I want to know what HTC has to say about this.
PS: I bought my phone in June.
Sent from my HTC Desire

OMG does any of you know how a led screen works? lol Active Matrix Organic Light Emitting Diode its name clearly states that the pixels are self-illuminating so clearly unless the screen is of the display is always going to give some light off

It is actually the other way around. They are self emitting, they can turn off. LCDs, however have a backlight, which doesn't turn off, so some light still passes through.
Sent from my HTC Desire

OLED can havae infinate contrast ratios. I have a cowon s9, it has an OLED screen and in a pitch black room you cannot tell it's on. The desire does emit some light even on true black :-/

AndroHero said:
OMG does any of you know how a led screen works? lol Active Matrix Organic Light Emitting Diode its name clearly states that the pixels are self-illuminating so clearly unless the screen is of the display is always going to give some light off
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OMG please read the Wikipedia article...

Unlike over saturated colors and Pentile jagginess which are clearly visible and to some point distracting (at least to me) this seem like pure academic issue, since it can be visible only in total darkness and even then it is not visible unless screen is completely black.
What would be practical purpose in looking at black screen in darkness?

vlasac said:
Unlike over saturated colors and Pentile jagginess which are clearly visible and to some point distracting (at least to me) this seem like pure academic issue, since it can be visible only in total darkness and even then it is not visible unless screen is completely black.
What would be practical purpose in looking at black screen in darkness?
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I agree. This is an academic issue, but aren't you a bit disturbed by the fact that there has been soo much talk about this oled screen and its pure black, and it was all a lie?
I think the problem might be in the image to screen processing where it gets converted to the pentile matrix(and over saturated).
Sent from my HTC Desire

[Q] Does your screen look perfect?

Hi!
Does your screen show perfect whites/grays at low/medium brightness?
Here is mine. It's hard to see but there are like bands across the screen, darker than the rest of it. This is really annoying when you are scrolling in webpages with white/gray content.
I've already got replaced one due to similar problem. What about yours?

Far from perfect. When I look at it from a 45° angle, it looks pure white, but any normal people will look at it from a 90° angle and it looks kinda yellowish from that angle. So the screen is NOT perfect by any means, but being said that I'm not changing mine to find a perfect one as I know none exists.
Sent from my GT-N7100 using Tapatalk 2

The colour definitely changes when the screen is tilted but that doesn't really bother me. Apart from that it's gorgeous.

[Q] LG G4 Screen bleed

I have a small light bleeding spot at the bottom slightly to the left part of the screen above the LG logo ... Is it normal ??? Do you experience it on your phone ?? ( on maximum brightness and black background )

Tahersmax said:
I have a small light bleeding spot at the bottom slightly to the left part of the screen above the LG logo ... Is it normal ??? Do you experience it on your phone ?? ( on maximum brightness and black background )
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Had it on my Gpad. I returned it. Nothing you can do can make it go away.

Tahersmax said:
I have a small light bleeding spot at the bottom slightly to the left part of the screen above the LG logo ... Is it normal ??? Do you experience it on your phone ?? ( on maximum brightness and black background )
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For me if this is very small keep your phone and n'joy.
This technology (ips) had this issues and i see other phones and tv's with the same bleeding. For now we can't do anything.
If you want perfect screen you must go on amoled technology.
Στάλθηκε από το LG-H815 μου χρησιμοποιώντας Tapatalk

Sorry for bringing up this old thread.
My two day old G4 has some light bleeding too. I find it pretty annoying and I'm going to try to have it replaced. It's the result or combination of not enough or wrongly positioned adhesive and insufficiently applied pressure during LCD-glass-body/frame assembly or simply a bad panel. In such a case components of the screen can lift or even move within the screen and let light from the backlight shine through the upper layers of the panel. Of course, there can be other reasons for light bleeding. In any case; You don't have to live with it. It's a production error, a quality issue and not a feature in LCD panels. RMA it or get it replaced. You paid hard earned money for it.

LCD ripple on sharp, medium pressure touches at bottom of screen

This video popped u on /r/android on Reddit.
Tested the same thing out on my device (using any completely black background), my device seems to be affected by this as well. Are there anyone else experiencing the same issue? Want confirmation before I decide to get my device exchanged. Mine has a Tianma panel.
EDIT: To test it out you can just download Backlight Bleed Test because it starts off with a black background to tap on

I have the same thing, this is just the way the screen is. That ripple is technically all smart phones and even tvs that have flexible screens. It's because the panels layer is very thin and connected to the LCD panel
Sent from my HTC 10 using XDA-Developers mobile app

Screen issues

I've had 2 Oneplus 3's now, and am now in the process of sending the second unit back for a replacement.
This because the screen wasn't functioning properly, there was lightbleed on both and the screen had a green tint on one side and a red tint on the other side.
Has anyone else experienced issues like this? Is it a known problem, big or small? Or am I just in really bad luck by recieving a bad screen 2 times in a row.

No issue here. Wish the screen was brighter but at least its the same as my g4

ThomBwha said:
I've had 2 Oneplus 3's now, and am now in the process of sending the second unit back for a replacement.
This because the screen wasn't functioning properly, there was lightbleed on both and the screen had a green tint on one side and a red tint on the other side.
Has anyone else experienced issues like this? Is it a known problem, big or small? Or am I just in really bad luck by recieving a bad screen 2 times in a row.
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The problems you're describing are physically impossible on a Super AMOLED display... and to say that it has happened to both OP3s you received is just as absurd. The pre-applied screen protector is pretty crappy, but I mean c'mon... Are you one of those guys who returns things with the smallest imperfections, or perceived imperfections in this case?
Sent from my ONEPLUS A3000 using Tapatalk

Do you have any picture of the defect. So far, your issue is uncommon one for OnePlus 3.
Sent from my ONEPLUS A3000 using XDA-Developers mobile app

rickyx32 said:
The problems you're describing are physically impossible on a Super AMOLED display... and to say that it has happened to both OP3s you received is just as absurd. The pre-applied screen protector is pretty crappy, but I mean c'mon... Are you one of those guys who returns things with the smallest imperfections, or perceived imperfections in this case?
Sent from my ONEPLUS A3000 using Tapatalk
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Woah there, I have no idea how it is possible to have the problems I have, I know that with lcd sometimes the glue causes the device to be lit unevenly, don't know if that could be the case, but it seemed a little off. I tested this using this video on full brightness: https://youtu.be/vu0mQa2EpS4
While going from. Grey to black, the pixels should all turn of at the same time, or at least, that's how I think it should be on amoled. But this wasn't the case on both devices.
As for the different tint problem, that does bother me a lot more, reading Web with a changing color if you read from left to right isn't that good for the eyes or at least It bothered me.

chindynasty said:
Do you have any picture of the defect. So far, your issue is uncommon one for OnePlus 3.
Sent from my ONEPLUS A3000 using XDA-Developers mobile app
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Here are some pictures, it's quite difficult to recreate on camera like I see them but this gives a general idea of what my issues were with the first device. The first being the screen tint, on the left of the screen it seems to be more red and on the right more green, while this is a Grey background at about 50% brightness. The second is how the screen is unevenly lit while on a solid Grey low brightness background.

ThomBwha said:
Here are some pictures, it's quite difficult to recreate on camera like I see them but this gives a general idea of what my issues were with the first device. The first being the screen tint, on the left of the screen it seems to be more red and on the right more green, while this is a Grey background at about 50% brightness. The second is how the screen is unevenly lit while on a solid Grey low brightness background.
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I just watched that LCD test video and firstly my eyes hurt from the bright white light secondly I am quite picky and having come from the g4 which I thought had a great screen (few bleed issues though) I am quite happy. I couldn't see anything at all on my unit like you have so maybe it's device specific?
I have noticed this weird thing though and it's when I use MX player pro to watch films. I have been watching the dark night for like the 20th time on th op3 but do notice the skin tones look a little warm and when i increase brightness it gets worst. I think this is a combination of the pentile display and the AMOLED screen with a lower resolution than we would like. I am sure I remember my galaxy note 3 and wife's s5 looking like this also but could be wrong.
Overall it is strange using g4 then using op3 it's hard to explain but they are just different not just LCD / AMOLED but the calibration also. Love the blacks though it's like the phone is off when the screen goes dark. Nice.

ipmanwck said:
I just watched that LCD test video and firstly my eyes hurt from the bright white light secondly I am quite picky and having come from the g4 which I thought had a great screen (few bleed issues though) I am quite happy. I couldn't see anything at all on my unit like you have so maybe it's device specific?
I have noticed this weird thing though and it's when I use MX player pro to watch films. I have been watching the dark night for like the 20th time on th op3 but do notice the skin tones look a little warm and when i increase brightness it gets worst. I think this is a combination of the pentile display and the AMOLED screen with a lower resolution than we would like. I am sure I remember my galaxy note 3 and wife's s5 looking like this also but could be wrong.
Overall it is strange using g4 then using op3 it's hard to explain but they are just different not just LCD / AMOLED but the calibration also. Love the blacks though it's like the phone is off when the screen goes dark. Nice.
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So the screen turned black fully at the same time, well there's a logo on screen, but apart from that all black?
I know what you mean by that, I think thats in all screens, not sure, but I had it in both screens but also the problems occurred on them too, maybe that's a feature, I at least won't mind at night when the screen is that low and a bit more warm toned. I saw it on a selfie I got on whatsapp, at night when I got it, I saw her face normal, but when I set the screen brighter, I also saw that the photo also had a background! which was invisible and dark on the lowest brightness.

no issues

Didn't see a logo. Must be blind

rickyx32 said:
The problems you're describing are physically impossible on a Super AMOLED display... and to say that it has happened to both OP3s you received is just as absurd. The pre-applied screen protector is pretty crappy, but I mean c'mon... Are you one of those guys who returns things with the smallest imperfections, or perceived imperfections in this case?
Sent from my ONEPLUS A3000 using Tapatalk
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Click to collapse
Smallest imperfection? He uses the screen all the time and notices that all the time, how is that small imperfection? Also amoled screens are known for the issues he described. All screens have that issue. Just people like you are not good enough to notice it while others notice it easily.
Sent from my SAMSUNG-SM-G935A using XDA-Developers mobile app

ipmanwck said:
Didn't see a logo. Must be blind
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This logo, not that important, but YouTube shows it really need to turn that off sometime.