PWM or backlight failure? - LG G Pad X 8.0 Questions & Answers

I'm experiencing either a defect or an unfortunate feature on this tablet. I just took delivery of a new one, and while viewing any solid colors besides grey on the screen everything is fine (also no dead pixels), but I'm noticing what appears to be slight backlight flickering/pulsing whenever grey or light blue is shown on the screen. It seems to be PWM (pulse width modulation) of the leds, but I can't be certain it's a defect or just the unfortunate way these tablets' led screens are designed. It's a very subtle but consistent and annoying pulse, but it's definitely there. Can anyone confirm that PWM is what's going on with these tablets or if this is a defective screen. The screen doesn't pulse at all on any other colors solid or only partially filling the screen or otherwise.

I haven't noticed anything on mine, though I tend to keep the backlight fairly low (17%).
One thought though which is why I'm saying anything, I remember on the nexus 7 there was an issue with one of the friction pins not connecting to the back of the case's antenna fully sometimes, which would cause the radio/wifi to suck extra power resulting in backlight pulses... have you tried turning on airplane mode (disable the cellular) with wifi off to see if that makes a difference? Though it would be odd if it only affected the one colour... I suppose it could be your ambient light source too, does it do it in sunlight?

joeblowma said:
I haven't noticed anything on mine, though I tend to keep the backlight fairly low (17%).
One thought though which is why I'm saying anything, I remember on the nexus 7 there was an issue with one of the friction pins not connecting to the back of the case's antenna fully sometimes, which would cause the radio/wifi to suck extra power resulting in backlight pulses... have you tried turning on airplane mode (disable the cellular) with wifi off to see if that makes a difference? Though it would be odd if it only affected the one colour... I suppose it could be your ambient light source too, does it do it in sunlight?
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Good idea! Unfortunately, killing the antennas doesn't affect it. And there's no ambient light sensor on the g pad x, so that's out as well I'm so disappointed because there are not dead pixels and only very little light bleed in the corners too.

I didn't mean ambient light sensor would be the cause, more that perhaps you have bulb/s that cycle at a specific rate at a certain colour range that would cause a subtle flicker, I always found those big long roof fixture fluorescent tube lights bad for this sort of thing... I notice some "out of the corner of my eye" subtle flickering on my PC LCD when I have the one CFL on, but not when I have the other LED lamp going instead for example. I just tried a LCD screen tester with various solid colours (cyan, blue) and the only 'flickering' I'm seeing is if I actually move the screen, this panel has some waviness in it that is visible when the screen is off and you angle it just right under a light which seems to pop out on these blues with the backlight turned up - but only when the screen is physically moving. Definitely not a perfect panel, but for me nothing like what you are talking about.
I'm outta ideas though, unless you are running a custom firmware and it does something different than what my stock does.
GL
edit:/ just read that RFD post from the other thread, and I definitely notice a flicker when in nova's app drawer. It seems to occur only right after I move the tablet and only noticeable at higher backlight settings, if I set it down flat and don't move it, it doesn't do it. Perhaps related to the gyro sensor? Something not isolated fully/properly would be my guess. With the wifi turned on, it also does it along with the activity up/down arrows on the logo... now that I've seen it I wonder if its going to bother me on lower brightness levels now :silly:

joeblowma said:
edit:/ just read that RFD post from the other thread, and I definitely notice a flicker when in nova's app drawer. It seems to occur only right after I move the tablet and only noticeable at higher backlight settings, if I set it down flat and don't move it, it doesn't do it. Perhaps related to the gyro sensor? Something not isolated fully/properly would be my guess. With the wifi turned on, it also does it along with the activity up/down arrows on the logo... now that I've seen it I wonder if its going to bother me on lower brightness levels now :silly:
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Thanks for checking. I tried the airplane mode setting, and I swear that fixed it. But then it came back after a few more toggles of data/wifi. Given that you're seeing it too and that others have reported seeing it as well in the RFD thread, I'm thinking it isn't a defect but rather poor design. There's little chance it would be this widespread and only on the exact same color combo for everyone. I think most people just never notice it since you're rarely just looking at a solid or mostly solid grey screen. I wonder if there's a way to disable the gyro on a stock/non-rooted gpad like mine? For me, it does it regardless of brightness level.

I've seen this on different devices too, so it's not just a G Pad X thing. I wanna say I've seen it on my Nexus 5 back in the day, but I've had many devices so it's hard to remember. But yep, noticed it happens on "grey" colors. It's much less noticeable with the brightness lowered. Never really bothered me so never posted about it.

emilyrugburn said:
I've seen this on different devices too, so it's not just a G Pad X thing. I wanna say I've seen it on my Nexus 5 back in the day, but I've had many devices so it's hard to remember. But yep, noticed it happens on "grey" colors. It's much less noticeable with the brightness lowered. Never really bothered me so never posted about it.
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My guess is it's the led pulse width modulation. It affects some screens more than others, but is an issue with led implementation on lcd screens in general. I'm leaning towards keeping the tablet as I'm 99% convinced that another unit would exhibit the exact same behavior. Glad to hear it isn't a defect, but sad that they did not manufacturer a better screen.

Jottle said:
My guess is it's the led pulse width modulation. It affects some screens more than others, but is an issue with led implementation on lcd screens in general. I'm leaning towards keeping the tablet as I'm 99% convinced that another unit would exhibit the exact same behavior. Glad to hear it isn't a defect, but sad that they did not manufacturer a better screen.
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I don't want to clutter this thread any further, but I'm going into a B&M t-mo store to see if I can test this out on a display device to confirm how widespread this issue is.

Quick update on the flicker issue. It's a problem with all the units, or perhaps just poor design. I did a warranty exchange, and the replacement unit had the exact same issue. Oh well. Just time wasted I guess.

I have the same exact issue with the one i got my mom. Fortunately it doesn't bother her too much but it definitely seems to be a design flaw as we also returned it with the return unit having the same issue

Welcome to the world of flicker.
What you are seeing is very common and an unfortunate side effect of cheap reference designs and a don't care attitude.
There are many new standards for flicker but I doubt they'll be implemented. Flicker pwm needs to be in the 10khz range to be indistinguishable to constant current drives.

Related

Screen problem: slightly visible moire-effect like pattern

I bought this phone 2 days ago, new, sealed, free from contract, and so far I love everything about it, except for this problem which I have found only today. I guess It was all the first excitement keeping me to notice earlier.
Like the thread's title says, it's like a perfect pattern across the screen, from edge to edge, consisting in perfect parallel 10-degrees-from-horizontal-oblique stripes. They are very very subtle and only visible on light backgrounds and more from looking from the upper part of the screen down.
Do not confuse them with the pixels matrix, whose density, by the way, is great. They are all right, and the effect described above seems to appear on a layer which is on top of those pixels.
To make an almost perfect comparison, this effect looks almost like the striped background from market.android.com (as seen on a computer), but with more subtle greish on white stripes inclined from right to left, and only like 10 degrees oblique from the horizontal. That is what's making me curious, why is that pattern oblique? If it were straight horizontals or verticals I would have confused them with the pixels arrays, and it would have been bearable. But like they are I can't stop but notice this pattern every time and it annoys me a lot! In GMail, Browser etc... all the apps with plain backgrounds...
It wouldn't appear on any close picture I tried to take, and I guess filming for you to see it isn't a good idea either, because you won't notice it. It's only visible with the naked eye, at a distance closer than 30 cm from the screen. It isn't also a problem of my eyes, because my wife is noticing it too.
Thank for any shared thought.
stnel said:
I bought this phone 2 days ago, new, sealed, free from contract, and so far I love everything about it, except for this problem which I have found only today. I guess It was all the first excitement keeping me to notice earlier.
Like the thread's title says, it's like a perfect pattern across the screen, from edge to edge, consisting in perfect parallel 10-degrees-from-horizontal-oblique stripes. They are very very subtle and only visible on light backgrounds and more from looking from the upper part of the screen down.
Do not confuse them with the pixels matrix, whose density, by the way, is great. They are all right, and the effect described above seems to appear on a layer which is on top of those pixels.
To make an almost perfect comparison, this effect looks almost like the striped background from market.android.com (as seen on a computer), but with more subtle greish on white stripes inclined from right to left, and only like 10 degrees oblique from the horizontal. That is what's making me curious, why is that pattern oblique? If it were straight horizontals or verticals I would have confused them with the pixels arrays, and it would have been bearable. But like they are I can't stop but notice this pattern every time and it annoys me a lot! In GMail, Browser etc... all the apps with plain backgrounds...
It wouldn't appear on any close picture I tried to take, and I guess filming for you to see it isn't a good idea either, because you won't notice it. It's only visible with the naked eye, at a distance closer than 30 cm from the screen. It isn't also a problem of my eyes, because my wife is noticing it too.
Thank for any shared thought.
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Much better to send you're mobile to the store were you bought it. because as what i have know the problem is the LCD. that is what they called wire stripe or ribbon.... maybe that is the problem. Try it, there is noting to lose.....
I see that too, only on light (white) backgrounds. I thinks it's normal, you may ask your local Sony Ericsson customer service or a phone shop, but I don't think this is a production fault.
On a dark blackground it is purely invisible.
Try it with and without the Bravia engine enabled.
kirbygonzalo said:
Much better to send you're mobile to the store were you bought it. because as what i have know the problem is the LCD. that is what they called wire stripe or ribbon.... maybe that is the problem. Try it, there is noting to lose.....
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kirbygonzalo, thanks but even googling it I couldn't find anything about wire stripe or ribbon.
sdk16420 said:
I see that too, only on light (white) backgrounds. I thinks it's normal, you may ask your local Sony Ericsson customer service or a phone shop, but I don't think this is a production fault.
On a dark blackground it is purely invisible.
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sdk16420, thanks for sharing this, It is somehow a relief for me to know I'm not alone in this. Yet, I'll wait until next week to see if I can find more explanations, and then maybe I'll return it for a replace. It's especially bad for me, as I waited a lot to receive the silver one (a week or so), and I don't know if I can find another.
LenAsh said:
Try it with and without the Bravia engine enabled.
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It doesn't depend on Bravia Engine, unfortunately. It was also the first thing that came into my mind, tried it several times, even with deactivating and rebooting, but the effect is persistent.
Again, it's only visible on light backgrounds, especially white and large ones (browser, gmail, etc). If you read this, please check yours also find some time to post a reply with the result. I would be very grateful.
Thanks!
I have the blue model but i can barely see that pattern with a screen flashlight (on full white) and i don't find it annoying at all in daily use of the phone.
You can check the screen from a new phone in a shop, to see if it looks like yours ... or you have a eagle eye
PS
check softpedia also
I think I can see what you're talking about on my Red Neo but only if I max the screen brightness and look really closesly (like practically inserting the Neo into my eye). 99.99% of the time I don't notice a thing.
I just followed your description and found the same with my neo, so I think it the LCD design. Not an issue to me indeed.
Does anyone have another phone model (e.g. Samsung, HTC) with a LCD touchscreen? Is it also visible on other phones?
sdk16420 said:
Does anyone have another phone model (e.g. Samsung, HTC) with a LCD touchscreen? Is it also visible on other phones?
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I have a Samsung Galaxy S with SAMOLED, a HTC Desire with S-LCD and an Asus Transformer with IPS LCD, and they all have better screens. The Desire's is the most problem free, whereas the Galaxy S has problems with screen burn-in (or image retention, like some are identifying it, but for me it's still like the old good plasma screen burn-in ), and the Transformer's has light bleeding. But, like I said, when put aside, the Neo's looks the worst.
I don't know if you noticed it already, but it comes with another "feature" that is so annoying: it stays always on auto brightness regardless of the custom level set, maxing that automation on that custom level. It's so annoying, cause it's always too dark for me, and being a "feature" it doesn't have also a switch for that. At least it has for Bravia....
stnel said:
I have a Samsung Galaxy S with SAMOLED, a HTC Desire with S-LCD and an Asus Transformer with IPS LCD, and they all have better screens. The Desire's is the most problem free, whereas the Galaxy S has problems with screen burn-in (or image retention, like some are identifying it, but for me it's still like the old good plasma screen burn-in ), and the Transformer's has light bleeding. But, like I said, when put aside, the Neo's looks the worst.
I don't know if you noticed it already, but it comes with another "feature" that is so annoying: it stays always on auto brightness regardless of the custom level set, maxing that automation on that custom level. It's so annoying, cause it's always too dark for me, and being a "feature" it doesn't have also a switch for that. At least it has for Bravia....
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When I put brightness on 100%, and hold my finger on the light sensor, I don't see the screen getting darker. What does annoy me is that you can't make the brightness less than about 30%. I use widgetsoid for brightness adjustment, and the screen will only become darker than 30% if I hold my finger on top of the sensor. That sucks. I I want to sacve energy, I have to hold my hand there, while using the phone.
I don't see why people need the brightness that high anyways, aside from in some games with small hard to see details I'm perfectly fine with my brightness set at just 30% or even just 20%...heck I can still use the phone when the brightness is completely off though that does get a little hard to see everything.
SCHUMI_4EVER said:
I don't see why people need the brightness that high anyways, aside from in some games with small hard to see details I'm perfectly fine with my brightness set at just 30% or even just 20%...heck I can still use the phone when the brightness is completely off though that does get a little hard to see everything.
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I use it a lot outside, and its sunlight legibility isn't as good as SAMOLEDs or others, but that I knew from reviews before the buy. If it wasn't for the problem in this thread, I wouldn't be so harsh on it.
LE I se new posters here. Do you noticed the problem described in the first post? Does it bother you?

[Q] SGS 2 - low light reveals screen defect?

There are a few threads out there that have touched on this issue but none as far as I can see that deal with it directly.
The problem comes when you display a pure black screen in low light conditions. It shows that the AMOLED screen is actually grey / blotchy / cloudy instead of being pure black. Initially I thought mine had fingerprints or smudge marks on it, until I realised they were behind the screen. I guess I might have got a phone with a screen that was replaced, but the amount of people who have also reported a similar issue leads me to believe that it might be a manufacturing default? The blotches / clouds on the screen dont change, but exhibit a random formation as one would expect from a defect. It is also possible to see a very faint outline of light running along 3 edges of the screen.
Naturally this is a situation that doesnt reveal itself very often. But I as I use my phone a lot at night, especially reading ebooks or watching films, you start to notice it more and more where you have large expanses of empty black screen.
What I would like to know is how many people have got screens that exhibit this behaviour and how many of you have sent them in for service or had them replaced?
Is it a common issue and something that is to be expected from this type of screen?
You can test if yours has this problem using 'Screen Test' (its free) from the market place. It cycles through solid colours and patterns every time you touch the screen.
Just do it in bed with all the lights out P), give your eyes a few seconds to adjust and see what your screen looks like displaying pure black.
I'm very interested in everyone's experiences and any input or information you have.
Thanks everyone in advance!
ps: I came from a ZTE blade (OLED) which has a uniformly dark grey background when displaying pure black. I kinda expect this as it is a budget phone (albeit with a better than budget screen), but I didnt expect the SGS2 to be quite as bad.
Use "screen adjuster" from the market and set contrast to -60
i have never seen this black low light screen defect. but i am asking you people if any of you have noticed that ugly blurry shadows which are perfectly visible with low light, on white backgrounds especially. they look like marks above the actual display and make high quality images look like low resolution.. it is annoying as hell..
I have this. Noticed it one night when my phone was switched off and charging.
Sent from my GT-I9100 using XDA App
I also have this, noticed the first evening i used the phone...you can notice this during the screen wake delay, or when in a call if you cover then uncover the proximity sensor...don't know if it's a defect but sure it bugs me, i know many won't notice it and will say they don't have this...i will add that if u look carefully to the screen dimmed at lowest brightness in a low light (buy not dark) environment, like early morning, you'll see some "interferences" behind the image, also the darker/yellower left half screen is still visible in these conditions
These things shouldn't be there in a 500€ phone
Sent from my GT-I9100 using XDA App
Thanks for the feedback already.
@elmerendeiro: I have also noticed some 'interference' lines on my phone from time to time. I did a bit of research and it seems when your phone's brightness is set around 25 - 30% it picks up interference from either the wifi or 3g radio. Notch the brightness either above or below this level and you wont see it anymore.
I agree with you when you say we shouldn't be having these problems on such an expensive phone.
It bugs me too - if it wasnt for this i'd have to say it would be an amazing phone
Might give the Samsung service center a call and see if its something they're aware of and if they are replacing screens with this problem?

Display not TRUE BLACK ?

Hello,
Im Using Amoled Smartphones since the Galaxy (i7500). They all were always showing at 100% Brightness for Black parts of a picture a true Black like the Display is OFF.
If you put the Brightness to 100% and go to an complete Dark Room and open an Black Picture you see some Gray/Yellow Tint on the Screen. You can compare this good by locking the phone to see the Screen OFF and than unlock it to view the Black Picture again. You should see a huge difference. Hope to hear from your experiences.
I've seen that already on the S1 when abusing it a a nightstand clock.
Best guess I've heard is that the (AMO)LED screen leaks some luminosity to other pixels in the background which is then visible as a very faint glow.
However I rather believe that the AMOLED are not truely off but rather get some leak voltage and thus have a very-very-very faint glow (like one photon per second xD )
That would explain the black spots most people seem to mind on AMOLED when on minimum brightness with a black screen; they are truely off or without insufficient leak voltagage (LED's requie a minimum voltage to work).
AMOLED production is somewhat complicated (very thin layer of silver as a power source and a control-layer) so I wouldn't be surprised if the above is true.
Nothing is perfect, especially not a rather new technology.
What else did you expect from a backlit display.
jbadboy2007 said:
What else did you expect from a backlit display.
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It's not backlit is the point.
Correct me if im wrong here but amoled is, by design, not backlit.
Sent from my LG-P920 using xda premium
Yeah so I was wondering why it does this little/ hard noticeable yellow/gray tint on a dark room...
There is no Backlight... Unfortunely i Sold my Galaxy S2 so I cant compare it.. But im Sure it wasnt like this
I have this on my gsiii and also on the Gnote... I think is due to the pentile screen
I had this on my Fascinate but realized it wasn't a big issue. Definitely more noticeable on my Gnex but it also has more pixels so that could be why you see more light. I wouldn't call it a problem because the majority of the time it's absolutely unnoticeable. Each pixel has so have some sort of voltage to be ready to react to changes. Turning off/on completely each time light is needed might waste battery.
P.S. I'm noob at displays but that's my theory.
Zacisblack said:
I had this on my Fascinate but realized it wasn't a big issue. Definitely more noticeable on my Gnex but it also has more pixels so that could be why you see more light. I wouldn't call it a problem because the majority of the time it's absolutely unnoticeable. Each pixel has so have some sort of voltage to be ready to react to changes. Turning off/on completely each time light is needed might waste battery.
P.S. I'm noob at displays but that's my theory.
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I was curious about this issue as well. It's my understanding that OLEDs do not produce any light in their inactive state.
Regarding your theory, I wonder if it's similar to plasma displays. Even though plasmas are capable of true black (they do not use a backlight) The individual plasma cells have better response times if they aren't fully discharged on blacks. So they have a faint glow that comes from the low power they are using to keep the pixel charged up and ready to go when a color change is needed.
This actually costs a little power though, rather than saving it. So if thats what they are doing, it is for screen quality reasons so that movies and other things look better.
Did some Googling and I couldn't find much information, but there is talk of delivering pre-charge voltage to the OLED pixels to improve response times. So it could be that they are indeed similar to plasma displays in that respect: Capable of true black, but the benefits of not using true black are too good to pass up.
Are you SURE the picture is actually true black? By that i mean pure 100% black in an uncompressed image? If not then you cant expect the phone to display true black. A JPEG of black may not be enough.
My screen it totally off when displaying true black.
I can confirm the screen showing a faint glow on S3 with a true black screen.
Use Firefox with Fullscreen extension (Chrome and the default browser don't seem to have fullscreen mode yet) and go to http://d4f.pf-control.de/black.html
That's rendered on the phone so we can expect it to be the blackest black an app can produce, however in a (very) dark room you'll see a very faint glow coming from the screen and you'll be able to see the black spots (truely black) that people keep complaining about.
The theory about it being a precharge voltage does indeed sound plausible since LED's have a certain reaction time which unfortunately cannot be compensated by e.g. Overdrive as is used in LCD screens.
Note that the S3's "black" is still far better than any LCD.
No mine is still jet black, no light at all.
Go to a COMPLETELY dark room and make sure the screen is actually turned on when on the website (not timed out).
Then take a long-exposure photograph of your phone (still make sure the screen is turned ON!).
I don't have a long exposure camera, but the room is completely dark and my eyes have adjusted, there is no light.
All sgs3 ( as sgs2) screens emit a very week glow on a black pictures ( with the screen on )
Sent from my GT-I9300 using xda premium
It would seem to me that the 'ink spots' many have are not overly dark spots at all, they are what the screen should be. My screen emits no visible light when displaying a true black image, at least nothing my eyes can see, even at the edge of my vision field where light cell are most sensitive. My screen is on maximum brightness.
My screen has no patches, no streaks, no spots, no pink or excessively blue tint. I guess i have a screen thats as near to perfect as they get.
yes there is very faint glow indeed making the screen a bit greyish instead of pitch black
Excuse me if I am being naive but where is real life use would this ever be a negative impact?
jfenton57 said:
Excuse me if I am being naive but where is real life use would this ever be a negative impact?
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no negative impact, but still raises a question "why so?"
jfenton57 said:
Excuse me if I am being naive but where is real life use would this ever be a negative impact?
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I don't think anyone is trying to paint it as an issue that needs to be resolved. It's more of an odd technical mystery rather than a real problem. The blacks are still extremely deep on an AMOLED, just like with Plasma it puts LCD to shame in that department.

What hardware issues are you experiencing?

There seems to be a number of people raising certain hardware issue problems. I don't know about you, however I don't seem to have any issues at all here.
Current Issues
Light Bleed
Back Cover Flex
Warped Back
No issues here!
Vote in the poll!
Would be nice to know which possible batch you got yours from.
Did you order it on launch day or have you ordered it since it's come back into stock?
Which country have you ordered it from?
Have you had to RMA ones before?
I have no issues at all. There is a minor amount of light bleed around the bottom edge (landscape with camera at top)but this is no issue as it only affects the nav bar, and is totally invisible when set to lowest brightness setting where I tend to use the tablet . I love this thing.
If I turn the brightness up full, I have the weeniest bit of light bleed on the bottom right corner but you have to look hard to see it.
Everything else is fine
Possible Touchscreen/Multi-Touch issue?
Still awaiting for others to leave some feedback Only takes about a minute or two to test
Some of these are not a hardware issue but a chassis issue. Hardware is the components inside the tablet.
I ordered on the 13th and no issues to report.
Murmur95 said:
Some of these are not a hardware issue but a chassis issue. Hardware is the components inside the tablet.
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Minor technicality.
Minor light bleed, non factor. Extremely pleased with this tab!
Minor light bleed in lower right like everyone else, which I wouldn't have noticed if not for reading the forums!
My LED is not working, our art last I can't make it work. Doesn't really bother me as in my previous tablet (a BlackBerry playbook) I turned out off anyway.
Sent from my Nexus 10 using XDA Premium HD app
Nothing at all there could possibly be light bleed, but I have not dine a test, I am just using it and in terms if uses, there is nothing noticeable
Murmur95 said:
Some of these are not a hardware issue but a chassis issue. Hardware is the components inside the tablet.
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So far as I'm concerned, hardware is anything physical, so to me the chassis falls under this. Hardware is physical components, software is well, software.
Part of the 2nd batch (restocked 11/20).
Only minor light bleed.
Alright I ordered another one due to some light bleed that is visible on almost all automatic brightness levels. I sure hope I don't get one that's worse. charging cable I got doesn't work either so that also pushed me to RMA it.
Sometimes when holding the Nexus 10 with one hand on either side, I frightening notice the side speakers slightly detach. I only noticed this three times before I promptly adjusted the way I hold it till I get a case with sufficient protection.
Sent from my Nexus 10 using XDA Premium HD app
Light bleed. And not a hardware issue but a lot of freezing....
Sent from my Nexus 10 using Tapatalk HD
I haven't seen anyone else mention this anywhere, but the backlight makes a really annoying high-pitched whine whenever it's turned on, and the pitch/tone changes with brightness. From what I've read it could be a choke coil squealing but I didn't think something like this would have them large enough to make noise.
ChrisK15 said:
I haven't seen anyone else mention this anywhere, but the backlight makes a really annoying high-pitched whine whenever it's turned on, and the pitch/tone changes with brightness. From what I've read it could be a choke coil squealing but I didn't think something like this would have them large enough to make noise.
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I maxed out my brightness and I couldn't hear a thing, however I did notice that my plasma makes a high pitched whine.
Multi touch all good here when using the app that was posted; tried several different touches to be sure.
Light bleed in the bottom right, pretty minor though. Everything else is solid & working though.
As for the back strip flexing, The clips that keep it secured are tiny, so it doesn't surprise me that that is an issue for some... makes me wonder how things will go once the covers that swap out the back strip are released...
Sent from my Nexus 10 using xda premium
Light bleed, but the most annoying one is that the front and back camera both are not working. Doesnt anyone else have this problem?
Pasmaaaan said:
Light bleed, but the most annoying one is that the front and back camera both are not working. Doesnt anyone else have this problem?
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I get this issue sometimes on my Galaxy Nexus when 3rd party camera apps or apps that use the light are in use. The camera on my n10 works okay at least.
I guess I got extremely lucky. Ordered the minute it first become available (Tuesday, delivered Friday) and zero issues.
No reboots, freezes, laggieness, light bleed, back flex, dust, etc..... nothing, everything has been great.
Not usually this lucky....so I am extremely pleased

How could you LG??

What's up everyone, loving this k one but how about that screen bleed though!? Yes I know there is a similar post about this, but I want to make it only about the screen bleed issue and anyone experiencing same? I am about to go get my third exchange in less than ten days
I just checked and the only noticeable bleed I noticed was by the top left of the second screen but it's small. Main screen seems ok, to me at least.
cadcamaro said:
I just checked and the only noticeable bleed I noticed was by the top left of the second screen but it's small. Main screen seems ok, to me at least.
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That's true, and for me it's fairly noticable on the top left, along with under the two front facing cameras there is bleed as well for me. This is my second phone.
Could be like the g2x lol
It's definitely there in the top left corner, but there's no way it would bother me enough to go exchange it.
Same here, if only there was a way to invert the color from BLACK text on White backgroud, to WHITE Text on Black Background. The fade would not be noticeable.
I went through 2 V10s and ended up returning both and going back to my M8. Basically what I noticed was slot of backlight/screenbleed issues when in immersive mode of an app. Like a book reader for example. If the background color is white, up at the top of the screen there would be a gray/black hue leaking through.
Of course once you notice it, you see it in other applications that go into immersive mode. I think there is something happening where the 2 displays meet at the top when immersive mode kicks in.
It's mostly only noticeable when the screen is like 60% brightness or less.
Unfortunately that was a deal breaker for me, even though the rest of the phone was great.
What sucks is that I'm going to have to fight a restocking fee for this problem even though t-mobile store reps saw the problem as well
Sent from my HTC One_M8 using Tapatalk
gustav30 said:
I went through 2 V10s and ended up returning both and going back to my M8. Basically what I noticed was slot of backlight/screenbleed issues when in immersive mode of an app. Like a book reader for example. If the background color is white, up at the top of the screen there would be a gray/black hue leaking through.
Of course once you notice it, you see it in other applications that go into immersive mode. I think there is something happening where the 2 displays meet at the top when immersive mode kicks in.
It's mostly only noticeable when the screen is like 60% brightness or less.
Unfortunately that was a deal breaker for me, even though the rest of the phone was great.
What sucks is that I'm going to have to fight a restocking fee for this problem even though t-mobile store reps saw the problem as well
Sent from my HTC One_M8 using Tapatalk
Click to expand...
Click to collapse
I was thinking in maybe doing the same but getting maybe the HTC m9 or anything other than the Samsungs. Hate them. I will be going today to get my third new exchange since I still have seven more days left. Gets very annoying all this screen bleed issues. This phone is so beast in all other aspects. Camera, sound quality, and love the software but not as much to stock like nexus line.
I have a post here with dead pixels issues, the replacement T-Mo sent me not only had dead pixels as well, but a terrible bleed where the two displays meet. It is only noticeable when you look at the display from an angle, for example phone on the table and you have a light background you see a dark spot there, once I noticed that its driving me crazy. LG quality control is a POS IMO. This phone rocks, but is plagued by stupid QC issues.
There is nothing you can do. All phones will have the "second screen bleed" due to how it's designed.
There are two backlights. First is the normal backlight that lights up the entire display (there is no "second screen" - it's a single LCD panel). Then, there's the secondary backlight - a single white LED on the left edge of the "second screen." This single secondary backlight LED is injecting light through the left edge of the second screen and is not attached to the main backlight diffuser, which is why it lights the screen so unevenly. There are certain times when that secondary LED is on and when it is off. When it is on, it adds extra light near the left edge of the screen, which makes the notifications in that area brighter.
Try this. Turn on the Camera app and observe the buttons that appear on the second screen. Notice that the left-most (or bottom, if you hold it horizontally) button is NOT brighter at all? That's because the second backlight turns off when the camera app is running, and you only see the main screen backlight, which is even. Exit the camera app and you'll see the second backlight turn on and the bleed return. Open the camera app again and you'll see the bleed disappear, as the second backlight turns off.
Do another test. Hold the phone at an angle so the bleed from the second backlight is clearly visible, then go into the settings for the second screen, and turn it off while watching the left-most edge of the second screen - you'll see the "bleed" suddenly disappear, because the secondary backlight turns off (even though the main backlight is on). Turn the second screen back on while watching the left edge, and you'll see the bleed come back as the secondary backlight turns back on.
Yet another way to see it - power off the phone, then power it on while watching the left edge of the second screen. During initial boot, it will look perfectly even, no bleed, because the secondary backlight is off. But half-way through the boot process, the secondary backlight turns on, and you see "bleed."
Now, when the main screen is off, the ONLY thing lighting the second screen is the secondary backlight, so ALL you see is bleed (since the main backlight is off) which looks horrible.
The reason you don't see bleed at all in TWRP is because TWRP doesn't know that there is a second backlight and therefore it doesn't turn it on, since it doesn't know how.
To get rid of the "brighter left side" problem when the main screen is on, all LG has to do is issue a software update that turns off the secondary backlight when the main screen is on - I'm surprised they overlooked this obvious problem.
And here's the kicker - you know why you don't see the second screen bleed on the demo units in stores? Because the Retail Mode app turns the secondary backlight off, just like the camera app.
here's my issue, called again to T/mo and they're sending another RMA..Apart from that am having a defective proximity sensor...will update when the "new" phone arrive
That's not screen bleed. That's where the edge of the lcd panel meets the edge of the bezel around the front facing cameras. It's an unavoidable shadow.
I'm really picky about my phones, especially the screens, but I think you're honestly expecting the impossible. They can't NOT make a shadow there, given the arrangement of the secondary screen backlight and the camera bezel.
If that's your biggest complaint about this phone and the screen, then I think you're being too picky.
Mr. Orange 645 said:
That's not screen bleed. That's where the edge of the lcd panel meets the edge of the bezel around the front facing cameras. It's an unavoidable shadow.
I'm really picky about my phones, especially the screens, but I think you're honestly expecting the impossible. They can't NOT make a shadow there, given the arrangement of the secondary screen backlight and the camera bezel.
If that's your biggest complaint about this phone and the screen, then I think you're being too picky.
Click to expand...
Click to collapse
I know am picky, we all should be with a $600+ smartphone, in the highest end gamma quality control must be precise. Apart from that I already posted a dead pixels thread and this one has dead pixels too...take a magnifying glass crank the brightness to 100% and watch very carefully in a dark, this is my second V10 and a third is on the way
Now dead Pixels are not acceptable. But that shadow will always be there no how many times you exchange it.
Mr. Orange 645 said:
Now dead Pixels are not acceptable. But that shadow will always be there no how many times you exchange it.
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Click to collapse
That shadow was not there on the last phone and its really annoying cause it distorts any solid color that's displayed there, also it's only a "shadow" with light content, it's a bright spot with dark content. It looks worse in real life than it does in pictures
ZiCott said:
Same here, if only there was a way to invert the color from BLACK text on White backgroud, to WHITE Text on Black Background. The fade would not be noticeable.
Click to expand...
Click to collapse
Search for " invert" inside the phones settings [emoji6]
Or go to Accessibility/Vison
It makes the pull down menu dam ulghee althou the rest looks great. [emoji53]
sent with Hugz from my new fully stock, non-rooted VZW LG V10 VS990 which an old faithful still working Rezound helped me to afford to get
H961...nothing for specific 2nd screen inversion
ǀcey said:
Search for " invert" inside the phones settings [emoji6]
Or go to Accessibility/Vison
It makes the pull down menu dam ulghee althou the rest looks great. [emoji53]
sent with Hugz from my new fully stock, non-rooted VZW LG V10 VS990 which an old faithful still working Rezound helped me to afford to get
Click to expand...
Click to collapse
Sorry, I dont see it. I have H961N, and there isnt an option to invert 2nd screen colors on Stock ROM
ZiCott said:
Sorry, I dont see it. I have H961N, and there isnt an option to invert 2nd screen colors on Stock ROM
Click to expand...
Click to collapse
Gross
That means our models r very radically different.
way much more of an extent than I have been realizing.
Or...u have an adware prob or it's hidden
I think when it comes down to basics...each flavor has it's own heart.
Yet..No matter the carrier and especially when it's a basic LG/LGE setting....it shuld b on all.
Forgive my lack of correct wording....
I bet if u can't see it ..the ..invert....setting maybe just hidden
Again...u r stock?
K now i think....
You should Try searching for "invert" with QuickShortcutMaker app https://play.google.com/store/apps/...G6PnXP4eFRw4Tw9vg&sig2=ujB0W4bySmI1c5Qzvof0KA
No I'm not pushing the app...I'm hoping it may enabling u to see the setting.
sent with Hugz from my new fully stock, non-rooted VZW LG V10 VS990 which an old faithful still working Rezound helped me to afford to get
arman3986 said:
That shadow was not there on the last phone and its really annoying cause it distorts any solid color that's displayed there, also it's only a "shadow" with light content, it's a bright spot with dark content. It looks worse in real life than it does in pictures
Click to expand...
Click to collapse
You need to take use of their 3 RMA in 90 day policy and switch out from the V10 than.
gustav30 said:
I went through 2 V10s and ended up returning both and going back to my M8. Basically what I noticed was slot of backlight/screenbleed issues when in immersive mode of an app. Like a book reader for example. If the background color is white, up at the top of the screen there would be a gray/black hue leaking through.
Of course once you notice it, you see it in other applications that go into immersive mode. I think there is something happening where the 2 displays meet at the top when immersive mode kicks in.
It's mostly only noticeable when the screen is like 60% brightness or less.
Unfortunately that was a deal breaker for me, even though the rest of the phone was great.
What sucks is that I'm going to have to fight a restocking fee for this problem even though t-mobile store reps saw the problem as well
Sent from my HTC One_M8 using Tapatalk
Click to expand...
Click to collapse
I noticed the same thing on mine. I hope they will fix it with a software update. I've noticed that it doesn't seem to happen as long as the second screen is active.

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