Got my Kindle HDX 8.9 yesterday and love this thing. The only issue I am having, if it's even an issue at all, is a very subtle backlight flickering after I've moved between screens. Sometimes while watching a video, I notice it flickering as well. It almost seems like an auto-brightness is making very small changes to the display, although I have auto-brightness turned off.
I don't doubt it's a bit OCD on my part, so I wanted to see if anyone else had experienced this. I wouldn't say it's a major issue, but it's one of those things that once you notice, it's hard not to see it.
I have noticed something similar but not really a flicker, it is is a screen redraw that shifts the gradient of some screens slightly. Really noticeable in LCD-test (AMOLED Read) from 1mobile store.
phage80 said:
I have noticed something similar but not really a flicker, it is is a screen redraw that shifts the gradient of some screens slightly. Really noticeable in LCD-test (AMOLED Read) from 1mobile store.
Click to expand...
Click to collapse
Hm, putting that way, I'd say you're right and is probably a better explanation. So I assume it's just how the screen works, rather than something defective with my device? I guess that makes me feel... a little better. I think.
I'll check out that app. Thanks.
I have not noticed it on plex or mxplayer when watching video, so might be a screen redraw issue with some apps.
phage80 said:
I have not noticed it on plex or mxplayer when watching video, so might be a screen redraw issue with some apps.
Click to expand...
Click to collapse
I don't have extensive knowledge of screen redraw issues in relations to apps but I can attest to this. I too notice on some occasions the screen flickering craig mentioned but when it comes to using something like MXplayer, the flicker is non apparent when I am watching anything. So I'm assuming it's just an app thing causing it?
And I'm actually using the 7" HDX where I see what it is you're talking about. Still like my HDX for sure though lol
Seems to happen anywhere for me, even on the home (launcher) screen, in system preferences, etc.
I might stop in to Best Buy today and see if their demo units do the same thing.
I get the same screen flicker on the home screens and in apps. . It's like the auto brightness setting can't make up its mind
vincey2kr1 said:
I get the same screen flicker on the home screens and in apps. . It's like the auto brightness setting can't make up its mind
Click to expand...
Click to collapse
Well this is all certainly interesting. In my case, I don't have auto-brightness on, yet it still seems to make every so tiny adjustments. Starting to think it's just the way it is.
Now I guess it's just a matter of calming my OCD and dealing with it, or returning it. Shame too, because the screen is beautiful otherwise.
Follow up
Just wanted to check and see what everyone on this thread ended up doing in regard to their Kindle HDX devices. Did any of your issues get resolved? Did you end up returning your HDX's and getting something else?
I have a 7" Kindle Fire HDX and I love it. The device is perfect . . . except for the occasional screen flicker. I have gone through FIVE devices (returned my Kindle Fire HDX to Amazon and got sent a new replacement four different times). I noticed this flickering issue on all of them and eventually decided that it must just be how these things are. I personally have not observed a relationship between the flickering and the device getting hot. I believe that it is a screen redraw or auto-contrast issue but I'm not sure if it is software or hardware. If it is software I can live with it until they make a patch. If it's hardware I don't think I will be able to handle it long-term.
Please post back and tell me how you dealt with this issue. Thanks!
Turn off the Automatic Brightness. My 7" was constantly changing the backlight brightness, causing an anoying flickering effect...
skoop99 said:
Turn off the Automatic Brightness. My 7" was constantly changing the backlight brightness, causing an anoying flickering effect...
Click to expand...
Click to collapse
I have had my auto-brightness turned off from the beginning and I still am having this flickering effect. Does your 7" ever flicker now (with the auto-brightness turned off)?
No, not at all...
Sent from my KFTHWA using Tapatalk
Thanks
skoop99 said:
No, not at all...
Sent from my KFTHWA using Tapatalk
Click to expand...
Click to collapse
Thanks for the response, I am awaiting my FIFTH replacement in the mail. Wish me luck. . . .
Pigbutt McGee said:
Thanks for the response, I am awaiting my FIFTH replacement in the mail. Wish me luck. . . .
Click to expand...
Click to collapse
Oh no. I really don´t think this is a hardware issue.
Opinion
Freshman206 said:
Oh no. I really don´t think this is a hardware issue.
Click to expand...
Click to collapse
So what do you think is going on? Is everyone experiencing this?
Pigbutt McGee said:
So what do you think is going on? Is everyone experiencing this?
Click to expand...
Click to collapse
Just google ... There are tons of reports. Same problem here, too.
Similar / identical problems can be seen on a few other devices like the Xperia Mini.
Normally sooner or later there is a fix - for a rooted device.
I have noticed the same thing on both of my Kindle Fire HDX 7" models (one was an AT&T LTE model, the current one is a Verizon LTE model). For those who don't see it: turn the auto-brightness adjustment off, then go to a web page in Silk and put it into reading mode, and then start scrolling. It doesn't always flicker, it seems to start up after I've been reading for a few minutes, and then it keeps doing it every second or third time I scroll. It seems to happen all the time after that until I give the device a while to cool down. And just to clarify, it doesn't JUST happen in reading mode on Silk, but that's where it's most noticeable for some reason, where the background is white and the text is black and the scrolling is variable and repeated. The degree of flicker varies at random, it seems, from barely-noticeable to almost-completely-dark-and-back-to-full-brightness, but they're all quite annoying. They're also happening very quickly; the time from start-to-end for each flicker is perhaps 200-400 milliseconds.
Try this page for a good "Reading View" example (obviously, you have to put it in Reading View once the page finishes loading): Worm - Agitation 3.11
I assumed my backlight hardware had a problem, but then I saw all the reports of this, so maybe it's a fundamental design flaw rather than a hardware defect. The "Learn More" link under the "We Want You To Know" header on the Kindle Fire HDX 7" page describes the screen lighting technology (in the context of explaining why the faint blue tint that you can see around the edges sometimes--like in Reading View with a solid white background, for instance--are normal for the display) by saying:
To achieve the perfect color accuracy on Kindle Fire HDX 7" at the lowest possible battery consumption and device weight, we used blue, not white, LEDs. Blue LEDs allow for a much more accurate and rich representation of color and result in an up to 20% improvement in power efficiency.
As a result of using these blue LEDs, you may notice a very narrow, faint blue tint around the edge of the device when looking at items with a white background, such as books or web pages. All displays have some level of light emission around the edges, and the light on the Kindle Fire HDX 7" is blue due to the technology used to render perfect color accuracy.
Click to expand...
Click to collapse
So maybe the color-accurate, low-power blue LED lighting is also responsible somehow?
Pigbutt McGee said:
Just wanted to check and see what everyone on this thread ended up doing in regard to their Kindle HDX devices. Did any of your issues get resolved? Did you end up returning your HDX's and getting something else?
Please post back and tell me how you dealt with this issue. Thanks!
Click to expand...
Click to collapse
Sorry I didn't reply sooner, but I sent my Kindle back to Amazon a few days after creating this thread and really haven't thought about it since.
The final straw for me was going into Best Buy and using some of the demo units they had out (both 7" and 10" screens) and all of them had the same flickering effect. Decided it was just the way it is on the Kindle and the display they are using and ended up getting a different tablet.
Wish I had something further to add. Auto brightness was definitely not the cause as I had it turned off.
Thanks
craighwk said:
Sorry I didn't reply sooner, but I sent my Kindle back to Amazon a few days after creating this thread and really haven't thought about it since.
The final straw for me was going into Best Buy and using some of the demo units they had out (both 7" and 10" screens) and all of them had the same flickering effect. Decided it was just the way it is on the Kindle and the display they are using and ended up getting a different tablet.
Wish I had something further to add. Auto brightness was definitely not the cause as I had it turned off.
Click to expand...
Click to collapse
Thanks to everyone responding to my post. Can you tell me what tablet you ended up getting instead (and if you are happy with it)?
Pigbutt McGee said:
Thanks to everyone responding to my post. Can you tell me what tablet you ended up getting instead (and if you are happy with it)?
Click to expand...
Click to collapse
I got an non-Android tablet and I'll leave it at that.
Related
hello community,
does anyone beside me notice the screen going blurry while scrolling? best seen at websites with white background and dark letters. it really gives me headaches.
also noticeable while on websites is, that it's not only blurry but also graphics get pixelated everytime I scroll and resharp everytime when scrolling stops.
is this something special about the samoled+? bad refreshrate? maybe fixable? I'm using the phone rooted with normal ke2 firmware and kernel.
thx for your opinions.
I've gone through 4 (FOUR) Samsung Galaxy S2's with replacements due to various issues (overheating, restarting, corrupted screen) And on ALL of them, they blur with fast movement on the screen, especially noticeable, as you said, when it's dark text against a white background. This is purely becuause of the slow response time on the screen. It's a hardware issue, nothing you can do it about it.
Also graphics get pixellated when scrolling as the android OS lowers the quality of graphics while scrolling to make scrolling smoother.
These aren't really problems. Everyone is experiencing the same things as you and I. If anyone says otherwise it's purely because they can't notice it due to bad eyes or whatever but I assure you, it's perfectly normal.
thx for your quick response.
I feared that it's disappointing for such an expensive device. to me, it's kinda like looking at a bade configured screen or something like that.
so no weapon against a low response time, but graphics getting pixelated on a dual-core-monster ... i can go with that on weaker devices, but on this phone ... do you think it's worth asking if somebody knows how to disable that android "feature"?
and let me guess that other phone-screens (like LG optimus speed, which would be the nearest to an alternative) have that blurry problem too ... ?
thx again and feeling sorry for your 4 phones. but you still stick with samsung!
Noticed it too... However it is better here than on the incredible s I had for a couple of days.
With the graphical issue you mean the pictures getting bigger pixels when touching the screen huh?
Are you also having alot of these chess-like patterns while scrolling? Like on the iphone. Is this the browser that does it?
Yeah I was disappointed when I noticed the slow response time myself, especially considering this is a top end device.
I can't say if other comparable devices would have the slow response/blurry screen aswell as manufacturers always exaggerate the specs of screens to 'best case scenario' results, which is completely unrealistic. For example, Samsung states that the screen on the Galaxy S2 has a response time of 0.001ms, which if true, there would be absolutely no hint of blurring at all, however, as I said, they'd of measured it in a best case scenario, they were most likely giving the response time for GTG (or grey to grey, the time it takes for a pixel to turn from grey, to white then back to grey) and with the brightness set to max, I'd imagine 0.001ms wouldn't be far off the true result. However, they should really test BTB, or black to black, which is the time it takes for a pixel to turn from black, to white to black again, and this is the figure that Samsung did not quote, as it's a lot slower than 0.001ms (hence why black text on a white background shows noticeable amounts of blurring). But by my testing, I'd put the screen realistically, closer to 6ms.
And about the graphics turning to lower quality when scrolling, technically yes, this could be 'fixed' as its a software issue.
And yeah I'm sticking with Samsung, after I went through all those replacements, I finally got a decent one that has no issues (touch wood).
correct, as soon as the screen notices your finger it pixels the graphics ... argh! someone should disable that. it's 2011 and powerful enough!
and yes, chess patterns here too. even on less complex sites. never noticed that before in any preview-videos though. so again
r_a_c said:
Noticed it too... However it is better here than on the incredible s I had for a couple of days.
With the graphical issue you mean the pictures getting bigger pixels when touching the screen huh?
Are you also having alot of these chess-like patterns while scrolling? Like on the iphone. Is this the browser that does it?
Click to expand...
Click to collapse
thx for that explanation. for the pixel-thing I'll try to ask the developers here. at least it's android, so most things could possibly be done
drm111 said:
Yeah I was disappointed when I noticed the slow response time myself, especially considering this is a top end device.
.....
Click to expand...
Click to collapse
I'm super annoyed with the support I have received from B&N. I purchased both Kindle Fire and the Nook Tablet. I wanted to use it just as carry around portfolio. The color cast issue on the Nook Tablet was so yellow. Everything I watched or put on the tablet had a slight yellow cast. So I went to the store and showed them they said it wasn't a issue there. Probably cause the lighting in the B&N stores is terrible to begin with. Regardless they let me swap out the tablet. Came home same issue.
I'm not noticing that on mine. Side note: Who's the girl? Lol.
Sent from my Nook Tablet using Tapatalk
beatlesfan01 said:
I'm not noticing that on mine. Side note: Who's the girl? Lol.
Sent from my Nook Tablet using Tapatalk
Click to expand...
Click to collapse
No one ever discussed in any review the color comparison that is between the two tablets. The screen is a lot sharper on the Nook Tablet with less glare. The kindle fire has a slight blue tint with a more muddier contrast. Watching two movies side by side same movie the Nook tablet you can see more of the fine detail in the video compared to the Kindle Fire.
-----
Side note. Ex GF I shoot glamour photography luskphoto.com
As a graphic designer a portable portfolio is part of the reason i got the Nook Tablet as well. If im not mistaken the nook and the ipad use the same type of display, so i dont think you are going to get a much better screen any where else. You are probably only noticing the yellow cast because you are looking at the blueish KF right next to it.
----Edit-------
Personaly I think the nook screen looks ritcher next to the KF.
Could you please post the original image of the woman?
On the posted thumbnails, the skin tone is better on the Nook - and a whole lot less glare.
I noticed this too on my NT. Compared to my GT10 it's much warmer color.
Here is the original
Yep, the Nook Tablet has a very warm color balance. Noticed it right away. Compared to anything else - even the Nook Color - it's very noticeable. I'm a photographer and was also planning to use this for images so if it can't be adjusted, it's probably going back. Except for this flaw, the screen is really outstanding.
tariqgibran said:
Yep, the Nook Tablet has a very warm color balance. Noticed it right away. Compared to anything else - even the Nook Color - it's very noticeable. I'm a photographer and was also planning to use this for images so if it can't be adjusted, it's probably going back. Except for this flaw, the screen is really outstanding.
Click to expand...
Click to collapse
Shows how much I know about screens lol. Sorry OP
Sent from my Nook Tablet using Tapatalk
SenateDC said:
No one ever discussed in any review the color comparison that is between the two tablets. The screen is a lot sharper on the Nook Tablet with less glare. The kindle fire has a slight blue tint with a more muddier contrast. Watching two movies side by side same movie the Nook tablet you can see more of the fine detail in the video compared to the Kindle Fire.
-----
Side note. Ex GF I shoot glamour photography luskphoto.com
Click to expand...
Click to collapse
I envy your job.
The NT looks like it has a more natural saturation, the KF looks washed-out.
reverenddak said:
The NT looks like it has a more natural saturation, the KF looks washed-out.
Click to expand...
Click to collapse
They are both turned up to the same brightness. The contrast might be a little more dark in the KF. The NT is actually the same saturation just a whole different white balance. The laminated screen does stop the glare which looking in a dark room at both tablets its not as noticeable. I have the GSII and the saturation is way off but still a great device.
IF the Nook Tablet gets rooted, there is an Android color calibration app (root is required for this unfortunately as a separate system zip must be flashed in recovery beyond just the app) which can likely be used to tweak the WB. I used it on the original Nexus One and others have used it on more recent Samsungs which have root. Here is the thread:
http://forum.xda-developers.com/showthread.php?t=745248
tariqgibran said:
IF the Nook Tablet gets rooted, there is an Android color calibration app (root is required for this unfortunately as a separate system zip must be flashed in recovery beyond just the app) which can likely be used to tweak the WB. I used it on the original Nexus One and others have used it on more recent Samsungs which have root. Here is the thread:
http://forum.xda-developers.com/showthread.php?t=745248
Click to expand...
Click to collapse
It is rooted:
http://forum.xda-developers.com/showthread.php?t=1354487
But not unlocked.
pharpe said:
It is rooted:
http://forum.xda-developers.com/showthread.php?t=1354487
Click to expand...
Click to collapse
The bootloader is still locked so I believe that means you can't load another rom or boot into a recovery program. You need to start up in a recovery program to install part of the calibration software into the system by flashing there before the apk is loaded. So, I think we need the bootloader unlocked to do all this which we are still awaiting.
I think you may have a real issue. I'm getting ready to return my second unit due to over-saturated screen colors. I wouldn't have noticed that they were off if it weren't for the fact that I had another Nook that looked so much better. I've also seen the screen revert to normal for a session, but returns to poor quality when shut off and turned back on.
I've been using the welcome to Nook video as my standard. She should not look like she just had a bad bronzing job (almost orange). If she does, you may have an issue.
I've also noticed some very faint horizontal artifacting. Like a bad connection somewhere.
ibgap said:
I think you may have a real issue. I'm getting ready to return my second unit due to over-saturated screen colors. I wouldn't have noticed that they were off if it weren't for the fact that I had another Nook that looked so much better. I've also seen the screen revert to normal for a session, but returns to poor quality when shut off and turned back on.
I've been using the welcome to Nook video as my standard. She should not look like she just had a bad bronzing job (almost orange). If she does, you may have an issue.
I've also noticed some very faint horizontal artifacting. Like a bad connection somewhere.
Click to expand...
Click to collapse
What I'm seeing on mine is just a warm color balance, not over-saturated color, lines or anything else. A quick way to see this is to view a black and white image on the Nook Tablet and compare that with another screen, preferably a calibrated one. On the Nook Tablet, the black and white image will look brown to sepia toned versus neutral gray tones.
While using my Tablet throughout the last month, one thing has really been bugging me. The screen seems to be very yellow. Rather than showing white screens as white, they're off-white, greys look a bit darker and greener than they should. The color temperature of the screen is very warm, and it bugs me. Anyone else experience this? Or do I just have a bad screen?
Better question, does anyone know of a fix for this? I'm hoping it's not a hardware problem, but a software one.
Try taking a screenshot ("n" + volume down) of this and let us look at it. I'm guessing if its yellow to us as well, its s software issue. If not, its likely a hardware issue.
Judging by your screen temp, early guess its a hardware problem, but lets see what the screencap shows.
Sent from my Nook Tablet using (((sonicboom)))
There is app called Screen Adjuster that you can grab from the market. It will allow you to change the color of the screen. I use it for night reading tobreduce the blue.
Just remember to disable it when installing apps. Otherwise the install button will be disabled.
Alright, so I grabbed a screenshot and sent it to my Droid X, which has a totally neutral color warmth, and the shot looked perfect. That's a little depressing, but still, something tells me that it has to do with the stock B&N, cause I know Google did something like this with the Nexus S for "enhanced contrast" or something like that.
I know this is probably wishful thinking, but I'd still like to believe there's a way to fix this.
Also, I tried Screen Adjuster, but it doesn't seem to fix the problem. It seems to just put a filter over the screen.
There was a thread about the color temprature early on in the life of this forum. The OP is a professional photographer and was bothered by the color balance of the NT: http://forum.xda-developers.com/showthread.php?t=1354639&highlight=warm .
conundrum768 said:
There was a thread about the color temprature early on in the life of this forum. The OP is a professional photographer and was bothered by the color balance of the NT: http://forum.xda-developers.com/showthread.php?t=1354639&highlight=warm .
Click to expand...
Click to collapse
Touche. I did try the fix listed in there, but it didn't work (for a number of reasons). The problem has essentially been ignored since then, so I'm assuming either it doesn't bother that many people, or I have a defective unit. That's why I'm asking if anyone else notices it.
Though now this thread does seem redundant..
Seems the NT is a bit more yellow than standard.
http://www.displaymate.com/IPS_Tablet_ShootOut_1.htm
The Nook Tablet also has a very good factory display calibration. Its gray-scale is actually more accurate than most living room HDTVs. The White Point at 6,016K degrees is somewhat more yellowish than the 6,500K standard – that was most likely done in order to increase the screen’s maximum brightness, power efficiency, and battery run-time.
Click to expand...
Click to collapse
Hi all, How are you?
I have a Nexus 9 wifi 32GB "volantis" running stock Android 5.0.1 (LRX22C).
Its display shows a white border/blurry around the device edge on black screens ( or when there is a black area close to the device display edges ), Is this behavior normal?
I appreciate any hlp you can give me,
Roger
Welcome.... Just search for light bleed and you got enough to read ?
Sent from my Nexus 5 using XDA Free mobile app
Hi mrorange2108,
Thanks a lot for helping.
It looks like that It is indeed backlight bleeding
My screen looks like this one:
http://forums.androidcentral.com/google-nexus-9-tablet/457830-example-light-bleed-nexus-9-a.html
Please, Is there any work around for this issue?
I have read lots of users reports saying that they had requested for a RMA, and They received another Nexus 9 with the same issue.
So, It looks like that It is useless to request a new one, as It will probably have the same problem.
I appreciate any help you can give me,
Roger
RogerSilva said:
Hi mrorange2108,
Thanks a lot for helping.
It looks like that It is indeed backlight bleeding
My screen looks like this one:
http://forums.androidcentral.com/google-nexus-9-tablet/457830-example-light-bleed-nexus-9-a.html
Please, Is there any work around for this issue?
I have read lots of users reports saying that they had requested for a RMA, and They received another Nexus 9 with the same issue.
So, It looks like that It is useless to request a new one, as It will probably have the same problem.
I appreciate any help you can give me,
Roger
Click to expand...
Click to collapse
It's a flaw in the manufacturing process. Basically a hardware flaw, so you cannot fix it, only HTC can replace the parts or replace the whole device. If it really bothers you I suggest using low brightness, since the bleed will appear worse as you increase it.
Also the problem isn't universal. Mine has little bleed, and others can have even cleaner screens depending on their revision code.
Ace42 said:
It's a flaw in the manufacturing process. Basically a hardware flaw, so you cannot fix it, only HTC can replace the parts or replace the whole device. If it really bothers you I suggest using low brightness, since the bleed will appear worse as you increase it.
Also the problem isn't universal. Mine has little bleed, and others can have even cleaner screens depending on their revision code.
Click to expand...
Click to collapse
Ace42, How are you?
thanks for helping.
I have searched about screen bleeding issue, and It looks like that all IPS screen have this problem, is that correct?
If it is something related to IPS screens, thus It does not help to request a RMA, as the new device is going to present the same issue , right ?
It looks like that all Nexus 9 are affected with this problem because It relies on IPS screens, some of them with major degree of screen bleeding, and others less affected - but still with bleeding issue.
I appreciate any help you can give me,
Roger
RogerSilva said:
Ace42, How are you?
thanks for helping.
I have searched about screen bleeding issue, and It looks like that all IPS screen have this problem, is that correct?
If it is something related to IPS screens, thus It does not help to request a RMA, as the new device is going to present the same issue , right ?
It looks like that all Nexus 9 are affected with this problem because It relies on IPS screens, some of them with major degree of screen bleeding, and others less affected - but still with bleeding issue.
I appreciate any help you can give me,
Roger
Click to expand...
Click to collapse
You will most likely get another N9 with this issue, but maybe you could get lucky and find one with minimal bleeding if you're okay with RMA. The screen in the N9 might have poor quality control just like some models have bad buttons+pushy rear covers+uneven volume rocker.
And I think it's safe to associate bleeding with IPS & (low quality) TN tech just like OLED tends to show the mura effect.
If you don't want to play the game of getting lucky I suggest waiting for the Galaxy Tab S2, next Nexus, or even getting an iPad if you already use their ecosystem.
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Ace42 said:
You will most likely get another N9 with this issue, but maybe you could get lucky and find one with minimal bleeding if you're okay with RMA. The screen in the N9 might have poor quality control just like some models have bad buttons+pushy rear covers+uneven volume rocker.
And I think it's safe to associate bleeding with IPS & (low quality) TN tech just like OLED tends to show the mura effect.
If you don't want to play the game of getting lucky I suggest waiting for the Galaxy Tab S2, next Nexus, or even getting an iPad if you already use their ecosystem.
Powered By "Yeeart!"
Click to expand...
Click to collapse
Hi Ace42, thanks for helping again.
I understood that all IPS screens have bleeding screen issue, right?
Does bleeding screen issue indicates some kind of another future screen issue?
For instance, If my device has bleeding screen issue, Its screen is going to fail after 3 moths of use?
or Other problem might rise if my device has bleeding screen issue?
I appreciate any help you can give,
Roger
RogerSilva said:
Hi Ace42, thanks for helping again.
I understood that all IPS screens have bleeding screen issue, right?
Does bleeding screen issue indicates some kind of another future screen issue?
For instance, If my device has bleeding screen issue, Its screen is going to fail after 3 moths of use?
or Other problem might rise if my device has bleeding screen issue?
I appreciate any help you can give,
Roger
Click to expand...
Click to collapse
No, it doesn't indicate other issues. Light bleeding has been around forever & even TVs + monitors can still experience it to different degrees. I wouldn't worry too much about it because of its commonness. I'm not saying screens can't randomly fall, but if it develops dead zone, yellowing, etc it will not be due to the light bleed.
HTC just has poor QC, it's the job of their employees to evaluate the performance of parts. Despite being an expensive device the quality isn't equal to Apple's.
RogerSilva said:
Hi all, How are you?
I have a Nexus 9 wifi 32GB "volantis" running stock Android 5.0.1 (LRX22C).
Its display shows a white border/blurry around the device edge on black screens ( or when there is a black area close to the device display edges ), Is this behavior normal?
I appreciate any hlp you can give me,
Roger
Click to expand...
Click to collapse
Contrary to all the crap you will read about "light bleed", it is neither a defect, nor a flaw. It is a CHARACTERISTIC of ALL backlit LCD displays. The reason is has recently become a "defect" in some people's minds, is that there are some display technologies now that do not use a backlight at all, such as the common AMOLED... which has its own set of flaws, such as requiring a much greater resolution in order to yield a similar "look" as a backlit LCD (the higher number of pixels means that you need a stronger GPU), and being extremely poor at accurately reproducing colors.... BUT, no backlight = no light AT ALL from areas that aren't displaying pixels.
Hi all,
thanks a lot for helping.
I understood that black light bleed is a issue in all IPS screens, so if I request a new nexus 9 with HTC's RMA, thus it is going to have the same issue.
Lesion learned: I am going to avoid IPS screens for my next devices.
Thanks a lot,
Roger
RogerSilva said:
Hi all,
thanks a lot for helping.
I understood that black light bleed is a issue in all IPS screens, so if I request a new nexus 9 with HTC's RMA, thus it is going to have the same issue.
Lesion learned: I am going to avoid IPS screens for my next devices.
Thanks a lot,
Roger
Click to expand...
Click to collapse
IPS still a good technology, that's why LG banks on it unlike Sammy. The bleeding can be unnoticeable or severe. That's why quality control is so important.
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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.