iPhone 12 OLED Screen Issue

I did exactly the same thing (issues with flickering text on dark background)

I've returned the 12 Pro Max and now own a normal iPhone 11 which cost £629 from Amazon.co.uk and is more or less is equal to iPhone 12 and 12 Pro (sensor size).

iPhone 11 also has great stabilization at 4K 60fps on all lens including selfie.

Hard to believe Samsung provided so many faulty panels. If there is a faulty sensor that causes the issue , I am not paying $1200 for a phone that needs work. Once you open a phone will never be the same.

Apple will prob deflect this until the iPhone 13 comes out and offer a recall for affected devices (i.e.. iPhone 11 display recall)

Apple know that their target audience are not tech savvy and prob wouldn't even notice it to be a problem

Agreed.

Its defo has to be something to do with their PWM sensor.

On a Xiaomi phone I toggled between PWM and DC Dimming and noticed a big difference in terms of flickering on a black screen. DC Dimming is the solution but at a sacrifice to some image quality

Actually the gamma values are the best of any smartphone tested almost 2.2 from 0 to 100 which is probably only reason people are even noticing anything since most other phones crush detail near black so called black crush!

  iPhone 12 Pro Max Image Contrast and Intensity Scales   https://www.displaymate.com/Gamma_58P.html

I also posted pics from my older LG phone in previous post showing how it failed to even show few black squares above black in my own testing. Personally I prefer the extra detail in shadows that are supposed to be there than not seeing anything at all like other reviews also confirm iPhone 12 better at showing detail in shadows.

"The OnePlus 8 Pro and Samsung Galaxy Note20 Ultra 5G (Exynos) did not render dark detail very well, as seen in this photo illustration from a video of glass blowing." https://www.dxomark.com/apple-iphone-12-pro-max-display-review-bigger-and-still-near-the-top/

This green glow only seen on pure black background AFAICT should be fixable by Apple since it probably just being caused by how they handle the green pixels at low power or near 0% black as someone already stated.

The flickering caused by PWM and weird rainbow effects I just noticed today caused by non-RGB pixel layout used on phones is probably main reasons I"m gonna return it. Pretty sure it's already been giving me headaches looking at the screen to long with the strange flickering! No fix for the RGB pixel artifacts issues since it's due to the pentapixel layout all AMOLED phones use nowadays to save money and power. Like the green tint near blacks not supposed to be noticeable 99% of the time I"m guessing it's worth cost savings though to go with non-RGB pixel layout on OLED phones anymore.

Basically Apple needs to tweak the subpixel anti-aliasing algorithms via software on their iPhones to fix the issue or make it less noticeable to majority of people anyways.

Apple is using subpixel anti-aliasing to make the PenTile layout look as good as possible. Subpixel layouts are specifically designed to work with proprietary algorithms for subpixel rendering embedded in the display driver.

https://www.idownloadblog.com/2017/11/02/iphone-x-oled-pixel-layout/

IPS glow on IPS iphone actually more noticeable and annoying near black as you can see in pic I took of my IPS iphone on left compared to old LG OLED and new iPhone 12 phones!

https://postimg.cc/4Ys2CPBp

Guys the flickering we are seeing/talking about here is not and has nothing to do with PWM.

The pixels are being kept active at low brightness to eliminate the smear effect cause by the delay turning them back on. At mid brightness, they activate only when there is motion on the screen. You can see this if you, for example, go into the dark mode notes app in a pitch black room at around 30% brightness. You'll see that every time you type on the keyboard, the whole screen "lights up" for about half a second then goes back to true black. Believe it or not this is actually a useful feature for things like gaming and watching HDR video at low brightness when the smear on fast moving black objects or pans across black areas in backgrounds would be far more noticeable and more detrimental to the experience than slightly raised blacks.

The problem is that whatever software is controlling this "feature" can't recognize when doing this is or isn't a good idea. Playing a racing game? Good. Reading? Bad. It also can't differentiate when PARTS of the screen move but others don't. ie: the sidebars of video.

The flashing in video is happening because the fact that a video is playing is registering as something moving on screen, but since every frame is pure black, it keeps trying to light up between frames and then turn back off for black, then light up again.

The OLED panels themselves are not faulty. If they can display true black at all (which they definately can. Restart your phone and you'll see true black for the first few seconds regardless of brightness) then the problem isn't the panel, it's the display controller. The fact that some people don't have the issue is probably related to different manufacturers of the display controller, not different screen manufacturers. We already know that Apple had issues sourcing display controllers this year, which is why the pro phones don't have adaptive refresh rates. It wouldn't be hard to imagine said controllers didn't get the best QA and testing.

Whether or not apple is able to OTA update the display controller firmware, or if it's hard-coded and would need to be physically replaced, is yet to be seen.

There are two possibilities. Either Software or Hardware. In Hardware, it may be a batch of OLED defective screen was installed in that Batch Production of iPhones. They can trace it by production number to isolate the case to compare with another batch that doesn't have the same symptoms.

On the software side, maybe it is a bug that the developer missed a syntax or wrong formula. This can be isolated or can be fixed by getting a sample with the same problem. Then rewrite a code that can solve that issue and it will be out as a "software update" with another build of codes.

I can recall that just before iPhone 12 went in to manufacturing they had supplies issues of a display controller that provides 120Hz refresh rate.

At the very llast minute they decided to revert back to 60hz.

This just seems to have the makings of a rushed product launch.

I now call the iPhone 12 (The Churner Edition)

Just slap together previous parts ordered 1/2.55” sensors and produce a phone 😂

Sending Second time my phone to Apple repair

My apple support told be he will tried his best to exchange me the phone, first he tried to contact Apple Frace but got rejected.... secondly he convinced me to resend the phone to apple repair center at Prague and, but nope... Message from repair center - SAME AS FIRST TIME - SORRY We not able to proceed the repair request ! great! I think my apple support was tried his best i believe.

Talk to again just know to a senior Apple Support ! He told me they are aware and they cannot do anything but just ask me to wait until APPLE decided on the solution plan (either replacement or free fixing the screen whatever), but no one know when......

*i could not return my phone because I am the pre-order units so not under the holiday policy.

so I asked him am i have to stay with this issue until like after a year apple come out with solution hahaha he was silent ... and schedule me the 10th or what so ever call again.

I think that's it i am giving up to apple.

Try to hypnosis myself the screen is perfect, the screen is pretty, the screen is fabulous. Story will be ended here.

Okay I definitely had the problem at first, this is my 4th iPhone and I had the problem in the beginning but it looks like the problem is getting resolved. I am on 14.4 beta 1, I had flickering yesterday but today I have no flickering in the videos and the black wallpapers that showed the glow yesterday doesn’t have them today. It looks like the software is learning??? Don’t know what’s going on here. I got my iPhone yesterday. I will keep checking in the following days and report again but for now I am happy that at least true blacks are showing on all brightness levels.

No the problem does exist, at least I don’t have flickering anymore. But the blacks glow sometimes and then when they disappear they don’t appear anymore, just randomly. At this point after exchanging my iPhone 4 times I would even settle for this. I don’t know if the software is learning or what is going on...so I don’t know how to explain this phenomenon.

I want to ask

if you downloaded a dark grey background how uniform the display is ?

also is there a green tint or cast(not on black background on grey or dark colors in general) when you lower the brightness to minimum ?!

Great, Apple deleting my post.

Well i have to say ... well done. I think i done with them. As in the call he repeated apple will not replace or exchange the device at this moment. It was not a pleasure experience just now (the mood).

So stay happy and pray for some good solution is coming next few weeks or months....

Cheers.

Yes I saw that xD

however I read every bit of it in the email 😃😃😃

You will not be forgotten 😂😃

Ok then we are stuck with a defective 1250$ devices ( I even paid more actually)

hoping that a software update can fix that or even apple achnowledging it 😂😂😂