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TheBigApple2006

macrumors 6502
Original poster
Feb 20, 2006
336
65
I have the 1TB iPad Pro M4 and whilst generally pleased with the screen (coming from a 2020 LCD model), I feel that there is slight light bleed/brighter edges all around the borders of the screen. It is difficult to reproduce, as it only occurs with specific colours, such as deep blue, greys and is visible with whites too. It creates a slight but visible imbalance in colour uniformity with regards to the centre of the screen. It is not entirely dissimilar from a classic IPS glow, but of course far less prominent.

Here are some photos taken with my 14 Pro, which also appears to exhibit this issue in part.
From looking around the web it would appear that this is an OLED issue, rather than a specific iPad one, but just wanted to check whether others are experiencing this too. Would be very interested in hearing if others are noticing this too.
 

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TheBigApple2006

macrumors 6502
Original poster
Feb 20, 2006
336
65
Thanks to both - do you see a uniformity similar to my photos on your own devices, if at all possible to compare? Perhaps I am being too stringent in my QC analysis.
 
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Spacegray

macrumors regular
Apr 10, 2016
201
160
I know what you mean and i noticed this on two iPP M4 11".
It is no bleed but some uniformity issue that i often see on OLED devices. All around the screen (about 5mm) the color is a little brighter.
I have only noticed it on solid colors and in dark mode if the background is not solid black (off) but very dark grey.
I don't know the reason for this but i guess you will have to live with that.
 

TheBigApple2006

macrumors 6502
Original poster
Feb 20, 2006
336
65
I know what you mean and i noticed this on two iPP M4 11".
It is no bleed but some uniformity issue that i often see on OLED devices. All around the screen (about 5mm) the color is a little brighter.
I have only noticed it on solid colors and in dark mode if the background is not solid black (off) but very dark grey.
I don't know the reason for this but i guess you will have to live with that.
Thanks - this is exactly what I am witnessing. You have described it perfectly.
My question is whether its worth trying an exchange (am still within initial 14 days) or whether I should live with it as an intrinsic shortcoming/feature of OLED displays, much like the vignetting of miniLED ones around the edges. Grateful for opinions on this.
 

Slartibart

macrumors 68040
Aug 19, 2020
3,142
2,817
while that might be an issue - but one would have to measure that - there is an optical illusion called »Machband« which is an optical phenomenon from edge enhancement in the human retina and which might impact the visual perception here.

But again, I think that one would have to measure, which requires some slightly more advanced equipment for the described scenario.
 

sparksd

macrumors G3
Jun 7, 2015
9,987
34,200
Seattle WA
Thanks - this is exactly what I am witnessing. You have described it perfectly.
My question is whether its worth trying an exchange (am still within initial 14 days) or whether I should live with it as an intrinsic shortcoming/feature of OLED displays, much like the vignetting of miniLED ones around the edges. Grateful for opinions on this.

To answer that, you have to consider the question is this something you see and find bothersome in your normal usage or is it something you only encounter in an extreme test?
 

TheBigApple2006

macrumors 6502
Original poster
Feb 20, 2006
336
65
To answer that, you have to consider the question is this something you see and find bothersome in your normal usage or is it something you only encounter in an extreme test?
Thanks. I would say that its noticeable rather than bothersome for the time being. But at present I am just trying to figure out whether it is something which is likely to be present in every model, or I should try the panel lottery. From @Spacegray's post above it appears that this is a 'feature' more than an anomaly, and I should try to live with it, if I want to use the OLED iPads. But the miniLEDs for example had vignetting and blooming which were part of the package, so downgrading to that might not be worthwhile.
 

sparksd

macrumors G3
Jun 7, 2015
9,987
34,200
Seattle WA
Thanks. I would say that its noticeable rather than bothersome for the time being. But at present I am just trying to figure out whether it is something which is likely to be present in every model, or I should try the panel lottery. From @Spacegray's post above it appears that this is a 'feature' more than an anomaly, and I should try to live with it, if I want to use the OLED iPads. But the miniLEDs for example had vignetting and blooming which were part of the package, so downgrading to that might not be worthwhile.

I upgraded from the M1 12.9 to the M4 13 Pro - the 13 is the better display in my view.
 

DeepSix

macrumors 6502a
Feb 4, 2022
835
923
It could be one of the hidden features Apple provides, just like Jelly roll was on Mini 6. It seems to enhance the picture quality.
 

TheBigApple2006

macrumors 6502
Original poster
Feb 20, 2006
336
65
I upgraded from the M1 12.9 to the M4 13 Pro - the 13 is the better display in my view.
It is no doubt a much better display than my iPad Pro 12.9 2020, the last of the LCD ones. But still, I wonder whether all OLEDs are like mine...
 

klasma

macrumors 604
Jun 8, 2017
7,436
20,719
I have no noticeable non-uniformities on the M4. It’s one of the things I test after setting up a new device, and I would exchange it when it’s as bad as in your pictures.
 

DeepSix

macrumors 6502a
Feb 4, 2022
835
923
Well that is what you call bleeding edge technology. After all the M4 iPad is that great.
 

bryo

macrumors regular
Apr 6, 2021
100
168
I’m not sure what you mean. The photos will not represent the uniformity well due to the camera sensors.

If you mean on the very very edge along the screen borders where there may be a pixel width worth of what might look like discoloration, that’s pretty typical of an oled depending on the pixel structure and ppi.

From the photos I don’t really see anything abnormal.
 

TheBigApple2006

macrumors 6502
Original poster
Feb 20, 2006
336
65
I’m not sure what you mean. The photos will not represent the uniformity well due to the camera sensors.

If you mean on the very very edge along the screen borders where there may be a pixel width worth of what might look like discoloration, that’s pretty typical of an oled depending on the pixel structure and ppi.

From the photos I don’t really see anything abnormal.
Thanks this is more or less what I meant - a discoloration or brighter strip along with very edge of the screen, on all four sides. On certain colours (say dark blue/violet or gray) it is more prominent and visible.

I went to my local Apple Store and took some photos of display models. Here they are. I think they exhibit very similar patterns around the edges. As you can see on the Guardian webpage (edge) and the light grey on the Flexispot page, the edge and surrounding areas are brighter than further into the screen.

I do agree that the camera pics accentuate this, but it is visible to me to the naked eye as well.

My question is whether both my unit and the two store ones are flawed, or whether all three are par for the course with this current OLED technology.

CCE13973-FCAE-4E4F-B54A-5C44F7926B88_1_105_c.jpeg
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thadoggfather

macrumors P6
Oct 1, 2007
16,122
17,038
Maybe ever so slightly but I’d prolly keep it. Looks like a nice clear white / good tint uniformity in general imo
 

bryo

macrumors regular
Apr 6, 2021
100
168
Thanks this is more or less what I meant - a discoloration or brighter strip along with very edge of the screen, on all four sides. On certain colours (say dark blue/violet or gray) it is more prominent and visible.

I went to my local Apple Store and took some photos of display models. Here they are. I think they exhibit very similar patterns around the edges. As you can see on the Guardian webpage (edge) and the light grey on the Flexispot page, the edge and surrounding areas are brighter than further into the screen.

I do agree that the camera pics accentuate this, but it is visible to me to the naked eye as well.

My question is whether both my unit and the two store ones are flawed, or whether all three are par for the course with this current OLED technology.

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Thanks! Yeah I think this is normal. I have the same thing on my steam deck oled but it’s more prominent on that device because of its lower pixels per inch. It being noticeable on different colors is due to the structure of the oled sub-pixels. I wouldn’t worry too much about this personally.
 
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fel10

macrumors 68020
Feb 2, 2010
2,295
3,550
Woodstock, GA USA
I just got the iPad 13 with the M4 chip today and noticed that the left side of the screen has a slightly yellowish tint compared to the right side. I went back to exchange it, but the new one has the same issue.


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