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excavate8603

macrumors newbie
May 15, 2024
4
4
View attachment 2386468


A Quick update.After using the device for more than 2 days,I am having a slight different issue from previous one.
I am experiencing this particular green line on some “particular” set of wallpapers from Macos Big Sur.
But when i try them on two different M4 11” they don’t have such issues.

Should i go for a replacement again? I think i will wait till things settle down and go for a replacement after some months.Hopefully the manufacturing issues have sorted out by then.
Green line is a typical OLED issue. Replace it.
 

Shazhank3385

macrumors newbie
Jan 20, 2022
13
5
Here is a video for reference.It moves with the wallpaper.If it was a screen defect it would have been stationary?
What do you guys make of this? Is this a wallpaper glitch or an oled issue?

 
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Star-fire

macrumors 6502
Jul 4, 2007
319
129
This is my second 13” (returned first for a different reason) And I guess I can see it if I use a 10x loupe to look at the screen but just reading say the forum here, screen looks perfect. Maybe it is a 11” only thing.
 

ipaddaro

macrumors 6502
Dec 6, 2014
290
73
photos at the screen highly amplify the problem… keep this in mind. I can’t see a much grain (or I can see none at all) but if I take a photo with iPhone 14 pro it seems very noticeable
 

Shazhank3385

macrumors newbie
Jan 20, 2022
13
5
True. I just expect better considering this is a higher end device aimed at professionals. If this was an OLED mini that 90 percent of people used for consumption it would never get noticed.

UPDATE: returned and told the store what’s going on. Seemed like they knew but didn’t wanna say much else about it. First time returning an iPad in 14 years.
Same here.Returned mine too after a replacement.I think i will buy it at after a couple of months provided they sort these issues out.
 

sk1985

macrumors 6502
Jan 13, 2006
311
90
While I haven’t noticed graininess on a gray or black scale I have noticed blurry text and aliasing on small windows playing videos and YouTube content.
 

jonnyb098

macrumors 601
Nov 16, 2010
4,248
6,492
Michigan
Same here.Returned mine too after a replacement.I think i will buy it at after a couple of months provided they sort these issues out.
After WWDC….in might just stick with my M2. There’s literally nothing that was announced that’ll benefit from the M4….even the fancy new calculator app 🤣
 
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TBoneMac

macrumors 6502
Nov 26, 2017
300
100
CA
Here a shoot from the iPad Pro 13“
Display. This is the same crap matrix from the „Nintendo switch Oled“ with two blue subpixels…
Wow that’s really disappointing.

So essentially, it has less subpixels than the 2022 iPad Pro which means it’s has a less clear/crisp image.
 
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TBoneMac

macrumors 6502
Nov 26, 2017
300
100
CA
While I haven’t noticed graininess on a gray or black scale I have noticed blurry text and aliasing on small windows playing videos and YouTube content.
That’s probably because it has less subpixels than all the older iPads. It’s technically the lowest quality ipad in terms of resolution (subpixel count)
 

TBoneMac

macrumors 6502
Nov 26, 2017
300
100
CA
Is it just me or is this screen just a touch more blurry, than the IPS and other OLED, I do not see the screen door / grain effect, i just am getting some softening around text.
It has to be blurrier than the IPS iPads (unless the resolution is 1.5x higher to compensate for the 33% drop in subpixel count).

It has less subpixels overall because of the subpixel layout (it has R/B G/B supixels i.e 2 blues for every 1 red and green subpixel) – other iPads have R/G/B for each pixel (i.e. 3 subpixels per pixel IPS as opposed to only 2 subpixels per pixel OLED) where as most OLED screens have only two subpixels per pixel. This is why most OLED screens have really high resolution (to compensate for the lower amount of subpixels).

Less subpixels essentially means a 4K LCD with R/G/B (standard) subpixel layout will look clearer than a 4K OLED with R/B // G/B subpixel layout.

Essentially with OLED you get better blacks at the cost of lower (true) resolution and lower overall brightness (unless you do something like Apples Tandem-OLED display, but this only fixes the brightness issue not the subpixel issue)”

To avoid this issue when Apple introduced the iPhone X they upped the resolution substantially. People thought it was to be closer to other android phones but in reality (my assumption), they updated it from around 300ppi to 450ppi because of what I stated here. They knew that they needed to increase the pixels per inch by 1.5x in order to keep the image quality in line with previous iphones so they did just that.

Another way to explain it is that most OLEDs use 2 subpixels per pixel.

So essentially a 4K OLED is similar to a 2.666K LCD

just to be clear, this is NOT HOW ALL OLEDS ARE. OLED TVs often do not have this fault/compromise and that’s because TV’s are generally not used as often as phones/tablets. Most OLED phones and tablets (all of the ones I can think of) use 2 subpixels per pixel.
 
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klasma

macrumors 604
Jun 8, 2017
7,440
20,728
It has to be blurrier than the IPS iPads (unless the resolution is 1.5x higher to compensate for the 33% drop in subpixel count).

It has less subpixels overall because of the subpixel layout (it has R/B G/B supixels i.e 2 blues for every 1 red and green subpixel) – other iPads have R/G/B for each pixel (i.e. 3 subpixels per pixel IPS as opposed to only 2 subpixels per pixel OLED) where as most OLED screens have only two subpixels per pixel. This is why most OLED screens have really high resolution (to compensate for the lower amount of subpixels).

Less subpixels essentially means a 4K LCD with R/G/B (standard) subpixel layout will look clearer than a 4K OLED with R/B // G/B subpixel layout.

Essentially with OLED you get better blacks at the cost of lower (true) resolution and lower overall brightness (unless you do something like Apples Tandem-OLED display, but this only fixes the brightness issue not the subpixel issue)”

To avoid this issue when Apple introduced the iPhone X they upped the resolution substantially. People thought it was to be closer to other android phones but in reality (my assumption), they updated it from around 300ppi to 450ppi because of what I stated here. They knew that they needed to increase the pixels per inch by 1.5x in order to keep the image quality in line with previous iphones so they did just that.

Another way to explain it is that most OLEDs use 2 subpixels per pixel.

So essentially a 4K OLED is similar to a 2.666K LCD

just to be clear, this is NOT HOW ALL OLEDS ARE. OLED TVs often do not have this fault/compromise and that’s because TV’s are generally not used as often as phones/tablets. Most OLED phones and tablets (all of the ones I can think of) use 2 subpixels per pixel.
That's incorrect, they have three RGB subpixels per pixel, look at the video I linked here: https://forums.macrumors.com/threads/2024-ipad-pro-subpixel-layout-question.2429002/post-33206339
 

AppelGeenyus

macrumors regular
Nov 3, 2019
227
295
It has to be blurrier than the IPS iPads (unless the resolution is 1.5x higher to compensate for the 33% drop in subpixel count).

It has less subpixels overall because of the subpixel layout (it has R/B G/B supixels i.e 2 blues for every 1 red and green subpixel) – other iPads have R/G/B for each pixel (i.e. 3 subpixels per pixel IPS as opposed to only 2 subpixels per pixel OLED) where as most OLED screens have only two subpixels per pixel. This is why most OLED screens have really high resolution (to compensate for the lower amount of subpixels).

Less subpixels essentially means a 4K LCD with R/G/B (standard) subpixel layout will look clearer than a 4K OLED with R/B // G/B subpixel layout.

Essentially with OLED you get better blacks at the cost of lower (true) resolution and lower overall brightness (unless you do something like Apples Tandem-OLED display, but this only fixes the brightness issue not the subpixel issue)”

To avoid this issue when Apple introduced the iPhone X they upped the resolution substantially. People thought it was to be closer to other android phones but in reality (my assumption), they updated it from around 300ppi to 450ppi because of what I stated here. They knew that they needed to increase the pixels per inch by 1.5x in order to keep the image quality in line with previous iphones so they did just that.

Another way to explain it is that most OLEDs use 2 subpixels per pixel.

So essentially a 4K OLED is similar to a 2.666K LCD

just to be clear, this is NOT HOW ALL OLEDS ARE. OLED TVs often do not have this fault/compromise and that’s because TV’s are generally not used as often as phones/tablets. Most OLED phones and tablets (all of the ones I can think of) use 2 subpixels per pixel.
Everything you are saying is wrong. Please stop spamming this nonsense.
 
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IT Troll

macrumors 6502
Mar 16, 2012
315
230
Edinburgh
It has less subpixels overall because of the subpixel layout (it has R/B G/B supixels i.e 2 blues for every 1 red and green subpixel) – other iPads have R/G/B for each pixel (i.e. 3 subpixels per pixel IPS as opposed to only 2 subpixels per pixel OLED) where as most OLED screens have only two subpixels per pixel.
It still has three RGB subpixels/diodes per pixel, but they have different sizes. This does mean that there can be a loss of sharpness at the junction between contrasting colours; e.g. text.

But the issue is subpixel size and layout, rather than quantity ratio.

subpixels.jpg
 
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sk1985

macrumors 6502
Jan 13, 2006
311
90
Does anyone have a M4 IPP that does NOT look like this? If so, can you take a picture of it?
Mine does NOT look like that. All oleds struggle with grays and crush blacks. It’s not an end all be all solution like people think. Some of the best reference monitors are still LCD which I actually prefer for lots of reasons.
 
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pin87a

macrumors member
Apr 9, 2011
39
117
Another data point on this. I am not suggesting that anyone is right or wrong or not seeing what they are seeing.


11" M1 Left, 11" M4 Right
Dark room, 25% brightness

At normal viewing distance I don't see any "graininess". If I zoom way in on this image I can see "grain" on both. 🤷‍♂️

both.jpg


Zoomed way in (3x on iPhone 15 Pro)

As above, when zoomed way in (this time with optical zoom) I see "grain" on both (in the photograph). 🤷‍♂️


M1

m1.jpg



M4

m4.jpg




27" Studio Display 3x Zoom (iPhone 15 Pro)

Also, "grainy" in the photograph. 🤷‍♂️

studio_display.jpg



At this point I'm looking for a display I can photograph with my iPhone that doesn't have "grain" when zoomed in. I don't see any of this in normal usage. I need to get a magnifying glass to remove the camera from the equation, but I'm not invested enough in this to do that lol.
 
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IT Troll

macrumors 6502
Mar 16, 2012
315
230
Edinburgh
Some of what you see in the images is camera sensor noise from the low-light conditions and/or jpeg artefacts from compression. But you can also see that the M4 has a very fine grain across the whole display which is not present on the others.
 
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