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OtinG · 10-24-2021, 11:28 AM

I suspect there is a tiny bit of jelly rolling with almost all similar types of displays, regardless of manufacturer, due to the way the screens are updated. From what I understand, the screens are updated line by line starting on one side of the display (when in portrait mode) and progressing across to the other side of the screen. If you took a super-slow motion video of the process it would be very noticeable. Under certain viewing conditions this process can make the line of pixels across the screen appear to be slanted for a fraction of a second. However, the process is happening so fast in real time our eyes rarely will perceive it on a good display.

I checked my iPad mini 5 after I heard of this on the mini 6 and under some lighting conditions with certain scrolling speeds I can see it, but it is not nearly as pronounced as in the posted videos. On my mini 5 I have to look for it to see it.

Video specs can also cause some strange things to happen due to frame rates. If you have ever seen a car wheel or a wagon wheel in a movie appear to switch from rotating forward to rotating backwards even when the car or wagon is still moving forward, that is due to the frame rates of the video being refreshed at just the wrong time to create that illusion. Same with video taken of airplane props when the airplane is in the air. You can see a lot of distortion. That is all due to the physics of how video camera shutters work. So whether the jelly rolling looks exactly like the videos is questionable as I've never seen it that bad in person, but it wouldn't surprise me if it is that bad in rare cases.

Having said that, for me I don't think the jelly rolling would be all that distracting for myself as I rarely scroll that fast, and when I do scroll fast it is usually for a very brief period of time. But for others, it might be quite a distraction.

My best guess is that there was a batch or more of the displays that were bad. That doesn't mean every display in the batch was necessarily bad, but some were. Hopefully if that is the case Apple will exchange those units. For those who are hesitant to buy a mini 6 because of this issue, they can go look at a unit in the store and decide if they want it or not. If one buys a mini 6 online, be sure to buy from a retailer with a good return policy. Some retailers like Amazon have a no questions asked return policy of around 15 or more days. Apple offers a return policy too for a few days.

10-24-2021, 11:28 AM	#13
OtinG Old Gadget Guy Posts: 1,913 Karma: 6854865 Join Date: Jun 2018 Device: Oasis 3, iPhone 13 Pro Max, iPad mini 6, iPad Air 2020, Alexa Devices	I suspect there is a tiny bit of jelly rolling with almost all similar types of displays, regardless of manufacturer, due to the way the screens are updated. From what I understand, the screens are updated line by line starting on one side of the display (when in portrait mode) and progressing across to the other side of the screen. If you took a super-slow motion video of the process it would be very noticeable. Under certain viewing conditions this process can make the line of pixels across the screen appear to be slanted for a fraction of a second. However, the process is happening so fast in real time our eyes rarely will perceive it on a good display. I checked my iPad mini 5 after I heard of this on the mini 6 and under some lighting conditions with certain scrolling speeds I can see it, but it is not nearly as pronounced as in the posted videos. On my mini 5 I have to look for it to see it. Video specs can also cause some strange things to happen due to frame rates. If you have ever seen a car wheel or a wagon wheel in a movie appear to switch from rotating forward to rotating backwards even when the car or wagon is still moving forward, that is due to the frame rates of the video being refreshed at just the wrong time to create that illusion. Same with video taken of airplane props when the airplane is in the air. You can see a lot of distortion. That is all due to the physics of how video camera shutters work. So whether the jelly rolling looks exactly like the videos is questionable as I've never seen it that bad in person, but it wouldn't surprise me if it is that bad in rare cases. Having said that, for me I don't think the jelly rolling would be all that distracting for myself as I rarely scroll that fast, and when I do scroll fast it is usually for a very brief period of time. But for others, it might be quite a distraction. My best guess is that there was a batch or more of the displays that were bad. That doesn't mean every display in the batch was necessarily bad, but some were. Hopefully if that is the case Apple will exchange those units. For those who are hesitant to buy a mini 6 because of this issue, they can go look at a unit in the store and decide if they want it or not. If one buys a mini 6 online, be sure to buy from a retailer with a good return policy. Some retailers like Amazon have a no questions asked return policy of around 15 or more days. Apple offers a return policy too for a few days.