The eye does not see anything. Photons impacting photoreceptors will trigger a signaling cascade that will send a signal to the brain, which is the organ that actually sees anything. It is very likely that the signaling process triggered by light does not have the resolution to distinguish between constant illumination or discontinuous illumination with a frequency of 200 Hz, thus conveying the exact same signal to the brain.
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iPhone 12 Is iPhone 12 still using PWM OLED?
- Thread starter changguangyu
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You are doing that everytime you look at anything illuminated by LED lights at night and even at way lower frequencies. However, as you did not think about that, you were probably OK.
Have the people with this issue contacted a dr yet? Because coming on here saying iPhones are bad for you when the vast majority of people don’t have this issue makes you look a bit crazy, especially with how hard some of you are pushing this. Go to a doctor and figure out what’s wrong with you.
LED screens and LED lights do not work the same way. LED lights go on and off at a frequency that can be as low as 50 Hz (noticeable) but normally is in the 100Hz range (not noticeable). It is not the same as the PWM system used to reduce brightness in LED screens, although the final effect is similar: the light is off for a tiny fraction of a second, many times per second.
I have the same Situation like GrumpyMom, with the 11 Pro everything is fine, with the 12 Pro (I returned the 128 GB silver Version) i soon had dry eyes and dizziness. My also had a yellow tint without TrueTone and in dark rooms the Auto-Brightness makes the OLED Panel so dark, that there is no real Contrast between the Background and the Text on the Icons in the Homescreen. My 11 Pro is not so dark in the same Condition and has real crisp white.
So i made a lot of different Videos of the PWM Flickering with a Slow-Motion Cam one is here and i found a difference. I think from the Rate both should be the same but the 11 Pro refreshes from bottom to top, the new 12 Pro from top to bottom and i think this makes me feel dizzy.
From following review of iPhone 11 and 12. You can use google translate to get it in English.
www.ixbt.com
Сравнительный обзор смартфонов Apple iPhone 12 и iPhone 12 Pro
iPhone 12 и iPhone 12 Pro получились симпатичными, но не прорывными устройствами. Разве что увеличение дисплея и обновление дизайна действительно производят впечатление, причем внешность iPhone 12 Pro понравилась нам существенно больше. Вдобавок, производитель уверяет, что смартфоны теперь куда...
Hmm, so apparently according to this site, the PWM frequency is 240Hz- isn't that the same as the XS, and below the 290 measured on the 11 Pro?From following review of iPhone 11 and 12. You can use google translate to get it in English.
Сравнительный обзор смартфонов Apple iPhone 12 и iPhone 12 Pro
iPhone 12 и iPhone 12 Pro получились симпатичными, но не прорывными устройствами. Разве что увеличение дисплея и обновление дизайна действительно производят впечатление, причем внешность iPhone 12 Pro понравилась нам существенно больше. Вдобавок, производитель уверяет, что смартфоны теперь куда...
I do like what I see here, though, that 50% brightness seems to have the least flicker, which might work for those of us who are sensitive? I had some trouble with the XS, never got to look at an 11 Pro, but am planning to pull the trigger on a 12 mini this Friday. Fingers crossed I won't have any trouble with it!
Which would be two days after this week's preorder for the mini and the pro max, so if people were worried about wanting to have that window, they will have to wait a couple of days to preorder. Or does preorder not count, and the purchase date is actually the day the device arrives?
You are being pedantic, everyone knows it is the brain that sees the image. Obviously the meaning behind my statement was "the light is still entering the eyes", regardless of whether the brain is conscience of it or not.
Although I don't suffer from this particular issue, having had Strabismus and other eye issues for a long time I know enough about eye muscles and reflex to understand this is a very real issue for many. If the brain was in full conscience control of all the eye muscles separately, we would be able to fix most visual acuity issues ourselves without glasses.
I don't think it's helpful for you to come on here and dismiss the problem by picking flaws in choice of words. Eye disorders are not exclusive to ophthalmologists. I am purely on here following the issue as I take an interest in it.
It's quite simple. The rods and cones on the retina of any healthy eye will be receiving this flickering light regardless. Part of the issue appears to be around some peoples sensitivity to it; eye muscles subconsciously trying to focus on this flicker and making the eye muscles quite tired as a result is one suggestion.
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It's very interesting the number of people who contribute to this thread who aren't at all affected by PWM, and are keen to 'prove' those who are affected are either imagining it, mentally/physically dysfunctional or in such a tiny minority that they should simply suck it up or be ignored.
Why would they bother getting involved in conversations that have zero bearing on their life...what is their motive?
Are they genuinely curious to find out more about this, or just Apple fanboys / employees desperate to defend the brand...or simply trolling?
Indeed, I have no idea! personally I follow the thread because I do have other eye issues - double vision and sudden loss of focus on right eye from time to time. Whilst these do not appear to be related to PWM (started years before OLED was a thing), increased usage of computer screens of all types definitely has a direct link to the issues I have; so finding out more about other eye disorders related to computer screens and how other people suffer and deal with it can be quite helpful to me.
Just remember - smart people are inquisitive and full of doubt whilst dumb people are small minded and know it all. Even at Moorfields eye hospital, one of the best in the world, they do not know everything - studies are still being done there on the long term effect of computer screens on the eyes and their link to particular disorders that are on the rise.
A little of both, to be truthful. I am curious why a group of people have this issue, and why another group doesn’t. And why 3 generations of phones have this same issue that has not been corrected. Trolling is out of boredom and it keeps people on their toes. It’s good for all of us.
Neither. I don’t have the issue. But if you took the time to read any of the 100+ pages of the iPhone X thread regarding PWM you’d see testimony of the many who have been seen by ophthalmologists. Or, if you hopped on over to YouTube and did a little search, you’d find tech reviewers who acknowledge and discuss the issue. Orrrrrr, you could even let Google be your friend and read about the science behind PWM and the reasonings of why it may or may not cause issues for certain beings.
You know, maybe a tad bit of due diligence before spouting off as if these people are trying to create fear mongering by discussing something that affects them.
I strongly disagree trolling is 'good for all of us'.
I think it dilutes the useful relevant information to a meaningless childish futile noise based on imaginary viewpoints.
Anyway, I digress.
I don't think PWM sensitivity is any harder to appreciate than an allergy or unpleasant reaction that some people have, and other people don't. We are not all the same.
There is a reason why these threads exist, and indeed why websites such as notebookcheck go to all the trouble of analysing every device for PWM.
For those affected, it can effectively render the device pretty much useless.
It took manufacturers a few years to rectify their LED screens to be PWM-free. I can only assume enough people complained for them to finally sort it out.
Maybe OLED has to go through a similar 'maturing' process.
Thanks for offering to help. Do you have any eye strain issues with the 11/XR/iPad Pro 2018?
