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Are you experiencing this issue?


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This says it all for me:


IMG_7606.jpeg
 
I remember we all had issues back then with iPhone 13. Suddenly it became tolerable :p

I remember only 13 mini was kinda bearable.
My bad haven't been on this forum in awhile, was hoping there would be some solution by now and that sucks that the regular 13 wasn't bearable either
 
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I told myself I wouldn’t pre-order again. I told myself I wouldn’t post here about it.
Sigh……

One evening on the 15PM and my eyes feel damaged today. When I opened the curtains this morning and the bright sun hit my eyes, I had strobing vision for several minutes, something I’ve never experienced in my life before. It was actually scary as it hurt and my vision looked like all those videos of the lines pulsing across the iPhone screen! WTF.

My eye muscles are heavily fatigued and I feel nauseous. F these phones. Sure, there is something different as I felt reasonable last night while using the phone, but today feels awful and has genuinely worried me - why would I do this to myself? I’m risking my health for this bull_hit technology!

IMG_7607.jpeg
 
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I don’t understand why the regular 15 should be better than the pro model. If I see this test the PWM is very noticeable. Can anyone explain please?

 
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I don’t understand why the regular 15 should be better than the pro model. If I see this test the PWM is very noticeable. Can anyone explain please?

That's not really a test.....

Check out the Reddit guy, he is posting numbers.
 
I had an issue with a headache with the 14 Pro last year that meant I had to return it. Got a 15 Pro and it feels the same. Dizzy/spaced and a headache right between the eyes.

Can't be 100% sure it's the phone yet since I had a a couple headaches earlier in the week before I got the phone.

I am worried though since I didn't get the phone direct from Apple and this isn't a valid reason for a return.
 
That's not really a test.....

Check out the Reddit guy, he is posting numbers.
Maybe it's a stupid question. I saw the numbers but on the regular model the PWM/ flicker is very noticeable if you do 240fp slowmotion video. On the 15 pro not. So what's the relationship with the numbers with the reddit guy or the pwm guy. So I didn't get it. I really want to try the pro model because I didn't notice any flickering. But if I read the pwm guy and reddit guy I want to buy the regular model 🤷
 
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I don’t know what the numbers say. My symptoms with 15 remain stable and moderate. Sometimes i feel like i am adjusting to it. I settled with 100% brightness and RWP at 75% which is the sweet spot of not your phone looking dim. Only light pressure on the back/upper part of my head. I am thinking to give 15 plus a go if it’s actually better…..
 
iPhone 15/iPhone 15 Plus might be the better options for sensitive users, as the modulation is apparently much lower: 2.67%* was found at 100% brightness.


This gives me some hope since I doubt Apple would invest over a billion dollars into the technology if they’re weren’t planning to simultaneously overcome the remaining OLED shortcomings.

The bad news is that it’s looking increasingly likely this won’t be solved until iPhone 20.
Hope it won't take 5 years, but even so it'll be a light at the end of our tunnel.
 
Hope it won't take 5 years, but even so it'll be a light at the end of our tunnel.

How to efficiently drive micro LED displays


“The amount of current flowing through an LED determines the gray level (or brightness) of the individual emitter. The gray level of each individual LED that composes a pixel contributes to the overall brightness of the micro LED display.

Panel-based designs used for AMOLED displays typically implement an analog driving technique: The analog voltage (or current) applied to the pixel results in a current through the OLED, determining the gray level. In this approach, a higher current level results in a higher light emission and thus a brighter pixel. But for inorganic micro LEDs, changing the current to vary the gray level also affects the wavelength of the emitted light, causing an undesirable color shift.

As a result, digital driving is preferred for a micro LED display. This approach uses pulse width modulation (PWM) to determine the amount of current flowing through the micro LED so a fixed current level is applied to every LED (without color shift). But the average time that the LED is on — or the duty cycle — can be varied to adjust the average light emission and thus the gray level of the pixel.”
 

How to efficiently drive micro LED displays


“The amount of current flowing through an LED determines the gray level (or brightness) of the individual emitter. The gray level of each individual LED that composes a pixel contributes to the overall brightness of the micro LED display.

Panel-based designs used for AMOLED displays typically implement an analog driving technique: The analog voltage (or current) applied to the pixel results in a current through the OLED, determining the gray level. In this approach, a higher current level results in a higher light emission and thus a brighter pixel. But for inorganic micro LEDs, changing the current to vary the gray level also affects the wavelength of the emitted light, causing an undesirable color shift.

As a result, digital driving is preferred for a micro LED display. This approach uses pulse width modulation (PWM) to determine the amount of current flowing through the micro LED so a fixed current level is applied to every LED (without color shift). But the average time that the LED is on — or the duty cycle — can be varied to adjust the average light emission and thus the gray level of the pixel.”
I wouldn’t put much stock in that. It incorrectly says AMOLED commonly uses analog current (reducing voltage to dim), which we are all aware is not true. With that said, I would still expect them to use PWM for for microLED… mainly because that’s what these electrical engineers are taught in college is most efficient.
 
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Finally got some time to drop by a store for a short test with the Radex Lupin. They had the 15, 15 Pro, and 15 Pro Max on display; the 15 Plus was missing (this was an electronics store, not an Apple Store).

Here are the test results; all measurements were taken with auto brightness off; RWP measurements were taken at 100% brightness.

Model100%75%50%25%RWP 25%RWP 50%RWP 75%RWP 90%
iPhone 155.26.51012555.27
iPhone 15 Pro12.313.516.21912.713.514.917.3

My previous measurements of the 14 range are here: iPhone 14 measurements

The 15 Pro Max was essentially the same as the 15 Pro.

Note: The brightness settings are a rough estimation (i.e. what brightness it is, since the slider doesn't show any percentage; so it is possible that there is a bit of +/- movement regarding what exact brightness the phone was at).

Note 2: Interestingly, just measuring a 14 that I have at home, here are its values (here, I use a shortcut to set the brightness directly, so the brightness setting can be assumed to be accurate):

Model100%75%50%25%RWP 25%RWP 50%RWP 75%RWP 90%
iPhone 1446.89.9123.94.24.86.8

These are slightly different to the measurements I've taken in my previous link above, but I think that is probably explained by the brightness slider inaccuracy.

Note 3: RWP 95% on the iPhone 14 measures ~8.4.

Preliminary conclusion: It seems that the 14 and 15 are aligned, as well as the 14 Pro and the 15 Pro. Minor differences in values, I would suggest are explained by the difference between in store measurement with a brightness slider, and using a shortcut for the 14 that I have at home.

I think if one was to give a model a go, then the 15/15 Plus would be the ones, and run it at 100% brightness, with a RWP setting that isn't too bright. The Radex Lupin manual says that measurement for office monitors should not exceed 5%, and light flickering for visually focused tasks should not exceed 10%. Light flickering up to 20% for all other tasks is acceptable, according to the manual.

So, potentially 100% brightness, with an RWP between 75% and 90%, and use Night Shift/Colour Filters to adjust intensity/colours, may be the best bet to try, at least based on these measurements, and not accounting for people's different reactions.
Thanks for providing these results! Your takeaway aligns with the PWM_Sensitive guy’s. In summary, the non-Pro models have less flicker but still suck.
 
Model 100%
433 Lux
75%
210 Lux
50%
70 Lux
25%
35 Lux
RWP25%RWP50%RWP75%RWP90%
iPhone 15Pro Max11.14%13.54%19.33%63.79%11.17%12.01%15.07%19.26%

Update to pwm away table, with Opple Light Master G3 flicker tool ($50).
True tone and Night Shift off. RWP= reduced white point with brightness at 100%.
Measuring tool is placed exactly 2cm above Oled screen in dark room. Under 12% is considered No Risk.
Tool measured brightness in Lux too. Surpringly my 11 LCD was measured at 400 Lux at 100%, 433 Lux for 15PM.

In conclusion 15 PM is very similar to 14 PM, not better. Their frequencies are both 480 Hz.
@ a busy store with my Opple tool to follow up on my table above.
1. All 15 series run at a 480Hz frequency. iPhone 14 as well. iPhone 13 shows a 100 Hz frequency (bad).
2. In line with pwm away last tests, a quick test of the 15 and 15+ shows modulations about half of the 15P and 15PM, so the non-Pro should be better in theory, I don't have one at home.

My eyes seem quite ok with the 15PM for now, a full week will be necessary to be sure.
 
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/u/the_top_g on Reddit is definitely someone we should befriend.

Here is a message from him in /r/PWM_Sensitive:




Some of his threads have been reposted here, but here is the full list:
Also:

Very good reads.
Thanks for the invite and looking at the past comments, I am flattered!
 
@ a busy store with my Opple tool to follow up on my table above.
1. All 15 series run at a 480Hz frequency. iPhone 14 as well. iPhone 13 shows a 100 Hz frequency (bad).
2. In line with pwm away last tests, a quick test of the 15 and 15+ shows modulations about half of the 15P and 15PM, so the non-Pro should be better in theory, I don't have one at home.

My eyes seem quite ok with the 15PM for now, a full week will be necessary to be sure.
Are you able to share the raw data of the iphone 15?

As I think there is more to it than how Opple computes it. With a look at the raw data we can know for sure what's actually happening.

Btw, the 15P and 15 PM are using 480 hertz sine-wave while at higher brightness, while switching to 2x240 hertz complex wave with different flicker interval at lower brightness.

Again, this information wouldn't be available to you unless you look at the raw data :)
 
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Its frustrating relying on measurements and numbers. We all seem to be different. Symptom wise and what peg us. For me the pros last year were such a no go that I’m not even gonna look at one this year. I’ve been successfully using a 14 since last March. My wife got a 15 regular size yesterday and I helped her set it up. It seems to be similar to my 14 but I haven’t really used it a lot. Wish there was some iron clan explanation why the regular series works better for some of us than the pros. Confusing.

Also the two dreaded words: screen lottery

As now I see it has posted frequently, you just have to try it for yourself 🙂
 
Its frustrating relying on measurements and numbers. We all seem to be different. Symptom wise and what peg us. For me the pros last year were such a no go that I’m not even gonna look at one this year. I’ve been successfully using a 14 since last March. My wife got a 15 regular size yesterday and I helped her set it up. It seems to be similar to my 14 but I haven’t really used it a lot. Wish there was some iron clan explanation why the regular series works better for some of us than the pros. Confusing.

Also the two dreaded words: screen lottery

As now I see it has posted frequently, you just have to try it for yourself 🙂
Yes I do agree but allow me to speak on why we have to do so.

The reason why we have to rely on measurements and numbers is because screen technology is becoming more complex than ever. The concept of a flickering screen verse a flicker free screen no longer exist in today's context.

Instead,they are now on a spectrum where all of them flickers. The question is on how badly it flickers, and whether is that flickering percivable at the said range. Thus the only way we can determine the range of the flicker is to quantify it.

Some may be more affected by it, while some aren't. It is like our weather temperature. To someone living in the far east 26 degrees (or 78 F) is a cool weather but to someone living in the northern europe it is perhaps very hot. We wouldn't know whats really hot or cold unless we quantify in terms of numbers.

Panel variant could be a possibility since it is a well known fact in China. Large companies like Honor or Xiaomi relies on two or more suppliers. When the experience delivered by different screen suppliers distinctly varies, it is called "screen lottery". This was how the term first originated from.

Apple could well be using from different screen suppliers and we wouldn't know if there is a lottery unless we quantify them through measurement
 
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How to efficiently drive micro LED displays


“The amount of current flowing through an LED determines the gray level (or brightness) of the individual emitter. The gray level of each individual LED that composes a pixel contributes to the overall brightness of the micro LED display.

Panel-based designs used for AMOLED displays typically implement an analog driving technique: The analog voltage (or current) applied to the pixel results in a current through the OLED, determining the gray level. In this approach, a higher current level results in a higher light emission and thus a brighter pixel. But for inorganic micro LEDs, changing the current to vary the gray level also affects the wavelength of the emitted light, causing an undesirable color shift.

As a result, digital driving is preferred for a micro LED display. This approach uses pulse width modulation (PWM) to determine the amount of current flowing through the micro LED so a fixed current level is applied to every LED (without color shift). But the average time that the LED is on — or the duty cycle — can be varied to adjust the average light emission and thus the gray level of the pixel.”
Thanks for killing my hope! lol But who knows what the exact tech will be when it comes out.
 
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Anyone else thinking of trying the 15 Plus after seeing these results? I had no plans to order anything but I'm thinking of giving it a shot. I had the 14PM last year and returned it. I never tried the 100% brightness and 80-90% RWP setting though, so I want to try it on this phone and see how I tolerate it.
 
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