s25 Ultra - Severe Eye Strain - PWM Causing TLM

[FirebirdFormula]

Hello.  I recently swapped an s21 Ultra to an s25 Ultra.  I loved/love both phones, outside of the eye strain that the s25 Ultra is giving me.  Unfortunately I cannot use it for more than 2-3 minutes at a time without feeling the strain which then lingers for hours and interferes with sleep.  I have only ever experienced this with certain computer monitors, never with a mobile device.

The issue is referred to as temporal light modulation (which is often referenced as "flicker") theoretically caused by the use of pulse width modulation.  One can read about more users having this problem here.

This has created quite a headache (no pun) with the Verizon store as my s21 Ultra that I traded in is no longer available to me.  They're ordering me a new s21 Ultra and are going to be in touch this week.

I would really, really like to keep the s25 Ultra, outside of this, I love this phone and even with a trade-in, paid a premium for it as I did the s21 Ultra.  I am curious if there are any efforts or plans to address this or if anyone has any ideas.  I am a power user & all display options & developer options do not help.  

Thank you for your time.

[DB93]

Yes it's all very strange!  

I think the bad luminance ballance comes from the Gorilla Glass' anti-reflective coating.

Does anyone has similar issues with the previous S24U model? Same PWM rate, also anti-reflective-coating....but same eye problems?

[StefanoSnap]

I've had the Note3, Note4, Note8, Note10, Note20+, S23U, and now the S24U. I started having vision problems beginning with the S23U — for me, it was like looking at welding light with the naked eye. With the S24U things have slightly improved, but it's still extremely uncomfortable and harmful to eye health. The main issue is the low PWM frequency and the modulation. I don't have the courage to switch to the S25U because of what I went through with the S23U. If you look closely online, the S25U doesn't have a fixed 480Hz PWM; it has dual modulation that varies between 480Hz and 240Hz. I don’t know what kind of madness they’ve come up with, but it’s really bad for eye health. They should immediately give us a feature that enables reading mode, even at the expense of color quality — it's truly a shame.