Quote:
Originally Posted by rowe
You can use an Opple Light Master to measure the PWM. But as others said the only thing that really matters for an individual is whether the PWM on the device affects you or not. For this reason I've never bothered buying one as I quickly tell whether the PWM is affecting me or not.
The only readers I've ever known marketed as DC-dimming are Hisense. But even though their lighting is probably the lowest risk for uncomfortable PWM, even DC-dimming lighting sometimes uses PWM between steps.
Ereaders that don't have negative PWM affects for me:
Hisense, old Boox (Poke Pro, Nova 2/3), various Kindles
E-ink devices whose PWM lighting is unusably uncomfortable for me:
Dasung monitors, newer Boox (Palma, Page, Tab Ultra C, Mira)
This will vary across users as different people have different PWM sensitivities.
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According to
https://onyxboox.com/ they use DC lighting with "flicker free" technology. Could it be something else?
For me, I get nauseous from very cold light. So my Hisense A5 Pro was a no go in that regard. I don't have a problem with headaches when it comes to frontlights, but I just dislike them in general - they are not warm enough on modern devices. Except for the Palma frontlight being very uneven, I don't perceive it as much worse than the one on the A9, for instance.