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Old 03-29-2020, 01:38 AM   #36
DNSB
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Posts: 46,978
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Join Date: Jul 2010
Location: Vancouver
Device: Kobo Sage, Libra Colour, Lenovo M8 FHD, Paperwhite 4, Tolino epos
Quote:
Originally Posted by MarjaE View Post
I have a strobe sensitivity, and need to avoid flicker and red light as well as the usual blue light. I find most screens are far too bright at 0% brightness, and apparently many screens use pulse-width modulation so they flicker at low brightness. How does this affect the choices available?
AFAIK, the only Kobo ereader that uses PWM is the Forma which uses 1KHz PWM. Well above the frequency at which even the most sensitive will notice flicker during a saccade. As for 0% brightness? I checked the 4 Kobo ereaders I currently use and none of them emitted any light visible in a completely dark room after 5 minutes for dark adaptation.
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