ASUS Flicker-Free technology uses Smart Dynamic Backlight Adjustment to reduce flicker for a comfortable viewing experience. Smart Dynamic Backlight Adjustment avoids low brightness levels that lead to high-speed LED backlight flashing.

I pulled that from here: https://www.asus.com/microsite/display/eye_care_technology/

So it's not a true flicker-free backlight? This text surprises me. Anyone have a comment?

    They are not clearly saying what's up. Whatever it means, to me it seems no AC-driven backlight is free of flicker. There will always be measurable flicker, either more or less, or tiny. Don't be fooled by such advertising. The only thing it means is either "we're not using on/off PWM" (but there's still some pulsations) or "the flicker is not consciously perceivable as flicker", both which doesn't mean it won't hurt or cause symptoms.

      KM Why can't they use a true flicker-free DC backlight?

        5 years later

        K-Moss It says there how TUV flicker free certified devices are being tested, https://www.tuv.com/world/en/eye-comfort.html

        It does not go into detail, but I have realised there are stars also in addition to certification itself. It does not say how they test a flicker but you can see in image there of laboratory and this statement of stars - "The standards for 3/4/5-star ratings remain different. The higher the star rating, the more stringent the standards.". However, I was a bit sceptical of this certification, because many brands still keep it on OLED displays, when everyone is complaining about eye strain.

        • JTL replied to this.

            Donux It does not go into detail, but I have realised there are stars also in addition to certification itself. It does not say how they test a flicker but you can see in image there of laboratory and this statement of stars

            In other words, a bunch of words that say nothing.

              dev