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Comment by kphorn | original | The MacBook Pro's OLED PWM Problem: When a 'Better' Display Becomes Worse to Use
[−]kphorn · 2026-11-15 Sun 14:26 UTC · link
If it’s as low as 240hz, anyone will see a stop motion effect by waving an open hand in front of the screen at 50% brightness.

I’m curious if this is a harmonic mode for a high speed PWM where pulses are either not even widths or the driver loses some power at the 240hz cycle. May perceive similarly.

I have a couple windows laptop workstations with high dpi OLEDs (one with 240hz refresh rate) that I love and don’t perceive this so I’ll have to check.

[−]avalys · 2026-11-15 Sun 15:08 UTC · link
I have one of these laptops, I tried waving my hand in front of the screen at 50% brightness and I don't observe anything unusual.

I think I am pretty insensitive to this effect, though. Other than occasional seeing a bit of 60 Hz flicker out of the corner of my eye from Christmas lights, automotive LED tail lights, etc. I don't tend to notice flicker.