Yeah 240 is not a lot. I'm very happy with my new Honor phone that does pwm much better than Samsung. It does more than 2000Hz and way more than my Samsung around 480 I believe (or 240 even? I don't know). My Samsung watch 7 is especially bad, I can literally see it flicker, it's terrible. I take it for granted because a smartwatch isn't something you spend hours staring at. But a phone with that frequency would be unusable for me.
Ps the reason DC dimming isn't used so much is because at least with white LEDs the color temperature tends to change when the DC level changes so it's complicated to calibrate the screen accordingly. In particular the screen gets warmer at lower settings. This can actually be welcome because these settings will be used more at night and a lot of people prefer warmer settings then these days. But it's something that the user should be able to control.
Ps the reason DC dimming isn't used so much is because at least with white LEDs the color temperature tends to change when the DC level changes so it's complicated to calibrate the screen accordingly. In particular the screen gets warmer at lower settings. This can actually be welcome because these settings will be used more at night and a lot of people prefer warmer settings then these days. But it's something that the user should be able to control.
Not sure if this applies to oled too though.