Problem is not all monitor or TV or even laptop or mobile phone are flicker free even some IPS still have PWM in use today. So, it best to be on look out for one that only use DC rather than PWM. If PWM is high as above 240hz or higher it should be ok. If it is lower than 240hz then its no good. Although smaller device like mobile phone the flicker is much less noticeable than on larger screen. I have no issue problem with Samsung S22U. For PWM thing on tv or monitor I would notice it a lot more and it can be annoying.