What’s nuts is that this also works on displays without the ability to control luminosity on individual parts of the screen. The link you posted works on my 2020 11” iPad Pro, which has an LCD with no local dimming.
However, it slowly ramps up over a second or two, whereas my OLED iPhone (which can of course set luminosity per pixel) enters retina-searing mode immediately.
What’s nuts is that this also works on displays without the ability to control luminosity on individual parts of the screen. The link you posted works on my 2020 11” iPad Pro, which has an LCD with no local dimming.
However, it slowly ramps up over a second or two, whereas my OLED iPhone (which can of course set luminosity per pixel) enters retina-searing mode immediately.