Hector Martin on Nostr: Everyone can see DLP rainbows if they try, it's a trivial temporal-spatial effect :) ...
Everyone can see DLP rainbows if they try, it's a trivial temporal-spatial effect :) (and it's one reason why my main projector is 3LCD!)
And similarly with 60Hz CRT displays. Effects vary but I think at least a significant subset of the population could tell it apart from higher rates.
The thing is though, both of those cases are about the *whole screen* flickering on/off at a lowish rate (or in the DLP case, specific primaries independently). But temporal dithering is about pixels changing by a small brightness fraction from frame to frame, and the effect is already out spatially so the average screen brightness is constant. So it's a much, much smaller effect.
And similarly with 60Hz CRT displays. Effects vary but I think at least a significant subset of the population could tell it apart from higher rates.
The thing is though, both of those cases are about the *whole screen* flickering on/off at a lowish rate (or in the DLP case, specific primaries independently). But temporal dithering is about pixels changing by a small brightness fraction from frame to frame, and the effect is already out spatially so the average screen brightness is constant. So it's a much, much smaller effect.