...none of which would seem to apply. What's the prior art? It's defiantly non-obvious or someone would have done it decades ago - color screens have been around for a long time.
If you were thinking of something else, I kindly ask you to make a point, instead of asking me to prove a negative.
Color screens have been around a long time, but staring at them all day has only recently become common behavior. And the solution to a problem can be obvious even if the existence of the problem isn't obvious.
If you were thinking of something else, I kindly ask you to make a point, instead of asking me to prove a negative.