alt Hacker News> Isn’t e-paper the general category of low power displays?
Yes, or more precisely: reflective displays without backlight. There were many such display technologies a while ago (when the Kindle took off and various companies tried to compete with E Ink), but most have since been abandoned.
Pretty much all colored e-paper screens have much lower contrast than color printing on paper, since they mix colors by using can conventional RGB sub-pixels and darkening them individually, just like regular lit screens, which reduces the amount of reflected light.
> Pretty much all colored e-paper screens have much lower contrast than color printing on paper, since they mix colors by using can conventional RGB sub-pixels and darkening them individually, just like regular lit screens, which reduces the amount of reflected light.
Isn't that how color images printed paper works, too? We use inks (often in CMYK coloration, but a galaxy of other options exist) to subtract light from what would otherwise be reflected by a plain white paper.
What makes e-paper screens worse in this way?