That video is a demo from almost a decade ago, the current generation ones are better, but I couldn’t find a good demo outside of hobbyists rambling.
This is without a doubt the biggest waste of potential I’ve seen in the screen market and the fact no one uses memory lcd type displays for portable displays is a crime which probably involves patents. It has full color, fast refresh rates, low power draws that extend battery lives to months between charges and are just fantastic for things the picture just needs to be decent on.
but e-ink can have a backlight, according to the memory lcd patent, light sources from behind render the whole screen unreadable. I think thats at least part of why its only been used for watches, alongside the high rates demanded by Sharp
E-ink cannot have a backlight, they are opaque so to get a “backlight” they use a front light which could be done for this as well. E-ink has also been famously crippled by high rates and patents which only recently expired which is the cause in the sudden resurgence of interest in e-ink technology.
fair enough, my knowledge of e-ink is limited, I know a lot more about LCD screens.