Usually the e-ink screens which flash multiple times during an update are tri-color screens; most commonly either black/white/red or black/white/yellow (and ot

Usually the e-ink screens which flash multiple times during an update are tri-color screens; most commonly either black/white/red or black/white/yellow (and other colors are apparently available, but much less commonly seen in the wild!) Every display like that which I’ve used could be put into a display mode where it shows only black/white, which will make updates a lot faster and result in the screen only flashing once per full update. For example, I have a very small black/white/red display which takes about six flashes and 15 seconds to complete a display update, but if I put it into black/white mode (i.e.: disabling support for red), then the update takes less than a second and only one flash. That might be an option for you if you don’t mind giving up the third color!