I'd like to make my own binary watch, and something pretty small. Using surface mount LEDs would work but they use a lot of energy (~30mA a piece for something I'd consider reasonably bright) so there'd have to be a mechanism to "show the time".
Instead of this I'd like to only update my display once per time unit and leave it in a stable state in between - exactly like an e-ink display, thus massively reducing the power requirement.
I only have 6 binary display parts in my design so I really need individual e-ink cells, but I've no idea if this kind of thing even exists!
Does such a component exist? Is this the 'right' line of thinking? Thanks!