https://en.wikipedia.org/wiki/Transflective_liquid-crystal_d...
Here it's used on the Adam Tablet that never took off: https://www.youtube.com/watch?v=pGUKHDBoTEc
And Eink seem to me to have a lot of other clear drawbacks which makes it impractical for regular work use cases.
https://en.wikipedia.org/wiki/Transflective_liquid-crystal_d...
Here it's used on the Adam Tablet that never took off: https://www.youtube.com/watch?v=pGUKHDBoTEc