Just to make the discussion even less useful

there's this:
https://androidcommunity.com/tcl-rol...uced-20210111/
"The NXTPAPER technology brings the TCL NXTPAPER tablet. It comes with a large 8-inch Full HD screen that looks a bit like paper. It can still
show full colors and allow smooth playback of videos. ... The screen
doesn’t show any blue light, artificial backlighting, or flickering." (emphasis mine).
This is after a photo of the screen with, gasp, blue stuff showing on it.