I clicked on the article hoping for information on how e-ink displays are illuminated and was (not unsurprisingly) disappointed, but this paper absolutely saves

I clicked on the article hoping for information on how e-ink displays are illuminated and was (not unsurprisingly) disappointed, but this paper absolutely saves it. It's pretty cool to see how they did it and thinking about how it could maybe be DIYed. Do you happen to know whether anyone has attempted such a thing before? I'm not totally clear about the chance of success here, but the 2 main components, clear plastic and a roughed up surface, seem generally DIYable. I very uncertain about the quality, however (since I'm not sure what exact shape the rough spots need to have, I'm basically limited to whatever a laser can make). My greatest fear is that the light won't actually go down onto the screen, but directly into the user's eyes, I guess.