How do technicians replace a smashed cell phone screen without the underlying liquid crystal stuff leaking out? I’m guessing the liquid is viscous so that the removal of the glass screen doesn’t make stuff come out, but wouldn’t some of the crystals still stick to the underside of the screen?
Wouldn’t it be like a plate of glass put on top of honey or molasses, and you try to remove the glass plate without anything adhering underneath?
The screen is a sandwich, with the LC material in the middle. It’s vanishingly thin - when the screen is smashed, the LC simply stays sandwiched between all the glass shards. The entire screen is replaced as one piece.
ETA: the screen is a modern cell phone is not much thicker than a piece of paper. Even with the backlight and diffuser assembly, the whole thing is well under 1/10" thick.