Vibrating Led matrix Volumetric Display (Hologram)

I am designing a new version, with PCB coils,inspired by the flexible coils acutators designs by Carl Bugeja. This version should be much more silent. I still have no idea about the max Z travel. Led array should be much more dense too.

This video shows the feasibility of the project. Resolution, noise, speed, can be improved, but the point here was more a proof of concept. A piece of paper sheet is used as a diffuser to get a better effect.