Nope, the way it's described I'm certain this is electrohydrodynamic jetting. It's been well researched since first discovered in the 60s by G.I. Taylor (IIRC). And it's already used in inkjet systems.

From the description here, sounds like they have 600 of these droplet spray generators mounted in a conical assembly, which they rotate to keep feeding in paint via centrifugal force.

Here is a slow motion video of a system similar to one drop generator. Lots of parameters that Toyota could play with here, like geometry, field configuration, field strength, pressure etc.

https://youtube.com/watch?v=egi0t94wdcc