DSee.Lab's product, the hologram led fan, is a hit recently.
This fan, when it spinning, creates a 3D scene in the air, which wowed the world.
It is believed this hologram display can be used a screen for advertising, education, etc.
It uses POV technique to cast a picture in the air, so that human eyes imagine it as floating in the air.
POV means Persistence of vision, which is explained on wiki: