"Holographic" Displays Made from LED Fan Blades

This is a “holographic” display made of fan blades:

Listen beautiful relax classics on our Youtube channel.

Each blade contains hundreds of LEDs:

Here’s an explanation of how it works:

And here’s a demonstration model from HyperVSN, one of the larger players in the space, with each individual fan costing upwards of $3,000:

The thing no one mentions in any of the videos is: How noisy is the thing? Then again, since fans moving at a steady rate produce a predictable soundwave, I suppose it would be easy enough to rig up a noise-canceling speaker.

Source: core77

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