Researchers have developed the world’s thinnest display, and they call it a “Colloid Display”. Simply put as possible, it “uses ultrasonic sound waves to change the properties of a soap-like film to display both flat and 3-D images – using several of them together can even produce a holographic projection.” Continue reading for a video and more information.
The bubble itself is made of a mixture that’s more difficult to burst than your average dish soap bubble, though soap is a key ingredient. Augmented with colloids, objects can even pierce or pass through the bubble without destroying it. This membrane-like bubble display can be controlled using ultrasonic vibrations that vary its opacity and reflectance, altering the light projected onto the screen.