The technology works on a principle
called electrowetting, in which each pixel on the screen consists of tiny capsules of an oil that respond to electrical charge.
Krupenkin's inspiration is a technique
called electrowetting, in which a conductive liquid droplet, placed on an electrode, is physically deformed by an applied electric charge.
A process
called electrowetting could provide 10 watts of juice to smartphones and other gadgets as you walk
This behavior,
called electrowetting, allowed the researchers to manipulate the liquid, expanding and contracting the dark ring to let in more or less light through the clear liquid at the center.