Bi-directional nanorod LEDs enable non-contact gesture recognition

With new LED arrays capable of both emitting and capturing light, next-generation mobile devices may be able to respond to touchless gestures while self-charging from ambient light.

Made from tiny nanorods and encased in a thinnest film, LEDs will have new interactive features and capabilities. This was reported by researchers at the University of Illinois and Dow Electronic Materials.

Tiny nanoparticles only a few nanometers in size are made up of three different materials. The first emits and absorbs ambient light, while the other two are responsible for passing the charge through it. Their combination allows LEDs to emit and capture light.

Nanorod LEDs perform both functions, instantly switching from one mode to another. Moreover, this happens at a speed that the human eye does not even have time to react to. LEDs continuously capture and absorb light, and the LED display can be configured to respond to light signals in several ways.

For example, he will be able to automatically adjust the brightness with pixel precision, as well as respond to the approach of a finger. These features can be further integrated into interactive displays that respond to touchless gestures. In addition to user interaction, such displays will be able to interact with each other like large parallel communication systems.