A novel three-dimensional (3-D) touchless interactive
display can change color based on the distance of the user’s finger
from the screen by detecting subtle shifts in ambient relative
humidity, according to a new study. The technology may find future
applications in wearable electronics and electronic skins (e-skins)
that artificially mimic human skin’s ability to sense pressure,
temperature, and humidity. While scientists have already developed
a variety of interactive touch displays, most of these involve
variations in the intensity of light emission or chromic reflection
in response to a stimulus rather than changes in color, which can
provide more striking and distinct visual feedback.
3-D touchless interactive display detects finger humidity to
change color
