|Three scenarios of operating with NailDisplay. (a) NailDisplay
allows users to select small targets precisely with their fingertips becoming
transparent. (b) NailDisplay helps users learn imaginary interface
and reassure a function (e.g., play music) when their memory of the interface
becomes unclear. (c) Users can switch to the next music selection
by swiping their fingers rightward with NailDisplay.
||Use of a screen less music player. (a) Users switch from the
album to the artist mode by swiping the finger against the device edge,
and (b) navigates through artists by moving the finger along the device.|
|NailDisplay prototype, which consists of a 0.96¡¨ OLED display
module, ATmega32U4 microprocessor, and sensors such as a 6DOF IMU
and a vibrator, depending on the experimental applications
||Resulting screen on the fingernail, which is 5mm-thick. The
prototype is combined with an adjustable finger ring, allowing for easy
use. The portion around the fingertip is left open for native haptics.|
|(a) Use of NailDisplay to type on a virtual keyboard by revealing
the key of press. (b) The occluded content shifts to NailDisplay,
allowing users to point to a small target. Notably, in this application, a
watch size screen is simulated on a large touch screen.
||Positioning of invisible virtual buttons in line along the arm.
(a) Users acquires the latest weather conditions by tapping on where the
icon is located on their arm. (b) Close up view of NailDisplay.|
|Demonstration of Free Finger Interaction. (a) The user checks
the caller¡¦s name with NailDisplay, and (b) answers the call by swiping
the finger rightward.