Abstract—In this paper, we develop a layered 3D touch screen
using capacitance measurement to detect an object both before
and after contact for operation of a 3D image on the display.
The proposed 3D touch screen employs layered parallel and
plane-type capacitance sensors. The 3D touch screen can detect
indentations and the precise position of an object and can identify
the material in contact with it. In addition, it can detect the object
and its position during noncontact (proximity range). Thus,
the proposed 3D touch screen detects objects in the 3D range.
In this paper, the proposed 3D touch screen is set on a display
and detects objects and their positions before and after contact.
The proposed 3D touch screen has the potential to be used as
functional and useful interface.