Autostereoscopic multi-views 3D display system has a narrow freedom of degrees to the observational directions such as
horizontal and perpendicular direction to the display plane than the glasses on type. In this paper, we proposed an
innovative method that expanding a width of formed viewing zone on the depth direction keeping with the number of
views on horizontal direction by using the triple segmented-slanted parallax barrier (TS-SPB) in the glasses-off type of
3D display. The validity of the proposal is verified by optical simulation based on the environment similar to an actual
case. In benefits, the maximum number of views to display on horizontal direction is to be 2<sup>n</sup> and the width of viewing
zone on depth direction is to be increased up to 3.36 times compared to the existing one-layered parallax barrier system.
There is growing interest of displaying 3D images on a smart pad for entertainments and information services. Designing
and realizing various types of 3D displays on the smart pad is not easy for costs and given time. Software simulation can
be an alternative method to save and shorten the development. In this paper, we propose a 3D display simulator for
autostereoscopic smart pad. It simulates light intensity of each view and crosstalk for smart pad display panels.
Designers of 3D display for smart pad can interactively simulate many kinds of autostereoscopic displays interactively
by changing parameters required for panel design. Crosstalk to reduce leakage of one eye's image into the image of the
other eye, and light intensity for computing visual comfort zone are important factors in designing autostereoscopic
display for smart pad. Interaction enables intuitive designs. This paper describes an interactive 3D display simulator for
autostereoscopic smart pad.