Why ask the same question when I have given the links for your answer.
You need to read what's been replied to you.
You eyes cannot see three dimensional from a flat 2d surface without changing your vision with filtering.
LG is currently investigating the use of
Parallax barrier images,
Lenticular technology and
holographic technology in the hope of creating
glasses-free 3D .
Also:
Get past the sponsor ad for the video.
http://www.technologyreview.com/video/?vid=579
.