3M Japan succeeded in creating a technology that allows a 3D TV can display 3D images we can watch it without having to use  special glasses (3D). As we know, that almost all existing 3D TV currently always need 3D glasses so that 3D images can be seen very well and this is where the advantages of technology in which 3M does not need glasses. The secret is in the screen or glass that is precisely designed to display a different current. And 3M ensure that these changes will not reduce at all the quality of the displayed 3D image. This is not a concept because 3M has prepared this technology to produce and now 3M is showing off this technology in 2 pieces LCD with size 2.8-inch and 9 inch.

Source