3D billboard

A 3D billboard does not exists. It is a marketing way by Chinese LED manufacturers to try to sell more LED Walls. They are claiming that their product is having 'Naked eye' 3D image technology. This is a non-existing technology.

What it really is, is a normal LED Wall (with the right specs, like high refresh rate and high grey scale) with great content. This 3D made content (but not rendered as 3D content) gives you a 3D perspective, when seen from the sweet spot. From other viewing angles, it will not give you a 3D perspective. Therefore, it cannot be called a 3D billboard.