Stereoscopic 3D Glasses-Free Display

Stereoscopic 3D Glasses-Free Display

There are currently 2 types stereoscopic 3D display that don't require the use of glasses. They are known as "Lenticular" and "Parallax Barrier" displays and are both currently only compatible with TV based technology.

Lenticular Display

These displays use a lenticular lens, containing an array of magnifying and refracting lenses known as "Lenticles". They are designed so that when viewed from slightly different angles, different areas of the screen are magnified and refracted towards the viewers eyes. As the average separation between human eyes is 65mm, these lenses are designed so that at each point around the screen different stereoscopic image pairs are directed to the corresponding eyes, creating stereoscopic vision from multiple viewing angles.

Parallax Barrier

A parallax barrier uses a device that consists of a layer of material with a series of precision slits in specific locations that allow each eye to see a different areas of the screen. The main drawback of this technology is that the user must stand in one specific spot to correctly view a stereoscopic image.

Lenticular vs. Parallax Barrier

Unlike Active/Passive displays there are clear uses for each type of "Glasses-Free" stereoscopic 3D display technology. Lenticular screens are used in the public domain, primarily for digital signage as viewers can get the 3D effect from multiple angles. Parallax barrier displays on the other hand are used on smaller devices, such as mobile phones or handheld games consoles where the viewer will be looking at the screen from a relatively fixed viewpoint.

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