A new kind of three-dimensional display developed at HP Labs plays hologram-like videos without the need for any moving parts or glasses. Videos displayed on the HP system hover above the screen, and viewers can walk around them and experience an image or video from as many 200 different viewpoints—like walking around a real object.
The screen is made by modifying a conventional liquid-crystal display (LCD), the same kind of display found in most phones, laptops, tablets, and televisions. Researchers hope these 3D systems will enable new kinds of user interfaces for portable electronics, gaming, and data visualization. The work, carried out at HP Labs in Palo Alto, Calif., relies on complex physics to make 3D displays that are as thin as half a millimeter.
Conventional 3D—the type found in movie theaters—provides the viewer with only one perspective. The key to making a multiview 3D display is reproducing all the light rays reflecting off an object from every angle and to get a different image to the left and right eye of the viewer. Some systems for producing multiview 3D images require rapidly spinning mirrors; others use systems of lasers and multiple graphics processors.
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