New Display Method Using Phone Screen Developed

Researchers at the University of Tokyo have developed a full-colour 3D display method that utilises a smartphone screen rather than a laser to create holographic images. With further development, the new method can be used for augmented reality displays.

The new technique, based on computer-generated holography, utilises an iPhone and a spatial light modulator to reproduce a 3D colour image that consists of two holographic layers.

Experimental results showing a continuous transition from the first layer to the second layer.

Although computer-generated holography uses algorithms to produce images, coherent light from a laser is typically required to display these holographic images. The researchers first showed that spatiotemporally incoherent light emitted from a white chip-on-board light-emitting diode could be used. However, this setup required two spatial light modulators – devices that control the wavefronts of light – which is impractical because of their expense.