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Assessing Binocular Central Visual Field and Binocular Eye Movements in a Dichoptic Viewing Condition

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Published on: July 21, 2020

A multi-directional backlight for a wide-angle, glasses-free three-dimensional display.

David Fattal¹, Zhen Peng, Tho Tran

¹Hewlett-Packard Laboratories, 1501 Page Mill Road, Palo Alto, California 94304, USA. david.fattal@hp.com

|March 23, 2013

Summary

Researchers developed a new diffractive backlight for mobile devices, enabling glasses-free, full-parallax 3D images. This technology offers wide viewing angles and high resolution, ideal for portable applications.

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Area of Science:

Optoelectronics
Display Technology
3D Imaging

Background:

Multiview 3D displays offer glasses-free, simultaneous 3D experiences with full motion parallax.
Existing solutions are not optimized for mobile devices due to form factor, resolution, and viewing zone limitations.

Purpose of the Study:

To introduce a novel multi-directional diffractive backlight technology for high-resolution, full-parallax 3D imaging on mobile devices.
To overcome the limitations of current multiview 3D display technologies for portable applications.

Main Methods:

A guided-wave illumination technique using light-emitting diodes (LEDs) and a thin planar transparent lightguide.
Spatially multiplexing pixels for different views and colors, modulated via an external shutter plane.
Demonstration using ink masks and a liquid-crystal display (LCD) for passive and active modulation.

Main Results:

Achieved high-resolution (88-127 pixels per inch) full-parallax 3D images.
Demonstrated a wide viewing zone of up to 90 degrees, with potential for 180 degrees.
Showcased active modulation at 30 frames per second and prototypes with up to 200 views.

Conclusions:

The developed diffractive backlight technology enables high-quality, glasses-free 3D on mobile devices.
This innovation addresses key challenges in portability, resolution, and viewing angle for 3D displays.
The technology holds promise for next-generation mobile augmented and virtual reality experiences.