Wavelength-selective image separation for autostereoscopic 3D displays
Duration: January 2013 - December 2016
HHI project part
Autostereoscopic parallax barrier displays based on wavelength-selective filters have been investigated rather rarely up to now. Compared to conventional autostereoscopic 3D barrier displays, wavelength-selective displays filter the views for each color separately, the color barriers being arranged with slight local offset. This leads to changes in the light distribution and limits the possibilities of creating well-functioning display designs.
A 3D display design with wavelength-selective filters that has superior barrier characteristics especially maximized light transmission besides minimized crosstalk is not easy to find. Our in-house simulation software enabled us to find fully functional designs by using the implemented smart evaluation algorithms. More than 172.000 wavelength-selective barrier designs were modeled and evaluated involving the respective light ray distribution for the visible views. Some of them are common or superior to autostereoscopic barrier displays.
Finally, we determined the on the best suitable designs. By way of example, it enables us to double the resolution and light emission as compared to a conventional barrier raster of same slant angle and identical period. All main construction parameters were modified by simulation for further optimizing the 3D display design. We built a prototype and investigated its properties. Based on the determined results we outlined the special requirements for practical realization of wavelength-selective display technologies.
tempoDis is a joint research project within Fraunhofer HHI, ISC, IST, IAP, and FEP.
- Micro optics
- glasses-free 3D displays
- optical switches