Ms. Jana Vanderheijden Profile

Jana Vanderheijden

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Proceedings Article | 14 May 2010 Paper

LED projection architectures for stereoscopic and multiview 3D displays

Youri Meuret, Lawrence Bogaert, Stijn Roelandt, Jana Vanderheijden, Aykut Avci, Herbert De Smet, Hugo Thienpont

Proceedings Volume 7690, 769007 (2010) https://doi.org/10.1117/12.850067

KEYWORDS: Light emitting diodes, Modulation, Visualization, Liquid crystal on silicon, Projection systems, Digital micromirror devices, 3D displays, LED displays, 3D visualizations, 3D image processing

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LED-based projection systems have several interesting features: extended color-gamut, long lifetime, robustness and a fast turn-on time. However, the possibility to develop compact projectors remains the most important driving force to investigate LED projection. This is related to the limited light output of LED projectors that is a consequence of the relative low luminance of LEDs, compared to high intensity discharge lamps. We have investigated several LED projection architectures for the development of new 3D visualization displays. Polarization-based stereoscopic projection displays are often implemented using two identical projectors with passive polarizers at the output of their projection lens. We have designed and built a prototype of a stereoscopic projection system that incorporates the functionality of both projectors. The system uses high-resolution liquidcrystal- on-silicon light valves and an illumination system with LEDs. The possibility to add an extra LED illumination channel was also investigated for this optical configuration. Multiview projection displays allow the visualization of 3D images for multiple viewers without the need to wear special eyeglasses. Systems with large number of viewing zones have already been demonstrated. Such systems often use multiple projection engines. We have investigated a projection architecture that uses only one digital micromirror device and a LED-based illumination system to create multiple viewing zones. The system is based on the time-sequential modulation of the different images for each viewing zone and a special projection screen with micro-optical features. We analyzed the limitations of a LED-based illumination for the investigated stereoscopic and multiview projection systems and discuss the potential of a laser-based illumination.

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