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Open AccessArticle

Time-Sequential Working Wavelength-Selective Filter for Flat Autostereoscopic Displays

Department of Vision & Imaging Technologies, Fraunhofer Institute for Telecommunications, Heinrich Hertz Institute HHI, 10587 Berlin, Germany
Department of Chromogenic Polymers, Fraunhofer Institute for Applied Polymer Research IAP, 12489 Berlin, Germany
Department of Precision Coatings, Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP, 01109 Dresden, Germany
Department of Optical and Electrical Coatings, Fraunhofer Institute for Surface Engineering and Thin Films IST, 38108 Braunschweig, Germany
Business Unit Surfaces and Coatings, Fraunhofer Institute for Silicate Research ISC, 97082 Würzburg, Germany
Author to whom correspondence should be addressed.
Appl. Sci. 2017, 7(2), 194;
Received: 15 December 2016 / Accepted: 10 February 2017 / Published: 16 February 2017
(This article belongs to the Special Issue Optical Modulators and Switches)
A time-sequential working, spatially-multiplexed autostereoscopic 3D display design consisting of a fast switchable RGB-color filter array and a fast color display is presented. The newly-introduced 3D display design is usable as a multi-user display, as well as a single-user system. The wavelength-selective filter barrier emits the light from a larger aperture than common autostereoscopic barrier displays with similar barrier pitch and ascent. Measurements on a demonstrator with commercial display components, simulations and computational evaluations have been carried out to describe the proposed wavelength-selective display design in static states and to show the weak spots of display filters in commercial displays. An optical modelling of wavelength-selective barriers has been used for instance to calculate the light ray distribution properties of that arrangement. In the time-sequential implementation, it is important to avoid that quick eye or eyelid movement leads to visible color artifacts. Therefore, color filter cells, switching faster than conventional LC display cells, must distribute directed light from different primaries at the same time, to create a 3D presentation. For that, electric tunable liquid crystal Fabry–Pérot color filters are presented. They switch on-off the colors red, green and blue in the millisecond regime. Their active areas consist of a sub-micrometer-thick nematic layer sandwiched between dielectric mirrors and indium tin oxide (ITO)-electrodes. These cells shall switch narrowband light of red, green or blue. A barrier filter array for a high resolution, glasses-free 3D display has to be equipped with several thousand switchable filter elements having different color apertures. View Full-Text
Keywords: fast switchable wavelength-selective elements; autostereoscopic image splitter; color filter barrier array; computational display; Fabry–Pérot color filter; on-off filter mode fast switchable wavelength-selective elements; autostereoscopic image splitter; color filter barrier array; computational display; Fabry–Pérot color filter; on-off filter mode
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Barré, R.D.; Bartmann, R.; Jurk, S.; Kuhlmey, M.; Duckstein, B.; Seeboth, A.; Lötzsch, D.; Rabe, C.; Frach, P.; Bartzsch, H.; Gittner, M.; Bruns, S.; Schottner, G.; Fischer, J. Time-Sequential Working Wavelength-Selective Filter for Flat Autostereoscopic Displays. Appl. Sci. 2017, 7, 194.

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