Scientists from Fraunhofer FEP developped a large-area high-resolution low-power OLED microdisplay with high framerates. The use of these microdisplays in VR glasses can help to avoid motion sickness. The new displays can be seen at awe europe in Munich/ Germany from October 18 to 19, 2018 at booth no. 322.
VR glasses are increasingly popular. Not only are computer fans enthusiastic about them, virtual tours through museums or exhibitions are possible, and prospective purchasers can 'see' the interior of their new car with various color and fabric choices.
However, currently available VR glasses are usually heavy and oversized, while the feeling of “being right in the scene” often changes to a feeling of being on the deck of a boat during heavy swell. This 'motion sickness' is caused partly by low frame rates and flickering of the images, and partly by an inappropriate field of view.
The latest research results from the European funded project LOMID (Large cost-effective OLED microdisplays and their applications) will solve these challenges: Large-area OLED microdisplays, combined with advanced free-form optics provide an ergonomic and lightweight solution for the design of VR glasses, and higher frame-rates will reduce the motion sickness for users.
As part of the project, scientists from Fraunhofer FEP have developed new OLED microdisplays with a size of one inch and a resolution of 1920 × 1200 pixels (WUXGA, 2300ppi) and framerates of 120Hz. Ultra-compact optics, designed by project partner LIMBAK, seamlessly combine two display chips per eye, making four in total for the entire headset. With two WUXGA microdisplays per eye, the headset has a total resolution of 4800 x 1920 pixels, which is close to 5k. This design facilitates very high effective display resolutions and a wide field of view (>100°) for an excellent immersive VR sensation.
Moreover, the optics scientists of LIMBAK have been able to decrease the display-to-eye distance needed in the headset, lowering it to only 37 mm (compared to 60-75 mm in most conventional headsets). This ultra-compact optical design reduces the headset size to about a quarter of the volume and half the weight of a conventional headset while maintaining the same field of view.
Judith Baumgarten, scientist in the IC and System Design department at Fraunhofer FEP explains the design approach taken to reach high framerates and thus reducing motion sickness effects and flickering in VR applications: “To offer such high framerates of 120 Hz and thus high data rates, we have extended the parallel interface of the OLED microdisplays.
The display mode can be configured flexible from hold-type to impulse-type. The latter allows the elimination of motion artefacts and flicker with a special rolling emission mode. The chip also provides special look-up-tables for gamma correction - each channel (red, green, blue, and white) can be calibrated individually. We achieved a superior image quality with a very high contrast ratio of >100'000 : 1 at extraordinary low power consumption. We are very pleased about these positive results of our displays in combination with the ultra-compact optic design of LIMBAK, which enable really compact VR devices.”
The tiling of multiple OLED-on-silicon microdisplays inside the system has helped to reduce its form factor and weight, while increasing resolution to a level not easily achieved by conventional TFT-based AMOLED displays in VR headsets currently due to their typical pixel density limits. This approach also supports keeping yield and thus costs in a reasonable range.
Latter fact of keeping the costs of manufacturing large-area OLED microdisplays in a reasonable range was one of the main goals within LOMID project. Therefore also the partner X-FAB developed economical processes at the CMOS silicon foundry, paying special attention to the interface between the top metal electrode of the CMOS backplane and the subsequent OLED layers. Further on partner Microoled S.A.S. is responsible for the fabrication of the whole OLED microdisplays – the key component for these kinds of VR glasses using those CMOS backplane wafers.
Scientists from Fraunhofer FEP will present a LOMID headset prototype as well as research results during the awe Europe 2018 at booth no. 322, from October 18-19, 2018 at MOC Exhibition Center Munich, Germany.
About the LOMID project:
The LOMID research project, running from January 2015 to June 2018, involves eight partners from five countries. Four of the partners are research institutions or universi¬ties: The Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP has contributed to the microdisplay backplane IC design and prototyping; the University of Leipzig has synthesized materials for transparent oxide transistors; the University of Oxford has addressed vision aid applications; and the French Commissariat à l’énergie atomique et aux énergies alternative (CEA) Leti has developed techniques allowing the displays to be bent. The industrial partners are the X-FAB silicon foundry, respon¬sible for CMOS chip manufacture; MICROOLED, responsible for microdisplay manufacture and commercialisation; Limbak, responsible for the design of high-performance optics, and Amanuensis, supporting project management.
The LOMID project has received funding from the European Union’s Horizon 2020 Research and Innovation Programme under Grant Agreement No 644101. See also: www.lomid.eu
Fraunhofer FEP at awe europe 2018: exhibition booth no. 322
Ms. Annett Arnold
Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP
Phone +49 351 2586 333 | firstname.lastname@example.org
Winterbergstraße 28 | 01277 Dresden | Germany | www.fep.fraunhofer.de
Franziska Lehmann | Fraunhofer-Institut für Organische Elektronik, Elektronenstrahl- und Plasmatechnik FEP
Man versus machine: Can AI do science?
14.01.2020 | Okinawa Institute of Science and Technology (OIST) Graduate University
Beyond 5G lab: Communication technology of the future
13.01.2020 | Friedrich-Alexander-Universität Erlangen-Nürnberg
Styrofoam or copper - both materials have very different properties with regard to their ability to conduct heat. Scientists at the Max Planck Institute for Polymer Research (MPI-P) in Mainz and the University of Bayreuth have now jointly developed and characterized a novel, extremely thin and transparent material that has different thermal conduction properties depending on the direction. While it can conduct heat extremely well in one direction, it shows good thermal insulation in the other direction.
Thermal insulation and thermal conduction play a crucial role in our everyday lives - from computer processors, where it is important to dissipate heat as...
In order to advance the transfer of research developments from the field of quantum sensor technology into industrial applications, an application laboratory is being established at Fraunhofer IAF. This will enable interested companies and especially regional SMEs and start-ups to evaluate the innovation potential of quantum sensors for their specific requirements. Both the state of Baden-Württemberg and the Fraunhofer-Gesellschaft are supporting the four-year project with one million euros each.
The application laboratory is being set up as part of the Fraunhofer lighthouse project »QMag«, short for quantum magnetometry. In this project, researchers...
Microtubules, filamentous structures within the cell, are required for many important processes, including cell division and intracellular transport. A...
Researchers from the University Hospital Zurich, ETH Zurich, Wyss Zurich and the University of Zurich have developed a machine that repairs injured human livers and keep them alive outside the body for one week. This breakthrough may increase the number of available organs for transplantation saving many lives of patients with severe liver diseases or cancer.
Until now, livers could be stored safely outside the body for only a few hours. With the novel perfusion technology, livers - and even injured livers - can now...
A balloon-borne scientific instrument designed to study the origin of cosmic rays is taking its second turn high above the continent of Antarctica three and a half weeks after its launch.
SuperTIGER (Super Trans-Iron Galactic Element Recorder) is designed to measure the rare, heavy elements in cosmic rays that hold clues about their origins...
16.01.2020 | Event News
15.01.2020 | Event News
07.01.2020 | Event News
17.01.2020 | Life Sciences
17.01.2020 | Power and Electrical Engineering
17.01.2020 | Life Sciences