Featured Invited Session

02. Special Session II: AI for Display

04_02_1827

A Self-Driving Laboratory for the Discovery of Solid-State Organic Laser Emitters

Alán Aspuru-Guzik (Univ. of Toronto, USA)

Abstract

In this talk, I will discuss the progress in building a self-driving laboratory for discovering candidate materials for solid-state organic laser applications. This DARPA-funded project aims to demonstrate closed-loop experimentation and a substantial acceleration in the design cycle of organic materials.

Biography

Alán Aspuru-Guzik’s research lies at the interface of computer science with chemistry and physics. He works in the integration of robotics, machine learning and high-throughput quantum chemistry for the development of materials acceleration platforms. These “self-driving laboratories¨ promise to accelerate the rate of scientific discovery, with applications to clean energy and optoelectronic materials. Alán also develops quantum computer algorithms for quantum machine learning and has pioneered quantum algorithms for the simulation of matter. He is jointly appointed as a Professor of Chemistry and Computer Science at the University of Toronto. Alán is a faculty member of the Vector Institute for Artificial Intelligence. Previously, Alán was a full professor at Harvard University where he started his career in 2006. Alán is currently the Canada 150 Research Chair in Quantum Chemistry as well as a CIFAR AI Chair at the Vector Institute. Amongst other awards, Alán is a recipient of the Google Focused Award in Quantum Computing, the MIT Technology Review 35 under 35, and the Sloan and Camille and Henry Dreyfus Fellowships. Alán is a fellow of the American Association of the Advancement of Science and the American Physical Society. He is a co-founder of Zapata Computing and Kebotix, two early-stage ventures in quantum computing and self-driving laboratories respectively.

04. Special Session IV: AR/VR/MR

01_04_1832

AR/VR Display Systems Research: Hardware, Algorithms, and Vision Science

Douglas Lanman (Facebook, USA)

Abstract

In all their embodiments, modern displays remain largely limited to two-dimensional representations. Correspondingly, our applications, entertainment, and user interfaces must work within the limits of a flat canvas. Head-mounted displays (HMDs) present a practical means to move forward, allowing compelling three-dimensional depictions to be merged seamlessly with our physical environment. As personal viewing devices, head-mounted displays offer a unique means to rapidly deliver richer visual experiences than past direct-view displays that must support a full audience. Viewing optics, display components, rendering algorithms, and sensing elements may all be tuned for a single user. It is the latter aspect that most differentiates from the past, with individualized eye tracking playing an important role in unlocking higher resolutions, wider fields of view, and more comfortable visuals than past displays. This talk will explore such “computational display” concepts and how they may impact VR/AR.

Biography

Douglas Lanman is the director of Display Systems Research at Facebook Reality Labs, where he leads investigations into advanced display and imaging technologies for augmented and virtual reality. His prior research has focused on head-mounted displays, glasses-free 3D displays, light-field cameras, and active illumination for 3D reconstruction and interaction. He received a BS in Applied Physics with Honors from Caltech in 2002 and his MS and PhD in Electrical Engineering from Brown University in 2006 and 2010, respectively. He was a senior research scientist at NVIDIA Research from 2012 to 2014, a postdoctoral associate at the MIT Media Lab from 2010 to 2012, and an assistant research staff member at MIT Lincoln Laboratory from 2002 to 2005. His most recent work has focused on developing Half Dome: an eye-tracked, wide-field-of-view varifocal HMD with AI-driven rendering.

01_04_1796

Recent Advances in Light Field and Holographic Near-eye Displays

Gordon Wetzstein (Stanford Univ., USA)

Abstract

Light field and holographic displays promise unprecedented capabilities for direct-view displays as well as virtual and augmented reality (VR/AR) applications. In this talk, we discuss recent advances to these technologies with a focus on emerging neural holographic displays.

Biography

Gordon Wetzstein is an Assistant Professor ofElectrical Engineeringand, by courtesy, ofComputer ScienceatStanford University. He is the leader of theStanford Computational Imaging Laband a faculty co-director of theStanford Center for Image Systems Engineering. At the intersection of computer graphics and vision, computational optics, and applied vision science, Prof. Wetzstein's research has a wide range of applications in next-generation imaging, display, wearable computing, and microscopy systems. Prior to joining Stanford in 2014, Prof. Wetzstein was a Research Scientist in theCamera Culture Groupat MIT. He received a Ph.D. in Computer Science from theUniversity of British Columbiain 2011 and graduated with Honors from the Bauhaus in Weimar, Germany before that. He is the recipient of an NSF CAREER Award, an Alfred P. Sloan Fellowship, an ACM SIGGRAPH Significant New Researcher Award, a Presidential Early Career Award for Scientists and Engineers (PECASE), an SPIE Early Career Achievement Award, a Terman Fellowship, an Okawa Research Grant, the Electronic Imaging Scientist of the Year 2017 Award, an Alain Fournier Ph.D. Dissertation Award, and a Laval Virtual Award as well as Best Paper and Demo Awards at ICCP 2011, 2014, and 2016 and at ICIP 2016.

05. Active-Matrix Devices

02_05_1799

Low Cost AMOLED/Micro-LED TFT Backplane Technology using LTPS and Oxide Semiconductors

Jin Jang (Kyung Hee Univ., Korea)

Abstract

We developed bulk-accumulation (BA) mode oxide TFTs by electrical connection between bottom and top gates to keep high electron density inside of TFT channel [1-4]. The drain currents of BA TFTs are 3 to 5 times higher than those of single gate, conventional oxide TFT. These are confirmed from ES/BCE inverted staggered and coplanar TFTs.The drawbacks of ELA are high manufacturing cost, very weak under mechanical strain such as rolling and folding. This comes from the small grain size and the protrusions at the grain boundaries which could be easily broken during the folding of the substrate. On the other hand, there is no protrusion in BLA TFT channel so that very stable under mechanical strain.

Biography

Prof of Information Display, Kyung Hee University.

14. OLED Frontplanes

04_14_1800

Transition Dipole Orientation as Key Parameter for Light Outcoupling in Organic and Perovskite LEDs

Wolfgang Brütting (Univ. Augsburg, Germany)

Abstract

The far-field luminescence pattern of photonic nanostructures provides a unique fingerprint of the microscopic light emission process in novel photonic sources, such as fluorescent and phosphorescent organic light-emitting diodes (OLEDs) as well as the emerging class of perovskite nanocrystal LEDs. In particular, the orientation distribution of their optical transition dipole moments (TDMs) is of paramount importance for light outcoupling from these structures.

We demonstrate that such information can be obtained by angular dependent photo- and electroluminescence measurements as well as by back focal plane imaging for both, amorphous organic luminescent guest-host systems and lead halide perovskite nanocrystals of different dimensionality. This information is subsequently used to estimate their performance limits in LEDs.

Biography

Wolfgang Brütting received his Ph.D. in Physics from the University of Bayreuth in 1995 with a work on charge-density wave systems. Thereafter he moved to the field of organic semiconductors where he could take part in the development of organic light-emitting diodes for display applications, e.g. as visiting scientist at the IBM Zurich Research Laboratories during 1998. In 2002 he became Professor for Electrical Engineering at the University of Saarland, before being appointed Professor for Experimental Physics at the University of Augsburg in 2003. His current research activities include charge transport and photophysics of organic semiconductors and their device physics. He has published about 200 journal articles, several book chapters and edited the book Physics of Organic Semiconductors.

04_14_1818

A Comprehensive Model of the Degradation of Organic Light-Emitting Diodes and Application for Efficient Stable Blue Phosphorescent Devices

Jang-Joo Kim (Seoul Nat'l Univ., Korea)

Abstract

We present a comprehensive model to analyze, quantitatively, and predict the process of degradation of OLEDs considering all possible degradation mechanisms, i.e., polaron, exciton, exciton–polaron interactions, exciton–exciton interactions, and a newly proposed impurity effect. The loss of efficiency during degradation is presented as a function of quencher density. The density and generation mechanisms of quenchers are extracted using a voltage rise model. The comprehensive model is applied to stable blue PhOLEDs, and the results show that the model describes the voltage rise and EQE loss very well, and that the quenchers in emitting layer (EML) are mainly generated by polaron-induced degradation of dopants. Quencher formation is confirmed from a mass spectrometry. The polaron density per dopant molecule in EML is reduced by controlling the emitter doping ratio, resulting in the highest reported LT50 of 431 hours at an initial brightness of 500 cd/m2 with CIEy<0.25 and high EQE >18%.

Biography

Jang-Joo Kim is a professor in the Department of Materials Science and Engineering of Seoul National University since 2003. After finishing his PhD at Stanford University, he worked for SRI International as a postdoctor, Electronics and Telecommunications Research Institute as a Senior Member and a Principal Member of Technical Staff, and Gwangju Institute of Science and Technology as a professor before joining to SNU. His current research interests include the electrical and optical processes such as charge injection, transport, recombination, the inter- and intramolecular charge transfer in the excited and ground states, orientation of molecules in amorphous materials, light in-coupling and out-coupling in organic photonic devices such as OLEDs and OPVs. He authored and co-authored over 330 papers and granted more than 60 patents. He is a member of Korean Academy of Science and Technology (KAST) and had served as an Editor of Organic Electronics. He received “The Order of Science and Technology Merit of the Republic of Korea, Changjo (Creation)” in 2019, Dukmyuong-KAST Engineering Awards from KAST in 2013 and Excellence in Research Awards from Seoul National University in 2017.

01_14_1811

Recent Progress in Advanced Blue TADF OLEDs

Chihaya Adachi (Kyushu University, Japan)

Abstract

Organic light-emitting diodes (OLEDs) are one of the most promising devices for next-generation displays and lighting sources. By using thermally-activated delayed fluorescence (TADF) molecules as an emitter for OLEDs, internal electroluminescence (EL) quantum efficiency (IQE) of nearly 100% can be achieved.However, an operational device lifetime of TADF-OLEDs, especially blue-OLEDs, still falls short to use for practical applications. Thus, the quest for a new generation, high-performance blue-OLED is still ongoing. In this talk, we mention our recent two promising strategies for enhancing the device performance of blue TADF-OLEDs.

Biography

Prof. Chihaya Adachi obtained his doctorate in Materials Science and Technology in 1991 from Kyushu University. Before returning to Kyushu University as a professor, he held positions as a research chemist and physicist in the Chemical Products R&D Center at Ricoh Co., a research associate in Shinshu University, a research staff in Princeton University, and an associate professor and professor at Chitose Institute of Science and Technology. He became a distinguished professor at Kyushu University in 2010, and his current posts also include director of Kyushu University’s Center for Organic Photonics and Electronics Research (OPERA) since 2010 and director of the Fukuoka i3 Center for Organic Photonics and Electronics Research since 2013. His research has been concentrated on organic synthesis, device fabrication and optical and electrical device characterization of organic semiconductors. He has been serving an editor of “Organic Electronics” (Elsevier) (2007-2019) and CCS Chemistry (2019-). His publications include over 550 research papers. He won Nishina memorial award (2017).