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[IEEE 2018 IEEE International Conference on Imaging Systems and Techniques (IST) - Krakow (2018.10.16-2018.10.18)] 2018 IEEE International Conference on Imaging Systems and Techniques (IST) - Challenges for Electronic Displays in Sterile Medical Devices
摘要： Due to the ongoing digitalization, the demand for additional data is getting more into focus of users and industry. An approach for granting more data and enabling access to additional settings and parameters is since many decades the use of displays. Especially in medical industry, screens became an essential part of the daily work of doctors and medical staff. From patient monitors to blood sugar test devices, displays are present in all shapes and functions. However, these screens are still limited to be used in devices which can’t be sterilized. This is caused by the very harsh conditions of steam sterilizations, the most common type in Europe. Hereby, temperatures up to 135 degree Celsius and 3 bar pressure occur. This work is about the investigation of possible ways to insulate the displays to prevent them from permanent damages due to steam sterilizations and have a look on the possibility of cooling down the modules. For insulation an aerogel based insulation was tested with different LCD, LED and OLED displays. The aim of this research is enabling the use of displays in medical devices which need to be controlled manually and do not give back precise feedback. Therefore, the use of displays could increase safety for patients and usability for doctors significantly.
关键词： sterilization,healthcare,cooling,insulation,displays
更新于2025-09-23 15:22:29
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Transparent Conductive Materials (Materials, Synthesis, Characterization, Applications) || Metallic Oxides (ITO, ZnO, SnO <sub/>2</sub> , TiO <sub/>2</sub> )
摘要： The material class of transparent conductive oxides (TCOs) combines two seemingly contradictory physical properties: high optical transmittance in the visible and near-infrared (NIR) spectral range (like insulators) and high electrical conductivity (like metals). These two key properties make TCO materials very well suited for transparent thin film electrodes for thin film solar cells, flat panel displays, light-emitting devices, or heated windows.
关键词： ZnO,light-emitting devices,SnO2,Transparent Conductive Oxides,thin film electrodes,ITO,solar cells,TiO2,flat panel displays,TCOs
更新于2025-09-23 15:21:21
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[IEEE 2018 27th IEEE International Symposium on Robot and Human Interactive Communication (RO-MAN) - Nanjing, China (2018.8.27-2018.8.31)] 2018 27th IEEE International Symposium on Robot and Human Interactive Communication (RO-MAN) - A Speech-Driven Pupil Response System with Affective Expression Using Hemispherical Displays
摘要： We developed an expressible pupil response interface using hemispherical displays for enhancing human-robot communication. This interface looks like robot’s eyeballs and expresses vivid pupil response by speech input. In particular, the interface can express exaggerated pupil response that human cannot express. In this study, for the basic research of realizing affinitive interaction in human-robot communication, we analyzed the pupil response with affective expression during utterance using a pupil measurement device. On the basis of the analysis result, we developed a speech-driven pupil response system with affective expression using hemispherical displays. This system expresses pupil response with various affective expression by speech input. We carried out an evaluation experiment by using a sensory evaluation with the system acting as the speaker. The result demonstrated that the system with affective expression is effective for enhancing affinitive interaction.
关键词： pupil response,speech-driven system,affective expression,human-robot communication,hemispherical displays
更新于2025-09-23 15:21:21
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Performance Improvement of Gate-Tunable Organic Light-Emitting Diodes with Electron-Transport and Hole-Blocking Layers
摘要： The current density and luminance of gate-tunable organic light-emitting diodes (OLEDs) can be modulated by application of an external gate potential. However, existing gate-tunable OLEDs require further optimization to make them suitable for practical use. In this work, the rapid electron conduction of 4,4’-bis(N-carbazolyl)-1,1’biphenyl (CBP) molecules under low operating potential is demonstrated in polymer electrolyte-coated super yellow (SY) polymer light-emitting diodes (PLEDs). This behavior is attributed to the facile electrochemical n-doping of CBP by the polymer electrolyte infiltrated into the SY PLED through the porous aluminum cathode. The field-modulated conductivity of CBP upon applying an external gate potential to electrolyte-gated (EG) PLEDs is demonstrated. These phenomena lead to the improved performance of EG SY PLEDs with a CBP electron-transport layer and 1,3,5-tris[(3-pyridyl)-phen-3-yl]benzene) (TmpypB) hole-blocking layer between the porous aluminum cathode and SY emissive layer, including low turn-on voltage (1.5 V), low current density leakage (0.01 mA/cm2), low off luminance (<0.01 cd/m2), saturated on-current density (2 mA/cm2) and on-luminance (100 cd/m2), and largely suppressed hysteresis. These results pave the path for practical application of EG OLEDs in displays, especially near-to-eye displays.
关键词： facile electrochemical doping,saturated on-current density and on-luminance,low off-current density leakage and off-luminance,suppressed hysteresis,near-to-eye displays,gate-tunable organic light-emitting diodes,grayscale displaying,porous electrodes
更新于2025-09-23 15:21:01
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Synthesis of Silica-Coated Csa??PbBra?? and Csa??Pb(Br0.4I0.6)a?? Quantum Dots With Long Lifetime and Enhancement in Quantum Efficiency for WLEDs Applications: Lightings With High CRI and Displays With Wide Color Gamut
摘要： To focus on developing white light-emitting diodes (WLEDs) for lightings with high color rendering index (CRI), low correlated color temperature (CCT), and the displays with wide color gamut, inorganic perovskite quantum dots (QDs) such as CsPbX3 (X = Cl, Br, I) were the promising candidate owing to the excellent optoelectronic properties such as high quantum efficiency, narrow emission wavelengths, and tunable emission spectrum. Nevertheless, the CsPbBr3QDs in the form of powders or films had a poor air stability and severe decline of quantum efficiency. Therefore, in this article, a new idea was proposed that 0-D green–red perovskite QDs powders such as Cs4PbBr6 and Cs4Pb(Br0.4I0.6)6 with improved quantum efficiency and long lifetime were first developed by silica-coated method and crystal phase transition in low-temperature synthesis. The quantum efficiency in green Cs4PbBr6 powders could be significantly enhanced from 31.41% to 45.87% and red Cs4Pb(Br0.4I0.6)6 powders was 22.79%. Moreover, the as-prepared perovskite QD powders and commercial YAG phosphors combined with blue chips were applied to high-quality WLEDs for lightings and displays. More importantly, the as-fabricated wide Commission Internationale de l’Eclairage (CIE) color gamut WLEDs for displays possessed 115% National Television System Committee (NTSC) coverage rate and luminous efficiency of 51 lm/W under 20-mA driving current. On the other hand, the constructed WLEDs for high-power lightings would generate a warm white light with a luminous efficiency of 38 lm/W, extremely high CRI of 92.8, and low CCT of 3828 K under 350 mA. Hence, the proposed green–red perovskite QD powders had outstanding potential applications in WLEDs.
关键词： white light-emitting diodes (WLEDs),0-D perovskite quantum dots (QDs),backlights of displays,solid-state lightings
更新于2025-09-23 15:21:01
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[ACM Press the International Conference - San Diego, California (2018.11.05-2018.11.08)] Proceedings of the International Conference on Computer-Aided Design - ICCAD '18 - Strain-aware performance evaluation and correction for OTFT-based flexible displays
摘要： Organic thin-?lm transistors (OTFTs) are widely used in ?exible circuits, such as ?exible displays, sensor arrays, and radio frequency identi?cation cards (RFIDs), because these technologies offer features such as better ?exibility, lower cost, and easy manufacturability using low-temperature fabrication process. This paper develops a procedure that evaluates the performance of ?exible displays. Due to their very nature, ?exible displays experience signi?cant mechanical strain/stress in the ?eld due to the deformation caused during daily use. These deformations can impact device and circuit performance, potentially causing a loss in functionality. This paper ?rst models the effects of extrinsic strain due to two fundamental deformations modes, bending and twisting. Next, this strain is translated to variations in device mobility, after which analytical models for error analysis in the ?exible display are derived based on the rendered image values in each pixel of the display. Finally, two error correction approaches for ?exible displays are proposed, based on voltage compensation and ?exible clocking.
关键词： Organic thin-?lm transistors (OTFTs),performance evaluation,error correction,strain modeling,?exible displays
更新于2025-09-23 15:21:01
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New Impressions in Interaction Design: A Task Taxonomy for Elastic Displays
摘要： Novel shape-changing interfaces promise to provide a rich haptic experience for human-computer interaction. As a specific instance of shape-changing interfaces, Elastic Displays provide large interaction surfaces that can be temporally deformed using force-touch. The unique property of these displays is that they automatically return to their initial flat state. Recently, several review and position papers have stimulated a discussion towards consolidating the knowledge about shape-changing interfaces. The knowledge about Elastic Displays is similarly scattered across multiple publications from recent years. This paper contributes a task taxonomy based on productive uses of Elastic Displays found in literature, on the web, and in our interaction lab. This taxonomy emphasizes tasks, but also encompasses general aspects regarding content types, visualization technology, and interaction styles. All aspects of the taxonomy are illustrated using case studies from literature.
关键词： Task Taxonomy,Organic User Interfaces,Human-computer Interaction,Physics-based Interaction,Shape-changing Interfaces,Interaction Design,Tangible Interaction,Elastic Displays
更新于2025-09-23 15:21:01
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Laser speckle reduction utilized by lens vibration for laser projection applications
摘要： In this paper, a compact speckle reduction method utilizing vibrating lenses for laser beam scanning is proposed and demonstrated. The maximum speckle reduction ef?ciency was found to be 75.6% and 81.25% for a 532 nm diode-pumped solid-state (DPSS) laser and a 520 nm laser diode (LD), respectively. The minimum speckle contrast ratio observed using our method was 0.11 for the DPSS laser and 0.06 for the LD. The proposed method can provide speckle reduction with minimal power requirements, a low implementation cost, and no bending for the optical path of the laser beam. Additionally, this method is promising to withstand high-power lasers for use in high lumen laser projectors by optimizing the lens parameters. The demonstrated technique has a small form factor while simultaneously demonstrating a high degree of speckle reduction, which shows potential for speckle reduction in mini- and pico- laser projector applications.
关键词： pico-projectors,compact method,laser displays,vibrating lens,speckle reduction,mini-projectors,low cost
更新于2025-09-23 15:19:57
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Plasmonic Color Makes a Comeback
摘要： The phenomenon behind the earliest photographs is inspiring new research in color printing and displays. One of the earliest surviving photographs shows the mortuary temple of Pharaoh Ramses II, located in the ancient Egyptian capital of Thebes. The sharp clarity of the image, showing a building with a golden glow framed by a blue sky, gives the impression that it could be a modern snapshot, but the image, now in the Metropolitan Museum of Art, was taken in 1844. Rather than being captured by modern, high-resolution methods, this early photograph, called a daguerreotype, was made by exposing a silver iodide-coated surface to light, creating clusters of elemental silver 1?2 nm in diameter. The image was developed with mercury vapor, forming silver?mercury nanoparticles, which scatter light and create the ?nal scene, embodying a resolution impressive even by today’s standards. Two centuries later, the technology responsible for this earliest of photographs is making a comeback: it is inspiring the next generation of ultra-high-resolution color printing and displays.
关键词： plasmonic color,daguerreotype,displays,nanoparticles,color printing
更新于2025-09-23 15:19:57
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Electrochemical Polymerization: An Emerging Approach for Fabricating High-Quality Luminescent Films and Super-Resolution OLEDs
摘要： Currently, the fabrication of high-resolution OLEDs remains great limitations. Electrochemical polymerization is an efficient way to fabricate conducting polymer films. However, the control of the structures and dedoping of films is difficult, thus making the films rough and incapable with flat-panel devices. In this review, the molecular design and the fabrication of high-quality electrochemical polymerization films and super-resolution RGB displays are introduced. Inspired by the unique electrochemical features of N-alkyl carbazoles, highly luminescent precursors are designed with the spatially separated emissive cores and side carbazoles. The films with low doping levels, high luminescent efficiencies and smooth morphology are prepared by optimizing potential windows, electrolyte solutions, scan rates and post-washing process. The luminous efficiency of OLEDs where the films as light-emitting layers exceeds that of most OLEDs prepared by conventional methods. Then electrocopolymerization and multilayer electropolymerization techniques are developed, in which the components and thickness of films can be precisely controlled, endowing the films and OLEDs with superior stability. Finally, RGB active-matrix OLEDs and super-resolution displays of 2822 ppi are achieved. The above works demonstrate electrochemical polymerization is an emerging technique in RGB super-resolution displays and has great commercial potential.
关键词： OLEDs,Electrochemical polymerization,RGB,N-alkyl carbazoles,super-resolution displays
更新于2025-09-23 15:19:57