Journal of the Society for Information Display最新文献

A head-up display (HUD) is conveniently used to provide information on the display without changing the user's gaze. 3D HUDs, capable of projecting three-dimensional information beyond the 2D HUDs, enable the projection of augmented reality (AR) objects into the real world. Research on the perception of 3D AR HUDs is crucial for their efficient utilization and secure commercialization. In this study, we examined whether a 3D HUD is more comfortable than a 2D HUD in the context of viewing real-world environments and augmented reality objects together. Additionally, we analyzed participants' perception of distance and fatigue for AR objects at varying distances from the 3D HUD. The study found that using a 3D HUD in an AR environment resulted in less fatigue than using a 2D HUD, as determined by a Mann–Whitney statistical analysis. Participants were able to match the depth of AR objects in a 3D HUD within a range of 3 to 50 m, with similar diopter and parallax angular distance errors, regardless of the distance of the AR object. Visual fatigue increases with increasing distance from the virtual-image plane and can be modeled as a quadratic function in the domain of diopter and parallax angles.

Building on several decades of research and development, the recent progress in virtual reality (VR) and augmented reality (AR) devices with spatial computing technologies marks a significant leap in human–computer interaction, with applications ranging from entertainment and education to e-commerce and healthcare. Advances in these technologies promise immersive experiences by simulating and augmenting the real world with computer-generated digital content. The core objective of the VR and AR systems is to create convincing human sensory perceptions, thereby creating immersive and interactive experiences that bridge the gap between virtual and physical realities. However, achieving true immersion remains a goal, and it necessitates a comprehensive understanding of the neuroscience of human multisensory perception and accurate technical implementations to create a consistency between natural and synthetic sensory cues. This paper reviews the human sensory-perceptual requirements vital for achieving such immersion, examines the current status and challenges, and discusses potential future advancements.

Fatigued driving is one of the main causes of traffic accidents. In order to improve the detection speed of fatigue driving recognition, this paper proposes a driver fatigue detection method based on multi-parameter fusion of facial features. It uses a cascaded Adaboost object classifier to detect faces in video streams. The DliB library is employed for facial key point detection, which locates the driver's eyes and mouth to determine their states. The eye aspect ratio (EAR) is calculated to detect eye closure, and the mouth aspect ratio (MAR) is calculated to detect yawning frequency and count. The detected percentage of eye closure (PERCLOS) value is combined with yawning frequency and count, and a multi-feature fusion approach is used for fatigue detection. Experimental results show that the accuracy of blink detection is 91% and the accuracy of yawn detection is 96.43%. Furthermore, compared to the models mentioned in the comparative experiments, this model achieves two to four times faster detection times while maintaining accuracy.

Mixed reality technology can be applied to simulation training, improve surgical performance, enhance 3D game experience, and so on, attracting extensive attention of researchers. The perception of the user about head-mounted display MR using HoloLens is critical, especially for precision applications such as virtual hoisting. Designing and adding appropriate depth cues in MR scenes is an effective way to improve users' depth perception. In this study, taking virtual hoisting training system as an example, the depth perception strategy of multi-cue fusion is proposed to improve the perception effect. Based on the mechanism of human depth perception, five kinds of depth cues are designed. The depth perception effect of adding single cue is studied by perceptual matching experiment. Based on the principle of fuzzy clustering, a multiple-cue comprehensive depth optimization strategy on viewing distance scale is proposed. Finally, the perceptual matching results demonstrate the effectiveness of the multi-cue fusion strategy, and the average error is reduced by 20.68% compared with the single-cue strategy, which can significantly improve the spatial depth perception. This research can provide a reference for improving users' depth perception in interactive MR simulation systems.

In field operations with large machines, onsite large task spaces have been typically required. In these cases, remote skilled workers have to provide a step-by-step guide by observing the onsite situation around the large task spaces in three dimensions, instructing onsite unskilled workers on how to perform the tasks with the correct hand gestures at the right position, and switching between observation and instruction frequently during the remote support. In this study, we developed a Metaverse-based remote support system with a seamless user interface for switching between free viewpoint observation and hand gesture instruction. The proposed system enables remote skilled workers to observe the onsite field from any viewpoint, transfer hand gesture instruction to onsite workers, and seamlessly switch between free viewpoint observation and free hand gesture instruction without having to change devices. We compared the time efficiency of the proposed system and a conventional system through experiments with 28 users and found that our system improved the observation time efficiency by 65.7%, the instruction time efficiency by 27.9%, and the switching time efficiency between observation and instruction by 14.6%. These results indicate that the proposed system enables remote skilled workers to support onsite workers quickly and efficiently.

We fabricated a microdisplay with a 1.50-in. organic light-emitting diode (OLED) and a pixel density as high as 3207 ppi. An ideal display with high luminance, low power consumption, an ultrahigh aperture ratio, and a wide color gamut can be fabricated using a metal maskless lithography technology for patterning OLED layers and an oxide semiconductor large-scale integration (OSLSI)/silicon LSI backplane. We designed a virtual reality device that exhibited less ghosting and a field of view of 90° or greater by combining the microdisplay and a novel pancake lens.

As ultra-high-definition displays have gained popularity, mitigating the horizontal crosstalk effect in 8K LCD panels is crucial. High display resolution requires narrower signal line integration, intensifying the coupling effect. Traditional methods like Vcom feedback and increasing analog voltage drain-drain (AVDD) load are slower and less accurate, leading to increased power consumption. In response, we propose an advanced digital signal compensation method. In this study, we developed a predictive model and investigated the intricate relationships among AVDD, Vcom, and storage capacity (Cst) ripples on horizontal crosstalk. Optimizing the ripple change (∆G) by varying the compensation coefficient (a) and decay ratio (τ) significantly reduces crosstalk effects. The digital compensation method allows rapid and precise compensation without delays, reducing horizontal crosstalk in 8K LCD panels from 4% to below 0.9%. This surpasses the requirement of minimizing crosstalk to less than 2%, substantially enhancing the image quality of high-resolution displays.

Ha, J, Lee, S, Park, M, Kim, H, Jung, YK, Han, C, Hwang, J, Park, G, Lee, HJ, Bae, WK, Noh, S, Kwak, D, Kim, S, Yoon, YG, Lee, C Dual ligand exchange of Cd-free quantum dots and optimal control of ink formulation for improving the performance of all-inkjet-printed qunatum dot light-emitting diodes. J Soc Inf Display. 2024; 32(5): 332–340. https://doi.org/10.1002/jsid.1296

In the article title, the word “quantum” was mistakenly misspelled. The correct article title is below.

“Dual ligand exchange of Cd-free quantum dots and optimal control of ink formulation for improving the performance of all-inkjet-printed quantum dot light-emitting diodes”

We apologize for this error.