Qingtian Zhang, Yongtian Wang, Yue Liu, Weitao Song
{"title":"Design of a stray-light-free waveguide near-eye display using a pin-mirror array and multiple thin plates","authors":"Qingtian Zhang, Yongtian Wang, Yue Liu, Weitao Song","doi":"10.1002/jsid.2037","DOIUrl":"10.1002/jsid.2037","url":null,"abstract":"<p>It has been proved that waveguide near-eye displays with a pin-mirror array can extend the depth of field (DOF) for part of field of view (FOV), which can alleviate the vergence-accommodation conflict (VAC) to a certain extent. During the usage, stray light has been treated as a pivotal factor affecting the image display quality of this waveguide structure, leading to image ghosting or flipping problems. In this paper, we propose a stray-light-free waveguide near-eye display using a pin-mirror array and multiple thin plates. A two-step optimization method has been used to eliminate stray light. Firstly, the effects of the parameters of near-eye displays have been investigated, such as eye relief, pin-mirror size, and spacing size; further, the position and range of total reflection on the front and rear surfaces of the waveguide for the residual stray light are quantitatively analyzed. According to the position and range of the total reflection, multiple thin plates can be introduced to optimize the stray-light paths. To minimize the proportion of stray light in the eye box, the thickness and height of the plates can be optimized. Finally, a compact waveguide near-eye display with stray-light ratio below 0.1% across the eye box is obtained, which can effectively improve the display quality of virtual image. To verify the effectiveness of the method, image simulation was performed, and the results are consistent with the analysis. This method can also improve the vertical FOV while eliminating the stray light, which is very helpful to improve the performance of this kind of waveguide structure.</p>","PeriodicalId":49979,"journal":{"name":"Journal of the Society for Information Display","volume":"33 6","pages":"746-757"},"PeriodicalIF":2.2,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144635464","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The influence of screen size and scene on viewing experience for autostereoscopic 3D display","authors":"Qin Wang, Hui Cheng, Pu-Cha Song","doi":"10.1002/jsid.2041","DOIUrl":"10.1002/jsid.2041","url":null,"abstract":"<p>The visual experience of viewing three-dimensional (3D) content is dependent on parallax and screen size. A 5x4x2 completely within-subject design was conducted in this study through a subjective assessment experiment. A total of 50 subjects viewed four scenes of 3D video sequences varying at five parallax levels on the autostereoscopic 3D displays of two screen sizes. Each of the overall viewing experiences of perceived depth, perceived image quality, naturalness, and viewing comfort was assessed. As indicated by the results of the experiment, parallax and screen size levels affected all viewing experience factors, whereas scenes only exerted a certain effect on perceived depth, naturalness, and visual comfort. The sensitivity of perceived image quality to parallax variation was lower than other parameters. To be specific, an excessive increase in the depth led to the reduced perceived image quality and visual comfort due to the occurrence of 3D artifacts, which becomes a problem to be solved. Although the large screen outperformed the small screen in perceived depth and naturalness, the small screen led to an improvement in perceived image quality and visual comfort. Moreover, the result confirmed that scene nature can serve as a critical factor for the 3D visual experience.</p>","PeriodicalId":49979,"journal":{"name":"Journal of the Society for Information Display","volume":"33 6","pages":"735-745"},"PeriodicalIF":2.2,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144635007","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jang Hoo Lee, Hyuck-Su Lee, Eun-Seong Yu, Seong-Gyun Kim, Seungjae Moon, Byung Seong Bae
{"title":"Enhancing stretchable display performance: IGZO TFT pixel circuit with luminance compensation","authors":"Jang Hoo Lee, Hyuck-Su Lee, Eun-Seong Yu, Seong-Gyun Kim, Seungjae Moon, Byung Seong Bae","doi":"10.1002/jsid.2036","DOIUrl":"10.1002/jsid.2036","url":null,"abstract":"<p>Despite the flexible form factor advantages of stretchable organic light-emitting diode displays, their luminance diminishes as the area expands. In this study, we introduced and assessed a novel pixel circuit aimed at efficiently compensating for luminance changes resulting from the stretching of the display area. The proposed pixel circuit incorporates a sensing capacitor for compensation, enhancing pixel current to counteract luminance reduction when the pixel expands through stretching. The sensor capacitor's capacitances align with the stretched area, resulting in a 16.9% increase in pixel current with a 10% capacitance rise and a 24.1% increase with a 20% capacitance increase. This observation serves as evidence of the circuit's successful compensation for stretching. Additionally, the proposed pixel circuit can reduce both data and power voltages compared to the conventional one. Consequently, the proposed pixel circuit offers lower power consumption compared to the conventional one.</p>","PeriodicalId":49979,"journal":{"name":"Journal of the Society for Information Display","volume":"33 6","pages":"723-734"},"PeriodicalIF":2.2,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144635459","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Thin and low power 2D backlight module development with white mini-LEDs","authors":"Ryoji Yoshimura, Takuya Nakabayashi, Seitaro Akagawa","doi":"10.1002/jsid.2034","DOIUrl":"10.1002/jsid.2034","url":null,"abstract":"<p>In general, blue LEDs have been used for mini-LED 2D Backlights. However, we have selected to utilize white mini-LEDs and applied our innovative design concept, named Multi-Luminous Structure. This approach has resulted in lower power consumption and a thinner module with 1 LED per zone, making it suitable for mobile products.</p>","PeriodicalId":49979,"journal":{"name":"Journal of the Society for Information Display","volume":"33 4","pages":"274-282"},"PeriodicalIF":2.2,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143787292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Simultaneous pulse amplitude and pulse width modulation in a 6T1M2C pixel circuit enabled by the separate timing control for charge injection and transport in the multimodal transistor","authors":"Eva Bestelink, Radu A. Sporea","doi":"10.1002/jsid.2035","DOIUrl":"10.1002/jsid.2035","url":null,"abstract":"<p>Emerging micro light-emitting diode (microLED) displays promise high brightness, improved lifetime, and high pixel density. However, to achieve the desired color accuracy, microLEDs require constant current driving, which can result in wavelength shift at higher pixel brightness. This presents a challenge for pixel circuit design. The driving scheme must vary the emission duration (i.e., pulse width modulation, PWM) to prevent wavelength shift, and it must also include an element of current magnitude control (pulse amplitude modulation, PAM) for fine tuning. This results in complex signaling, large footprint, and multiple sources of variability arising from the numerous transistors, which together diminish the implementation's efficacy. Here, we present a 6T1M2C pixel circuit, which takes advantage of the properties of the multimodal thin-film transistor (MMT) to achieve PWM and PAM simultaneously, rather than in a hybrid configuration, while also performing threshold compensation. The MMT is the first transistor that allows for separation of injection (current magnitude) from channel conduction state (timing), allowing a higher degree of freedom for designing pixel circuits with lower complexity. This proof-of-concept TCAD implementation demonstrates the benefits of MMT-based simultaneous PWM and PAM circuits, with compact device footprint, reduced circuit complexity, and power-efficient features.</p>","PeriodicalId":49979,"journal":{"name":"Journal of the Society for Information Display","volume":"33 4","pages":"283-293"},"PeriodicalIF":2.2,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jsid.2035","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143787293","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Mei Guo, Haolin Gao, Yue Liu, Weitao Song, Songyue Yang, Yongtian Wang
{"title":"Experimental research on depth perception of comfortable interactions in virtual reality","authors":"Mei Guo, Haolin Gao, Yue Liu, Weitao Song, Songyue Yang, Yongtian Wang","doi":"10.1002/jsid.2030","DOIUrl":"10.1002/jsid.2030","url":null,"abstract":"<p>Virtual reality (VR) displays aim to create highly immersive virtual environments based on the principle of binocular disparity, which reproduces spatial information of virtual scenes through the fusion processing of binocular disparity by the visual system. However, due to the differences between VR displays and real-world scenes, the challenge of rendering in VR displays in a manner that aligns with users' natural depth perception principles has not been fully addressed. In this paper, the virtual image distances (VIDs) of RGB channels in head-mounted display (HMD) were measured and a depth perception experiment based on random dot stereograms (RDS) according to the measured VID values was designed. The depth perception comfort fusion thresholds in VR systems were determined by psychophysical methods, and the results demonstrate that the comfort fusion threshold for uncrossed disparity is significantly lower than that for crossed disparity. Additionally, user interaction performance in the determined virtual depth scenarios showed a 12.94% reduction in reaction time and a 16.86% improvement in accuracy compared to other virtual depths. Our findings provide further understanding of comfortable depth visual presentation in VR displays, which is crucial for enhancing user experience and promoting the widespread adoption of VR technology across various applications.</p>","PeriodicalId":49979,"journal":{"name":"Journal of the Society for Information Display","volume":"33 4","pages":"263-273"},"PeriodicalIF":2.2,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143787006","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Genetic algorithm-based structural optimization of foldable OLED panels","authors":"Qibin Feng, Chen Zheng, Zhe Dong, Yusong Guo, Zi Wang, Guoqiang Lv","doi":"10.1002/jsid.2032","DOIUrl":"10.1002/jsid.2032","url":null,"abstract":"<p>OLEDs are playing an important role in flexible displays, smart wearable, in-vehicle displays, and other fields. Foldable OLED panels consist of multiple layers of film. To ensure the reliability, some key films such as the OLED should be placed on the neutral plane, which is usually achieved by adjusting the thickness of each layer. In this paper, genetic algorithm is introduced to find the optimum configurations of the thickness of each layer. Based on the mathematical express of the stress happening on each film when an OLED panel is folded, the objective function can be defined and the optical thicknesses of some layers can be got. The simulation results show that with such optical thickness configuration, the stresses on key films can effectively reduce. The method proposed in the paper can help improve the folding performance of a foldable OLED panel.</p>","PeriodicalId":49979,"journal":{"name":"Journal of the Society for Information Display","volume":"33 4","pages":"255-262"},"PeriodicalIF":2.2,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143787337","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Zhi-Bo Sun, Zheng-Nan Yuan, Yi-Peng Huo, Yue-Chu Cheng, Alex Yuk Lung Cheung, Valerii Vashchenko, Olena Vashchenko, Abhishek Srivastava, Hoi-Sing Kwok
{"title":"Time-multiplexing method using dual ferroelectric liquid crystal shutters for light field 3D display","authors":"Zhi-Bo Sun, Zheng-Nan Yuan, Yi-Peng Huo, Yue-Chu Cheng, Alex Yuk Lung Cheung, Valerii Vashchenko, Olena Vashchenko, Abhishek Srivastava, Hoi-Sing Kwok","doi":"10.1002/jsid.2033","DOIUrl":"10.1002/jsid.2033","url":null,"abstract":"<p>Ultrafast liquid crystal light valves are extensively utilized in high-refresh-rate displays and light beam control and shaping applications. Ferroelectric liquid crystals, characterized by their ability to achieve microsecon response times when driven by a 5 V voltage, are particularly well-suited for array-type liquid crystal light valves, such as display screens or adjustable liquid crystal gratings. This study employs optimized ferroelectric liquid crystal materials that exhibit high contrast (~1,000:1), ultra-fast response times (<20 μs), and polarity-dependent binary switching at low operating voltages (5 V) to develop an array liquid crystal light valve suitable for time-sequential light field 3D displays. Combined with high frame rate display screen, a naked eye 3D display without resolution loss can be achieved. The challenges associated with the independent control of ferroelectric liquid crystals during array light valve operation were analyzed and resolved, resulting in an array-type ultrafast ferroelectric liquid crystal light valve compatible with conventional liquid crystal driving schemes.</p>","PeriodicalId":49979,"journal":{"name":"Journal of the Society for Information Display","volume":"33 4","pages":"246-254"},"PeriodicalIF":2.2,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jsid.2033","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143787199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Kenichiro Masaoka, Euan Smith, Karl Lang, Brian Berkeley, Johan Bergquist, John Penczek
{"title":"Visualization of reproducible object colors in standard color spaces using the gamut ring intersection","authors":"Kenichiro Masaoka, Euan Smith, Karl Lang, Brian Berkeley, Johan Bergquist, John Penczek","doi":"10.1002/jsid.2031","DOIUrl":"10.1002/jsid.2031","url":null,"abstract":"<p>Object color coverage by output media is necessary to understand the limitations of color reproduction. However, complex shapes exhibited in 3D color spaces can pose challenges. Even if their 3D plot axes are rotated, their shape and size is generally difficult to understand. In this study, the color gamuts of both real and theoretical objects were selected as reference gamuts and compared with a few standard trichromatic color spaces using gamut rings—a 2D visualization method that allows quantification of color capabilities across lightness, chroma, and hue ranges. Additionally, gamut intersections between the standard color spaces and reference object color gamuts were represented proportionally on the rings to facilitate a straightforward evaluation of the color capabilities of the standard color gamuts.</p>","PeriodicalId":49979,"journal":{"name":"Journal of the Society for Information Display","volume":"33 4","pages":"231-245"},"PeriodicalIF":2.2,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jsid.2031","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143787087","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Quantum dots for display: A review of three key milestones","authors":"Seth Coe-Sullivan","doi":"10.1002/jsid.2028","DOIUrl":"10.1002/jsid.2028","url":null,"abstract":"<p>The 2023 Nobel Prize in Chemistry was awarded to Aleksey Yekimov, Professor Louis Brus, and Professor Moungi Bawendi for their pioneering work in the discovery and synthesis of quantum dots (QD). QDs have become a major materials component of modern displays, initially in commercial LCD products starting in 2013 and more recently in a new generation of QD-OLED TVs. The Nobel Prize was given largely for chemistry work done up to and including the 1990s, when LCD TV displays still were a technology of the future. In this review, we will explore three moments in history that led to the current QD commercial display age built on the foundation of the magnificent science of the 1990s that led to the 2023 Nobel Prize in Chemistry.</p>","PeriodicalId":49979,"journal":{"name":"Journal of the Society for Information Display","volume":"33 4","pages":"223-230"},"PeriodicalIF":2.2,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143787014","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}