- 标题
- 摘要
- 关键词
- 实验方案
- 产品
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P-12.5: High Transmittance Color Filter of Hybrid
摘要： The particles of pigment can scatter source light, using a dye reduces the proportion of pigment, so the transmittance was improved nicely. The hybrid color filter also exhibit tuneable emission characteristics, another the hue of dye is better, thus higher purity red, green and Blue (RGB) primary colors be got, the hybrid also can be used in wide-color-gamut products, the transmittance enhance 10%～13% in C-light and 10%～12% in backlight (BL) at the white balance.
关键词： Pigment,C-light,Hybrid,Backlight,Transmission ratio,Color filter,Wide color gamut,Liquid crystal display,Dye
更新于2025-09-23 15:23:52
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Step-shaped electrode for low-voltage and high-optical-efficiency blue-phase transflective liquid crystal displays
摘要： A step-shaped electrode design is proposed for Polymer Stabilised Blue Phase (PSBP) Transflective LCD (TR-LCD). This new electrode design is capable of delivering very high optical efficiency (both T and R) of >95% with operation voltage of ~13 V (or >~90% with ~9 V). The step-shaped electrode helps generate strong horizontal electric fields across the whole cell and suppress the formation of dead zone.
关键词： transflective,Liquid crystal display,step-shaped electrode,blue phase
更新于2025-09-23 15:23:52
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Dynamic operation of liquid crystal cell with inherently nanogroove-featured aligned carbon nanotube sheets
摘要： The use of a highly aligned carbon nanotube (CNT) sheet as a multifunctional constituent for liquid crystal (LC) displays and electro-optic LC applications is assessed. The CNT sheet can perform a dual function: one is an alignment layer for LCs, replacing the commonly used rubbed polyimide film, and the other is a transparent conductive layer, taking the place of indium tin oxide. The hydrophobic treatment improved the adhesion quality between aligned CNT bundles and the glass substrate, which helps to preserve the inherently aligned nanogroove morphology of transparent CNT sheets. The test LC display cells, comprising 4-cyano-4′-pentylbiphenyl molecules sandwiched between CNT-sheet-on-glass substrates, demonstrate the operation characteristics comparable to that of the conventional cell under temperature variation and ac electric field of 1 kHz. The results offer a possibility of deploying multifunctional CNT-sheet alignment layers in LC-based devices, especially in the future flexible display applications.
关键词： Indium-tin oxide transparent conductor,Aligned carbon nanotube sheets,Liquid crystal cells,Polyimide alignment layer for liquid crystal display
更新于2025-09-23 15:22:29
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[ACM Press the 16th ACM SIGGRAPH International Conference - Tokyo, Japan (2018.12.02-2018.12.03)] Proceedings of the 16th ACM SIGGRAPH International Conference on Virtual-Reality Continuum and its Applications in Industry - VRCAI '18 - Arriving light control for color vision deficiency compensation using optical see-through head-mounted display
摘要： Color vision deficiency (CVD), also known as color blindness, is commonly caused by genetic disorder. Unfortunately, as of 2018, there is not yet a cure for the condition. Contact lenses and glasses with color filter are possible solutions to CVD by applying uniform changes to user’s field of view (FoV). On the other hand, optical see-through head-mounted display (OST-HMD) can provide a controllable overlay to user’s FoV, which could help for making a better solution. To calibrate colors in FoV of a user with CVD, methods that often used, such as the daltonization process, need light reduce feature, which makes calibrated color darker. However, recent commercially available OST-HMDs don’t have a controllable way to decrease the brightness of incoming light. In this paper, we present an approach for light subtraction of OST-HMD using a transmissive LCD panel. A prototype system for achieving a controllable overlay to user’s FoV with OST-HMD by using scene camera, user-perspective camera, and the transmissive LCD panel was implemented.
关键词： augmented reality,head-mounted display,color vision deficiency,liquid crystal display
更新于2025-09-23 15:22:29
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A single-cell-gap transflective liquid crystal display with a vertically aligned cell
摘要： A single-cell-gap transflective liquid crystal display with a vertically aligned cell using square ring electrode is demonstrated. The top substrate has a top planar common electrode, a square ring pixel electrode is coated on the bottom substrate, while a bumpy reflector is coated under the bottom substrate. In this device, the planar common electrode and square ring pixel electrode generate a strong longitudinal electric field in the transmissive region (T region) and a weak fringe field in the reflective region (R region). As result, the T and R regions accumulate the same optical phase retardation. The simulation results show that the display exhibits reasonably low operating voltage, high transmittance and well-matched voltage-dependent transmittance and reflectance curves. Besides, fabrication process of the transflective liquid crystal display is very simple.
关键词： square ring electrode,Vertically aligned cell,negative dielectric anisotropy,single-cell-gap,transflective liquid crystal display
更新于2025-09-23 15:21:21
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Silicon Containing Hybrid Copolymers || Construction of Organic Optoelectronic Materials by Using Polyhedral Oligomeric Silsesquioxanes ( <scp>POSS</scp> )
摘要： Organic optoelectronic materials can be generally divided into small molecular weight semiconductors and conjugated polymers with high opto/electronic performance. This interesting electroluminescence and conducting properties were first discovered in the 1970s, but the real surge of the interest occurred in the past 20 years with significant improvements in material performance through creative material design and high material purification. Small molecular weight semiconductors are interesting because of their high purity, ordered structures, and ideal model for fundamental mechanism studies of excitons and charge carriers. Conjugated polymers are mainly used for device fabrication for their advantages of large‐area device fabrication, high performance, and multiple functions. Currently, organic materials receive considerable attention because of their successful applications in organic light‐emitting diodes (OLEDs), solar cell, liquid crystal display (LCD), thin film transistors, sensors, electrochromic devices, and many others. Thanks to the extensive academic and industrial efforts, the mechanism and the relationship between the molecular structure and optoelectronic properties have been illustrated, and various device structures have been developed. Although organic optoelectronic materials have experienced tremendous progress over the past 10 years in fundamental physics and real applications, more work is necessary such as theoretical descriptions in charge generation and transport, distinction in the contributions of various interactions, thermal stability improvement, and commercialization of existing applications. Various new phenomena are still being discovered every day and device performance is continuing to rise. Among these efforts, the incorporation of polyhedral oligomeric silsesquioxanes (POSSs) into organic optoelectronic materials to achieve improved performances has been attracting attention particularly because of the unique and interesting hybrid structures of POSS.
关键词： Electroluminescence,Organic optoelectronic materials,Polyhedral oligomeric silsesquioxanes (POSS),Liquid crystal display (LCD),Electrochromic materials
更新于2025-09-23 15:19:57
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Preparation and Characterization of Semi-Alicyclic Polyimide Resins and the Derived Alignment Layers for Liquid Crystal Display Technology
摘要： Uniform alignment of rigid-rod liquid crystal (LC) molecules under applied voltage is critical for achievement of high-quality display for thin-film transistor-driven liquid crystal display devices (TFT-LCDs). The polymeric components that can induce the alignment of randomly aligned LC molecules are called alignment layers (ALs). In the current work, a series of organo-soluble polyimide (SPI) ALs were designed and prepared from an alicyclic dianhydride, hydrogenated 3,3',4,4'-biphenyltetracarboxylic dianhydride (HBPDA), and various aromatic diamines, including 4,4'-methylenedianiline (MDA) for SPI-1, 4,4',5,5'-aminodianiline (NDA) for SPI-2, 3,3',5,5'-tetramethyl-4,4'-diaminodiphenylmethane (TMMDA) for SPI-3, and 3,3',5,5'-diethyl-4,4'-diaminodiphenylmethane (DMDEDA) for SPI-4. The derived SPI resins were all soluble in N-methyl-2-pyrrolidone (NMP). Four SPI alignment agents with the solid content of 6 wt.% were prepared by dissolving the SPI resins in the mixed solvent of NMP and butyl cellulose (BC) (NMP/BC = 80:20, weight ratio). Liquid crystal minicells were successfully fabricated using the developed SPI varnishes as the LC molecule alignment components. The SPI ALs showed good alignment ability for the LC molecules with the pretilt angles in the range of 1.58°–1.97°. The LC minicells exhibited good optoelectronic characteristics with voltage holding ratio (VHR) values higher than 96%. The good alignment ability of the SPI ALs is mainly attributed to the good comprehensive properties of the SPI layers, including high volume resistivity, high degree of imidization at the processing temperature (230 °C), good rubbing resistance, good thermal stability with glass transition temperatures (Tgs) higher than 260 °C, and excellent optical transparency with the transmittance higher than 97% at the wavelength of 550 nm.
关键词： alignment layer,semi-alicyclic polyimide,thin-film transistor-driven liquid crystal display device (TFT-LCD),residual direct circuit voltage,voltage holding ratio
更新于2025-09-19 17:13:59
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[IEEE 2019 18th International Conference on Optical Communications and Networks (ICOCN) - Huangshan, China (2019.8.5-2019.8.8)] 2019 18th International Conference on Optical Communications and Networks (ICOCN) - Comparative Study on the Influence of Quantum Dot Display and Liquid Crystal Display on Human Visual Function
摘要： Previous studies have shown that liquid crystal display (LCD) can cause visual fatigue to the human eye, but the effect of quantum dot (QD) display has not been explored yet. This study conducted a human factor experiment on the QD display and LCD. The parameters ACC, HOAs and MTF were selected as objective physiological indicators for visual quantification of visual fatigue. 39 participants performed a 45-minute video viewing task. While before and after the visual task, measured the physiological parameters of the participants' eyes. Analysis the effects of QD display and LCD on human physiological characteristics under the same conditions. The results show that: (1) The QD display and LCD have an influence on the physiological characteristics of the human eye during continuous visual task duration. These effects can be quantified by changes in human eye physiological parameters; (2) The effect of QD display on human eye physiological parameters is less than LCD: the VICO index (visual comfort index) is lower, and the participants' color feedback accuracy is higher. This study provides theoretical basis and data support for the subsequent development of quantum dot display.
关键词： Quantum dot display,Human eye physiological characteristics,Visual comfort index,Liquid crystal display,Human factor experiment
更新于2025-09-16 10:30:52
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Green and red phosphor for LED backlight in wide color gamut LCD
摘要： Wide color gamut (WCG) backlight for liquid crystal display (LCD) utilizing white light-emitting diodes (LED) has attracted considerable attention for their high efficiency and color reduction. In this review, recent developments in crystal structure, luminescence and applications of phosphors for wide color gamut LED backlight are introduced. As novel red phosphors, Mn4+ activate fluoride and aluminate phosphors are advanced in quantum efficiency, thermal quenching and color saturation for their characteristic spectrum with broad excitation band and linear emission. The crystal structure and fluorescence properties of Mn4+ doped fluosilicate, fluorogermanate, fluotitanate, as well as Sr4Al14O25, CaAl12O19 and BaMgAl10O17 phosphors are discussed in detail. A serial of narrow-band red-emitting Eu2+, Eu3+ and Pr3+-doped nitride silicates and molybdate phosphors are also introduced. Rare-earth-doped oxynitride and silicate green-emitting phosphors have attracted more and more attention because of the wide excitation, narrow emission, high quenching temperature, high quantum efficiency, such as β-sialon:Eu2+, Ba3Si6O12N2:Eu2+, MSi2O2N2:Eu2+ (M=Ca, Sr, Ba), γ-AlON: Mn2+ and Ca3Sc2Si3O12:Ce3+. All above phosphors demonstrate their adaptability in wide color gamut LCD display. Especially for Mn4+ doped fluosilicate red phosphor and β-sialon: Eu2+ green phosphor. To achieve an ultra-high color gamut in white LED backlight and against the OLED, innovative narrow-band emission red and green phosphor materials with independent intellectual property rights are continuously pursed.
关键词： Rare earths,Liquid crystal display,Backlight,Wide color gamut,White LED,Phosphor
更新于2025-09-12 10:27:22
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15.1: <i>Invited Paper:</i> Bonding Spacer Technologies for Future Foldable LCDs using Ultra-Thin Polyimide Substrates
摘要： We have developed foldable LCD using ultra-thin polyimide substrates and bonding polymer spacer and successfully achieved small curvature of radius less than 2mm. We discuss the bonding spacer can suppress the deformation of plastic substrate and achieve high image quality in bending state.
关键词： Polyimide substrate,Small radius of curvature,Foldable LCD,Bending stress,Bonding spacer,Liquid crystal display
更新于2025-09-09 09:28:46