- 标题
- 摘要
- 关键词
- 实验方案
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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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Narrow-Band Green-Emitting Sr <sub/>2</sub> MgAl <sub/>22</sub> O <sub/>36</sub> :Mn <sup>2+</sup> Phosphors with Superior Thermal Stability and Wide Color Gamut for Backlighting Display Applications
摘要： The narrow-band emitting phosphors have been extensively investigated in recent years, with the expectation that a wide color gamut of phosphor-converted backlighting device could be fabricated. Due to the weak electric–phonon interaction and low structural relaxation caused by the high rigid crystal structure and symmetric coordination environment, Sr2MgAl22O36:Mn2+ (SMAO:Mn2+) shows a narrow full-width at half-maximum of 26 nm, a high color purity of 81.5%, and a low thermal quenching (82% at 473 K of the initial intensity at 298 K). Using K2SiF6:Mn4+ as the red phosphor, SMAO:Mn2+ as the green one, and GaN-based chip as the blue component, the white light-emitting diode exhibits a National Television Standard Committee value of 127%. All the results demonstrate that the SMAO:Mn2+ phosphor has a promising application in the field of advanced wide-color-gamut backlight display, and the establishment of the relationships between the narrow-band emission and crystal structure can also be applied to design other novel narrow-band phosphors for backlighting technologies.
关键词： color gamut,inorganic phosphors,narrow-band emission,white light-emitting diodes,Sr2MgAl22O36:Mn2+,thermal stability,backlight displays
更新于2025-09-23 15:23:52
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Color Noise Reduction Method in Non-constant Luminance Signal for High Dynamic Range Video Service
摘要： A high dynamic range (HDR) video service is an upcoming industry. For compatibility with legacy devices receiving a non-constant luminance (NCL) signal, new tools supporting an HDR video service are required. The current pre-processing chain of HDR video can produce color noise owing to the chroma component down-sampling process for video encoding. Although a luma adjustment method has been proposed to solve this problem, some disadvantages still remain. In this paper, we present an adaptive color noise reduction method for an NCL signal of an HDR video service. The proposed method adjusts the luma component of an NCL signal adaptively according to the information of the luma component from a constant luminance signal and the level of color saturation. Experiment results show that the color noise problem is resolved by applying our proposed method. In addition, the speed of the pre-processing is increased more than two-fold compared to a previous method.
关键词： non-constant luminance,high efficiency video coding,wide color gamut,High dynamic range
更新于2025-09-23 15:22:29
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A Quantification Procedure for Interior Performance of Architectural Openings Associated with Dye-Sensitized Solar Cells
摘要： Windows with various colors are important design elements used widely ranging from traditional architecture to contemporary buildings to express the architectural fa?ade, the interior atmosphere, and so on. Recently, there is a possibility that solar cells can be used to replace windows with various colors. In particular, attempts to manufacture windows using Dye-Sensitized Solar Cells (DSSCs) are actively underway. Accordingly, there is a need to determine physical and environmental performances of DSSCs. This study attempted a methodological approach to evaluate indoor environmental performance of windows and DSSCs. The concept of color gamut overage normally used in the field of displays was utilized to evaluate color expressions. In addition, a standard visual inspection table suggested by the International Ophthalmological Society was used to evaluate the recognition of shapes. This study compared performances between RGB color windows and DSSCs using the two above previous concepts. Measurement data showed that most DSSCs performed poorly in comparison with architectural color windows. However, some DSSCs showed good enough performances that could be used as alternatives of architectural color windows. Green DSSCs with VLT 18% had a color gamut similar to clear glasses. Blue DSSCs with VLT 18% were found to have similar or better shape recognition than current architectural color windows. Based on these results, limitations of DSSCs as alternatives of architectural color windows and their future development directions are suggested.
关键词： indoor environment,shape recognition,color gamut overage,color environment,dye-sensitized solar cells,architectural window
更新于2025-09-23 15:19:57
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Environmentally Friendly InP-based Quantum Dots for Efficient Wide Color Gamut Displays
摘要： Quantum dots (QD) are regarded as ideal light emitters for current and next-generation displays. Hence, there is an urgent need to produce environmentally friendly QDs that show high efficiency and better color purity. From this perspective, a strategy of tuning the wavelength and spectral width is discussed to optimize the brightness and color space agreement. The critical parameters affecting photophysical properties, such as the uniformity of InP QD core, the thickness and shape of the ZnSe shell, the electron/hole distribution, surface dangling defects, oxidative phase, and the stacking faults in the crystalline structure, are examined. Also, quantitative analyses are suggested to understand the nature of the ligands so that practical applications can be diversified. Recently, the QD-LED using InP-based QDs with controlled shell structure showed a potential of future commercialization. As a further development, it is required to improve the stability via the control of inorganic and organic passivating structures.
关键词： Quantum dots,InP-based,QD-LED,photophysical properties,environmentally friendly,wide color gamut displays,ligand exchange
更新于2025-09-23 15:19:57
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The Virtues of Quantum Dots
摘要： When used in conjunction with LED backlighting, quantum dot technology can make LCD performance meet or exceed that of OLED displays.
关键词： quantum dots,LCD,display technology,OLED,color gamut
更新于2025-09-19 17:13:59
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P‐13.11: A Color Gamut Mapping Reducing the Influence of IR‐drop in OLED Displays
摘要： In this paper, a method of reducing the influence of IR-drop in OLED display for color gamut mapping (CGM) is described. Due to the IR-drop, the parameters can be hardly calculated only by formulas, which make the inaccuracy of CGM. This algorithm uses the IR-drop data of specific gray scale data to find out the IR-drop rule of arbitrary gray scale. The method is easy and accurate to reduce the influence of IR-drop, making the CGM better applied to OLED displays.
关键词： IR-drop,OLED,improvement,data statistics,color gamut mapping (CGM)
更新于2025-09-19 17:13:59
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[IEEE 2019 IEEE International Conference on Distributed Computing, VLSI, Electrical Circuits and Robotics (DISCOVER) - Manipal, India (2019.8.11-2019.8.12)] 2019 IEEE International Conference on Distributed Computing, VLSI, Electrical Circuits and Robotics (DISCOVER) - Improvement of health and well-being of human beings using tunable white LEDs
摘要： With the introduction of the International Telecommunication Union—Radiocommunication Sector (ITU-R) Recommendation BT.2020 (Rec. 2020) color space for ultrahigh de?nition television, the development of wide-gamut displays has become a high priority. To measure the relative gamut sizes of wide-gamut displays, it is herein proposed that the International Commission on Illumination (CIE) 1931 xy chromaticity diagram be used as a practical single metric rather than the nominally perceptually uniform CIE 1976 u'v' chromaticity diagram because of the high correlations between the Rec. 2020 gamut area-coverage ratios in the xy diagram and the volume-coverage ratios in the CIE 1976 L*a*b* and CIE 1976 L*u*v* color spaces. This paper explains why using the perceptually nonuniform xy diagram is counterintuitively appropriate to measure display gamut sizes by presenting a quantitative analysis of the gamut coverage in terms of hue. The argument is made that performing planimetry in the u'v' diagram, whose perceptual uniformity is valid only when the luminance is constant, does not yield accurate display gamut sizes, because the magenta region area is overestimated and the yellow region area is underestimated. Furthermore, some limitations on the use of planimetry for measuring display gamut sizes of multiprimary displays are discussed, and the color light output standard is proposed as a complement to practical planimetry using the xy diagram.
关键词： ultrahigh de?nition television,display gamut size,Chromaticity diagram,Recommendation ITU-R BT.2020,planimetry,wide color gamut
更新于2025-09-16 10:30:52
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Patterned resist on flat silver achieving saturated plasmonic colors with sub-20-nm spectral linewidth
摘要： Plasmonic color generation is a promising field of study that have the potential to produce paradigm-shifts in display and printing technologies. To produce vibrant colors, plasmonic surfaces decorated with complex corrugated or protruding structures have been the commonly adopted strategy for saturated structural color generation. However, it is particularly challenging to cover the full sRGB color gamut due to difficulty in achieving narrowband spectral response via plasmonic structures. Here we report a flat silver film decorated with 90 nm-thick resist nanostructures of low aspect-ratio feature (0.25–0.55). With such a facile and close-to-uniform morphology, we experimentally demonstrate sub-20-nm linewidth of full-width-half-maxima (FWHM) of reflection spectra in the visible range, realizing a color gamut comparable to that of ultra-high definition TV (UHDTV) in the chromaticity diagram. Our work breaks the conventional notion that sophisticated and high aspect-ratio plasmonic and dielectric nanostructures are indispensable, and highly saturated color are impossible for plasmonic nanoprinting. The unique structure enables an etch-free fabrication and recycling recipe, with the potential for mass production by nanoimprinting lithography and other applications including multicolor holographic projection.
关键词： sRGB color gamut,narrowband spectral response,Plasmonic color generation,nanoimprinting lithography,structural color
更新于2025-09-12 10:27:22
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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