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Статті в журналах з теми "Dual layer LCD"
Albani, Luigi. "Image-splitting techniques for a dual-layer high dynamic range LCD display." Journal of Electronic Imaging 17, no. 4 (October 1, 2008): 043009. http://dx.doi.org/10.1117/1.3010884.
Повний текст джерелаBadano, Aldo, Hongye Liang, and Luigi Albani. "P-244L: Late-News Poster: Noise and Resolution in a Dual-Layer LCD." SID Symposium Digest of Technical Papers 39, no. 1 (2008): 1537. http://dx.doi.org/10.1889/1.3069451.
Повний текст джерелаGuarnieri, Gabriele, Luigi Albani, and Giovanni Ramponi. "Minimum-Error Splitting Algorithm for a Dual Layer LCD Display—Part I: Background and Theory." Journal of Display Technology 4, no. 4 (December 2008): 383–90. http://dx.doi.org/10.1109/jdt.2008.2001159.
Повний текст джерелаGuarnieri, Gabriele, Luigi Albani, and Giovanni Ramponi. "Minimum-Error Splitting Algorithm for a Dual Layer LCD Display—Part II: Implementation and Results." Journal of Display Technology 4, no. 4 (December 2008): 391–97. http://dx.doi.org/10.1109/jdt.2008.2001748.
Повний текст джерелаWang, Peng, Xinzhu Sang, Duo Chen, and Binbin Yan. "Computational Super-Resolution Full-Parallax Three-Dimensional Light Field Display Based on Dual-Layer LCD Modulation." IEEE Access 8 (2020): 81045–54. http://dx.doi.org/10.1109/access.2020.2989677.
Повний текст джерелаBadan, Aldo, Gabriele Guarnieri, Giovanni Ramponi, and Luigi Albani. "61.4: Quantization in Medical Imaging Displays — Initial Observer Results for a High-Luminance-Range, Dual-Layer LCD." SID Symposium Digest of Technical Papers 40, no. 1 (2009): 923. http://dx.doi.org/10.1889/1.3256948.
Повний текст джерелаFeng Qibin, 冯奇斌, 苏凯 Su Kai, 王梓 Wang Zi та 吕国强 Lü Guoqiang. "基于视角补偿的双层液晶显示图像分割算法研究". Acta Optica Sinica 41, № 10 (2021): 1005001. http://dx.doi.org/10.3788/aos202141.1005001.
Повний текст джерелаMingru, Chen, Guo Xu, Zhang Zehan, and Zhou Lyu. "Study on sustainable defluoridization approaches for rural drinking water treatment in northern China." IOP Conference Series: Earth and Environmental Science 1074, no. 1 (August 1, 2022): 012002. http://dx.doi.org/10.1088/1755-1315/1074/1/012002.
Повний текст джерелаLin, Qi, Yi Li, Ming Xu, Qu Cheng, Hang Qian, Jinlong Feng, Hao Tong, and Xiangshui Miao. "Dual-Layer Selector With Excellent Performance for Cross-Point Memory Applications." IEEE Electron Device Letters 39, no. 4 (April 2018): 496–99. http://dx.doi.org/10.1109/led.2018.2808465.
Повний текст джерелаLwin, Zin Zar, Kin Leong Pey, Nagarajan Raghavan, Yining Chen, and Souvik Mahapatra. "New Leakage Mechanism and Dielectric Breakdown Layer Detection in Metal-Nanocrystal-Embedded Dual-Layer Memory Gate Stack." IEEE Electron Device Letters 32, no. 6 (June 2011): 800–802. http://dx.doi.org/10.1109/led.2011.2131114.
Повний текст джерелаДисертації з теми "Dual layer LCD"
Guarnieri, Gabriele. "High dynamic range images: processing, display and perceptual quality assessment." Doctoral thesis, Università degli studi di Trieste, 2009. http://hdl.handle.net/10077/3121.
Повний текст джерелаThe intensity of natural light can span over 10 orders of magnitude from starlight to direct sunlight. Even in a single scene, the luminance of the bright areas can be thousands or millions of times greater than the luminance in the dark areas; the ratio between the maximum and the minimum luminance values is commonly known as dynamic range or contrast. The human visual system is able to operate in an extremely wide range of luminance conditions without saturation and at the same time it can perceive fine details which involve small luminance differences. Our eyes achieve this ability by modulating their response as a function of the local mean luminance with a process known as local adaptation. In particular, the visual sensation is not linked to the absolute luminance, but rather to its spatial and temporal variation. One consequence of the local adaptation capability of the eye is that the objects in a scene maintain their appearance even if the light source illuminating the scene changes significantly. On the other hand, the technologies used for the acquisition and reproduction of digital images are able to handle correctly a significantly smaller luminance range of 2 to 3 orders of magnitude at most. Therefore, a high dynamic range (HDR) image poses several challenges and requires the use of appropriate techniques. These elementary observations define the context in which the entire research work described in this Thesis has been performed. As indicated below, different fields have been considered; they range from the acquisition of HDR images to their display, from visual quality evaluation to medical applications, and include some developments on a recently proposed class of display equipment. An HDR image can be captured by taking multiple photographs with different exposure times or by using high dynamic range sensors; moreover, synthetic HDR images can be generated with computer graphics by means of physically-based algorithms which often involve advanced lighting simulations. An HDR image, although acquired correctly, can not be displayed on a conventional monitor. The white level of most devices is limited to a few hundred cd/m² by technological constraints, primarily linked to the power consumption and heat dissipation; the black level also has a non negligible luminance, in particular for devices based on the liquid crystal technology. However, thanks to the aforementioned properties of the human visual system, an exact reproduction of the luminance in the original scene is not strictly necessary in order to produce a similar sensation in the observer. For this purpose, dynamic range reduction algorithms have been developed which attenuate the large luminance variations in an image while preserving as far as possible the fine details. The most simple dynamic range reduction algorithms map each pixel individually with the same nonlinear function commonly known as tone mapping curve. One operator we propose, based on a modified logarithmic function, has a low computational cost and contains one single user-adjustable parameter. However, the methods belonging to this category can reduce the visibility of the details in some portions of the image. More advanced methods also take into account the pixel neighborhood. This approach can achieve a better preservation of the details, but the loss of one-to-one mapping from input luminances to display values can lead to the formation of gradient reversal effects, which typically appear as halos around the object boundaries. Different solutions to this problem have been attempted. One method we introduce is able to avoid the formation of halos and intrinsically prevents any clipping of the output display values. The method is formulated as a constrained optimization problem, which is solved efficiently by means of appropriate numerical methods. In specific applications, such as the medical one, the use of dynamic range reduction algorithms is discouraged because any artifacts introduced by the processing can lead to an incorrect diagnosis. In particular, a one-to-one mapping from the physical data (for instance, a tissue density in radiographic techniques) to the display value is often an essential requirement. For this purpose, high dynamic range displays, capable of reproducing images with a wide luminance range and possibly a higher bit depth, are under active development. Dual layer LCD displays, for instance, use two liquid crystal panels stacked one on top of the other over an enhanced backlight unit in order to achieve a dynamic range of 4 ÷ 5 orders of magnitude. The grayscale reproduction accuracy is also increased, although a “bit depth” can not be defined unambiguously because the luminance levels obtained by the combination of the two panels are partially overlapped and unevenly spaced. A dual layer LCD display, however, requires the use of complex splitting algorithms in order to generate the two images which drive the two liquid crystal panels. A splitting algorithm should compensate multiple sources of error, including the parallax introduced by the viewing angle, the gray-level clipping introduced by the limited dynamic range of the panels, the visibility of the reconstruction error, and glare effects introduced by an unwanted light scattering between the two panels. For these reasons, complex constrained optimization techniques are necessary. We propose an objective function which incorporates all the desired constraints and requirements and can be minimized efficiently by means of appropriate techniques based on multigrid methods. The quality assessment of high dynamic range images requires the development of appropriate techniques. By their own nature, dynamic range reduction algorithms change the luminance values of an image significantly and make most image fidelity metrics inapplicable. Some particular aspects of the methods can be quantified by means of appropriate operators; for instance, we introduce an expression which describes the detail attenuation introduced by a tone mapping curve. In general, a subjective quality assessment is preferably performed by means of appropriate psychophysical experiments. We conducted a set of experiments, targeted specifically at measuring the level of agreement between different users when adjusting the parameter of the modified logarithmic mapping method we propose. The experimental results show a strong correlation between the user-adjusted parameter and the image statistics, and suggest a simple technique for the automatic adjustment of this parameter. On the other hand, the quality assessment in the medical field is preferably performed by means of objective methods. In particular, task-based quality measures evaluate by means of appropriate observer studies the clinical validity of the image used to perform a specific diagnostic task. We conducted a set of observer studies following this approach, targeted specifically at measuring the clinical benefit introduced by a high dynamic range display based on the dual layer LCD technology over a conventional display with a low dynamic range and 8-bit quantization. Observer studies are often time consuming and difficult to organize; in order to increase the number of tests, the human observers can be partially replaced by appropriate software applications, known as model observers or computational observers, which simulate the diagnostic task by means of statistical classification techniques. This thesis is structured as follows. Chapter 1 contains a brief background of concepts related to the physiology of human vision and to the electronic reproduction of images. The description we make is by no means complete and is only intended to introduce some concepts which will be extensively used in the following. Chapter 2 describes the technique of high dynamic range image acquisition by means of multiple exposures. In Chapter 3 we introduce the dynamic range reduction algorithms, providing an overview of the state of the art and proposing some improvements and novel techniques. In Chapter 4 we address the topic of quality assessment in dynamic range reduction algorithms; in particular, we introduce an operator which describes the detail attenuation introduced by tone mapping curves and describe a set of psychophysical experiments we conducted for the adjustment of the parameter in the modified logarithmic mapping method we propose. In Chapter 5 we move to the topic of medical images and describe the techniques used to map the density data of radiographic images to display luminances. We point out some limitations of the current technical recommendation and propose an improvement. In Chapter 6 we describe in detail the dual layer LCD prototype and propose different splitting algorithms for the generation of the two images which drive the two liquid crystal panels. In Chapter 7 we propose one possible technique for the estimation of the equivalent bit depth of a dual layer LCD display, based on a statistical analysis of the quantization noise. Finally, in Chapter 8 we address the topic of objective quality assessment in medical images and describe a set of observer studies we conducted in order to quantify the clinical benefit introduced by a high dynamic range display. No general conclusions are offered; the breadth of the subjects has suggested to draw more focused comments at the end of the individual chapters.
XXI Ciclo
1982
McCormack, Oisin. "Advanced Thomson scattering techniques as diagnostics for fusion plasmas." Doctoral thesis, Università degli studi di Padova, 2018. http://hdl.handle.net/11577/3427160.
Повний текст джерелаI contenuti di questa tesi sono stati svolti nella cornice della ricerca globale sulla Fusione nucleare a Confinamento Magnetico (FCM). Il progetto guida per la FCM è ITER (International Thermonuclear Experimental Reactor), in costruzione a Cadarache, nel sud della Francia, e con messa in esercizio prevista per il 2025. ITER è una macchina senza precedenti, che spinge all’estremo i limiti della tecnologia e della scienza in tutti i settori, e il campo della diagnostica di plasma non fa eccezione. Lo scattering Thomson (ST) è una delle diagnostiche più potenti tra quelle disponibili su una macchina a fusione, ed è in grado di misurare con elevata risoluzione spaziale e temporale la temperatura e la densità degli elettroni, misure chiave per lo studio dei plasmi. Sebbene lo ST sia una diagnostica già collaudata e in uso su quasi tutte le macchine a fusione esistenti, anch’esso deve essere migliorato e reso adatto agli esigenti requisiti di ITER. In questo lavoro di tesi sono state esplorate due tecniche di scattering Thomson avanzato che hanno lo scopo di risolvere alcune delle sfide dello ST di ITER attraverso tre esperimenti indipendenti svolti su tre macchine separate. Capitolo 1 fornisce una breve introduzione alla FCM vista come parte della soluzione all’attuale crisi globale dell’energia. Capitolo 2 introduce la teoria generale dello scattering di Thomson e una descrizione delle tecniche avanzate trattate in questo lavoro di tesi. Capitolo 3 descrive l’esperimento di ST con laser duale svolto su RFX-mod, Padova, durante il primo anno di dottorato. Questo è stato per l’autore il primo esperimento svolto con successo su questa tecnica avanzata. Capitolo 4 descrive l’esperimento di ST polarimetrico svolto su JET, Oxford, durante il secondo anno di dottorato. Questo è stato per l’autore il primo esperimento svolto con successo su questa tecnica avanzata. Capitolo 5 descrive l’esperimento di ST con laser duale svolto su LHD, Giappone, durante il secondo anno di dottorato. Questo è stato per l’autore il secondo esperimento svolto con successo su questa tecnica avanzata. Gli esperimenti svolti, descritti in questo lavoro di tesi, dimostrano la fattibilità di queste due tecniche di ST avanzato, mai testate prima, e che sono entrambe di grande interesse per l’applicazione sulla prossima generazione di macchine a fusione.
Tsai, Hsin-Han, and 蔡昕翰. "Improving luminous efficiency and light quality by using ZrO2 nano-particles and dual-layer phosphor structure in white LED with remote phosphor package." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/27956923017659163885.
Повний текст джерела國立交通大學
光電工程學系
100
In this thesis, we successfully fabricate the remote phosphor package in White light-emitting diodes (WLEDs) by pulsed spray coating (PSC) method. The advantages of the remote phosphor packages could effectively reduce the backscattering and exhibit the higher luminous efficiency. However, the yellow ring effect is the serious problem in the remote phosphor packages. Therefore, we developed the two efficient packaging configurations including dual-layer remote phosphor package and ZrO2-type remote phosphor package to obtain the high luminous efficiency and high quality WLEDs First, the dual-layer phosphor structure is demonstrated to enhance the light output in the remote phosphor structure. With inserting the thin silicone layer in the phosphor layer, the utilization of blue light could be enhanced, which leads to the higher luminous flux and provides a color stability of light. Furthermore, the simulation results indicated that more blue rays efficiently trapped in the embedding layer and the absorption probability of phosphor could be enhanced. Meanwhile, the results indicated that the dual-layer structure has the higher intensity in blue and yellow components than the conventional remote phosphor package. Next, the effect of the inhomogeneous angular-dependent CCT in the remote phosphor package has been regarded as the urgent issue to overcome. In this study, the PSC method is employed to spray the ZrO2 nano-particales onto the surface of the conventional remote phosphor structure and Luxeon package in WLEDs to improve the uniformity of CCT distribution. The superior scattering capability of ZrO2 nano-particles not only improve the CCT distribution but also solve the yellow effect.
Книги з теми "Dual layer LCD"
Berend, Ivan T. A Restructured Economy: From the Oil Crisis to the Financial Crisis, 1973–2009. Edited by Dan Stone. Oxford University Press, 2012. http://dx.doi.org/10.1093/oxfordhb/9780199560981.013.0020.
Повний текст джерелаЧастини книг з теми "Dual layer LCD"
Rodabaugh, Karl. "An Ordinary Founder." In North Carolina's Revolutionary Founders, 132–58. University of North Carolina Press, 2019. http://dx.doi.org/10.5149/northcarolina/9781469651200.003.0007.
Повний текст джерелаSmyth, Jonathan. "Introduction." In Robespierre and the Festival of the Supreme Being. Manchester University Press, 2016. http://dx.doi.org/10.7228/manchester/9781526103789.003.0001.
Повний текст джерелаMoloney, Kim. "Becoming The Bank’s DNA." In Who Matters at the World Bank?, 176–200. Oxford University PressOxford, 2022. http://dx.doi.org/10.1093/oso/9780192857729.003.0008.
Повний текст джерелаAlborn, Timothy. "Introduction." In All That Glittered, 1–11. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780190603519.003.0001.
Повний текст джерелаAraújo, Kathleen. "Brazilian Biofuels: Distilling Solutions." In Low Carbon Energy Transitions. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780199362554.003.0009.
Повний текст джерелаDoraiswamy, L. K. "Multifunctional Reactor Engineering." In Organic Synthesis Engineering. Oxford University Press, 2001. http://dx.doi.org/10.1093/oso/9780195096897.003.0034.
Повний текст джерелаZalasiewicz, Jan, and Mark Williams. "Between Greenhouse and Icehouse." In The Goldilocks Planet. Oxford University Press, 2012. http://dx.doi.org/10.1093/oso/9780199593576.003.0009.
Повний текст джерелаТези доповідей конференцій з теми "Dual layer LCD"
Smithwick, Quinn Y. J., and Mark Reichow. "Switching dual layer display with dynamic LCD mask." In IS&T/SPIE Electronic Imaging, edited by Andrew J. Woods, Nicolas S. Holliman, and Gregg E. Favalora. SPIE, 2013. http://dx.doi.org/10.1117/12.2002752.
Повний текст джерелаAlbani, Luigi, Lode De Paepe, Silvio Bonfiglio, Gabriele Guarnieri, and Giovanni Ramponi. "HDR medical display based on dual layer LCD." In 2013 8th International Symposium on Image and Signal Processing and Analysis (ISPA). IEEE, 2013. http://dx.doi.org/10.1109/ispa.2013.6703794.
Повний текст джерелаGuarnieri, Gabriele, Luigi Albani, and Giovanni Ramponi. "Image splitting techniques for a dual layer high dynamic range LCD display." In Medical Imaging, edited by Berkman Sahiner and David J. Manning. SPIE, 2008. http://dx.doi.org/10.1117/12.769692.
Повний текст джерелаQingchen, Liu, and Lu Haiming. "Light Field Display: An Adaptive Weighted Dual-Layer LCD Display for Multiple Views." In 2017 International Conference on Virtual Reality and Visualization (ICVRV). IEEE, 2017. http://dx.doi.org/10.1109/icvrv.2017.00089.
Повний текст джерелаSakamoto, Kunio, and Masayuki Yoshigi. "Dual-views display: dual-layer LCDs enable high-resolution full-screen viewing." In SPIE Optics + Photonics, edited by Andrew G. Tescher. SPIE, 2006. http://dx.doi.org/10.1117/12.675815.
Повний текст джерелаSakamoto, Kunio, and Tsukasa Nishida. "Field lens 3D display: dual-layer LCDs enable to modulate orthogonal polarized illuminations." In SPIE Optics + Photonics, edited by Bahram Javidi, Demetri Psaltis, and H. John Caulfield. SPIE, 2006. http://dx.doi.org/10.1117/12.675811.
Повний текст джерелаTorrealba, Victor A., Alvaro Rey, Geordie Chambers, Michael Goodman, and Andrew Kubitza. "Reservoir Simulation Framework to Evaluate the Potential Benefit of Radial Jet Drilling Technology Accounting for the Risk of Irreversible Radial Collapse." In SPE Western Regional Meeting. SPE, 2022. http://dx.doi.org/10.2118/209279-ms.
Повний текст джерелаKrainak, M. A., E. Luzhanskiy, S. X. Li, S. A. Merritt, A. W. Yu, R. Butler, J. Badgley, et al. "A dual format communication modem development for the Laser Communications Relay Demonstration (LCRD) program." In SPIE LASE, edited by Hamid Hemmati and Don M. Boroson. SPIE, 2013. http://dx.doi.org/10.1117/12.2013693.
Повний текст джерелаJadhav, Rajendra S., and Krishna M. Pillai. "Investigation of Heat Transfer and Cure During the Unsaturated Flow in Woven, Stitched and Unbraided Mats." In ASME 2003 Heat Transfer Summer Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/ht2003-47066.
Повний текст джерелаLi, Dachang, Corneliu-Liviu Ionescu, Baurzhan Muftakhidinov, Byron Haynes, and Bakyt Yergaliyeva. "A New Simulation Layer Optimization and Permeability Upscaling Method for Preserving Critical Reservoir Heterogeneity." In SPE Annual Caspian Technical Conference. SPE, 2021. http://dx.doi.org/10.2118/207074-ms.
Повний текст джерела