Academic literature on the topic 'Luminance uniformity'
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Journal articles on the topic "Luminance uniformity"
Xu, Xiu Zhi, Yong Mao Feng, Shu Fan Wang, and Ping Juan Niu. "Study on Luminance Uniformity Correction for the LED Flat Panel Display." Advanced Materials Research 301-303 (July 2011): 298–302. http://dx.doi.org/10.4028/www.scientific.net/amr.301-303.298.
Full textBhattacharya, Sourin, Suddhasatwa Chakraborty, and Susanta Ray. "An Approach To Comparative Simulation Of Road Lighting and Estimation Of Associated Quality Parameters." Light & Engineering, no. 01-2021 (February 2021): 77–87. http://dx.doi.org/10.33383/2020-058.
Full textZou, Feng, and Shan Chen. "Problems about the Evaluating System of the Pixel Luminance Uniformity of LED Display Using a Digital Camera." Applied Mechanics and Materials 103 (September 2011): 361–65. http://dx.doi.org/10.4028/www.scientific.net/amm.103.361.
Full textKawashima, Y., T. Nagai, and Y. Yamauchi. "Uniformity perception for stimulus with luminance gradient." Journal of Vision 14, no. 15 (December 29, 2014): 66. http://dx.doi.org/10.1167/14.15.66.
Full textJeong, Kyeong Ah, Chanyang You, and Hyeon‐Jeong Suk. "Preference for luminance uniformity of refrigerator lighting." Color Research & Application 46, no. 1 (September 17, 2020): 146–54. http://dx.doi.org/10.1002/col.22571.
Full textYoomak, Suntiti, and Atthapol Ngaopitakkul. "The Study of Lighting Quality of LED and HPS Luminaires Based on Various Road Surface Properties." E3S Web of Conferences 72 (2018): 01005. http://dx.doi.org/10.1051/e3sconf/20187201005.
Full textLiao, Hsing-Yuan, Sheng-Yen Chen, Hien-Thanh Le, Wei-Lun Gao, Fu-Chun Chang, Chan-Chuan Wen, Yi-Chin Fang, Chao-Hsien Chen, Shun-Hsyung Chang, and Hsiao-Yi Lee. "Design and Prototyping of Efficient LED Counter Beam Light with Free-Formed Surface for Meeting International Tunnel Lighting Standards." Energies 14, no. 2 (January 18, 2021): 488. http://dx.doi.org/10.3390/en14020488.
Full textWang, Hengjie, Rui Fan, Chunlai Sun, Xiaoning Zhang, Taijun Hwang, and Limin Wang. "19.2: OLED Lifetime Improvement Based on Optimization of Luminance Compensation Considering Luminance Uniformity." SID Symposium Digest of Technical Papers 49 (April 2018): 202–5. http://dx.doi.org/10.1002/sdtp.12681.
Full textChen, Yen Lung, Zhi Ting Ye, Wei Lai, Chang Che Chiu, Kuo Wei Lin, and Pin Han. "Application of Mini-LEDs with Microlens Arrays and Quantum Dot Film as Extra-Thin, Large-Area, and High-Luminance Backlight." Nanomaterials 12, no. 6 (March 21, 2022): 1032. http://dx.doi.org/10.3390/nano12061032.
Full textPfeiffer, P., X. D. Zhang, D. Stümmler, S. Sanders, M. Weingarten, M. Heuken, A. Vescan, and H. Kalisch. "Backside Contacting for Uniform Luminance in Large-Area OLED." MRS Advances 2, no. 42 (2017): 2275–80. http://dx.doi.org/10.1557/adv.2017.175.
Full textDissertations / Theses on the topic "Luminance uniformity"
Larsson, Klara, and Markus Sarah Lindeskog. "Att Ljussätta Ett Rum : En ljusstudie och ljussättning av en sjukgymnastikavdelning." Thesis, KTH, Byggvetenskap, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-174184.
Full textLight affects humans psychologically and physically, despite this the lighting requirements does not pay regard to the environmental characteristics that light contributes with. A specific light in combination with a specific color and material affects the human being in different ways. The lighting requirements only takes the technical aspects into account. In this project consideration will be given to how the light aesthetic affects the well-being. In this project two rooms will be processed, a waiting room as well as a room meant for rehabilitation. The rooms are placed in a building that includes physiotherapy at Södersjukhuset in Stockholm. The rooms have participated in a light study to create a light environment that is adjusted to its purpose as well as it is pleasantly perceived. Some differences between this lighting project and an actual lighting project have been compared. To perform this light study, various calculations have been done in the lighting planning software RELUX. Light can not solely be simulated with computer software, therefore physical models have been built to analyze the choice of color temperature. Visits to physiotherapy practices and training facilities have been done for inspirational purposes. Interviews with physiotherapists have also been done to reach a better understanding of what factors are needed to be taken under consideration while planning the lighting. Literature studies have been made to get a deeper knowledge in how light reacts in different environments. The lighting planning has resulted in an even lighting in both rooms. The requirements for lighting according to SS-EN 12464-1:2011 have been fulfilled. The different color temperatures of the light sources have been determined regarding the colors of the rooms, warm white in the waiting room and neutral in the rehabilitation room. Armatures with up and down lights have been chosen with the purpose of decreasing glare luminary differences. Downlights have been chosen to lighten up the walls and various objects. To create an uplifting atmosphere in the room, decor lighting have also been used. The conclusion of this work has shown that it is important to take luminance uniformity, adapt the light and color temperature to the room and its colors and materials into account. It is also important to adapt the light to all the different visual works that can take place in the room.
Oravčok, Ján. "Návrh optického systému LED svítidla." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2021. http://www.nusl.cz/ntk/nusl-442473.
Full textChen, Ming-Chuan, and 陳明湶. "Improvement Of Luminance Uniformity In Direct - Type Backlight Units." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/94956533666360107151.
Full text南台科技大學
電機工程系
95
LCDs (Liquid-Crystal Displays) is one of the most popular electronic products in the information age. It is the reason why there are so many display manufactures devoting many resources into it. However, there are two important issues are always a concern to the display industry, that is luminance and luminance uniformity of a display. It is continuous challenge faced by the backlight manufacturers to improve luminance and luminance uniformity of its products under continuous cost-down pressure in today’s fiercely competing market. In direct-type backlight units (BLUs), the lamps are aligned parallelly with even (or uneven) spacing. This results in “lamp mura”, luminance non-uniformity. Additional, the technical trend, thinness and lightweight, in LCD backlight industry, worsen this problem. In this work, we propose a new concept, beamsplitting going with diffusing, to tackle the problem of luminance non-uniformity in direct-type BLUs. With the implementation of this idea, we expect that the numbers of optical films can be further reduced. The goal of cost-down, thinness, and luminance uniformity can be achieved at one time. In this study, experimental work has been performed by using beam splitters or reflection films with beansplittering capability (DVR and ESR) that will split light proportionally according to specified design case, as well as other optical films (such as up diffuser, bottom diffuser and prism lens) to create a novel direct-type BLU structure. Luminance measurements and analysis are carried out to determine the optimal design parameters for beamsplitters and the other optical film(s). In conclusion, the issue of luminance uniformity had been solved and the goal of thinness is achieved. Two major structures are proposed. For general use, a combination of a beam splitter and a diffuser film will meet the specification. For high-luminance products, instead of beamsplitter, DVR is applied as well as other optical films, including bottom diffuser, prism lens, and up diffuser, to meet the demand in luminance.
Chang, Fu-Xiong, and 張富雄. "Luminance and color uniformity measurement by 2-dimensional CCD array." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/75796917806114212491.
Full text國立聯合大學
光電工程學系碩士班
98
Luminance and color uniformity measurements are very important issues for evaluating the quality of flat panel displays . In this thesis, one charge-coupled device (CCD) camera was used as a measuring tool, combined with DAQ card and software program , one-time acquisitions and analyses could provide the brightness values and color values of all points within the panel. Firstly, one lamp inside an integral sphere was simulated as a light source with more than 98% luminance uniformity, our CCD camera measured the luminance and color values. Based on the results compared with those measured by commercial single-point luminance colorimeter (BM7-A), we made the nonlinear correction of flat-field of camera lens and derived a conversion matrix for color values and gray levels of CCD pixels. Secondly, we set up a standard measurement process. The calibrated CCD camera combined with the LabVIEW software was used as the measurement instruments, the experimental results showed that under the illumination of standard source A, the luminance and chrominance values at the same location could be controlled within ± 3% error range. Finally, this CCD camera system was used for measuring luminance and color values under illuminations of another light sources, the errors were increased as the difference between the optical spectrum of measured light source and standard A source became larger. The main source of errors was from the inaccurate linear transformation matrix between the spectral response of standard CIE XYZ and our camera’s filters.
Lin, Tseng-Yi, and 林增憶. "Effect of luminance uniformity to the perceived safety for indoor hallway." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/86279986138672949738.
Full text逢甲大學
工業工程與系統管理學研究所
100
With the increment of environmental protection consciousness, many countries had begun to discuss the issues of energy conservation and carbon reduction. Lighting, for example, is one of necessary requirements in the human life. In order to make people relieved and relaxed in the environment, lighting must be enough. However, excessive lighting equipments will cause a huge cost of a society. Therefore, how to save the energy and improve lighting efficiency is an important issue now. This research analyzes the effects of total illuminance levels and illuminance uniformity for six types of hallway lighting arrangements by manipulating the numbers of LEDs and the distances between LED lights. The participants assessed the hallway lighting arrangements and then rated on a questionnaire developed for this research with regard to the perceived safety. The experimental results show that the illuminance uniformity has strong impacts to the perceived safety. Two regression models were further developed for forecasting preferences of different lighting distributions. The first one used information obtained by walking through the hallways of different lighting arrangements. Its R square was above 0.570. The other one used information obtained by viewing the hallway lighting arrangements without walkthrough. Its R square was above 0.607.
LIAO, HSIANG-LIN, and 廖翔霖. "Simulation Research of Luminance and Uniformity of a New-Type Lightguide-Diffusive Component." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/52592928009368418398.
Full text國立中央大學
光電科學研究所碩士在職專班
96
This research approach the study of luminance and uniformity characteristics with new invented secondary optical lens, we called it as “lightguide-diffusive component”, with wide emission angle is designed for thin direct LED backlight . The LED backlight module composes ,at least, a part of “light source”, a secondary “lightguide-diffusive component “, a FPC for LED lighting and a new designed micro-structure reflective bottom surface on “lightguide-diffusive component “. Through the new designed lightguide-diffusive component , the emission profile of a single LED is modified to the situations of more illuminant and more uniformity. This new designed secondary optical lens is shaped as module type to cover the LED array results in a more uniform spatial light energy distribution on the emission plane of LED backlight. The new invented in this research thereto being apply the invention-patent of R.O.C.
Chun-MingLu and 盧俊名. "New Pixel Circuit Design for Enhancing Uniformity of Luminance in Full HD AMOLED Displays." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/8b874u.
Full text國立成功大學
電機工程學系
102
Active-matrix organic light-emitting diode displays have many advantages, such as wide-viewing angle, fast response time and excellent color reproducibility. This thesis presents five compensation pixel circuits for use in AMOLED displays to solve the issues including deviations of electrical characteristics of thin-film transistors, such as low-temperature polycrystalline-silicon, amorphous indium-gallium-zinc-oxide technology, and OLED degradation as well as power line I-R drop. The first circuit is utilized of simple 2T1C structure for use in 3D Full HD displays, and it compensates for threshold voltage variation. Howerver, the external swith circuit increases the system costs. Although the second circuit compensates for threshold voltage variation without external swith circuit, it suffers from VDD I-R drop. The third circuit compensates for not only threshold voltage variation but also VDD I-R drop and mobility variation. The previous three circuits are voltage programming LTPS pixel circuits, and the following two a-IGZO pixel circuits are operated with current-biased voltage-programming method. Although the fourth circuit compensates for threshold voltage shift of the driving TFT and the OLED with simple operation, the structure 5T1C is more complex. The last circuit with simple 3T1C structure can also compensate for threshold voltage shift of the driving TFT and the OLED, but the uniformity of luminance would be affected by parasitic resistance and capacitance of SCAN line signals.
Chang, Wei-Chih, and 張瑋志. "Applying Hyperspectral Camera to Measure Chromaticity Coordinate and Luminance Uniformity of Liquid Crystal Displays." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/06147813525613477853.
Full text逢甲大學
光電研究所
96
Color and luminance uniformity are important parameters for evaluating the image quality of liquid crystal displays (LCD). This study presents a hyperspectral imaging system for quick and full-field measurement of these parameters. In the system, a hyperspectral camera, based on a prism-grating-prism dispersing element configuration, and line-scanning technique are utilized to measure and store the intensity as a function of wavelength for each point on the surface of the LCD under test. Therefore the measured spectrograph image is actually a three-dimensional (3D) image. The chromaticity coordinate and luminance distribution of the LCD are then derived from this 3D image. A 21-inch LCD was measured by the hyperspectral camera and a spectroradiometer. Comparing the results obtained with these two different instruments yields that the average deviations of measured luminance, x chromaticity coordinate, and y chromaticity coordinate are around 2 %, 0.001, and 0.006, respectively. In addition to the saving in measurement time, experimental results also show the proposed imaging system can provide more information of the LCD image quality than conventional methods.
Yang, Hsin-Chieh, and 楊欣潔. "Improving luminance and uniformity of light guide panel microstructures by using CO2 laser processing." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/80967255599312675359.
Full text國立中興大學
機械工程學系所
101
The light guide panel is a part of the back light module, which evenly spreads light sources in the liquid crystal display (LCD) to destroy total reflection. Light will be transmitted into the light guide panel and can be reflected, scattered, and refracted appropriately via the micro structure, which allows light to uniformly enter the panel. Therefore, the light guide panel’s material, microstructures and production procedure is always the focus of the study. Unlike the conventional direct screen printing or plastics injection molding method, In this study, we used Carbon dioxide laser (Maximum power 25W) to manufacture PMMA light guide panel, through to set the power, speed and the number of engraving. Design the V-shaped grooves by configure the side angle of inclination (1˚~4˚), fixed depth and pitch (1mm~3mm, increasing range is 0.5mm), by changed the scattered patterns to improve the performance of the light guide panel. And to explore the V-Cut patterns through this processing method that can obtain the best optical illuminance, luminance and uniformity. Look forward to use this relatively rapid manufacturing methods, to find an alternative to the past, expensive and time-consuming manufacturing process. Experimental results show that the enhancement of the optical properties for the light guide panel, at the optical effect of illumination aspect first of all, to change the light guide panel of the flank angle is better than to change the fixed depth. As to the luminance aspect, its can be found that the pattern of the V-shaped grooves in the flank angle of 4˚ or the depth is fixed at 0.8 millimeters, its optical properties is higher. But the result tends to exponential shape decreased, leading to the uniformity lower. In addition, these two properties can be found its match on the small pitch premise, there will get better results.
Lai, Chun-Yen, and 賴俊諺. "Design of Light Guide Plate for Luminance Uniformity of Direct Light Emitting Diode backlight module." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/9mpd95.
Full text國立高雄第一科技大學
光電工程研究所
96
In this thesis, a light guide plate is designed to uniform the light emitted from the light source of LEDs beneath it and form a backlight module which satisfy the requirement of the specification of its kind. The relationship between the structure parameters of light guide plate and the uniformity of luminance is simulated and analyzed by the Advanced System Analysis Program (ASAP) optical software. The suitable parameters are chosen to improve the non-uniformity of luminance. At first, the uniformity of luminance using a not optimized light guide plate for a 32 inches direct backlight module is about 69.25％. After applying the parameters optimization procedure, the uniformity of luminance can be achieved above 85％. Finally, the parameters optimization procedure is applied onto other large scales of backlight modules and proved to be able to obtain the high quality of luminance uniformity as well.
Books on the topic "Luminance uniformity"
Near-eye display visual performance reporting suite. Society for Information Display, 2021. http://dx.doi.org/10.55410/xfsa8270.
Full textChromaticity gamut area calculator. Society for Information Display, 2012. http://dx.doi.org/10.55410/njaw6769.
Full textBook chapters on the topic "Luminance uniformity"
Chen, Jia, Jia-wei Tan, Qing-huai Liu, and Fan-rong Zhang. "Computer Simulation and Calculation for Luminance Uniformity of Straight Line Radiation Sources." In Information Computing and Applications, 750–57. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-25255-6_95.
Full textConference papers on the topic "Luminance uniformity"
Abboushi, Belal, Eduardo Rodriguez-Feo Bermudez, Anne Irvin, Benjamin Feagin, Michael Royer, and Robert Davis. "Examining perceptual luminance uniformity of simulated luminaire patterns." In Light-Emitting Devices, Materials, and Applications XXV, edited by Martin Strassburg, Jong Kyu Kim, and Michael R. Krames. SPIE, 2021. http://dx.doi.org/10.1117/12.2577901.
Full textHelt, Francois. "Proposal for Practical Screen Luminance Uniformity Measurement." In SMPTE Technical Conference. IEEE, 2009. http://dx.doi.org/10.5594/m001309.
Full textLiu, Liying, Feng Zheng, Lingxi Zhu, Ye Li, Kewei Huan, Xiaoguang Shi, and Guojun Liu. "Luminance uniformity of integrating sphere light source." In 2015 International Conference on Optoelectronics and Microelectronics (ICOM). IEEE, 2015. http://dx.doi.org/10.1109/icoom.2015.7398818.
Full textRusu, Alexandru Viorel, Catalin Daniel Galatanu, and Dorin Dumitru Lucache. "Luminance Uniformity Analysis Based on Digital Camera Measurements." In 2020 International Conference and Exposition on Electrical And Power Engineering (EPE). IEEE, 2020. http://dx.doi.org/10.1109/epe50722.2020.9305547.
Full textSakai, Naoki, Yumiko Kishi, Toru Suino, and Makoto Hino. "Method for evaluating the uniformity of projector luminance distribution." In The International Conference on Quality Control by Artificial Vision 2017, edited by Hajime Nagahara, Kazunori Umeda, and Atsushi Yamashita. SPIE, 2017. http://dx.doi.org/10.1117/12.2266919.
Full textSeo, Youngseok, KyungHwan Choi, DongHwan Jung, SinMyung Choi, and SeungHyun Cho. "UNIFORMITY MEASUREMENT METHOD FOR CURVED DISPLAY USING IMAGE LUMINANCE MEASURING DEVICE." In CIE 2017 Midterm Meetings and Conference on Smarter Lighting for Better Life. International Commission on Illumination, CIE, 2018. http://dx.doi.org/10.25039/x44.2017.po36.
Full textBoucher, V., S. Buschmann, F. Greffier, V. Muzet, and S. Voelker. "KEEPING THE BENEFIT OF ILMD’s HIGH RESOLUTION IN MEASURING LIGHTING QUALITY PARAMETERS." In CIE 2021 Conference. International Commission on Illumination, CIE, 2021. http://dx.doi.org/10.25039/x48.2021.op55.
Full textPerperidis, Antonios, Ian Murray, Harry Brash, Alice McTrusty, Lorraine Cameron, Brian Fleck, and Robert Minns. "Correcting LCD luminance non-uniformity for threshold Saccadic Vector Optokinetic Perimetry (SVOP)." In 2013 35th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC). IEEE, 2013. http://dx.doi.org/10.1109/embc.2013.6609830.
Full textYang, Ning, Yi-kai Shi, and Xiao-qing Yuan. "Self-compensated control scheme for improving organic LED luminance uniformity in WSN." In 2013 Cross Strait Quad-Regional Radio Science and Wireless Technology Conference (CSQRWC). IEEE, 2013. http://dx.doi.org/10.1109/csqrwc.2013.6657438.
Full textMazikowski, Adam. "Measurement of luminance and color uniformity of displays using the large-format scanner." In Twelfth Integrated Optics – Sensors, Sensing Structures and Methods Conference, edited by Tadeusz Pustelny and Przemyslaw Struk. SPIE, 2017. http://dx.doi.org/10.1117/12.2282353.
Full textReports on the topic "Luminance uniformity"
Gallimore, J. J., and W. W. Farley. Effects of Spatial Luminance Nonuniformities on Visual-Task Performance and Subjective Uniformity. Fort Belvoir, VA: Defense Technical Information Center, July 1992. http://dx.doi.org/10.21236/ada255989.
Full text