Relevant bibliographies by topics / RGBW LEDs

Academic literature on the topic 'RGBW LEDs'

Author: Grafiati
Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "RGBW LEDs"

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Song Pengcheng, 宋鹏程, 文尚胜 Wen Shangsheng, and 陈颖聪 Chen Yingcong. "Research on Color Mixing Based on RGBW-LEDs." Acta Optica Sinica 35, no. 9 (2015): 0923004. http://dx.doi.org/10.3788/aos201535.0923004.

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Kalustova, D. O., V. I. Kornaga, A. V. Rybalochka, and S. I. Valyukh. "RGBW lighting systems: Influence of the white LED." Semiconductor Physics, Quantum Electronics and Optoelectronics 25, no. 1 (March 24, 2022): 76–82. http://dx.doi.org/10.15407/spqeo25.01.076.

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People spend most of the time under artificial light sources, so it is important to create a comfortable lighting environment for work and rest. Four-component RGBW systems are the most effective for this. It is needed to create methods for obtaining white light with the specified parameters and choose the most optimal LED components. In this work, the influence of the white LEDs parameters on the resulting white light of the RGBW systems is studied. Two different methods proposed by us earlier for obtaining white light are applied for three RGBW systems with different warm white LEDs. It is shown that the use of white LEDs with a colour rendering index close to 80 is more optimal for most applications. In this case, they provide the resulting white light with the colour rendering index above 90 and luminous efficacy above 130 lm/W.
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Rybalochka, Andrii, Vasyl Kornaga, Daria Kalustova, Vadym Mukhin, Yaroslav Kornaga, Valerii Zavgorodnii, and Sergiy Valyukh. "White Colour Hues in Displays and Lighting Systems Based on RGB and RGBW LEDs." International Journal of Image, Graphics and Signal Processing 14, no. 3 (June 8, 2022): 1–10. http://dx.doi.org/10.5815/ijigsp.2022.03.01.

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XIONG Chen-yu, 熊晨雨, 吴玉香 WU Yu-xiang, 李杨 LI Yang, and 文尚胜 WEN Shang-sheng. "Application of Mixed Light Optimization of RGBW-LEDs in Solar Simulation." ACTA PHOTONICA SINICA 46, no. 8 (2017): 823006. http://dx.doi.org/10.3788/gzxb20174608.0823006.

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Kornaga, V. I. "Color mixing models for smart lighting systems based on RGBW and WW LEDs." Semiconductor Physics Quantum Electronics and Optoelectronics 18, no. 3 (September 30, 2015): 302–8. http://dx.doi.org/10.15407/spqeo18.03.302.

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XIONG Chen-yu, 熊晨雨, 吴玉香 WU Yu-xiang, and 文尚胜 WEN Shang-sheng. "Research on Color Mixing and Optimization of RGBW-LEDs Based on Genetic Algorithm." Chinese Journal of Luminescence 38, no. 2 (2017): 254–65. http://dx.doi.org/10.3788/fgxb20173802.0254.

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Bayneva, I. I. "LED AND LIGHT TECHNOLOGIES IN DATA TRANSMISSION." Spravochnik. Inzhenernyi zhurnal, no. 292 (July 2021): 51–56. http://dx.doi.org/10.14489/hb.2021.07.pp.051-056.

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The article deals with the main issues of organizing information transmission systems using modern light technologies. An assessment of the role of LED lighting technology, in particular, LEDs, in the organization of Light Fidelity technology as an innovative technology for wireless optical data transmission is given. An urgent task is to identify the most effective LED light sources for organizing Li-Fi networks. The main provisions on the use of LED light sources for the effective operation of Li-Fi networks are given. The main characteristics and areas of application of Li-Fi technology are analyzed. Since the main component of the Li-Fi system is an LED, the main types and characteristics of modern LEDs, including super-bright LEDs, are considered. Also considered are the features and possibilities of using RGBW-LEDs as more optimal in a number of indicators for organizing Li-Fi networks.
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Kalustova, D., V. Kornaga, A. Rybalochka, and S. Valyukh. "Space of visual and circadian parameters of RGBW lighting systems." Lighting engineering and power engineering 1, no. 57 (April 6, 2020): 16–21. http://dx.doi.org/10.33042/2079-424x-2020-1-57-16-21.

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Due to the proven effect of light on human circadian rhythms, nowadays researchers and developers of lighting systems (LS) concentrate on the non-visual parameters of light and methods of ensuring a safe comfortable light environment. This requires optimisation of spectral power distribution (SPD). In this view the most promising and functional are RGBW systems due to their ability to change dynamically SPD and, hence, light parameters. In this work we explore two RGBW (red-greenblue-white) systems with different white LEDs (warm white and neutral white) and the space of visual and non-visual parameters that they can ensure. Visual parameters are studied in terms of colour rendering index, colour fidelity index and visual corneal illuminance while non-visual parameters are studied in terms of circadian light, circadian stimulus and circadian action factor. These parameters are calculated for different contribution of the components in a correlated colour temperature (CCT) range of 2500 – 7000K. In addition, acceptable criterion of the colour fidelity index above 85 is used. It is shown that under this condition the circadian action factor in the range of 0.33-0.98 can be obtained by changing the CCT and (or) colour fidelity index. Also an achievable area of the circadian stimulus versus corneal illuminance space for RGBW systems is found. It enables to choose optimal combination of CCT, circadian stimulus and corneal illuminance to provide the desired level of circadian effect with sufficient visual comfort depending on the daytime and field of system's implementation. This data is useful for LS manufacturers and lighting designers to create a comfortable lighting environment. Keywords - RGBW colour mixing, tunable white light, circadian effect, colour rendering, colour fidelity index.
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Kalustova, Daria, Vasyl Kornaga, Andrii Rybalochka, Ying-Jie Yu, and Sergiy Valyukh. "Colour temperature tunable RGBW clusters with 3 control channels." Photonics Letters of Poland 12, no. 1 (March 31, 2020): 10. http://dx.doi.org/10.4302/plp.v12i1.968.

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The work is devoted to development of a smart lighting system that is able to change correlated colour temperature and consists of tunable 4-components RGBW clusters controlled via three channels. It is shown that fixing a ratio between the intensities of white and red LEDs at a level of 100:9 enables obtaining high values of colour rendering in a wide range of correlated colour temperatures. A control of 3 from 4 channels simplifies the system. The influence of the red LED on CRI and luminous efficiency is analysed. Full Text: PDF References:J. Gooley, S. Rajaratnam, G. Brainard, R. Kronauer, C. Czeisler and S. Lockley, "Spectral Responses of the Human Circadian System Depend on the Irradiance and Duration of Exposure to Light", Sci Transl Med 2, 31 (2010) [CrossRef]A. Borisuit, F. Linhart, J. Scartexxini, M. Munch, Light Res Technol 47, 192 (2014) [CrossRef]Q. Dai, W. Cai, L. Hao, W Shi and Z. Wang, Light Res Technol 50 (8), 1198-1211 (2017), [CrossRef]V. Kornaga, V. Sorokin, A. Rybalochka, O. Oliinyk and N. Kornaga, Semicond Phys Quantum Electron Optoelectron 18, 302 (2015) [CrossRef]Illuminating Engineering Society, ANSI/IES TM-30-18 IES method for evaluating light source color rendition (2018). New York, NY[DirectLink]Commission International de l'Éclairage, CIE 224:2017 Colour fidelity index for accurate scientific use (2017). Vienna [CrossRef]V. Kornaga, D. Kalustova and O. Oliynyk, Int Sci Conf "Light and power eng: hist, probl, perspect" 6, 43 (2018) [DirectLink]
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Brzychczyk, Beata, Tomasz Hebda, Jakub Fitas, and Jan Giełżecki. "The Follow-up Photobioreactor Illumination System for the Cultivation of Photosynthetic Microorganisms." Energies 13, no. 5 (March 3, 2020): 1143. http://dx.doi.org/10.3390/en13051143.

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The article presents the basic conceptual assumptions of a photobioreactor with a complementary lighting system. The cylindrical bioreactor has three independent, interconnected, and fully controlled lighting systems. A characteristic feature is the combination of the lighting system with the measurement of photosynthetically active PAR (photosynthetically active radiation) and the optical density of the culture medium. The entire lighting system is based on RGBW (“red, green, blue, white”) LED and RBG (“red, green, blue”) LEDs. The pilot study was conducted on a simplified prototype of a photobioreactor designed for the distribution and optimization of light in algae cultures designed for energy purposes. The study was carried out on microalgae Chlorella Vulgaris BA0002a from the collection of marine algae cultures.
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Dissertations / Theses on the topic "RGBW LEDs"

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Coufal, Miroslav. "Modulární RGB LED displej." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2013. http://www.nusl.cz/ntk/nusl-220135.

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The aim of this master’s thesis was the design RGB LED display with Ethernet interface. I created a display module, controlled by a microcontroller ATmega 2560-16AU. These modules can be connected via a serial RS485 standard. Ethernet connection is made via plug-in interface that uses the programmable module Rabbit RCM 3200. I documented a proposal. I tested designed device.
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Zemánek, Petr. "Modulární RGB LED displej s rozhraním Ethernet." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2014. http://www.nusl.cz/ntk/nusl-220700.

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This thesis deals with an electronic circuit and a PCB of a modular RGB LED display with the Ehernet interface. Firstly, author describes a RGB colour model, features of RGB LED displays, ways of control them. The next chapter contains a short description of the Ethernet interface, UDP and TCP protocols and a lwIP TCP/IP stack. The last theoretical chapter is an introduction to ARM Cortex-M3 and Cortex-M4 based microcontrollers. The next chaper is deals with a hardware design of the modular RGB LED display. The device is designed to be modular. Individual devices can be combosed together and create a larger display. Data from the Ethernet interface will be displayed on the RGB LED matrix, resolution of the matrix is 32 × 32 (1024 diodes). A refresh frequency is 100 Hz, a color depth is High color (16 bits) and a scanning 1/16 (two rows is driven at the same time). The next chapter describes the firmware for the RGB LED display, all its logical parts including a web page. Author also created the PC application, which sends pictures using UDP protocol to individual modules.
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Левковський, О. В. "Світлодіодна стрічка. RGB–стрічка." Thesis, Сумський державний університет, 2015. http://essuir.sumdu.edu.ua/handle/123456789/43713.

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В останній час світлодіодні стрічки набирають все більшу популярність в житті та побуті людей. Світлодіодна стрічка - джерело світла, зібраного на основі світлодіодів. Являє собою гнучку друковану (монтажну) плату, на якій рівновіддалено один від одного розташовані світлодіоди.
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Šunka, Pavel. "Aplikace FPGA v řízení maticových displejů LED." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2018. http://www.nusl.cz/ntk/nusl-376970.

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The thesis gives an overview of the issue of control of full-color RGB LED panels with a large number of rows and columns. It deals with communication protocols for image transfer and information exchange. It focuses on implementing the FPGA into the RGB LED control structure. In the first half, the thesis focuses on deepening the theoretical knowledge about LED technologies, their control and color display. It further solves communication with superior elements. The last part of the theory is dedicated to FPGA circuits. The second part of the thesis describes the practical design of the FPGA circuit from UART and SPI communication through data storage from the communication to the panel control itself.
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Biba, Panagiota. "New waviness measurement system using RGB LED lights." Thesis, Högskolan i Halmstad, Akademin för informationsteknologi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-28314.

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Due to the rapid technological developments in the car industry and the high quality demands of customers, manufacturers and researchers focus on the reduction of surface roughness making use of various surface topography measurement systems. This master thesis focuses on development of a waviness measurement system (WMS) at Volvo Cars where light from different heights and angles illuminates the surface of an extended object in order to acquire images with different intensities due to shadowing effect and reflection. With this, surface irregularities and imperfections can be detected both in polished and unpolished surfaces for improving the car panels in the manufacturing process.  The initial WMS idea was to illuminate the surface at different heights from the four corners of a dark room using 20 flash lights and a camera positioned exactly on the top of the surface in the middle of the room. The first light goes on and the image is acquired. This procedure continues for all flash lights in 19s.The acquired images were evaluated by Matlab application. With the new WMS system flash lights are replaced by 32 RGB COB LED lights using the DMX512 protocol to communicate with them. The system runs in 9s which is half the time of the old WMS system. New LabView and Matlab codes were adjusted to the new parameters and devices. In the end, measurements were taken with different surfaces, exposure times and color lights. Details of the new devices and software are analyzed in this thesis.
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Baldárrago, Catcoparco Jhair Andree. "Diseño de efectos y variación de colores mediante degradé en leds de potencia RGB aplicados a paneles publicitarios." Bachelor's thesis, Pontificia Universidad Católica del Perú, 2010. http://tesis.pucp.edu.pe/repositorio/handle/123456789/527.

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En el presente trabajo se realizó el diseño de efectos con colores mediante degradés en una matriz de LEDs de potencia RGB orientado a paneles publicitarios, con el objetivo de implementar este sistema de iluminación como una opción frente a los métodos tradicionales, pues estos últimos ofrecen muchas desventajas, tanto en la parte visual como en la parte económica. Además de incluir en el diseño, una interfaz para ser operada por un usuario, de manera fácil e intuitiva, la cual actualmente no es brindada por los equipos comerciales que ofrecen este tipo de iluminación, pues estos ya vienen predeterminados desde su fabricación. El diseño realizado consta de 2 partes. La primera parte es el desarrollo del software, es decir, el programa cuyo fin es lograr el degradés de los colores, así como los efectos realizados con estos; mientras que la segunda parte es el hardware, lo que incluye tanto los controladores de potencia para los LEDs, como los LEDs mismos y la tarjeta de control de todo el sistema. Ambas partes, así como la investigación previa, están documentadas en 4 capítulos. En el primer capítulo, se definen los métodos de publicidad visual, dentro de los cuales se encuentra la publicidad exterior (paneles), así como la visión humana y sus características en función a los colores. Luego, en el segundo capítulo, se muestra el estado actual de la iluminación con LEDs de potencia RGB, su funcionamiento y aplicaciones actuales en la industria. En el tercer capítulo, se desarrolla el diseño planteado para cubrir los objetivos, tanto en la parte de hardware (controladores, LEDs de potencia, etc.) como en software (desarrollo de programa). Finalmente, en el cuarto capítulo, se presentan las simulaciones y fotografías, las cuales prueban en correcto funcionamiento de los subsistemas que conforman la iluminación con LEDs, así como el sistema integral conjunto. Además, en la última parte se presentan las conclusiones y recomendaciones en el desarrollo del prototipo presentado, para que puedan ser tomadas en cuenta para futuras mejoras de este.
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Medrano, Arias Eduardo Alfredo. "Rediseño e implementación de un sistema de iluminación para espacios publicitarios usando Led RGB." Bachelor's thesis, Pontificia Universidad Católica del Perú, 2010. http://tesis.pucp.edu.pe/repositorio/handle/123456789/509.

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Los sistemas de iluminación son desarrollos que permiten al hombre visualizar de una mejor forma a los objetos desde un punto de vista artístico y funcional. Estos sistemas tienen un amplio campo de aplicación en nuestra vida diaria. Están referidos al proceso en el cual la iluminación forma parte del diseño del objeto usando dispositivos capaces de satisfacer el tipo, calidad y color de luz que se requiere. Dado que en el Perú los sistemas de iluminación cumplen una gran importancia como elemento que forma parte del diseño de espacios públicos y comerciales, es necesario enfrentar el problema de la iluminación conociendo las características de ella. Por esto se plantea la utilización de una nueva tecnología como el LED (Light-Emitting Diode) de potencia en el desarrollo de sistemas de iluminación aprovechando las características que este dispositivo trae. La presente tesis consiste en el rediseño e implementación de un sistema de iluminación aplicado a un display1 publicitario de una superficie de 25x25cm2. Uno de los objetivos es mejorar la iluminación mediante la aplicación de la nueva tecnología, el LED RGB (Red Green Blue) que permite obtener un color determinado, rojo, verde y azul; además de variar su intensidad de brillo. Con el uso de lentes convergentes es posible mezclar los colores primarios para obtener los colores secundarios; amarillos, cian y magenta; y el color blanco. El siguiente documento se encuentra dividido en cuatro capítulos principales; el primero de ellos explica la importancia de la iluminación publicitaria en espacios publicitarios. El segundo capítulo brinda información sobre la evolución de los sistemas de iluminación convencionales hasta llegar a la tecnología LED. El tercer capítulo muestra las consideraciones para el rediseño e implementación del sistema, los componentes elegidos, así como los cálculos y criterios de selección. El último capítulo menciona los resultados obtenidos, análisis de costo y conclusiones finales. Al final del documento se muestra las recomendaciones, sobre el rendimiento del sistema de iluminación y como mejorarlo, las referencias utilizadas y en la sección de anexos hojas de datos de los componentes utilizados.
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Lara, Alvarado Carlo Manuel. "Diseño de un sistema de iluminación para espacios publicitarios pequeños usando Leds de potencia RGB / Carlo Manuel Lara Alvarado." Bachelor's thesis, Pontificia Universidad Católica del Perú, 2009. http://tesis.pucp.edu.pe/repositorio/handle/123456789/258.

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Debido al acelerado desarrollo de los semiconductores, en los últimos 15 años, se ha logrado dejar de usar a los LEDs como simplemente fuentes de señalización en diversas aplicaciones minúsculas, por ejemplo en los muy conocidos displays de 7 segmentos o como puntos brillantes en los teclados y circuitos electrónicos, para pasar con fuerza al ámbito de la iluminación. Es así, como grandes empresas internacionales han fijado su interés en el desarrollo y afianzamiento en el mercado de los llamados LEDs de potencia o alto brillo, dado que, como su nombre lo indica, han llegado a multiplicar su capacidad de generar luz y mejorar su eficiencia luminosa hasta el punto de competir y superar otros tipos tradicionales de fuentes de iluminación. Es por estas razones, que el objetivo de este trabajo de tesis es diseñar un sistema de iluminación usando LEDs de potencia RGB para espacios publicitarios de tamaño pequeño, ya que el ámbito de la publicidad es un mercado donde se permite aplicar todo el potencial de una nueva tecnología de iluminación multicolor.
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Stuchi, José Augusto. "Registro de imagens por correlação de fase para geração de imagens coloridas em retinógrafos digitais utilizando câmera CCD monocromática." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/18/18152/tde-18072013-110903/.

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A análise da retina permite o diagnostico de muitas patologias relacionadas ao olho humano. A qualidade da imagem e um fator importante já que o médico normalmente examina os pequenos vasos da retina e a sua coloração. O equipamento normalmente utilizado para a visualização da retina e o retinógrafo digital, que utiliza sensor colorido com filtro de Bayer e luz (flash) branca. No entanto, esse filtro causa perda na resolução espacial, uma vez que e necessário um processo de interpolação matemática para a formação da imagem. Com o objetivo de melhorar a qualidade da imagem da retina, um retinógrafo com câmera CCD monocromática de alta resolução foi desenvolvido. Nele, as imagens coloridas são geradas pela combinação dos canais monocromáticos R (vermelho), G (verde) e B (azul), adquiridos com o chaveamento da iluminação do olho com LED vermelho, verde e azul, respectivamente. Entretanto, o pequeno período entre os flashes pode causar desalinhamento entre os canais devido a pequenos movimentos do olho. Assim, este trabalho apresenta uma técnica de registro de imagens, baseado em correlação de fase no domínio da frequência, para realizar precisamente o alinhamento dos canais RGB no processo de geração de imagens coloridas da retina. A validação do método foi realizada com um olho mecânico (phantom) para a geração de 50 imagens desalinhadas que foram corrigidas pelo método proposto e comparadas com as imagens alinhadas obtidas como referência (ground-truth). Os resultados mostraram que retinógrafo com câmera monocromática e o método de registro proposto nesse trabalho podem produzir imagens coloridas da retina com alta resolução espacial, sem a perda de qualidade intrínseca às câmeras CCD coloridas que utilizam o filtro de Bayer.
The analysis of retina allows the diagnostics of several pathologies related to the human eye. Image quality is an important factor since the physician often examines the small vessels of the retina and its color. The device usually used to observe the retina is the fundus camera, which uses color sensor with Bayer filter and white light. However, this filter causes loss of spatial resolution, since it is necessary a mathematical interpolation process to create the final image. Aiming at improving the retina image quality, a fundus camera with monochromatic CCD camera was developed. In this device, color images are generated by combining the monochromatic channels R (red), G (green) and B (blue), which were acquired by switching the eye illumination with red, green and blue light, respectively. However, the short period between the flashes may cause misalignment among the channels because of the small movements of the eye. Thus, this work presents an image registration technique based on phase correlation in the frequency domain, for accurately aligning the RGB channels on the process of generating retina color images. Validation of the method was performed by using a mechanical eye (phantom) for generating 50 misaligned images, which were aligned by the proposed method and compared to the aligned images obtained as references (ground-truth). Results showed that the fundus camera with monochromatic camera and the method proposed in this work can produce high spatial resolution images without the loss of quality intrinsic to color CCD cameras that uses Bayer filter.
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Ashiabor, Awo Dede O. "A design for an RGB LED driver with independent PWM control and fast settling time." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/41251.

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Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2007.
Includes bibliographical references (leaves 76-77).
A small sized and efficient method to power RGB LEDs for use as backlights in flat panel displays is explored in this thesis. The proposed method is to drive a parallel switched connection of LEDs with a single Average Mode Controlled buck regulator.Specifications for the switching regulator and control circuitry are described. The application circuit demonstrates current settling times between 7[mu]s and 30[mu]s at a switching frequency of 290kHz. Current settling is improved at higher switching frequencies, with settling times approaching a 2[mu]s to 4[mu]s range at 1MHz switching.
by Awo Dede O. Ashiabor.
M.Eng.
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Book chapters on the topic "RGBW LEDs"

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Bartmann, Erik, and Jörn Donges. "Sag es mit Farben! Die RGB-LEDs (Projekt 9)." In Open Robots für Maker, 217–27. München: Carl Hanser Verlag GmbH & Co. KG, 2018. http://dx.doi.org/10.3139/9783446456129.015.

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Bartmann, Erik, and Jörn Donges. "Das Farbenspiel – weitere Einsatzmöglichkeiten der RGB-LEDs (Projekt 10)." In Open Robots für Maker, 229–44. München: Carl Hanser Verlag GmbH & Co. KG, 2018. http://dx.doi.org/10.3139/9783446456129.016.

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Sree, T. Kavya, V. Swetha, M. Sugadev, and T. Ravi. "IoT Based RGB LED Information Display System." In Advances in Intelligent Systems and Computing, 431–42. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-6981-8_34.

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Ma, Cui, Ming Yu, Fokui Chen, Hui Zhu, and Haitao Fang. "Compact Multispectral Camera Using RGB LED and Optimization." In Intelligent Robotics and Applications, 536–44. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-89134-3_49.

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Haverinen, Hanna, and Ghassan E. Jabbour. "Application of Inkjet Printing in High-Density Pixelated RGB Quantum Dot-Hybrid LEDs." In Inkjet-Based Micromanufacturing, 217–36. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2012. http://dx.doi.org/10.1002/9783527647101.ch14.

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Zhao, Heng, Chungang Zhuang, Lei Jia, and Han Ding. "6D Pose Estimation of Texture-Less Object in RGB-D Images." In Mechatronics and Machine Vision in Practice 4, 45–58. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-43703-9_4.

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Lopatin, Vladyslav, and Bogdan Kwolek. "6D Pose Estimation of Texture-Less Objects on RGB Images Using CNNs." In Artificial Intelligence and Soft Computing, 180–92. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-61401-0_18.

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Carraro, Marco, Matteo Munaro, Jeff Burke, and Emanuele Menegatti. "Real-Time Marker-Less Multi-person 3D Pose Estimation in RGB-Depth Camera Networks." In Intelligent Autonomous Systems 15, 534–45. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-01370-7_42.

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Xu, Bo, Li Wang, Jian Kang, Cong Qiu, and C. Patrick Yue. "An RGB-LED Driver with Feed-Forward Equalization Used for PAM-4 Visible Light Communication." In Machine Learning and Intelligent Communications, 228–34. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-66785-6_26.

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Mouli, Surej, Ramaswamy Palaniappan, and Ian P. Sillitoe. "A Configurable, Inexpensive, Portable, Multi-channel, Multi-frequency, Multi-chromatic RGB LED System for SSVEP Stimulation." In Brain-Computer Interfaces, 241–69. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-10978-7_9.

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Conference papers on the topic "RGBW LEDs"

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Wei, An-Chi, Shih-Chieh Lo, Pei-Fang Hung, Ju-Yi Lee, Chia-Ming Li, Hong-Cheng Huang, and Hong-Yih Yeh. "Compound parabolic concentrator design for RGBW LEDs light mixing." In 2015 20th Microoptics Conference (MOC). IEEE, 2015. http://dx.doi.org/10.1109/moc.2015.7416492.

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Tanaka, Midori, Takahiko Horiuchi, and Shoji Tominaga. "Color control of a lighting system using RGBW LEDs." In IS&T/SPIE Electronic Imaging, edited by Reiner Eschbach, Gabriel G. Marcu, and Alessandro Rizzi. SPIE, 2011. http://dx.doi.org/10.1117/12.872374.

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Li, Kenneth. "Brightness increase using dual parabolic recycling collar and RGBW LEDs for pico-projector applications." In SPIE OPTO, edited by Liang-Chy Chien, Sin-Doo Lee, and Ming Hsien Wu. SPIE, 2014. http://dx.doi.org/10.1117/12.2044625.

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Znamenskiy, Dmitry, and Oleg Belik. "Computation of minimal RGB LED backlight intensity for RGBW LCD displays." In 2009 IEEE 13th International Symposium on Consumer Electronics. IEEE, 2009. http://dx.doi.org/10.1109/isce.2009.5156822.

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Galal, Mariam, Wai Pang Ng, Richard Binns, and Ahmed Abd El Aziz. "Characterization of RGB LEDs as Emitter and Photodetector for LED-to-LED Communication." In 2020 12th International Symposium on Communication Systems, Networks and Digital Signal Processing (CSNDSP). IEEE, 2020. http://dx.doi.org/10.1109/csndsp49049.2020.9249617.

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Greisukh, Grigoriy, Evgeny Ezhov, and Artem I. Antonov. "Imaging harmonic diffractive lens for RGB LED radiation." In Holography, Diffractive Optics, and Applications XI, edited by Changhe Zhou, Yunlong Sheng, and Liangcai Cao. SPIE, 2021. http://dx.doi.org/10.1117/12.2598245.

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Polzer, A., W. Gaberl, M. Davidovic, and H. Zimmermann. "Integrated filter-less BiCMOS sensor for RGB-LED color determination." In 2011 IEEE Sensors. IEEE, 2011. http://dx.doi.org/10.1109/icsens.2011.6126957.

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Shimada, Jun-ichi, Daishiro Kato, Kunihiko Terauchi, Kazuhiro Itoh, Masashi Yanada, Masanori Shimomura, Hiroaki Tsuneduka, and Yoichi Kawakami. "Surgical retractor with RGB-WHITE LEDs." In Integrated Optoelectronic Devices 2008, edited by Klaus P. Streubel and Heonsu Jeon. SPIE, 2008. http://dx.doi.org/10.1117/12.761979.

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Filoteo-Razo, J. D., J. M. Estudillo-Ayala, J. C. Hernández-Garcia, M. Trejo-Durán, A. Muñoz-Lopez, D. Jauregui-Vázquez, and R. Rojas-Laguna. "RGB color sensor implemented with LEDs." In SPIE Optical Engineering + Applications, edited by Matthew H. Kane, Jianzhong Jiao, Nikolaus Dietz, and Jian-Jang Huang. SPIE, 2015. http://dx.doi.org/10.1117/12.2188243.

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Durrani, Shaheer Shaida, Abu Zaharin Ahmad, Bakri Hasan, and Mohd Shafie Bakar. "A Robust Driver for RGB LEDs." In 2018 IEEE International Conference on Information and Automation for Sustainability (ICIAfS). IEEE, 2018. http://dx.doi.org/10.1109/iciafs.2018.8913396.

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Reports on the topic "RGBW LEDs"

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Bhatt, Parth, Curtis Edson, and Ann MacLean. Image Processing in Dense Forest Areas using Unmanned Aerial System (UAS). Michigan Technological University, September 2022. http://dx.doi.org/10.37099/mtu.dc.michigantech-p/16366.

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Abstract:
Imagery collected via Unmanned Aerial System (UAS) platforms has become popular in recent years due to improvements in a Digital Single-Lens Reflex (DSLR) camera (centimeter and sub-centimeter), lower operation costs as compared to human piloted aircraft, and the ability to collect data over areas with limited ground access. Many different application (e.g., forestry, agriculture, geology, archaeology) are already using and utilizing the advantages of UAS data. Although, there are numerous UAS image processing workflows, for each application the approach can be different. In this study, we developed a processing workflow of UAS imagery collected in a dense forest (e.g., coniferous/deciduous forest and contiguous wetlands) area allowing users to process large datasets with acceptable mosaicking and georeferencing errors. Imagery was acquired with near-infrared (NIR) and red, green, blue (RGB) cameras with no ground control points. Image quality of two different UAS collection platforms were observed. Agisoft Metashape, a photogrammetric suite, which uses SfM (Structure from Motion) techniques, was used to process the imagery. The results showed that an UAS having a consumer grade Global Navigation Satellite System (GNSS) onboard had better image alignment than an UAS with lower quality GNSS.
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