Search Results - "led"

This article deals with the development of lightweight UHPC facade panel which also can serve as an LED display. Combining both functions into one gives the potential ability to create a LED display on the facade of the building. The article describes the experiences of the development and productio...

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Micro-Light-Emitting Diode (μLED) displays are of increasing interest in applications which require extremely high resolutions such as virtual and alternate reality headsets. Most modern full-color μLED displays rely on red, green, and blue (RGB) pixels based on different mater...

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The potential of ultraviolet (UV) AlGaN quantum well (QW) light-emitting diodes (LEDs) is stunted due to the lack of efficient p-type doping for this ultra wide bandgap material. In this work, a novel device - UV electrostatic field effect LED (EFELED) is demonstrated to address this issue by signif...

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Crop productivity is significantly affected by the dose of optical radiation. In particular, southern crops do not have enough time to ripen in a temperate climate because of decreased daylight duration. In conditions of protected soil due to low irradiance and a short daylight duration in autumn­-w...

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Gallium Nitride (GaN) based light-emitting diodes (LEDs) suffer from the persistent issue of high resistivity of the p-type layer, due to inefficient dopant activation at room temperature. Here, a novel Electrostatic Field Effect LED (EFELED) is demonstrated to solve this issue by introducing signif...

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El lúpulo (Humulus lupulus L.) es uno de los cultivos emergentes en Florida. La industria de la cerveza artesanal de Florida ha experimentado un crecimiento significativo en los últimos 10 años, con 285 cervecerías que produjeron 42.6 millones de galones de cerveza y generaron un impacto económico...

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In the manned spaceflight project, LED is used as the light source of the lighting subsystem of the manned spaceflight vehicle for the first time. The application of LED lighting source meets the lighting requirements of astronauts' short-time extravehicular activities in the extravehicular spa...

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For widely used LED sources there is a sharp decrease in the illumination of the working plane from the center to the edge. The purpose of this study was to analyze the effectiveness of Fresnel lenses usage as a fairly simple and technological element to increase the uniformity of illumination creat...

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Сreation of indoor lighting systems with the possibility of changing its parameters in space and time is a promising direction within the framework of the intellectual environment system. The aim of this work was to create a methodology for calculating the illumination created by LED matrices which...

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The difference in the spectral composition of artificial and natural lighting can negatively affect health, as well as lead to a distorted perception of the color of surrounding objects. At the same time, a certain correction of the spectral composition of visible radiation in medical institutions a...

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In this research, a series resonant LED driver circuit based on the differential-mode transformer for current equalization is proposed. In this circuit, the series resonant converter adopts controlled frequency modulation to change the energy transferred to the output while realizing zero voltage sw...

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Hops (Humulus lupulus L.) are an emerging crop in Florida. Florida’s craft beer industry has experienced significant growth over the last 10 years, with 285 breweries producing 42.6 million gallons of beer and generating an economic impact of $3.6 billion in 2018. To respond to their strong demand...

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Carotenoids are an important component of the human diet, and fruit is a primary source of carotenoids. The synthesis and regulation of carotenoids in fruit are important contributors to the formation of fruit quality. In China, strawberry is one of the main seasonal fruits grown in the winter. Prev...

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This paper reports a monolithic integration of GaN high-electron-mobility transistor (HEMT) and green light-emitting diode (LED), where the circular HEMT is surrounded by a ring-shaped LED and two devices are seamlessly interconnected by the LED's n-GaN layer and the HEMT's two...

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Hops (Humulus lupulus L.) are an emerging crop in Florida. Florida’s craft beer industry has experienced significant growth over the last 10 years, with 285 breweries producing 42.6 million gallons of beer and generating an economic impact of $3.6 billion in 2018. To respond to their strong demand...

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Farming is an important development direction of agriculture in the future, which is affected by various environmental factors, among which light plays an important role, and it is essential for the growth of organisms in nature. LED technology can regulate the growth and development of vegetables b...

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Information about principle of operation of the setup for measurement of the photometric, radiometric, spectral and spatial characteristics of radiation of laser diodes and LEDs in the spectral range from 250 to 900 nm constructed in the B.I. Stepanov Institute of Physics of NAS of Belarus and the r...

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With the advantages of high positioning accuracy and low cost, visible light positioning (VLP) is becoming a promising solution for practical indoor positioning system. However, most of the VLP systems require at least two VLP LED lamps for accurate position calculation. Therefore, the application o...

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This study introduces a microwave-assisted technique for extracting critical minerals from LED electronic waste. The process begins with microwave irradiation, which thermally decomposes the LED’s plastic lens into a brittle, charred residue. During this stage, the LED chip undergoes deflagration—be...

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Electronic devices are getting smaller each time and the technology, increasingly complex. Commonly found problems such as reflow soldering and open solder connections, which are mostly difficult to detect by conventional means like X-ray images or physical cut on the transverse section. Along with...

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