Design of Light Emitting Diodes (LEDs) Lighting System and Its Application in Garden Landscape Decoration

Light Emitting Diode (LED) is widely used in garden landscape decoration because of its small size, low power, concentrated light, and the capability of showing more vivid colors. While designing the LED lighting system, considering that a single Advanced RISC Machine (ARM)-based control system cannot achieve large-scale LED display, and a single Field Programmable Gate Array (FPGA)-based control system cannot control the lighting system well, an LED system with the combination of ARM processor-FPGA is proposed. In this system, the ARM processor is used as the major control component. The Linux system realizes remote monitoring and intelligent management of image data. In addition, FPGA is used for LED data output. The lighting system consists of a major control node and a lighting node. The nodes are connected in parallel through a chain network. The major control node uses an ARM Cortex processor and is equipped with a Linux operating system. The lighting node uses ARM + FPGA hardware architecture. During the experiments, the LED lighting system is tested first. The results show that the reading and writing speed is fast. The LED display screen meets the lighting requirements. This LED lighting system is used for night lighting of garden landscapes. During the brightness test, the brightness of lighting objects and the background is used as research objects. Experiments have proved that the ratio of the lighting object brightness to the background brightness between (Yu, M. and Li, X., 2012. A little current k-factor method for measuring junction temperature of aviation lighting power led. Guangxue Jishu/Optical Technique, 38(3), pp.371–375; Monas, A., Verma, A., Gawari, A. and Paswan, R. S., 2016. Portable network monitor using arm processor. Procedia Computer Science, 92, pp.493–497.) is suitable for night lighting of garden landscape decoration, which will not bring discomfort to people who enjoy night scenery.

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Optimized LED-Integrated Agricultural Facilities for Adjusting the Growth of Water Bamboo (Zizania latifolia)

Applied Sciences ◽

10.3390/app10041330 ◽

2020 ◽

Vol 10 (4) ◽

pp. 1330

Author(s):

Vincent K. S. Hsiao ◽

Teng-Yun Cheng ◽

Chih-Feng Chen ◽

Hao Shiu ◽

Yong-Jin Yu ◽

...

Keyword(s):

Light Emitting Diode ◽

Winter Season ◽

Lighting System ◽

Zizania Latifolia ◽

Light Emitting ◽

Led Lighting ◽

Led Light ◽

Bamboo Leaves

We investigated a light emitting diode (LED) lighting system applied to a water bamboo field during winter season at night, and the results indicated that this lighting system can prevent the stunting of water bamboo leaves and further assist its growth. Compared with previous LED systems, in which the LED bulbs were placed directly above water bamboo leaves, our LED lighting system presents the benefit of easy handling during harvest. To prevent the inhomogeneous coverage of LED light patterns, a new design of LED lenses was also incorporated.

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The Design of LED Intelligent Lighting Control System Based on CAN Bus

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.753-755.2637 ◽

2013 ◽

Vol 753-755 ◽

pp. 2637-2640

Author(s):

Bang Cheng Zhang ◽

Hua Zhen Wang ◽

Yan Qing Jiang ◽

Yan Juan Hu

Keyword(s):

Control System ◽

Can Bus ◽

Light Emitting Diode ◽

Railway Vehicle ◽

Lighting System ◽

Light Emitting ◽

Led Light ◽

Lighting Control ◽

Vibration Resistance ◽

Very High

In order to meet the requirements of high stability, high vibration resistance, energy saving and environmental protection and long service life for the railway vehicle car lighting system, this paper designed a LED (Light Emitting Diode) lighting control system suitable for railway vehicles car. Using IPC for the principal computer, microcontroller for the subordinate computer, CAN bus as the communication network. Multiple brightness sensor collect the brightness information of car environment. According to the characteristics that the LED is suitable for high frequency switch power, using PWM technology, the current though the LED light can be control. ATmega16 microcontroller as the control core can automatically to adjust the brightness of the car according to the change of external environment, it ensured that the LED light emitting uniform and stable so that this kind of control system has very high application value.

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Design and Implementation of a radio controlled led lighting system

Analecta Technica Szegedinensia ◽

10.14232/analecta.2016.1.29-34 ◽

2016 ◽

Vol 10 (1) ◽

pp. 29-34 ◽

Cited By ~ 1

Author(s):

Ádám Bálint ◽

József Sárosi

Keyword(s):

Radio Frequency ◽

Light Emitting Diode ◽

Lighting System ◽

Light Emitting ◽

Led Lighting ◽

Led Light ◽

Design And Implementation ◽

Technological Advances ◽

History Of ◽

Indoor Lighting

Technological advances allow us to control LED (Light Emitting Diode) lighting at home, in the office it can even allow us to change the intensity of the light and this is just the beginning of what the future holds for us. In this study an LED internal lighting fixture of our own design will be presented focusing on each step in its design. Firstly, the features, types and history of LEDs will be presented, next the products available in market that are required for the completion of the device. Finally, the design and implementation as well as the radio frequency controlled LED indoor lighting fixture will be shown.

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Study of high power light emitting diode (LED) lighting system in accelerating the growth rate of Lactuca sativa for indoor cultivation

International Journal of the Physical Sciences ◽

10.5897/ijps11.1568 ◽

2012 ◽

Vol 7 (11) ◽

Author(s):

Le-Yan Chin

Keyword(s):

Growth Rate ◽

Lactuca Sativa ◽

High Power ◽

Light Emitting Diode ◽

Lighting System ◽

Light Emitting ◽

Led Lighting

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A Supervisory Control Strategy for Improving Energy Efficiency of Artificial Lighting Systems in Greenhouses

Energies ◽

10.3390/en14010202 ◽

2021 ◽

Vol 14 (1) ◽

pp. 202

Author(s):

Gianluca Serale ◽

Luca Gnoli ◽

Emanuele Giraudo ◽

Enrico Fabrizio

Keyword(s):

Control Strategy ◽

Light Emitting Diode ◽

Cost Savings ◽

Energy Performance ◽

Lighting System ◽

Light Emitting ◽

Artificial Lighting ◽

Lighting Control ◽

Lighting Systems ◽

Power Densities

Artificial lighting systems are used in commercial greenhouses to ensure year-round yields. Current Light Emitting Diode (LED) technologies improved the system efficiency. Nevertheless, having artificial lighting systems extended for hectares with power densities over 50W/m2 causes energy and power demand of greenhouses to be really significant. The present paper introduces an innovative supervisory and predictive control strategy to optimize the energy performance of the artificial lights of greenhouses. The controller has been implemented in a multi-span plastic greenhouse located in North Italy. The proposed control strategy has been tested on a greenhouse of 1 hectare with a lighting system with a nominal power density of 50 Wm−2 requiring an overall power supply of 1 MW for a period of 80 days. The results have been compared with the data coming from another greenhouse of 1 hectare in the same conditions implementing a state-of-the-art strategy for artificial lighting control. Results outlines that potential 19.4% cost savings are achievable. Moreover, the algorithm can be used to transform the greenhouse in a viable source of energy flexibility for grid reliability.

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LED Rail Signals: Full Hardware Realization of Apparatus with Independent Intensity by Temperature Changes

Electronics ◽

10.3390/electronics10111291 ◽

2021 ◽

Vol 10 (11) ◽

pp. 1291

Author(s):

Giuseppe Schirripa Schirripa Spagnolo ◽

Fabio Leccese

Keyword(s):

Temperature Sensor ◽

Energy Efficient ◽

Light Emitting Diode ◽

Junction Temperature ◽

Light Emitting ◽

Temperature Changes ◽

Wide Range ◽

International Regulations ◽

Long Lifetime ◽

Set Up

Nowadays, signal lights are made using light-emitting diode arrays (LEDs). These devices are extremely energy efficient and have a very long lifetime. Unfortunately, especially for yellow/amber LEDs, the intensity of the light is closely related to the junction temperature. This makes it difficult to design signal lights to be used in naval, road, railway, and aeronautical sectors, capable of fully respecting national and international regulations. Furthermore, the limitations prescribed by the standards must be respected in a wide range of temperature variations. In other words, in the signaling apparatuses, a system that varies the light intensity emitted according to the operating temperature is useful/necessary. In this paper, we propose a simple and effective solution. In order to adjust the intensity of the light emitted by the LEDs, we use an LED identical to those used to emit light as a temperature sensor. The proposed system was created and tested in the laboratory. As the same device as the ones to be controlled is used as the temperature sensor, the system is very stable and easy to set up.

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Near Unity PLQY and High Stability of Barium Thiocyanate Based All-Inorganic Perovskites and Their Applications in White Light-Emitting Diodes

Photonics ◽

10.3390/photonics8060209 ◽

2021 ◽

Vol 8 (6) ◽

pp. 209

Author(s):

Gopi Chandra Adhikari ◽

Saroj Thapa ◽

Yang Yue ◽

Hongyang Zhu ◽

Peifen Zhu

Keyword(s):

White Light ◽

Large Scale ◽

Light Emitting Diode ◽

Photophysical Properties ◽

Environmental Stability ◽

Color Temperature ◽

Ambient Atmosphere ◽

Light Emitting ◽

Halide Perovskite ◽

Lead Halide

All-inorganic lead halide perovskite (CsPbX3) nanocrystals (NCs) have emerged as a highly promising new generation of light emitters due to their extraordinary photophysical properties. However, the performance of these semiconducting NCs is undermined due to the inherent toxicity of lead and long-term environmental stability. Here, we report the addition of B-site cation and X-site anion (pseudo-halide) concurrently using Ba(SCN)2 (≤50%) in CsPbX3 NCs to reduce the lead and improve the photophysical properties and stability. The as-grown particles demonstrated an analogous structure with an almost identical lattice constant and a fluctuation of particle size without altering the morphology of particles. Photoluminescence quantum yield is enhanced up to near unity (~98%) by taking advantage of concomitant doping at the B- and X-site of the structure. Benefitted from the defect reductions and stronger bonding interaction between Pb2+ and SCN− ions, Ba(SCN)2-based NCs exhibit improved stability towards air and moisture compared to the host NCs. The doped NCs retain higher PLQY (as high as seven times) compared to the host NCs) when stored in an ambient atmosphere for more than 176 days. A novel 3D-printed multiplex color conversion layer was used to fabricate a white light-emitting diode (LED). The obtained white light shows a correlated color temperature of 6764 K, a color rendering index of 87, and luminous efficacy of radiation of 333 lm/W. In summary, this work proposes a facile route to treat sensitive lead halide perovskite NCs and to fabricate LEDs by using a low-cost large-scale 3-D printing method, which would serve as a foundation for fabricating high-quality optoelectronic devices for near future lighting technologies.

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Thermal conduction characteristics of silicone composites including ultrasonic-treated graphite

Journal of Composite Materials ◽

10.1177/00219983211059582 ◽

2021 ◽

pp. 002199832110595

Author(s):

Weontae Oh ◽

Jong-Seong Bae ◽

Hyoung-Seok Moon

Keyword(s):

Thermal Conductivity ◽

Ultrasonic Treatment ◽

Thermal Conduction ◽

Light Emitting Diode ◽

Thermal Interface Material ◽

Ultrasonic Power ◽

Lighting System ◽

Thermal Interface ◽

Light Emitting ◽

Inorganic Oxides

The microstructural change of graphite was studied after ultrasonic treatment of the graphite. When the graphite solution was treated with varying ultrasonic power and time, the microstructure changed gradually, and accordingly, the thermal conductivity characteristics of the composite containing the as-treated graphite was also different with each other. Thermal conductivity showed the best result in the silicone composite containing graphite prepared under the optimum condition of ultrasonic treatment, and the thermal conductivity of the composite improved proportionally along with the particle size of graphite. When the silicone composite was prepared by using a mixture of inorganic oxides and graphite rather than graphite alone, the thermal conductivity of the silicone composite was further increased. A silicone composite containing graphite was used for LED (light emitting diode) lighting system as a thermal interface material (TIM), and the temperature elevation due to heat generated, while the lighting was actually operated, was analyzed.

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