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Solar photovoltaic fed dual input LED lighting system with constant illumination control

Kinattingal SUNDARESWARAN,Kevin Ark KUMAR,Payyalore Raman VENKATESWARAN,Sankaran PALANI

《能源前沿(英文)》 2016年 第10卷 第4期   页码 473-478 doi: 10.1007/s11708-016-0420-z

摘要: A dual input LED lighting scheme with constant illumination is proposed in this paper. The scheme employs a photovoltaic array as the first input and a battery as the second one. A microcontroller is programmed to operate a changeover switch as well as a DC-DC converter for uninterrupted and constant illumination in work place. The scheme is suitable for conference halls, laboratories, clean rooms, marriage halls, theaters, etc. The complete modeling, design and experimentation of the proposed scheme are explained and the economic viability of the scheme is justified.

关键词: photovoltaic     LED light     dual input     P&O algorithm    

Flexible resonant tank for a combined converter to achieve an HPS and LED compatible driver

Jin HU,Hui-pin LIN,Zheng-yu LU,Feng-wu ZHOU

《信息与电子工程前沿(英文)》 2015年 第16卷 第8期   页码 679-693 doi: 10.1631/FITEE.1500054

摘要: High pressure sodium (HPS) lamp has been widely used in street lighting applications because of its maturity, reliability, high lighting efficiency, long life-time, and low cost. Light emitting diode (LED) is expected as the next generation lighting source due to its continuously improving luminous efficacy, better color characteristic, and super long life-time. The two lighting sources may coexist in street lighting applications for a long time. A novel HPS and LED compatible driver is proposed which is rather suitable and flexible for driving HPS and LED in street lighting applications. The proposed driver combines the LLC and LCC resonant circuits into a flexible resonant tank. The flexible resonant tank may change to LLC or isolated LCC circuit according to the lighting source. It inherits the traditional HPS and LED drivers’ zero voltage switching (ZVS) characteristics and dimmable function. The design of the proposed flexible resonant tank considers the requirements of both HPS and LED. The experiments of driving HPS and LED on a prototype driver show that the driver can drive the two lighting sources flexibly with high efficiency.

关键词: High pressure sodium (HPS)     Light emitting diode (LED)     Compatible driver     Ballast    

固态照明系统中颜色维持率的研究进展 Review

Maryam Yazdan Mehr, Willem Dirk van Driel, 张国旗

《工程(英文)》 2015年 第1卷 第2期   页码 170-178 doi: 10.15302/J-ENG-2015035

摘要: 通过对LED 产品中透镜/密封件所用的各种材料的介绍, 探讨了这些材料对颜色漂移的促进作用。本文还就行业对光通维持率的定义标准化、表征描述与预测所做的工作进行了简单的回顾。

关键词: LED,颜色漂移,光通量衰减,流明衰减    

Multi-Component Resource Recycling from Waste Light-Emitting Diode Under Hydrothermal Condition: Plastic

Yongliang Zhang,Lu Zhan,Zhenming Xu,

《工程(英文)》 doi: 10.1016/j.eng.2023.04.008

摘要: Light emitting diodes (LEDs) have accounted for most of the lighting market as the technology matures and costs continue to reduce. As a new type of e-waste, LED is a double-edged sword, as it contains not only precious and rare metals but also organic packaging materials. In previous studies, LED recycling focused on recovering precious and strategic metals while ignoring harmful substances such as organic packaging materials. Unlike crushing and other traditional methods, hydrothermal treatment can provide an environment-friendly process for decomposing packaging materials. This work developed a closed reaction vessel, where the degradation rate of plastic polyphthalamide (PPA) was close to 100%, with nano-TiO2 encapsulated in plastic PPA being efficiently recovered, while metals contained in LED were also recycled efficiently. Besides, the role of water in plastic PPA degradation that has been overlooked in current studies was explored and speculated in detail in this work. Environmental impact assessment revealed that the proposed recycling route for waste LED could significantly reduce the overall environmental impact compared to the currently published processes. Especially the developed method could reduce more than half the impact of global warming. Furthermore, this research provides a theoretical basis and a promising method for recycling other plastic-packaged e-waste devices, such as integrated circuits.

关键词: Waste LED     Hydrothermal treatment     Recycling     Plastic PPA degradation     Packaging materials    

我国LED照明产业高端制造装备自主发展战略

“新一代绿色照明高端制造装备自主发展战略研究”课题组

《中国工程科学》 2017年 第19卷 第3期   页码 142-148 doi: 10.15302/J-SSCAE-2017.03.020

摘要:

本文论述了我国发光二极管(LED)照明产业高端制造装备的已有成就和存在的问题,分析了我国LED照明产业高端制造装备所面临的机遇和挑战,提出我国LED照明产业高端制造装备自主发展的战略目标,并从形成LED照明产业生态的视角,研究成立国家制造装备创新平台、完善市场化运作机制、构建创新驱动发展的政策环境和公平竞争的市场环境等战略路径。

关键词: LED高端制造装备     产业共生     产业链协作关系     国家制造装备创新平台     LED战略性中心企业    

UV-LED/P25-based photocatalysis for effective degradation of isothiazolone biocide

《环境科学与工程前沿(英文)》 2021年 第15卷 第5期 doi: 10.1007/s11783-020-1379-x

摘要:

• UV-LED with shorter wavelength was beneficial for photocatalytic degradation.

关键词: Degradation     Photocatalytic     LED     CMIT     P25    

全光谱 LED 照明用荧光粉发展现状及趋势

陈晓霞,张霞 ,刘荣辉,刘元红,周裔朋,庄卫东

《中国工程科学》 2020年 第22卷 第2期   页码 71-78 doi: 10.15302/J-SSCAE-2020.02.011

摘要:

随着人们对照明品质要求的提高,全光谱发光二极管(LED)照明成为发展热点。本文对全光谱 LED 用关键材料——荧光粉进行了详细分析,对比了每种体系的发光性能并给出了各类型的代表材料,重点阐述了紫光–近紫外光激发的多种颜色荧光粉的优劣势、研究进展以及实际应用情况可重点突破适合紫光–近紫光激发高光效和高热稳定性的宽谱蓝粉、青粉、黄绿粉、黄粉、长波红粉以及单一基质白光荧光粉的制备和应用技术,开发与现有应用产品体系相匹配的高效及连续化制备技术,由此促进全光谱 LED

关键词: 全光谱LED     高品质照明     紫光芯片     荧光粉    

我国新型显示关键材料发展战略研究

高伟男,毕勇,刘新厚,许祖彦

《中国工程科学》 2020年 第22卷 第5期   页码 44-50 doi: 10.15302/J-SSCAE-2020.05.007

摘要:

新型显示作为电子信息领域为数不多的千亿美元级产业,是信息化、智能化时代我国战略性新兴产业重点发展方向之一。本文针对新型显示关键材料与工艺在新型显示技术和产业发展进程中的战略性、支撑性和保障性作用开展论述,梳理了具有代表性的新型显示关键材料的研究现状与发展趋势,凝练了我国相关领域在材料技术和应用技术方面存在的问题,提出了我国新型显示关键材料发展目标和重点方向。研究建议:抓牢新一轮显示技术升级与产业转型的重大机遇,从国家经济发展全局的高度、全产业链生态的角度出发,以整机应用为牵引,以核心材料为突破口,打造新型显示创新平台,构建高效的技术创新体系;聚合优势力量,突破产业化发展中的核心共性关键材料与工艺问题,完善产业协同创新生态。从技术、市场、资金、政策等多个角度完成了新型显示创新平台的可行性分析,以期支持我国新型显示产业“从跟随到引领”的跨越式发展。

关键词: 新型显示     有机发光二极管     微米级发光二极管     激光显示     关键材料    

Dymola-based multi-parameters integrated optimization for high speed transfer system of LED chip sorter

Jie OUYANG, Bin LI, Shihua GONG

《机械工程前沿(英文)》 2013年 第8卷 第2期   页码 118-126 doi: 10.1007/s11465-013-0253-y

摘要:

To enhance the performance of high speed transfer system of LED chip sorting equipment, its control parameters need to be well matching with the mechanical system. In practical issues, it is difficult and time-consuming work to get these parameters matched because their selection is strongly depended on individuals. In current work, an integrated optimization method was carried out to solve this problem, in which the multiple control parameters optimization, modeling and simulation were included, i.e., a multi-domain model of transfer system performed on Dymola platform. Based on this model, the searching area of the key control parameters was narrowed by performing integrated optimization. After that a group of parameters were selected from this narrowed area to perform the equipment’s controls. The result showed this method possesses a simple and reliable nature. The optimal solutions also indicated that the optimized control parameters can well satisfy the requirements of transfer system. On the other hand, it greatly reduced the engineering adjustment time by using this method.

关键词: LED chip sorter     multi-domain modeling and simulation     parameter optimization     modelica language    

Research and Practice of Meta-synthesis Management for the Government-led Urban Complex Construction

Ru-gui Chen,Jia-meng Chen

《工程管理前沿(英文)》 2014年 第1卷 第1期   页码 52-61 doi: 10.15302/J-FEM-2014008

摘要: This paper researches the overall construction target of government-led urban complex construction projects based on the perspective of sustainable urban development.In order to achieve benefit maximization, the meta-synthesis management for the government-led urban complex construction project is studied.In order to combine theory and practice, several typical government-led urban complex construction project cases, such as Guangzhou Higher Education Mega Center and Guangzhou International Financial City etc. areexamined. These examples point to thefeasibility of government-led meta-synthesis management and demonstrate the benefits that can be achieved through this model.

关键词: government-led construction project     urban complex     meta-synthesis management     sustainable development     benefit maximization    

Effects of red and blue LEDs on

Lili CHEN, Xuzhang XUE, Yadong YANG, Fei CHEN, Jie ZHAO, Xiquan WANG, Alam Tariful KHAN, Yuegao HU

《农业科学与工程前沿(英文)》 2018年 第5卷 第2期   页码 197-205 doi: 10.15302/J-FASE-2018224

摘要: The objectives of this study were to investigate the effects of red and blue LEDs on growth and microtuberization of potato ( ) single-node cuttings. Explants were incubated under 6 light treatments: 100% red LEDs (R), 75% red LEDs+ 25% blue LEDs (3RB), 50% red LEDs+ 50% blue LEDs (RB), 25% red LEDs+ 75% blue LEDs (R3B), 100% blue LEDs (B) and white LEDs (W). Most of the growth and physiological parameters were significantly higher in 3RB than W. Enhancement of leaf area and chlorophyll concentrations were obtained in B. Leaf stomata were elliptical with the lowest density in 3RB. However, those in W were round in shape, and those with the smallest size and the highest density were observed in R. Most of the characteristics of microtuberization were also improved in 3RB. The combined spectra of red and blue LEDs increased the number of large microtubers. The fresh weight of individual microtubers in R and W were increased, but not their number. These results suggest that, of the treatments assessed, 3RB is optimal for the growth of potato plantlets and the combination of red and blue LEDs is beneficial for microtuberization.

关键词: blue LED     microtuber     plant tissue culture     potato plantlets in vitro     red LED    

LED灯具温度应力加速老化截止时间的确定 Article

Jian HAO, Lei JING, Hong-liang KE, Yao WANG, Qun GAO, Xiao-xun WANG, Qiang SUN, Zhi-jun XU

《信息与电子工程前沿(英文)》 2017年 第18卷 第10期   页码 1678-1678 doi: 10.1631/FITEE.1500483

摘要: LED灯具加速老化过程中,为获得最小截止时间,对其寿命进行快速预估,本文采用5阶滑动平均误差方法分析数据。选用同批次的16个样本,分别进行80℃和85℃应力条件下的加速老化。对于该类LED灯具,80℃时最小截止时间为1104小时,寿命预估误差为1.15%;85℃时最小截止时间为936小时,寿命预估误差为1.24%。

关键词: LED灯具;加速老化测试;中位寿命;滑动平均误差    

General framework and case study of China’s LED industry

Bin GUO, Peng DING, Frans J. A. M. GREIDANUS, Wen (Helena) LI

《工程管理前沿(英文)》 2021年 第8卷 第2期   页码 284-309 doi: 10.1007/s42524-019-0085-5

摘要: How latecomers from emerging countries catch up on technological innovation is an important topic for industrial practitioners, policymakers, and academic researchers. This study systematically reviews 37 empirical studies on the precursors of industry catch-up in emerging countries. A general framework on what makes a successful catch-up in latecomer industries is suggested based on literature review. The framework comprises six generic determinants, including technological capability, business ecosystem, government roles, market condition, technological regime, and windows of opportunity. In addition, this framework is applied to the Chinese LED industry, and a case analysis of the catch-up is performed in Chinese LED firms.

关键词: framework of catch-up     LED industry     emerging countries    

我国半导体照明发展战略研究

刘虹,陈良惠

《中国工程科学》 2011年 第13卷 第6期   页码 39-43

摘要:

在详细分析国内外半导体照明产业发展现状和趋势的基础上,提出了我国发展半导体照明的技术路线,给出了不同发展情景下,我国中长期半导体照明节能潜力的预测结果,并对我国半导体照明发展战略提出了若干政策建议。

关键词: 半导体照明     发展战略    

Photocatalysis: from solar light to hydrogen energy

《能源前沿(英文)》 2021年 第15卷 第3期   页码 565-567 doi: 10.1007/s11708-021-0784-6

标题 作者 时间 类型 操作

Solar photovoltaic fed dual input LED lighting system with constant illumination control

Kinattingal SUNDARESWARAN,Kevin Ark KUMAR,Payyalore Raman VENKATESWARAN,Sankaran PALANI

期刊论文

Flexible resonant tank for a combined converter to achieve an HPS and LED compatible driver

Jin HU,Hui-pin LIN,Zheng-yu LU,Feng-wu ZHOU

期刊论文

固态照明系统中颜色维持率的研究进展

Maryam Yazdan Mehr, Willem Dirk van Driel, 张国旗

期刊论文

Multi-Component Resource Recycling from Waste Light-Emitting Diode Under Hydrothermal Condition: Plastic

Yongliang Zhang,Lu Zhan,Zhenming Xu,

期刊论文

我国LED照明产业高端制造装备自主发展战略

“新一代绿色照明高端制造装备自主发展战略研究”课题组

期刊论文

UV-LED/P25-based photocatalysis for effective degradation of isothiazolone biocide

期刊论文

全光谱 LED 照明用荧光粉发展现状及趋势

陈晓霞,张霞 ,刘荣辉,刘元红,周裔朋,庄卫东

期刊论文

我国新型显示关键材料发展战略研究

高伟男,毕勇,刘新厚,许祖彦

期刊论文

Dymola-based multi-parameters integrated optimization for high speed transfer system of LED chip sorter

Jie OUYANG, Bin LI, Shihua GONG

期刊论文

Research and Practice of Meta-synthesis Management for the Government-led Urban Complex Construction

Ru-gui Chen,Jia-meng Chen

期刊论文

Effects of red and blue LEDs on

Lili CHEN, Xuzhang XUE, Yadong YANG, Fei CHEN, Jie ZHAO, Xiquan WANG, Alam Tariful KHAN, Yuegao HU

期刊论文

LED灯具温度应力加速老化截止时间的确定

Jian HAO, Lei JING, Hong-liang KE, Yao WANG, Qun GAO, Xiao-xun WANG, Qiang SUN, Zhi-jun XU

期刊论文

General framework and case study of China’s LED industry

Bin GUO, Peng DING, Frans J. A. M. GREIDANUS, Wen (Helena) LI

期刊论文

我国半导体照明发展战略研究

刘虹,陈良惠

期刊论文

Photocatalysis: from solar light to hydrogen energy

期刊论文