交流发光二极管（AC LED）发光特性的研究与应用

发布时间：2018-01-20 23:36

本文关键词： 等价光效交流发光二极管(AC LED) 光通量电路设计发光效率　出处：《大连工业大学》2015年硕士论文　论文类型：学位论文

【摘要】：近些年来,发光二极管(LED)以其固有的高效、节能、绿色环保、长寿命等优点,受到越来越多的关注,并已逐步进入了普通照明的领域。我们日常使用的电源均是高压交流电(110V220V),因此针对直接采用交流源直接驱动的AC LED的研究也备受瞩目。交流发光二极管(AC LED)电流交变的特性使其不能如DC LED那样简单地由电功率与发光效率的乘积得到光通量。本文正是基于AC LED的交流电工作特性与电路结构而展开,对其光发光特性进行了研究。本文首先阐述了AC LED内部晶粒的排列结构特点以及应用电路的工作原理;然后对AC LED的工作特性进行了分析,继而根据交流电有效电流和LED的光电特性引入了AC LED等价光效的概念,由AC LED的应用电路分别建立AC LED光通量和发光效率与等价光效、LED串联颗数之间的数学模型;借助MATLAB软件绘制了光通量和光效曲线,并分析曲线特点;通过改造一款LED玉米灯制备AC LED光源,建立实验测试系统,对理论分析进行验证,实验结果与理论分析相符。最后,本文根据得到的结论提出了一种按照给定光通量设计AC LED电路的方法,该方法通过AC LED的晶粒串联数量与等价光效得到理论光通量。同时,本文建立了AC LED光通量设计参数的数据表。本文通过理论分析与实验验证对AC LED的发光特性进行了分析,提出了一种能够按照给定光通量设计AC LED的新型方法,该设计方法新颖,切实可行,为AC LED的设计提供了新的思想和理论依据。
[Abstract]:In recent years, LED) has attracted more and more attention due to its inherent advantages of high efficiency, energy saving, environmental protection, long life and so on. And has gradually entered the field of ordinary lighting. Our daily use of power supply is high voltage AC 110V 220V). Therefore, the research of AC LED, which is directly driven by AC source, has attracted much attention. Ac LED (AC LED). Because of the characteristic of alternating current, it can not simply get luminous flux from the product of electric power and luminous efficiency as DC LED. This paper is based on AC LED's AC characteristics and circuit structure. The photoluminescence characteristics of AC LED are studied. Firstly, the structure of crystal grains in AC LED and the working principle of the application circuit are described. Then the working characteristics of AC LED are analyzed, and the concept of AC LED equivalent light efficiency is introduced according to the AC effective current and the photoelectric characteristics of LED. The mathematical models between the luminous flux and luminous efficiency of AC LED and the number of series particles in series are established by the application circuit of AC LED. The luminous flux and luminous efficiency curves are plotted by MATLAB software, and the characteristics of the curves are analyzed. By modifying a LED corn lamp to prepare AC LED light source, the experimental test system was established, and the theoretical analysis was verified. The experimental results were consistent with the theoretical analysis. In this paper, a method of designing AC LED circuits according to given luminous flux is presented. The theoretical luminous flux is obtained by the number of grains in series and the equivalent light efficiency of AC LED. In this paper, the data table of the luminous flux design parameters of AC LED is established. The luminescent characteristics of AC LED are analyzed by theoretical analysis and experimental verification. A new design method of AC LED based on given luminous flux is presented. The design method is novel and feasible. It provides a new idea and theoretical basis for the design of AC LED.
【学位授予单位】：大连工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN312.8

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