小功率（3014）LED设计及光电热性能分析
毕业论文关键词： LED；LED 设计；LED 支架；LED 光性能；LED 热性能；LED 电性能；光通量
Low power (3014) LED light design and performanceanalysis
Abstract ： With the development of economy and the ascension of industrialtechnology, the requirement of environmental protection gradually strengthens, sothere is an increasing demand for green light source. LED， as the fourth generationof light source, is the 21st century the most promising new light source, which willreplace the incandescent lamp and fluorescent lamp and become the dominant in thelighting market. With the enhancement of LED luminous efficiency, especially in the90s of last century, the invention of the white LED opens the space for the applicationof LED in lighting field, making it a new generation of light source followingincandescent lamp, fluorescent lamp and high pressure gas discharge lamp. In the caseof temporization, LED has achieved good use and development. LED has manyadvantages such as a small size, a fast opening time, no stroboscopic, energyconservation, environmental protection, and durable wait. Through long-term researchand development, the Nobel Prize is awarded to the field of LED this year, and so thestudy of the LED will become a developing trend in recent years. However, in spite ofabove these, the comprehensive research of basic data for LED still needs to beimproved, e.g., the impact of fluorescent powder, silica gel and encapsulationstructure on flux in the process of LED encapsulation, because it is difficult to find thebasis of comprehensive data for the late starters to learn and understand myself. Inthis article ， a comprehensive analysis was performed on the performance oflow-power 3014 through designing the basic structure and analyzing the optical andelectric performance and thermal conductivity.For the design of the light source and optical performance, under the the sameother variables, the light bracket design structure is changed and then the change ofoptical performance such as luminous flux and etc. of the finished products wasanalyzed to explore the effect of the stent design change on the properties of lightsource. In addition, the same kinds of light sources, i.e., 3014 were aged for thedifferent time, and then the lighting performance of light source with different agingperiod were comparatively tested and analyzed. Aging means include light of electrical aging and aging environment without light.As to thermal performance analysis of the light source, in this paper, the thermalperformance of the same 3014 light source was analyzed in a certain temperaturegradient. We explored the dependence of the junction temperature, thermal resistanceand voltage on the temperature change.For electrical performance analysis of light source, this paper focused on the testof different input voltage for 3014 light source with the same encapsulation conditionat the constant current, to understand the lowest opening voltage and the best inputvoltage of the light source.