LED灯智能控制器(基于Cortex_M0)毕业论文.doc

重庆理工大学毕业论文 LED灯智能控制器 PAGE iii 毕业论文 LED灯智能控制器(基于Cortex_M0) 摘 要 在节能减碳的全球趋势下， LED照明备受期待，而随着近年高亮度 \o Binay Opto公司可提供告警用LED LED发光效率不断提升，单位成本亦随之下滑，促使高亮度LED应用已不再局限于中小尺寸电子产品，或是笔记本电脑、显示器、电视等较大尺寸背光应用与LED显示广告牌，目前更已开始取代传统白炽灯等照明产品，LED无疑已成为次世代一般照明的重要光源。 该设计能够实现对大功率LED灯的恒流控制，电流波动2.5%，输出电流范围0~350mA可调，在设计中加入了开路、短路、过压欠压等保护措施，并能够通过上位机界面对LED灯的亮度进行调节。LED灯的发光效率可以达到80%~90%，寿命是普通日光灯管的10倍左右，出现问题的几率也很小。LED发出的光，光线柔和，有助于保护人类的眼睛和身体，是一种绿色环保型的电光源。 关键词：LED；能源；效率； ABSTRACT The global trend of energy saving and carbon reduction, LED lighting, highly anticipated, with the rising in recent years, high-brightness LED luminous efficiency, unit costs will decline, prompting a high-brightness LED applications is no longer limited to small-and medium-sized electronic products, or notebook computers, monitors, televisions and other large-size backlight applications with LED display billboards, has even begun to replace traditional incandescent lighting products, LED has undoubtedly become the next generation of general lighting source. The design enables the constant current control for high-power LED lamps, the current fluctuation of 2.5%, the output current range of 0 ~ 350mA adjustable, the open design, short circuit, overvoltage, undervoltage and other protection measures, and through the host computer interface to adjust the brightness of the LED lights. The luminous efficiency of LED lamps can achieve 80% to 90%, life expectancy is about 10 times the ordinary fluorescent tubes, a very small chance of problems. LED light, soft light, help protect the human eye and body, a green power light source. Key words：LED; energy; efficiency; 重庆理工大学毕业论文 LED灯智能控制器 PAGE 2 目 录 TOC \o 1-3 \h \z \u 1 绪论 h 1 2 LED和开关电源工作原理 h 2 2.1 LED的介绍 h 2 2.1.1 LED的特征参数 h 2 2.1.2 LED的电气特性 h 2 2.1.3 LED的调光方式 h 3 2.1.4 大功率LED的优点 h 4 2.1.5 LED灯驱动电路的介绍 h 4 2.2 电源电路基础知识 h 4 2.2.1 变压器实现降压 h 4