三基色LED合成白光论文.doc

专业资料专业专心专注编号: 课程设计题目: LED 驱动设计模拟太阳光谱学院: 电子工程与自动化学院专业: 光信息科学与技术学生姓名: 黄焕安学号: 0800830210 指导教师: 秦祖军 2011 年 12月 26日 1 摘要白光LED 以其特有的节能、环保、响应快、长寿命、可靠性高等显著优势迅速取代日光灯和白炽灯成为通用照明领域的主流产品。其亮度高,自然,像太阳光更适合应用于汽车或室外作业照明场合。课题以此为背景,根据白光 LED 的光学特性,它主要有红绿蓝三基色组成,因此用红、绿、蓝三基色 LED 合成白光模拟太阳光谱。通过单片机编程控制输出 PWM 信号,利用中断控制器占空比变化, 实现三基色的调光,使合成的白光的到优化,更近似太阳光。关键词:三基色白光 LED ;PWM ;调光; LED 驱动;太阳光谱 Abstract White light LED rapidly replacing the fluorescent lamp and the incandescent lamp as general illumination of the mainstream by its advantages of unique energy-saving, environmental protection, fast response, long life, high reliability. Its high brightness, natural, like the light of the sun is more suitable for application in automotive or outdoor lighting applications. Task was used as the background, according to the white light LED optical properties, which are posed of red green blue three primary colors, used red, green, and blue three primary colors LED synthesis white light for solar spectrum simulation. Through the MCU programming control output PWM signal, the interrupt controller of duty cycle, to achieve three primary color light, enabling the synthesis of white light to optimize, more similar to the sun. Key words: three color white LED; PWM; Light modulation; LED drive; solar spectrum 2 目录 1 设计任务............................................................................................................................... 3 2 应用背景............................................................................................................................... 3 人类对LED的应用概述......................................................................................... 3 白光 LED 是大尺寸背光应用重要技术发展方向............................................... 3 3 太阳光谱结构.................................................................................................................. 4 4 三基色 LED 模拟白光论证.......................................................................................... 5 色温及通光量............