LED强度可调驱动电路设计论文.doc

编号:
基础工程设计说明书
题目:LED强度可调驱动电路设计
院(系): 电子工程与自动化学院
专业: 光电信息科学与工程
学生姓名: 李朝庭
学号: 1300820112
指导教师: 彭智勇
职称: 高级实验师

2017年 1 月1日
摘要
随着科学技术的进步和生活品质的提高,人们对LED照明的控制水平要求越来越高。为了实现二次节能,人们希望能够实现亮度调节,自由调节灯光的明暗程度。为了营造出不同的气氛,人们希望能够实现色温调节,个性化设置灯光环境。相关研究表明,采用两个调光电源分别驱动高低两种色温的白光LED阵列,通过调节两电源的驱动电流比例能够实现色温调节,但这种方法电源可靠性较低,并且无法实现独立调光。常规色温调节方法采用两个调光电源驱动高低两种色温白光LED阵列,通过调节两种LED的驱动电流比例实现色温调节。本论文在分析了LED调节的常规方法存在的问题的基础上,利用单片机结合数字旋转编码器编程,探讨了LED灯的色温调节和亮度调节方法。
关键词:LED,色温,RGB,调光,旋转编码器,单片机
Abstract
With the progress of science and technology and the improvement of the quality of life, people's demand for the control of LED lighting is getting higher and higher. In order to achieve the two energy saving, people want to be able to achieve brightness adjustment, free adjustment of the degree of light and shade. In order to create a different atmosphere, people want to be able to achieve the temperature regulation, personalized lighting environment. Research shows that, using white LED array two dimming power driven two kinds of high and low temperature, the driving current ratio adjustment two power to achieve temperature regulation, but the methods of power supply reliability is low, and can not achieve independent dimming. The conventional color temperature adjustment method uses two dimming driver level two color temperature of white LED array, the drive current to adjust the proportion of the two kinds of LED achieve color temperature adjustment. Based on the analysis of conventional method LED control problems, combined with the use of single-chip digital encoder programming, discusses a method of modulating LED light color and brightness adjustment.
Keywords: LED, temperature, RGB, light adjustment, rotary encoder, MCU
目录
引言 1
1 设计任务 2
设计题目 2
设计要求 2
2 系统的组成 3
系统的组成总体框图 3
各部分系统的功能 3
方案可行性分析论证与仿真调试 3
3
5
6
LED放大驱动模块 13
14
3 硬件设计 14
元器件选择的依据以及元件参数的确定 14
PCB原理图与电路图布线设计 15