随着社会的发展人们对生活质量的要求越来越高，照明在能耗中所占的比例日益增加,因而照明节能也日显重要。现在国内外普及使用的节能开关基本有声控型、触摸型、感光型等。而本设计从改变亮度的角度出发，通过检测周围环境的亮度来改变LED灯的照明亮度，或者通过手动调节来改变LED灯的照明亮度，从而达到节能的目的。
本设计通过AT89C51单片机结合LED照明技术来实现对照明设备的智能控制。制作出了满足此设计要求的LED的驱动和反馈控制电路, 并对其性能进行测试和分析。 单片机通过光照检测电路对照明设备周边亮度进行检测，如果亮度不够或亮度过足，单片机就采用反馈电路来实时控制调节LED的亮度，或使其变暗或使其变亮，也可通过手动调节达到目的。但是本设计只是简单说明了其原理，要用于实际时，会有很多弊端，而且容易受到外界各种干扰，从而影响电路正常工作，因此，本文最后也讨论了可能受到的外界干扰和改进的一些方法，让其更具有现实意义。8671
关键词 ： 单片机   LED 驱动　亮度调节  节能
   毕业设计说明书（论文）外文摘要
With the development of society people of the quality of life in demand is higher and higher, lighting in the proportion of energy consumption, thus increasing illumination energy conservation also more and more important. Now universal use energy-saving switch at home and abroad have sonic basic type, touch type, photographic type and so on.This design departure from the point of view to change the brightness, depend on detects the ambient brightness to change the brightness of the lighting of the LED lights, or through manually adjust the lighting brightness of the LED light to change, so as to achieve the purpose of energy saving.
   This design combined by AT89C51 microcontroller with LED lighting technology, to achieve the goal of intelligent control of lighting equipment. Designed the LED driver circuit and the feedback control circuit to meet the requirements of this design, and its performance testing and analysis.
Microcontroller detect peripheral brightness of lighting equipment through the light detection circuit,if the brightness is not enough or had too much brightness，then microcontroller controls and adjusts the brightness of the LED with real-time by feedback circuit，or make it darker or make it brighter. we can also achieve this goal by manual adjustment.However,this design is just a brief description of its principle，if to be used for practical, there will be a lot of drawbacks,and vulnerable to all kinds of interference from outside,and affect the circuit to work, Finally, the paper also discussed the potential disruption from outside and some improvement methods，to make it even more practical significance.
Keywords:microcontroller LED drive brightness adjustment energy-save   
   目  录
摘  要I
Abstract.II
前  言1
1 概述2
1.1 课题研究背景及概况2
1.2 课题研究的用途与意义3
1.2.1 用途.3
1.2.2 意义.3
1.2.3 研究任务书和设计依据.4
1.2.4 应用实例列举.4
1.3  完成的工作.5
1.4  本章小结.6
2  LED照明自动控制系统6
2.1 LED介绍6
2.2 发光原理8
2.3 发展历史8
2.4 发展前景.10
2.5 优缺点.10
 2.5.1  优点10
 2.5.2  缺点12
2.6 本章小结.13
3 硬件电路设计与实现.13
3.1 系统硬件总述.13
3.1.1 系统工作原理描述13
3.2 单片机主控系统.14

3.3 光强信号检测系统.15
3.4 LED灯驱动系统17
3.5 数码管显示系统.20
3.6 按键控制系统.22
3.7 本章小结.23
4 系统软件设计及实现.23 AT89C51单片机LED控制器控制电路模块设计:http://www.751com.cn/wuli/lunwen_7095.html