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论文编号:WLX044 字数:11286,页数:25摘 要 随着电子化的高速发展，人们生活在交流荧光灯下和电视机荧光灯前，甚至伴以眼花缭乱的艺术灯光，光源闪烁对视觉系统的影响问题日益突出。因此测定人眼临界闪烁频率是非常有必要的。本课题首先了解了人眼的结构，特别是两种视觉细胞――锥状细胞和杆状细胞不同作用，以及查阅LED驱动电路的设计要求。其次通过分析实验的要求，设计出了较好的LED驱动电路，能用信号源频率对LED闪烁频率进行控制，从而为我们测人眼临界闪烁频率打下了硬件基础。最后通过对样本进行测试，对测得的数据进行处理、统计得到人眼临界闪烁频率。并且讨论不同条件下对人眼临界闪烁频率的影响，进一步了解了在何种条件下人眼的敏感度较强。关键词：人眼结构 LED驱动 临界频率Abstract With the rapid development of electronic, people live in the alternating Current’s Fluorescent and the television’s Fluorescent world during all the day, even accompanied by dazzling light art, so flashing light on the impact of the visual system have become increasingly prominent. Therefore determine the critical flicker frequency of human eye is necessary. The subject first learned about the structure of the human eye, In particular, two kinds of visual cells-- cone cells and rod-shaped cells in different roles, and consulted a number of books about LED drive circuit design requirements. Second, by analyzing the experimental requirements, we design a better LED driver circuit, which can via the signal source frequency to control the frequency of the LED flash. Thus It’s laid a hardware foundation of measured the critical flicker frequency of the human eye. Finally, with processed and counted the date tested sample, we can calculate the critical flicker frequency of the human eye.. We also discussed the conditions change whether has effect on the critical flicker frequency of the human eye, and learn more about our eye have the strong sensitivity under which condition.Keywords: Structure of the human eye; LED driver; Critical frequency目 录摘 要 iAbstract ii第1章 绪论 11.1 研究的动机与目的 11.2 研究意义 11.3 研究方法与系统描述 11.4 论文热莞攀 2第2章 人眼结构介绍 32.1 眼镜的构造 32.1.1 屈光系统 32.1.2 感光系统 32.2 明视觉和暗视觉 42.3 光源的频闪效应及其危害 5第3章 LED光源及其驱动简介 73.1 LED发光原理及其I-V特性 73.1.1 LED发光原理 73.1.2 LED的I-V特性 73.2 LED驱动电路介绍 83.2.1 LED驱动的技术方案 83.2.2 LED驱动器的直流控制特性 83.2.3 LED与驱动器的匹配 9第4章 LED驱动电路设计、制作及测试 114.1 LED背光源设计 114.2 LED驱动电路设计 114.3 电路的制作与调试 124.3.1 电路的制作 124.3.2 电路的检测与调试 12第5章 样本的采取、数据处理及分析 145.1 样本采取 145.2 数据处理与分析 155.2.1 人眼临界闪烁频率的测定 155.2.2 临界闪烁频率在不同条件下的区别 15第6章 结束语 19致 谢 20参考文献 21 |
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