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 i
Abstract ii
第1章 绪论 1
1.1 研究的动机与目的 1
1.2 研究意义 1
1.3 研究方法与系统描述 1
1.4 论文內容概述 2
第2章 人眼结构介绍 3
2.1 眼镜的构造 3
2.1.1 屈光系统 3
2.1.2 感光系统 3
2.2 明视觉和暗视觉 4
2.3 光源的频闪效应及其危害 5
第3章 LED光源及其驱动简介 7
3.1 LED发光原理及其I-V特性 7
3.1.1 LED发光原理 7
3.1.2 LED的I-V特性 7
3.2 LED驱动电路介绍 8
3.2.1 LED驱动的技术方案 8
3.2.2 LED驱动器的直流控制特性 8
3.2.3 LED与驱动器的匹配 9
第4章 LED驱动电路设计、制作及测试 11
4.1 LED背光源设计 11
4.2 LED驱动电路设计 11
4.3 电路的制作与调试 12
4.3.1 电路的制作 12
4.3.2 电路的检测与调试 12
第5章 样本的采取、数据处理及分析 14
5.1 样本采取 14
5.2 数据处理与分析 15
5.2.1 人眼临界闪烁频率的测定 15
5.2.2 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
