Comparison of White Light LED Driver with PWM andDC Signal for Light Detection of Human Vision

• Main Authors: Tom Chao, 趙家宏
• Other Authors: none
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/12229267704911194396

碩士 === 國立中央大學 === 光電科學研究所碩士在職專班 === 94 === The document mainly focus on comparison of White Light LED Driver with PWM and DC Signal and research in detection of human vision and integrating sphere with two different driving methods. The theme want to find out the best white LED drive method for power saving, and use in future lighting technology. The theme is composed of 6 chapters. Chapter 1 is an introduction and illustrates the motive and purpose of the theme. Chapter 2 illustrates the structure, color, driving method and illumination of white light LED. Chapter 3 is the designment of LED driver circuit and program. Chapter 4 is the measurement. In this chapter, we compare frequency and luminance of LED, and we also try to find out difference of human vision and integrating sphere with two different driving methods. Chapter 5 is program simulation. In this chapter, we want to create a model to simulate the result of experiment in chapter 4, and we use this model to clarify the illumination detection response with human vision. Chapter 6 is conclusion and future wok.