本論文研究重點為利用LED光源製作出全頻譜可變換式光源模組，並且利用生理訊號探討照明光於下午時段之影響。本論文之光源模組是由單晶片89X51送出PWM訊號來控制線性穩流電路，達到光源色彩之變化，初步設計低色溫、中色溫、高色溫三種光源。由於不同光源的變化與人類警覺程度的變化之關係是密不可分的，本論文利用腦波(EEG)、皮膚導電係數、皮膚溫度等生理訊號來探討警覺程度的變化，藉由此實驗找出符合個人需求的變換式光源，並且利用本論文所製作的全頻譜可變換式光源模組來達到光源可變的效果，成為更人性化的光源。

This study use LED light to create a full spectral adjustable illuminant module, while use physiological signals to analyze the effect of artificial lighting in the afternoon. The specific module for this study sent PWM signal through 89X51 to control the linear current regulator and in order to change different light. First of all, we design Low CCT, Medium CCT and High CCT those three kinds of light. Because of the significant correlation between the changing of light and human arousal level, therefore this study use Electroencephalography(EEG), skin conductance, and skin temperature to measure the human arousal level from different light. By using this experiment to find out the appropriate illuminant level for each different individual, meanwhile, using the full spectral adjustable illuminant module of this study could be reached the effect of variable illuminant and become more people-friendly lighting.

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