- 學位論文
白光LED中場色彩分佈之分析
The analysis of the color distribution of white LED in mid-field region
摘要
本論文中，我們將提出一個架構用以分析並探討白光 LED 中場之色彩分佈，我們將討論當 LED光源上加上二次光學元件時，黃暈的產生之機制，並希望藉此方法於後續的二次光學設計時，可以在設計時就將會導致黃暈的部分進行優化，以達到色彩高均勻度。 在文章中，我們將先對用來量測空間色彩分佈的光譜儀進行校正，接下來針對碗杯型式的封裝體之 LED空間中的色彩變化進行分析，我們使用已建構之YAG螢光粉模型在相同螢光粉濃度下，分別在有無半球形透鏡的條件下建立藍黃光之光學模型，並以實驗驗證其準確性。接著討論將光源加上二次光學透鏡之色彩分佈，並以實驗驗證建立之藍黃光光學模型可用於分析色彩均勻度。而在文章的最後，我們將討論兩種白光 LED 的藍黃光之中場距離分佈。
並列摘要
In this thesis, we propose the framework to analyze and explore the color distribution of the white LED in mid-field. We discuss the mechanism of the yellow ring when the LED light source coupled with secondary optics, and would like to take this approach to the follow-up second optical design. As long we design the part of the second optical elements correctly, the yellow ring can achieve high and uniform color. In this article, we corrected the spectrometer which is used to measure the color distribution of the space. Furthermore, we studied on the deviation of the color distribution in the space for LEDs in-cup encapsulation. Based on the YAG phosphor model, in the same concentration of the phosphor, we constructed simulation results and verified experiments in the case of that with or without the hemispherical lens. Moreover, we also made simulation results and verified experiments when the light source was coupled with the TIR lens. Finally, we discussed the distance of blue and yellow lights.