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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/7131


    Title: 應用於號誌燈之非對稱式發光二極體之設計與驗證
    Authors: 李立文;Li-Wen Lee
    Contributors: 光電科學研究所碩士在職專班
    Keywords: 發光二極體;號誌燈;traffic signal;LED
    Date: 2007-01-09
    Issue Date: 2009-09-22 10:50:14 (UTC+8)
    Publisher: 國立中央大學圖書館
    Abstract: 本文主要是針對應用於號誌燈之非對稱式LED之設計與驗證做一系列的探討。首先,介紹交通號誌燈規範的種類及光強度需求,然後再針對目前全球LED交通號誌燈在光學設計上的分類及其優缺點之分析。而後,再藉由量測結果與光學模擬的比對,找出LED發光晶粒之光學模型,利用此發光晶粒之光學模型進行非對稱式LED的光學模擬設計,再進行開模與封裝非對稱式LED。量測封裝後的非對稱式LED與光學模擬結果進行比對,以驗證光學模擬的正確性。之後,再進行號誌燈規範的驗證,以確認此非對稱式LED的實用性。最後,以此非對稱式LED進行封裝性的差異性分析,藉此分析以瞭解封裝上的誤差對光學特性影響,以做為封裝誤差分析的依據。 總括言之,依據交通號誌燈規範應用之特殊光分布需求,以光學模擬的方式,遵循特定的流程,找出符合交通號誌燈需求之特殊配光曲線之非對稱式的LED。之後,對此一非對稱式的LED做一系列實際量測與電腦模擬的比對,以確認此LED光學模型之正確性。最後,將LED組成號誌燈,以號誌燈規範加以驗證,達到降低成本、縮短開發時程與費用,節省能源的目標。 This text is mainly the goal to do a series of discussions to the design and verification of asymmetry type LED that is applied to the traffic signal. First of all, introduce the normal kinds of specifications of the traffic signal and luminous intensity demand, then direct against the analysis of the advantages and shortcomings  of LED traffic signal classification in the optics design in the world at present. And then, we can find out LED chip light optical model according to the comparison between measurement and optical simulation, utilize this give out light optics model of chip to design LED of asymmetry type by computer simulation, and then make the LED mold and package asymmetry type LED. In order to verify the exactness of optics simulation, we measure the optical data of asymmetry type LED to compare with the result of optics simulation. Later, carry on the normal verification of traffic signal specification, in order to confirm the practicability of this asymmetry type LED. Finally, carry on the packaging variation analysis of asymmetry type LED in order to understand the effect upon optics characteristic. According to these results, we can improve the packaging error to reach the goal of packaging uniformity. In a word, according to the special demand of light distribution of traffic signal specification, we can find out the asymmetry type LED to satisfy the special demand of traffic signal by way of optics simulation, follow specific procedure. Later, we can make a series of actual experiments to compare with result of optics simulation in order to confirm the correctness of the LED. Finally, we product the LED traffic signal and measure it by specification of traffic signal in order to verify the practicability. Such as the asymmetry type LED can lower the costs of traffic signal and reach the goal to save the energy.
    Appears in Collections:[光電科學研究所碩士在職專班 ] 博碩士論文

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